/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 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:39:13,570 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:39:13,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:39:13,611 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 18:39:13,682 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 [2021-07-09 18:39:13,719 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:39:13,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:39:13,720 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:39:13,720 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:39:13,722 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:39:13,722 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:39:13,723 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:39:13,723 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:39:13,723 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:39:13,723 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:39:13,724 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:39:13,724 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:39:13,724 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:39:13,724 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:39:13,724 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:39:13,725 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:39:13,725 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:39:13,725 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:39:13,725 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:39:13,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:39:13,725 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:39:13,725 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:39:13,726 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:39:13,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:39:13,726 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:39:13,726 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:39:13,726 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:39:13,726 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:39:13,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:39:13,727 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:39:13,727 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:39:13,727 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:39:14,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:39:14,056 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:39:14,059 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:39:14,060 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:39:14,061 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:39:14,062 INFO L432 ainManager$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 [2021-07-09 18:39:14,063 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/parray-copy.wvr.bpl' [2021-07-09 18:39:14,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:39:14,232 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:39:14,233 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:39:14,233 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:39:14,233 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:39:14,244 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 09.07 06:39:14" (1/1) ... [2021-07-09 18:39:14,252 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 09.07 06:39:14" (1/1) ... [2021-07-09 18:39:14,258 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:39:14,260 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:39:14,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:39:14,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:39:14,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:39:14" (1/1) ... [2021-07-09 18:39:14,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:39:14" (1/1) ... [2021-07-09 18:39:14,268 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:39:14" (1/1) ... [2021-07-09 18:39:14,268 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:39:14" (1/1) ... [2021-07-09 18:39:14,271 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:39:14" (1/1) ... [2021-07-09 18:39:14,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:39:14" (1/1) ... [2021-07-09 18:39:14,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:39:14" (1/1) ... [2021-07-09 18:39:14,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:39:14,279 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:39:14,279 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:39:14,279 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:39:14,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:39:14" (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 [2021-07-09 18:39:14,346 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:39:14,347 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:39:14,347 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:39:14,347 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:39:14,347 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:39:14,347 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:39:14,347 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:39:14,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:39:14,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:39:14,348 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 18:39:14,348 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 18:39:14,348 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 18:39:14,349 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 18:39:14,601 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:39:14,601 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 18:39:14,603 INFO L202 PluginConnector]: Adding new model parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:39:14 BoogieIcfgContainer [2021-07-09 18:39:14,613 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:39:14,614 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:39:14,614 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:39:14,617 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:39:14,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:39:14" (1/2) ... [2021-07-09 18:39:14,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43c32bb3 and model type parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:39:14, skipping insertion in model container [2021-07-09 18:39:14,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:39:14" (2/2) ... [2021-07-09 18:39:14,619 INFO L111 eAbstractionObserver]: Analyzing ICFG parray-copy.wvr.bpl [2021-07-09 18:39:14,624 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:39:14,624 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:39:14,624 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:39:14,625 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:39:14,661 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-09 18:39:14,679 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-09 18:39:14,711 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:39:14,712 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:39:14,712 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:39:14,712 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:39:14,712 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:39:14,712 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:39:14,712 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:39:14,712 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:39:14,721 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 31 transitions, 86 flow [2021-07-09 18:39:14,786 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) [2021-07-09 18:39:14,788 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) [2021-07-09 18:39:14,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 18:39:14,797 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:14,797 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] [2021-07-09 18:39:14,797 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:14,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:14,806 INFO L82 PathProgramCache]: Analyzing trace with hash -482426042, now seen corresponding path program 1 times [2021-07-09 18:39:14,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:14,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623898513] [2021-07-09 18:39:14,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:14,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:14,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:14,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623898513] [2021-07-09 18:39:14,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623898513] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:39:14,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:39:14,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:39:14,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761848797] [2021-07-09 18:39:15,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:39:15,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:15,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:39:15,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:39:15,022 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) [2021-07-09 18:39:15,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:15,094 INFO L93 Difference]: Finished difference Result 135 states and 376 transitions. [2021-07-09 18:39:15,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:39:15,096 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 [2021-07-09 18:39:15,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:15,105 INFO L225 Difference]: With dead ends: 135 [2021-07-09 18:39:15,106 INFO L226 Difference]: Without dead ends: 135 [2021-07-09 18:39:15,107 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:39:15,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-07-09 18:39:15,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-07-09 18:39:15,144 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) [2021-07-09 18:39:15,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 376 transitions. [2021-07-09 18:39:15,147 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 376 transitions. Word has length 20 [2021-07-09 18:39:15,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:15,148 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 376 transitions. [2021-07-09 18:39:15,148 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) [2021-07-09 18:39:15,148 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 376 transitions. [2021-07-09 18:39:15,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:39:15,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:15,150 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] [2021-07-09 18:39:15,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:39:15,151 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:15,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:15,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1659723100, now seen corresponding path program 1 times [2021-07-09 18:39:15,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:15,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095024062] [2021-07-09 18:39:15,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:15,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:15,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:39:15,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:15,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095024062] [2021-07-09 18:39:15,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095024062] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:39:15,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:39:15,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:39:15,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079024001] [2021-07-09 18:39:15,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:39:15,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:15,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:39:15,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:39:15,202 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) [2021-07-09 18:39:15,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:15,278 INFO L93 Difference]: Finished difference Result 185 states and 524 transitions. [2021-07-09 18:39:15,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:39:15,280 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 [2021-07-09 18:39:15,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:15,283 INFO L225 Difference]: With dead ends: 185 [2021-07-09 18:39:15,283 INFO L226 Difference]: Without dead ends: 185 [2021-07-09 18:39:15,284 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:39:15,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-07-09 18:39:15,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 160. [2021-07-09 18:39:15,301 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) [2021-07-09 18:39:15,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 450 transitions. [2021-07-09 18:39:15,302 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 450 transitions. Word has length 22 [2021-07-09 18:39:15,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:15,303 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 450 transitions. [2021-07-09 18:39:15,303 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) [2021-07-09 18:39:15,303 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 450 transitions. [2021-07-09 18:39:15,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:39:15,305 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:15,305 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] [2021-07-09 18:39:15,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 18:39:15,305 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:15,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:15,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1666279556, now seen corresponding path program 1 times [2021-07-09 18:39:15,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:15,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864792097] [2021-07-09 18:39:15,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:15,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:15,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:15,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864792097] [2021-07-09 18:39:15,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864792097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:15,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896577121] [2021-07-09 18:39:15,630 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 [2021-07-09 18:39:15,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:15,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:39:15,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:16,078 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 [2021-07-09 18:39:16,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:16,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:16,094 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. [2021-07-09 18:39:16,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:20 [2021-07-09 18:39:16,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:16,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896577121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:16,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:16,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-07-09 18:39:16,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864565147] [2021-07-09 18:39:16,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:39:16,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:16,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:39:16,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:39:16,133 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) [2021-07-09 18:39:16,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:16,681 INFO L93 Difference]: Finished difference Result 395 states and 1116 transitions. [2021-07-09 18:39:16,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:39:16,682 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 [2021-07-09 18:39:16,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:16,685 INFO L225 Difference]: With dead ends: 395 [2021-07-09 18:39:16,685 INFO L226 Difference]: Without dead ends: 280 [2021-07-09 18:39:16,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 630.9ms TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:39:16,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-07-09 18:39:16,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 194. [2021-07-09 18:39:16,700 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) [2021-07-09 18:39:16,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 558 transitions. [2021-07-09 18:39:16,701 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 558 transitions. Word has length 24 [2021-07-09 18:39:16,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:16,701 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 558 transitions. [2021-07-09 18:39:16,702 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) [2021-07-09 18:39:16,702 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 558 transitions. [2021-07-09 18:39:16,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:39:16,704 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:16,704 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] [2021-07-09 18:39:16,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-09 18:39:16,929 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:16,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:16,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1670859648, now seen corresponding path program 2 times [2021-07-09 18:39:16,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:16,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021995446] [2021-07-09 18:39:16,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:16,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:17,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:17,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:17,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021995446] [2021-07-09 18:39:17,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021995446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:17,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378249363] [2021-07-09 18:39:17,195 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 [2021-07-09 18:39:17,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:39:17,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:17,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:39:17,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:17,419 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 [2021-07-09 18:39:17,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:17,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:17,434 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. [2021-07-09 18:39:17,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:23 [2021-07-09 18:39:17,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:17,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378249363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:17,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:17,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:39:17,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401019479] [2021-07-09 18:39:17,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:39:17,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:17,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:39:17,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:39:17,537 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) [2021-07-09 18:39:18,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:18,749 INFO L93 Difference]: Finished difference Result 639 states and 1800 transitions. [2021-07-09 18:39:18,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:39:18,750 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 [2021-07-09 18:39:18,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:18,754 INFO L225 Difference]: With dead ends: 639 [2021-07-09 18:39:18,754 INFO L226 Difference]: Without dead ends: 546 [2021-07-09 18:39:18,754 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1129.5ms TimeCoverageRelationStatistics Valid=307, Invalid=1253, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:39:18,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-07-09 18:39:18,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 281. [2021-07-09 18:39:18,770 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) [2021-07-09 18:39:18,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 809 transitions. [2021-07-09 18:39:18,771 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 809 transitions. Word has length 24 [2021-07-09 18:39:18,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:18,772 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 809 transitions. [2021-07-09 18:39:18,772 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) [2021-07-09 18:39:18,772 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 809 transitions. [2021-07-09 18:39:18,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:18,774 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:18,774 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] [2021-07-09 18:39:18,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:18,975 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:18,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:18,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1190941142, now seen corresponding path program 3 times [2021-07-09 18:39:18,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:18,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212402649] [2021-07-09 18:39:18,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:18,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:19,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:19,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:19,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212402649] [2021-07-09 18:39:19,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212402649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:19,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945233094] [2021-07-09 18:39:19,040 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 [2021-07-09 18:39:19,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:39:19,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:19,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:39:19,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:19,176 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 [2021-07-09 18:39:19,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:19,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:19,189 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. [2021-07-09 18:39:19,189 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-07-09 18:39:19,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:39:19,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945233094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:19,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:19,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-09 18:39:19,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066702368] [2021-07-09 18:39:19,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:39:19,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:19,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:39:19,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:39:19,321 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) [2021-07-09 18:39:20,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:20,876 INFO L93 Difference]: Finished difference Result 1001 states and 2814 transitions. [2021-07-09 18:39:20,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:39:20,877 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 [2021-07-09 18:39:20,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:20,882 INFO L225 Difference]: With dead ends: 1001 [2021-07-09 18:39:20,883 INFO L226 Difference]: Without dead ends: 966 [2021-07-09 18:39:20,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 898.0ms TimeCoverageRelationStatistics Valid=549, Invalid=2757, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:39:20,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-07-09 18:39:20,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 305. [2021-07-09 18:39:20,899 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) [2021-07-09 18:39:20,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 889 transitions. [2021-07-09 18:39:20,900 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 889 transitions. Word has length 26 [2021-07-09 18:39:20,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:20,901 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 889 transitions. [2021-07-09 18:39:20,901 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) [2021-07-09 18:39:20,901 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 889 transitions. [2021-07-09 18:39:20,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:20,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:20,903 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] [2021-07-09 18:39:21,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:21,121 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:21,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:21,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1175480346, now seen corresponding path program 4 times [2021-07-09 18:39:21,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:21,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676006321] [2021-07-09 18:39:21,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:21,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:21,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:21,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:21,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676006321] [2021-07-09 18:39:21,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676006321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:21,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884836420] [2021-07-09 18:39:21,182 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 [2021-07-09 18:39:21,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:39:21,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:21,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:39:21,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:21,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:21,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884836420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:21,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:21,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:39:21,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937324667] [2021-07-09 18:39:21,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:39:21,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:21,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:39:21,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:39:21,320 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) [2021-07-09 18:39:22,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:22,171 INFO L93 Difference]: Finished difference Result 1201 states and 3376 transitions. [2021-07-09 18:39:22,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:39:22,172 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 [2021-07-09 18:39:22,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:22,178 INFO L225 Difference]: With dead ends: 1201 [2021-07-09 18:39:22,178 INFO L226 Difference]: Without dead ends: 1201 [2021-07-09 18:39:22,179 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 509.8ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:39:22,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-07-09 18:39:22,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 365. [2021-07-09 18:39:22,195 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) [2021-07-09 18:39:22,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 1127 transitions. [2021-07-09 18:39:22,197 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 1127 transitions. Word has length 26 [2021-07-09 18:39:22,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:22,197 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 1127 transitions. [2021-07-09 18:39:22,197 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) [2021-07-09 18:39:22,197 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 1127 transitions. [2021-07-09 18:39:22,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:22,199 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:22,199 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] [2021-07-09 18:39:22,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:22,413 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:22,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:22,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1693913438, now seen corresponding path program 5 times [2021-07-09 18:39:22,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:22,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765148098] [2021-07-09 18:39:22,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:22,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:22,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:22,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:22,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765148098] [2021-07-09 18:39:22,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765148098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:22,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414131824] [2021-07-09 18:39:22,464 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 [2021-07-09 18:39:22,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:39:22,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:22,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:39:22,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:22,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:22,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414131824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:22,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:22,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:39:22,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208718492] [2021-07-09 18:39:22,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:39:22,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:22,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:39:22,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:39:22,627 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) [2021-07-09 18:39:23,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:23,577 INFO L93 Difference]: Finished difference Result 1858 states and 5235 transitions. [2021-07-09 18:39:23,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:39:23,577 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 [2021-07-09 18:39:23,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:23,590 INFO L225 Difference]: With dead ends: 1858 [2021-07-09 18:39:23,590 INFO L226 Difference]: Without dead ends: 1858 [2021-07-09 18:39:23,591 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 570.6ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:39:23,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-07-09 18:39:23,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 388. [2021-07-09 18:39:23,614 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) [2021-07-09 18:39:23,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1232 transitions. [2021-07-09 18:39:23,616 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1232 transitions. Word has length 26 [2021-07-09 18:39:23,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:23,616 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 1232 transitions. [2021-07-09 18:39:23,616 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) [2021-07-09 18:39:23,616 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1232 transitions. [2021-07-09 18:39:23,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:23,618 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:23,619 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] [2021-07-09 18:39:23,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-07-09 18:39:23,842 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:23,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:23,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1481056820, now seen corresponding path program 6 times [2021-07-09 18:39:23,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:23,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22889485] [2021-07-09 18:39:23,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:23,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:23,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:23,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:23,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22889485] [2021-07-09 18:39:23,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22889485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:23,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614055320] [2021-07-09 18:39:23,905 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 [2021-07-09 18:39:23,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:39:23,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:23,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:39:23,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:24,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614055320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:24,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:24,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:39:24,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538598583] [2021-07-09 18:39:24,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:39:24,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:24,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:39:24,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:39:24,021 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) [2021-07-09 18:39:24,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:24,671 INFO L93 Difference]: Finished difference Result 1674 states and 4689 transitions. [2021-07-09 18:39:24,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:39:24,672 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 [2021-07-09 18:39:24,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:24,680 INFO L225 Difference]: With dead ends: 1674 [2021-07-09 18:39:24,680 INFO L226 Difference]: Without dead ends: 1670 [2021-07-09 18:39:24,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 372.7ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:39:24,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-07-09 18:39:24,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 402. [2021-07-09 18:39:24,703 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) [2021-07-09 18:39:24,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1269 transitions. [2021-07-09 18:39:24,704 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1269 transitions. Word has length 26 [2021-07-09 18:39:24,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:24,704 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1269 transitions. [2021-07-09 18:39:24,704 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) [2021-07-09 18:39:24,704 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1269 transitions. [2021-07-09 18:39:24,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:24,706 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:24,706 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] [2021-07-09 18:39:24,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:24,921 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:24,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:24,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1751566512, now seen corresponding path program 7 times [2021-07-09 18:39:24,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:24,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163092891] [2021-07-09 18:39:24,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:24,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:24,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:24,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163092891] [2021-07-09 18:39:24,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163092891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:24,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939146447] [2021-07-09 18:39:24,966 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 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 [2021-07-09 18:39:24,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:24,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:39:24,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:25,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:25,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939146447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:25,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:25,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:39:25,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843003989] [2021-07-09 18:39:25,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:39:25,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:25,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:39:25,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:39:25,079 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) [2021-07-09 18:39:25,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:25,714 INFO L93 Difference]: Finished difference Result 1844 states and 5052 transitions. [2021-07-09 18:39:25,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:39:25,714 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 [2021-07-09 18:39:25,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:25,722 INFO L225 Difference]: With dead ends: 1844 [2021-07-09 18:39:25,722 INFO L226 Difference]: Without dead ends: 1844 [2021-07-09 18:39:25,723 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 379.3ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:39:25,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-07-09 18:39:25,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 400. [2021-07-09 18:39:25,745 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) [2021-07-09 18:39:25,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1264 transitions. [2021-07-09 18:39:25,747 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1264 transitions. Word has length 26 [2021-07-09 18:39:25,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:25,747 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 1264 transitions. [2021-07-09 18:39:25,747 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) [2021-07-09 18:39:25,747 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1264 transitions. [2021-07-09 18:39:25,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:25,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:25,748 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] [2021-07-09 18:39:25,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:25,971 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:25,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:25,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1992513178, now seen corresponding path program 8 times [2021-07-09 18:39:25,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:25,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590432028] [2021-07-09 18:39:25,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:26,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:26,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:26,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590432028] [2021-07-09 18:39:26,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590432028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:26,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751515312] [2021-07-09 18:39:26,036 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 [2021-07-09 18:39:26,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:39:26,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:26,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:39:26,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:26,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:26,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751515312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:26,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:26,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:39:26,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070718922] [2021-07-09 18:39:26,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:39:26,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:26,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:39:26,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:39:26,176 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) [2021-07-09 18:39:26,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:26,693 INFO L93 Difference]: Finished difference Result 1308 states and 3890 transitions. [2021-07-09 18:39:26,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:39:26,693 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 [2021-07-09 18:39:26,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:26,698 INFO L225 Difference]: With dead ends: 1308 [2021-07-09 18:39:26,698 INFO L226 Difference]: Without dead ends: 1308 [2021-07-09 18:39:26,699 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 323.8ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:39:26,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-07-09 18:39:26,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 415. [2021-07-09 18:39:26,715 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) [2021-07-09 18:39:26,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1337 transitions. [2021-07-09 18:39:26,716 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1337 transitions. Word has length 26 [2021-07-09 18:39:26,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:26,717 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1337 transitions. [2021-07-09 18:39:26,717 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) [2021-07-09 18:39:26,717 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1337 transitions. [2021-07-09 18:39:26,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:26,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:26,718 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] [2021-07-09 18:39:26,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-09 18:39:26,933 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:26,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:26,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1182457080, now seen corresponding path program 9 times [2021-07-09 18:39:26,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:26,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993849050] [2021-07-09 18:39:26,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:26,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:26,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:26,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993849050] [2021-07-09 18:39:26,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993849050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:26,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285493217] [2021-07-09 18:39:26,989 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 [2021-07-09 18:39:27,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:39:27,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:27,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:39:27,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:27,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:27,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285493217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:27,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:27,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:39:27,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556410009] [2021-07-09 18:39:27,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:39:27,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:27,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:39:27,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:39:27,102 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) [2021-07-09 18:39:27,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:27,514 INFO L93 Difference]: Finished difference Result 1124 states and 3354 transitions. [2021-07-09 18:39:27,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:39:27,515 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 [2021-07-09 18:39:27,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:27,519 INFO L225 Difference]: With dead ends: 1124 [2021-07-09 18:39:27,519 INFO L226 Difference]: Without dead ends: 1120 [2021-07-09 18:39:27,519 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 255.7ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:39:27,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-07-09 18:39:27,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 421. [2021-07-09 18:39:27,532 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) [2021-07-09 18:39:27,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1358 transitions. [2021-07-09 18:39:27,533 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1358 transitions. Word has length 26 [2021-07-09 18:39:27,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:27,534 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 1358 transitions. [2021-07-09 18:39:27,534 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) [2021-07-09 18:39:27,534 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1358 transitions. [2021-07-09 18:39:27,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:27,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:27,535 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] [2021-07-09 18:39:27,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:27,759 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:27,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:27,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1452966772, now seen corresponding path program 10 times [2021-07-09 18:39:27,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:27,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655635906] [2021-07-09 18:39:27,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:27,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:27,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:27,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:27,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655635906] [2021-07-09 18:39:27,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655635906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:27,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369508247] [2021-07-09 18:39:27,802 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 [2021-07-09 18:39:27,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:39:27,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:27,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:39:27,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:27,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:27,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369508247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:27,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:27,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:39:27,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353198320] [2021-07-09 18:39:27,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:39:27,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:27,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:39:27,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:39:27,921 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) [2021-07-09 18:39:28,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:28,330 INFO L93 Difference]: Finished difference Result 1207 states and 3549 transitions. [2021-07-09 18:39:28,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:39:28,331 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 [2021-07-09 18:39:28,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:28,336 INFO L225 Difference]: With dead ends: 1207 [2021-07-09 18:39:28,336 INFO L226 Difference]: Without dead ends: 1207 [2021-07-09 18:39:28,336 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 277.9ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:39:28,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2021-07-09 18:39:28,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 415. [2021-07-09 18:39:28,360 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) [2021-07-09 18:39:28,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1337 transitions. [2021-07-09 18:39:28,362 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1337 transitions. Word has length 26 [2021-07-09 18:39:28,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:28,362 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1337 transitions. [2021-07-09 18:39:28,362 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) [2021-07-09 18:39:28,362 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1337 transitions. [2021-07-09 18:39:28,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:28,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:28,363 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] [2021-07-09 18:39:28,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:28,577 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:28,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:28,577 INFO L82 PathProgramCache]: Analyzing trace with hash 2037994958, now seen corresponding path program 11 times [2021-07-09 18:39:28,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:28,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796381665] [2021-07-09 18:39:28,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:28,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:28,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:28,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:28,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796381665] [2021-07-09 18:39:28,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796381665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:28,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500822589] [2021-07-09 18:39:28,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:39:28,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:39:28,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:28,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:39:28,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:28,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:28,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500822589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:28,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:28,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:39:28,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532966186] [2021-07-09 18:39:28,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:39:28,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:28,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:39:28,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:39:28,731 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) [2021-07-09 18:39:28,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:28,957 INFO L93 Difference]: Finished difference Result 824 states and 2512 transitions. [2021-07-09 18:39:28,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:39:28,957 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 [2021-07-09 18:39:28,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:28,961 INFO L225 Difference]: With dead ends: 824 [2021-07-09 18:39:28,961 INFO L226 Difference]: Without dead ends: 812 [2021-07-09 18:39:28,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 135.5ms TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:39:28,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-07-09 18:39:28,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 433. [2021-07-09 18:39:28,973 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) [2021-07-09 18:39:28,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1390 transitions. [2021-07-09 18:39:28,975 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1390 transitions. Word has length 26 [2021-07-09 18:39:28,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:28,975 INFO L482 AbstractCegarLoop]: Abstraction has 433 states and 1390 transitions. [2021-07-09 18:39:28,975 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) [2021-07-09 18:39:28,975 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1390 transitions. [2021-07-09 18:39:28,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:28,977 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:28,977 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] [2021-07-09 18:39:29,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-09 18:39:29,193 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:29,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:29,193 INFO L82 PathProgramCache]: Analyzing trace with hash 545990226, now seen corresponding path program 12 times [2021-07-09 18:39:29,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:29,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256090447] [2021-07-09 18:39:29,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:29,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:29,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:29,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256090447] [2021-07-09 18:39:29,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256090447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:29,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215883995] [2021-07-09 18:39:29,245 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 [2021-07-09 18:39:29,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:39:29,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:29,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:39:29,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:29,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:29,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215883995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:29,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:29,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:39:29,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859328550] [2021-07-09 18:39:29,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:39:29,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:29,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:39:29,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:39:29,353 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) [2021-07-09 18:39:29,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:29,688 INFO L93 Difference]: Finished difference Result 999 states and 2955 transitions. [2021-07-09 18:39:29,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:39:29,689 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 [2021-07-09 18:39:29,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:29,693 INFO L225 Difference]: With dead ends: 999 [2021-07-09 18:39:29,693 INFO L226 Difference]: Without dead ends: 995 [2021-07-09 18:39:29,694 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 190.1ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:39:29,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-07-09 18:39:29,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 472. [2021-07-09 18:39:29,706 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) [2021-07-09 18:39:29,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1518 transitions. [2021-07-09 18:39:29,707 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1518 transitions. Word has length 26 [2021-07-09 18:39:29,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:29,708 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1518 transitions. [2021-07-09 18:39:29,708 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) [2021-07-09 18:39:29,708 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1518 transitions. [2021-07-09 18:39:29,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:29,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:29,709 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] [2021-07-09 18:39:29,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-09 18:39:29,931 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:29,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:29,931 INFO L82 PathProgramCache]: Analyzing trace with hash 816499918, now seen corresponding path program 13 times [2021-07-09 18:39:29,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:29,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999857534] [2021-07-09 18:39:29,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:29,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:29,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:29,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:29,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999857534] [2021-07-09 18:39:29,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999857534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:29,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764291743] [2021-07-09 18:39:29,972 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 [2021-07-09 18:39:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:30,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:39:30,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:30,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:30,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764291743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:30,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:30,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:39:30,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863598628] [2021-07-09 18:39:30,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:39:30,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:30,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:39:30,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:39:30,068 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) [2021-07-09 18:39:30,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:30,420 INFO L93 Difference]: Finished difference Result 1053 states and 3099 transitions. [2021-07-09 18:39:30,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:39:30,420 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 [2021-07-09 18:39:30,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:30,424 INFO L225 Difference]: With dead ends: 1053 [2021-07-09 18:39:30,424 INFO L226 Difference]: Without dead ends: 1053 [2021-07-09 18:39:30,425 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 224.2ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:39:30,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-07-09 18:39:30,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 464. [2021-07-09 18:39:30,436 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) [2021-07-09 18:39:30,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1496 transitions. [2021-07-09 18:39:30,438 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1496 transitions. Word has length 26 [2021-07-09 18:39:30,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:30,438 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1496 transitions. [2021-07-09 18:39:30,438 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) [2021-07-09 18:39:30,438 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1496 transitions. [2021-07-09 18:39:30,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:30,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:30,439 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] [2021-07-09 18:39:30,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 18:39:30,648 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:30,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:30,649 INFO L82 PathProgramCache]: Analyzing trace with hash -980752764, now seen corresponding path program 1 times [2021-07-09 18:39:30,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:30,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220098821] [2021-07-09 18:39:30,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:30,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:31,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:31,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:31,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220098821] [2021-07-09 18:39:31,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220098821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:31,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065587101] [2021-07-09 18:39:31,013 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 [2021-07-09 18:39:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:31,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:39:31,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:31,234 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 [2021-07-09 18:39:31,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:31,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:31,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:39:31,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:20 [2021-07-09 18:39:31,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:31,293 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 [2021-07-09 18:39:31,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:31,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:31,305 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. [2021-07-09 18:39:31,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:27 [2021-07-09 18:39:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:31,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065587101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:31,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:31,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 18:39:31,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928672783] [2021-07-09 18:39:31,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:39:31,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:31,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:39:31,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:39:31,375 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) [2021-07-09 18:39:31,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:31,854 INFO L93 Difference]: Finished difference Result 853 states and 2545 transitions. [2021-07-09 18:39:31,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:39:31,854 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 [2021-07-09 18:39:31,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:31,858 INFO L225 Difference]: With dead ends: 853 [2021-07-09 18:39:31,858 INFO L226 Difference]: Without dead ends: 766 [2021-07-09 18:39:31,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 649.4ms TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:39:31,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-07-09 18:39:31,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 490. [2021-07-09 18:39:31,876 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) [2021-07-09 18:39:31,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1573 transitions. [2021-07-09 18:39:31,878 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1573 transitions. Word has length 28 [2021-07-09 18:39:31,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:31,878 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1573 transitions. [2021-07-09 18:39:31,878 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) [2021-07-09 18:39:31,878 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1573 transitions. [2021-07-09 18:39:31,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:31,879 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:31,879 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] [2021-07-09 18:39:32,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:32,093 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:32,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:32,093 INFO L82 PathProgramCache]: Analyzing trace with hash 735427332, now seen corresponding path program 2 times [2021-07-09 18:39:32,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:32,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930724603] [2021-07-09 18:39:32,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:32,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:32,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:32,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930724603] [2021-07-09 18:39:32,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930724603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:32,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379435038] [2021-07-09 18:39:32,475 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 [2021-07-09 18:39:32,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:39:32,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:32,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:39:32,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:32,611 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 [2021-07-09 18:39:32,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:32,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:32,623 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. [2021-07-09 18:39:32,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-07-09 18:39:32,719 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-07-09 18:39:32,720 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 [2021-07-09 18:39:32,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:32,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:32,732 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. [2021-07-09 18:39:32,732 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:29 [2021-07-09 18:39:32,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:39:32,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379435038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:32,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:32,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-07-09 18:39:32,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501679957] [2021-07-09 18:39:32,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:39:32,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:32,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:39:32,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:39:32,832 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) [2021-07-09 18:39:34,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:34,415 INFO L93 Difference]: Finished difference Result 1130 states and 3345 transitions. [2021-07-09 18:39:34,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:39:34,415 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 [2021-07-09 18:39:34,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:34,419 INFO L225 Difference]: With dead ends: 1130 [2021-07-09 18:39:34,419 INFO L226 Difference]: Without dead ends: 998 [2021-07-09 18:39:34,420 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1492.8ms TimeCoverageRelationStatistics Valid=417, Invalid=2235, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:39:34,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-07-09 18:39:34,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 537. [2021-07-09 18:39:34,432 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) [2021-07-09 18:39:34,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1712 transitions. [2021-07-09 18:39:34,434 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1712 transitions. Word has length 28 [2021-07-09 18:39:34,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:34,434 INFO L482 AbstractCegarLoop]: Abstraction has 537 states and 1712 transitions. [2021-07-09 18:39:34,434 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) [2021-07-09 18:39:34,434 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1712 transitions. [2021-07-09 18:39:34,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:34,436 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:34,436 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] [2021-07-09 18:39:34,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 18:39:34,649 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:34,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:34,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1417721472, now seen corresponding path program 14 times [2021-07-09 18:39:34,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:34,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537248847] [2021-07-09 18:39:34,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:34,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:35,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:35,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537248847] [2021-07-09 18:39:35,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537248847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:35,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048058419] [2021-07-09 18:39:35,081 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 [2021-07-09 18:39:35,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:39:35,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:35,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:39:35,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:35,231 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 [2021-07-09 18:39:35,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:35,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:35,242 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. [2021-07-09 18:39:35,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:22 [2021-07-09 18:39:35,296 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-07-09 18:39:35,296 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 [2021-07-09 18:39:35,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:35,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:35,315 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. [2021-07-09 18:39:35,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:34 [2021-07-09 18:39:35,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:39:35,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048058419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:35,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:35,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-07-09 18:39:35,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768891152] [2021-07-09 18:39:35,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:39:35,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:35,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:39:35,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:39:35,429 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) [2021-07-09 18:39:36,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:36,835 INFO L93 Difference]: Finished difference Result 1024 states and 3050 transitions. [2021-07-09 18:39:36,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:39:36,835 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 [2021-07-09 18:39:36,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:36,838 INFO L225 Difference]: With dead ends: 1024 [2021-07-09 18:39:36,838 INFO L226 Difference]: Without dead ends: 946 [2021-07-09 18:39:36,839 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1299.4ms TimeCoverageRelationStatistics Valid=419, Invalid=1837, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:39:36,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-07-09 18:39:36,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 637. [2021-07-09 18:39:36,853 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) [2021-07-09 18:39:36,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1972 transitions. [2021-07-09 18:39:36,855 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1972 transitions. Word has length 28 [2021-07-09 18:39:36,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:36,855 INFO L482 AbstractCegarLoop]: Abstraction has 637 states and 1972 transitions. [2021-07-09 18:39:36,855 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) [2021-07-09 18:39:36,855 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1972 transitions. [2021-07-09 18:39:36,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:36,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:36,857 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] [2021-07-09 18:39:37,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 18:39:37,081 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:37,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:37,082 INFO L82 PathProgramCache]: Analyzing trace with hash 916230348, now seen corresponding path program 3 times [2021-07-09 18:39:37,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:37,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272006750] [2021-07-09 18:39:37,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:37,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:37,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:37,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272006750] [2021-07-09 18:39:37,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272006750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:37,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990587104] [2021-07-09 18:39:37,382 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 [2021-07-09 18:39:37,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:39:37,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:37,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:39:37,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:37,519 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 [2021-07-09 18:39:37,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:37,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:37,529 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. [2021-07-09 18:39:37,529 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-07-09 18:39:37,595 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-07-09 18:39:37,595 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 [2021-07-09 18:39:37,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:37,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:37,609 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. [2021-07-09 18:39:37,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:37 [2021-07-09 18:39:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:39:37,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990587104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:37,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:37,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-07-09 18:39:37,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006648858] [2021-07-09 18:39:37,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:39:37,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:37,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:39:37,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:39:37,781 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) [2021-07-09 18:39:40,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:40,302 INFO L93 Difference]: Finished difference Result 1838 states and 5313 transitions. [2021-07-09 18:39:40,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:39:40,302 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 [2021-07-09 18:39:40,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:40,307 INFO L225 Difference]: With dead ends: 1838 [2021-07-09 18:39:40,307 INFO L226 Difference]: Without dead ends: 1655 [2021-07-09 18:39:40,308 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 2035.4ms TimeCoverageRelationStatistics Valid=569, Invalid=3091, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:39:40,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2021-07-09 18:39:40,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 692. [2021-07-09 18:39:40,326 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) [2021-07-09 18:39:40,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2182 transitions. [2021-07-09 18:39:40,328 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2182 transitions. Word has length 28 [2021-07-09 18:39:40,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:40,328 INFO L482 AbstractCegarLoop]: Abstraction has 692 states and 2182 transitions. [2021-07-09 18:39:40,329 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) [2021-07-09 18:39:40,329 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2182 transitions. [2021-07-09 18:39:40,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:40,330 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:40,330 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] [2021-07-09 18:39:40,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:40,545 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:40,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:40,545 INFO L82 PathProgramCache]: Analyzing trace with hash 937707268, now seen corresponding path program 15 times [2021-07-09 18:39:40,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:40,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900853437] [2021-07-09 18:39:40,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:40,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:40,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:40,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:40,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900853437] [2021-07-09 18:39:40,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900853437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:40,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279304650] [2021-07-09 18:39:40,899 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 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 [2021-07-09 18:39:40,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:39:40,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:40,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:39:40,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:41,022 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 [2021-07-09 18:39:41,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:41,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:41,034 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. [2021-07-09 18:39:41,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-07-09 18:39:41,129 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-07-09 18:39:41,129 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 [2021-07-09 18:39:41,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:41,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:41,145 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. [2021-07-09 18:39:41,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:34 [2021-07-09 18:39:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:39:41,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279304650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:41,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:41,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-07-09 18:39:41,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263148603] [2021-07-09 18:39:41,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:39:41,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:41,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:39:41,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:39:41,269 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) [2021-07-09 18:39:42,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:42,761 INFO L93 Difference]: Finished difference Result 1136 states and 3439 transitions. [2021-07-09 18:39:42,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:39:42,762 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 [2021-07-09 18:39:42,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:42,765 INFO L225 Difference]: With dead ends: 1136 [2021-07-09 18:39:42,765 INFO L226 Difference]: Without dead ends: 1058 [2021-07-09 18:39:42,766 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1384.5ms TimeCoverageRelationStatistics Valid=406, Invalid=2044, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:39:42,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-07-09 18:39:42,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 680. [2021-07-09 18:39:42,780 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) [2021-07-09 18:39:42,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 2154 transitions. [2021-07-09 18:39:42,781 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 2154 transitions. Word has length 28 [2021-07-09 18:39:42,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:42,782 INFO L482 AbstractCegarLoop]: Abstraction has 680 states and 2154 transitions. [2021-07-09 18:39:42,782 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) [2021-07-09 18:39:42,782 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 2154 transitions. [2021-07-09 18:39:42,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:42,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:42,783 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] [2021-07-09 18:39:42,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:42,984 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:42,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:42,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1490293068, now seen corresponding path program 16 times [2021-07-09 18:39:42,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:42,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939477371] [2021-07-09 18:39:42,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:42,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:43,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:43,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939477371] [2021-07-09 18:39:43,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939477371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:43,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423136] [2021-07-09 18:39:43,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:43,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:39:43,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:43,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:39:43,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:43,528 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 [2021-07-09 18:39:43,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:43,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:43,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:39:43,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2021-07-09 18:39:43,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:43,593 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 [2021-07-09 18:39:43,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:43,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:43,603 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. [2021-07-09 18:39:43,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:31 [2021-07-09 18:39:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:43,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:43,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:43,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2021-07-09 18:39:43,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929680956] [2021-07-09 18:39:43,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:39:43,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:43,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:39:43,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:39:43,680 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) [2021-07-09 18:39:45,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:45,986 INFO L93 Difference]: Finished difference Result 1629 states and 4937 transitions. [2021-07-09 18:39:45,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:39:45,986 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 [2021-07-09 18:39:45,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:45,990 INFO L225 Difference]: With dead ends: 1629 [2021-07-09 18:39:45,990 INFO L226 Difference]: Without dead ends: 1293 [2021-07-09 18:39:45,992 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 2107.1ms TimeCoverageRelationStatistics Valid=735, Invalid=3425, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:39:45,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2021-07-09 18:39:46,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 920. [2021-07-09 18:39:46,012 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) [2021-07-09 18:39:46,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 2999 transitions. [2021-07-09 18:39:46,015 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 2999 transitions. Word has length 28 [2021-07-09 18:39:46,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:46,015 INFO L482 AbstractCegarLoop]: Abstraction has 920 states and 2999 transitions. [2021-07-09 18:39:46,015 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) [2021-07-09 18:39:46,015 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2999 transitions. [2021-07-09 18:39:46,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:46,017 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:46,017 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] [2021-07-09 18:39:46,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:46,241 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:46,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:46,241 INFO L82 PathProgramCache]: Analyzing trace with hash -836691140, now seen corresponding path program 4 times [2021-07-09 18:39:46,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:46,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585448821] [2021-07-09 18:39:46,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:46,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:46,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:46,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:46,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585448821] [2021-07-09 18:39:46,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585448821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:46,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042590284] [2021-07-09 18:39:46,662 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 [2021-07-09 18:39:46,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:39:46,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:46,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:39:46,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:46,796 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 [2021-07-09 18:39:46,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:46,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:46,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:39:46,806 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:20 [2021-07-09 18:39:46,887 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-07-09 18:39:46,887 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 [2021-07-09 18:39:46,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:46,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:46,897 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. [2021-07-09 18:39:46,897 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:29 [2021-07-09 18:39:47,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:39:47,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042590284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:47,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:47,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-07-09 18:39:47,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395871969] [2021-07-09 18:39:47,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:39:47,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:47,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:39:47,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:39:47,012 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) [2021-07-09 18:39:48,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:48,387 INFO L93 Difference]: Finished difference Result 1908 states and 5865 transitions. [2021-07-09 18:39:48,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:39:48,388 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 [2021-07-09 18:39:48,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:48,392 INFO L225 Difference]: With dead ends: 1908 [2021-07-09 18:39:48,392 INFO L226 Difference]: Without dead ends: 1792 [2021-07-09 18:39:48,392 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1435.9ms TimeCoverageRelationStatistics Valid=320, Invalid=1402, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:39:48,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2021-07-09 18:39:48,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1049. [2021-07-09 18:39:48,415 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) [2021-07-09 18:39:48,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 3410 transitions. [2021-07-09 18:39:48,418 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 3410 transitions. Word has length 28 [2021-07-09 18:39:48,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:48,419 INFO L482 AbstractCegarLoop]: Abstraction has 1049 states and 3410 transitions. [2021-07-09 18:39:48,419 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) [2021-07-09 18:39:48,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 3410 transitions. [2021-07-09 18:39:48,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:48,421 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:48,421 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] [2021-07-09 18:39:48,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-09 18:39:48,637 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:48,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:48,637 INFO L82 PathProgramCache]: Analyzing trace with hash -556203584, now seen corresponding path program 5 times [2021-07-09 18:39:48,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:48,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619418523] [2021-07-09 18:39:48,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:48,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:48,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:48,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:48,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619418523] [2021-07-09 18:39:48,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619418523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:48,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108082742] [2021-07-09 18:39:48,895 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 [2021-07-09 18:39:48,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:39:48,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:48,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:39:48,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:49,017 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 [2021-07-09 18:39:49,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:49,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:49,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:39:49,026 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-07-09 18:39:49,080 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-07-09 18:39:49,080 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 [2021-07-09 18:39:49,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:49,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:49,092 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. [2021-07-09 18:39:49,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:32 [2021-07-09 18:39:49,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:49,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108082742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:49,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:49,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 18:39:49,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350068511] [2021-07-09 18:39:49,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:39:49,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:49,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:39:49,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:39:49,236 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) [2021-07-09 18:39:51,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:51,482 INFO L93 Difference]: Finished difference Result 1982 states and 6072 transitions. [2021-07-09 18:39:51,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:39:51,483 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 [2021-07-09 18:39:51,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:51,487 INFO L225 Difference]: With dead ends: 1982 [2021-07-09 18:39:51,487 INFO L226 Difference]: Without dead ends: 1756 [2021-07-09 18:39:51,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1935.3ms TimeCoverageRelationStatistics Valid=554, Invalid=2416, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:39:51,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2021-07-09 18:39:51,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1070. [2021-07-09 18:39:51,531 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) [2021-07-09 18:39:51,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 3442 transitions. [2021-07-09 18:39:51,535 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 3442 transitions. Word has length 28 [2021-07-09 18:39:51,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:51,536 INFO L482 AbstractCegarLoop]: Abstraction has 1070 states and 3442 transitions. [2021-07-09 18:39:51,536 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) [2021-07-09 18:39:51,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 3442 transitions. [2021-07-09 18:39:51,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:51,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:51,538 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] [2021-07-09 18:39:51,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 18:39:51,739 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:51,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:51,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1520630964, now seen corresponding path program 6 times [2021-07-09 18:39:51,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:51,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316779588] [2021-07-09 18:39:51,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:51,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:52,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:52,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:52,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316779588] [2021-07-09 18:39:52,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316779588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:52,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858526099] [2021-07-09 18:39:52,161 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 [2021-07-09 18:39:52,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:39:52,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:52,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:39:52,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:52,296 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 [2021-07-09 18:39:52,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:52,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:52,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:39:52,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:23 [2021-07-09 18:39:52,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:52,340 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 [2021-07-09 18:39:52,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:52,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:52,351 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. [2021-07-09 18:39:52,351 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-07-09 18:39:52,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:52,433 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-07-09 18:39:52,433 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 [2021-07-09 18:39:52,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:52,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:52,448 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. [2021-07-09 18:39:52,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:42 [2021-07-09 18:39:52,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:52,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858526099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:52,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:52,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-07-09 18:39:52,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100173979] [2021-07-09 18:39:52,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:39:52,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:52,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:39:52,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:39:52,658 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) [2021-07-09 18:39:54,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:54,452 INFO L93 Difference]: Finished difference Result 2007 states and 6151 transitions. [2021-07-09 18:39:54,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:39:54,453 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 [2021-07-09 18:39:54,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:54,459 INFO L225 Difference]: With dead ends: 2007 [2021-07-09 18:39:54,459 INFO L226 Difference]: Without dead ends: 1842 [2021-07-09 18:39:54,460 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1563.1ms TimeCoverageRelationStatistics Valid=307, Invalid=2045, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:39:54,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2021-07-09 18:39:54,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 1157. [2021-07-09 18:39:54,488 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) [2021-07-09 18:39:54,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 3725 transitions. [2021-07-09 18:39:54,492 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 3725 transitions. Word has length 28 [2021-07-09 18:39:54,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:54,492 INFO L482 AbstractCegarLoop]: Abstraction has 1157 states and 3725 transitions. [2021-07-09 18:39:54,492 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) [2021-07-09 18:39:54,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 3725 transitions. [2021-07-09 18:39:54,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:54,495 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:54,495 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] [2021-07-09 18:39:54,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:54,709 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:54,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:54,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1530790852, now seen corresponding path program 7 times [2021-07-09 18:39:54,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:54,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952356057] [2021-07-09 18:39:54,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:54,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:55,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:55,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:55,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952356057] [2021-07-09 18:39:55,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952356057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:55,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073511197] [2021-07-09 18:39:55,116 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 [2021-07-09 18:39:55,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:55,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:39:55,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:55,265 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 [2021-07-09 18:39:55,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:55,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:55,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:39:55,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-07-09 18:39:55,307 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-07-09 18:39:55,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-07-09 18:39:55,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:55,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:55,319 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. [2021-07-09 18:39:55,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:37 [2021-07-09 18:39:55,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:55,371 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-07-09 18:39:55,371 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 [2021-07-09 18:39:55,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:55,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:55,387 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. [2021-07-09 18:39:55,387 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:44 [2021-07-09 18:39:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:55,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073511197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:55,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:55,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 18:39:55,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681193701] [2021-07-09 18:39:55,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:39:55,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:55,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:39:55,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:39:55,556 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) [2021-07-09 18:39:56,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:56,324 INFO L93 Difference]: Finished difference Result 2244 states and 7072 transitions. [2021-07-09 18:39:56,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:39:56,324 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 [2021-07-09 18:39:56,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:56,329 INFO L225 Difference]: With dead ends: 2244 [2021-07-09 18:39:56,329 INFO L226 Difference]: Without dead ends: 1887 [2021-07-09 18:39:56,330 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 911.7ms TimeCoverageRelationStatistics Valid=247, Invalid=1085, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:39:56,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1887 states. [2021-07-09 18:39:56,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1887 to 1173. [2021-07-09 18:39:56,354 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) [2021-07-09 18:39:56,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 3795 transitions. [2021-07-09 18:39:56,357 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 3795 transitions. Word has length 28 [2021-07-09 18:39:56,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:56,358 INFO L482 AbstractCegarLoop]: Abstraction has 1173 states and 3795 transitions. [2021-07-09 18:39:56,358 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) [2021-07-09 18:39:56,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 3795 transitions. [2021-07-09 18:39:56,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:56,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:56,360 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] [2021-07-09 18:39:56,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-09 18:39:56,577 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:56,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:56,577 INFO L82 PathProgramCache]: Analyzing trace with hash 55569732, now seen corresponding path program 8 times [2021-07-09 18:39:56,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:56,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210368101] [2021-07-09 18:39:56,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:56,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:57,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:57,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:57,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210368101] [2021-07-09 18:39:57,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210368101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:57,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657449627] [2021-07-09 18:39:57,028 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 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 [2021-07-09 18:39:57,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:39:57,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:57,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:39:57,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:57,140 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 [2021-07-09 18:39:57,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:57,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:57,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:39:57,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-07-09 18:39:57,191 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-07-09 18:39:57,191 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 [2021-07-09 18:39:57,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:57,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:57,202 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. [2021-07-09 18:39:57,202 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:29 [2021-07-09 18:39:57,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:57,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657449627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:57,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:57,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2021-07-09 18:39:57,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191885601] [2021-07-09 18:39:57,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:39:57,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:57,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:39:57,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:39:57,312 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) [2021-07-09 18:39:57,675 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 36 [2021-07-09 18:39:58,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:58,030 INFO L93 Difference]: Finished difference Result 2027 states and 6489 transitions. [2021-07-09 18:39:58,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:39:58,030 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 [2021-07-09 18:39:58,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:58,034 INFO L225 Difference]: With dead ends: 2027 [2021-07-09 18:39:58,034 INFO L226 Difference]: Without dead ends: 1705 [2021-07-09 18:39:58,034 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 893.6ms TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:39:58,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-07-09 18:39:58,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1135. [2021-07-09 18:39:58,052 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) [2021-07-09 18:39:58,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 3670 transitions. [2021-07-09 18:39:58,055 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 3670 transitions. Word has length 28 [2021-07-09 18:39:58,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:58,055 INFO L482 AbstractCegarLoop]: Abstraction has 1135 states and 3670 transitions. [2021-07-09 18:39:58,055 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) [2021-07-09 18:39:58,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 3670 transitions. [2021-07-09 18:39:58,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:39:58,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:58,057 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] [2021-07-09 18:39:58,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:58,273 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:58,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:58,273 INFO L82 PathProgramCache]: Analyzing trace with hash 915430826, now seen corresponding path program 9 times [2021-07-09 18:39:58,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:58,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764389585] [2021-07-09 18:39:58,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:58,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:58,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:58,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764389585] [2021-07-09 18:39:58,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764389585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:58,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665273939] [2021-07-09 18:39:58,329 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 [2021-07-09 18:39:58,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:39:58,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:58,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:39:58,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:58,483 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:39:58,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665273939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:58,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:58,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:39:58,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235470750] [2021-07-09 18:39:58,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:39:58,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:58,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:39:58,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:39:58,484 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) [2021-07-09 18:39:59,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:59,793 INFO L93 Difference]: Finished difference Result 5166 states and 15294 transitions. [2021-07-09 18:39:59,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-09 18:39:59,794 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 [2021-07-09 18:39:59,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:59,802 INFO L225 Difference]: With dead ends: 5166 [2021-07-09 18:39:59,802 INFO L226 Difference]: Without dead ends: 5166 [2021-07-09 18:39:59,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2985 ImplicationChecksByTransitivity, 884.6ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-07-09 18:39:59,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5166 states. [2021-07-09 18:39:59,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5166 to 1295. [2021-07-09 18:39:59,847 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) [2021-07-09 18:39:59,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 4319 transitions. [2021-07-09 18:39:59,850 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 4319 transitions. Word has length 30 [2021-07-09 18:39:59,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:59,850 INFO L482 AbstractCegarLoop]: Abstraction has 1295 states and 4319 transitions. [2021-07-09 18:39:59,850 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) [2021-07-09 18:39:59,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 4319 transitions. [2021-07-09 18:39:59,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:39:59,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:59,852 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] [2021-07-09 18:40:00,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 18:40:00,053 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:00,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:00,053 INFO L82 PathProgramCache]: Analyzing trace with hash 930891622, now seen corresponding path program 10 times [2021-07-09 18:40:00,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:00,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948754159] [2021-07-09 18:40:00,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:00,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:00,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:00,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:00,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948754159] [2021-07-09 18:40:00,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948754159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:00,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008151324] [2021-07-09 18:40:00,106 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 [2021-07-09 18:40:00,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:00,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:00,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:00,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:00,268 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:00,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008151324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:00,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:00,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:40:00,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372887999] [2021-07-09 18:40:00,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:40:00,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:00,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:40:00,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:40:00,271 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) [2021-07-09 18:40:01,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:01,762 INFO L93 Difference]: Finished difference Result 5273 states and 15409 transitions. [2021-07-09 18:40:01,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-09 18:40:01,764 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 [2021-07-09 18:40:01,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:01,773 INFO L225 Difference]: With dead ends: 5273 [2021-07-09 18:40:01,773 INFO L226 Difference]: Without dead ends: 5273 [2021-07-09 18:40:01,774 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3083 ImplicationChecksByTransitivity, 992.0ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-07-09 18:40:01,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5273 states. [2021-07-09 18:40:01,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5273 to 1261. [2021-07-09 18:40:01,830 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) [2021-07-09 18:40:01,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 4173 transitions. [2021-07-09 18:40:01,834 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 4173 transitions. Word has length 30 [2021-07-09 18:40:01,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:01,834 INFO L482 AbstractCegarLoop]: Abstraction has 1261 states and 4173 transitions. [2021-07-09 18:40:01,834 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) [2021-07-09 18:40:01,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 4173 transitions. [2021-07-09 18:40:01,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:40:01,837 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:01,837 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] [2021-07-09 18:40:02,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-09 18:40:02,037 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:02,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:02,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1624165858, now seen corresponding path program 11 times [2021-07-09 18:40:02,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:02,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523504383] [2021-07-09 18:40:02,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:02,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:02,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:02,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:02,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523504383] [2021-07-09 18:40:02,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523504383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:02,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871922715] [2021-07-09 18:40:02,092 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 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 [2021-07-09 18:40:02,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:40:02,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:02,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:02,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:02,246 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:02,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871922715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:02,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:02,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:40:02,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163558633] [2021-07-09 18:40:02,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:40:02,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:02,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:40:02,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:40:02,247 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) [2021-07-09 18:40:03,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:03,156 INFO L93 Difference]: Finished difference Result 3862 states and 11266 transitions. [2021-07-09 18:40:03,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:40:03,156 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 [2021-07-09 18:40:03,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:03,162 INFO L225 Difference]: With dead ends: 3862 [2021-07-09 18:40:03,163 INFO L226 Difference]: Without dead ends: 3862 [2021-07-09 18:40:03,163 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 563.2ms TimeCoverageRelationStatistics Valid=747, Invalid=2793, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:40:03,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2021-07-09 18:40:03,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 1267. [2021-07-09 18:40:03,194 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) [2021-07-09 18:40:03,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 4196 transitions. [2021-07-09 18:40:03,197 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 4196 transitions. Word has length 30 [2021-07-09 18:40:03,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:03,197 INFO L482 AbstractCegarLoop]: Abstraction has 1267 states and 4196 transitions. [2021-07-09 18:40:03,197 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) [2021-07-09 18:40:03,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 4196 transitions. [2021-07-09 18:40:03,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:40:03,199 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:03,199 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] [2021-07-09 18:40:03,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 18:40:03,400 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:03,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:03,400 INFO L82 PathProgramCache]: Analyzing trace with hash 568788464, now seen corresponding path program 12 times [2021-07-09 18:40:03,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:03,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738747113] [2021-07-09 18:40:03,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:03,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:03,440 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:03,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:03,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738747113] [2021-07-09 18:40:03,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738747113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:03,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240274220] [2021-07-09 18:40:03,441 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 [2021-07-09 18:40:03,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:40:03,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:03,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:03,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:03,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:03,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240274220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:03,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:03,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:40:03,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265196888] [2021-07-09 18:40:03,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:40:03,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:03,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:40:03,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:40:03,567 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) [2021-07-09 18:40:04,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:04,374 INFO L93 Difference]: Finished difference Result 3689 states and 10863 transitions. [2021-07-09 18:40:04,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:40:04,375 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 [2021-07-09 18:40:04,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:04,381 INFO L225 Difference]: With dead ends: 3689 [2021-07-09 18:40:04,381 INFO L226 Difference]: Without dead ends: 3673 [2021-07-09 18:40:04,382 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 480.5ms TimeCoverageRelationStatistics Valid=710, Invalid=2482, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:40:04,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3673 states. [2021-07-09 18:40:04,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3673 to 1255. [2021-07-09 18:40:04,408 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) [2021-07-09 18:40:04,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 4143 transitions. [2021-07-09 18:40:04,411 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 4143 transitions. Word has length 30 [2021-07-09 18:40:04,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:04,411 INFO L482 AbstractCegarLoop]: Abstraction has 1255 states and 4143 transitions. [2021-07-09 18:40:04,411 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) [2021-07-09 18:40:04,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 4143 transitions. [2021-07-09 18:40:04,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:40:04,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:04,413 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] [2021-07-09 18:40:04,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:04,614 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:04,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:04,615 INFO L82 PathProgramCache]: Analyzing trace with hash -707538508, now seen corresponding path program 13 times [2021-07-09 18:40:04,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:04,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032263799] [2021-07-09 18:40:04,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:04,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:04,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:04,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:04,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032263799] [2021-07-09 18:40:04,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032263799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:04,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166750143] [2021-07-09 18:40:04,667 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 [2021-07-09 18:40:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:04,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:04,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:04,806 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:04,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166750143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:04,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:04,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:40:04,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117044848] [2021-07-09 18:40:04,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:04,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:04,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:04,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:04,808 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) [2021-07-09 18:40:05,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:05,681 INFO L93 Difference]: Finished difference Result 4077 states and 11802 transitions. [2021-07-09 18:40:05,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:40:05,681 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 [2021-07-09 18:40:05,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:05,687 INFO L225 Difference]: With dead ends: 4077 [2021-07-09 18:40:05,688 INFO L226 Difference]: Without dead ends: 4053 [2021-07-09 18:40:05,688 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 514.3ms TimeCoverageRelationStatistics Valid=680, Invalid=2400, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:40:05,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4053 states. [2021-07-09 18:40:05,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4053 to 1269. [2021-07-09 18:40:05,719 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) [2021-07-09 18:40:05,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 4182 transitions. [2021-07-09 18:40:05,721 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 4182 transitions. Word has length 30 [2021-07-09 18:40:05,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:05,721 INFO L482 AbstractCegarLoop]: Abstraction has 1269 states and 4182 transitions. [2021-07-09 18:40:05,721 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) [2021-07-09 18:40:05,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 4182 transitions. [2021-07-09 18:40:05,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:40:05,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:05,723 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] [2021-07-09 18:40:05,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-09 18:40:05,924 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:05,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:05,924 INFO L82 PathProgramCache]: Analyzing trace with hash -437028816, now seen corresponding path program 14 times [2021-07-09 18:40:05,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:05,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016690117] [2021-07-09 18:40:05,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:05,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:05,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:05,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:05,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016690117] [2021-07-09 18:40:05,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016690117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:05,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550628624] [2021-07-09 18:40:05,964 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 [2021-07-09 18:40:06,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:06,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:06,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:06,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:06,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:06,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550628624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:06,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:06,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:40:06,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114068531] [2021-07-09 18:40:06,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:06,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:06,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:06,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:06,177 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) [2021-07-09 18:40:07,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:07,038 INFO L93 Difference]: Finished difference Result 4229 states and 12165 transitions. [2021-07-09 18:40:07,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 18:40:07,038 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 [2021-07-09 18:40:07,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:07,045 INFO L225 Difference]: With dead ends: 4229 [2021-07-09 18:40:07,045 INFO L226 Difference]: Without dead ends: 4229 [2021-07-09 18:40:07,046 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 502.8ms TimeCoverageRelationStatistics Valid=757, Invalid=2783, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:40:07,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4229 states. [2021-07-09 18:40:07,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4229 to 1092. [2021-07-09 18:40:07,086 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) [2021-07-09 18:40:07,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 3451 transitions. [2021-07-09 18:40:07,089 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 3451 transitions. Word has length 30 [2021-07-09 18:40:07,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:07,089 INFO L482 AbstractCegarLoop]: Abstraction has 1092 states and 3451 transitions. [2021-07-09 18:40:07,089 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) [2021-07-09 18:40:07,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 3451 transitions. [2021-07-09 18:40:07,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:40:07,091 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:07,091 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] [2021-07-09 18:40:07,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:07,312 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:07,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:07,312 INFO L82 PathProgramCache]: Analyzing trace with hash 333072554, now seen corresponding path program 15 times [2021-07-09 18:40:07,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:07,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596092235] [2021-07-09 18:40:07,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:07,359 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:07,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:07,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596092235] [2021-07-09 18:40:07,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596092235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:07,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524549786] [2021-07-09 18:40:07,360 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 [2021-07-09 18:40:07,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:40:07,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:07,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:07,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:07,481 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:07,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524549786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:07,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:07,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:40:07,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669802956] [2021-07-09 18:40:07,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:40:07,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:07,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:40:07,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:40:07,483 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) [2021-07-09 18:40:08,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:08,416 INFO L93 Difference]: Finished difference Result 3880 states and 11526 transitions. [2021-07-09 18:40:08,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:40:08,416 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 [2021-07-09 18:40:08,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:08,422 INFO L225 Difference]: With dead ends: 3880 [2021-07-09 18:40:08,423 INFO L226 Difference]: Without dead ends: 3880 [2021-07-09 18:40:08,423 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 597.4ms TimeCoverageRelationStatistics Valid=788, Invalid=3244, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:40:08,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3880 states. [2021-07-09 18:40:08,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3880 to 1361. [2021-07-09 18:40:08,464 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) [2021-07-09 18:40:08,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 4425 transitions. [2021-07-09 18:40:08,467 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 4425 transitions. Word has length 30 [2021-07-09 18:40:08,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:08,468 INFO L482 AbstractCegarLoop]: Abstraction has 1361 states and 4425 transitions. [2021-07-09 18:40:08,468 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) [2021-07-09 18:40:08,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 4425 transitions. [2021-07-09 18:40:08,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:40:08,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:08,470 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] [2021-07-09 18:40:08,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-09 18:40:08,694 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:08,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:08,694 INFO L82 PathProgramCache]: Analyzing trace with hash -722304840, now seen corresponding path program 16 times [2021-07-09 18:40:08,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:08,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468591443] [2021-07-09 18:40:08,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:08,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:08,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:08,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:08,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468591443] [2021-07-09 18:40:08,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468591443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:08,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012273795] [2021-07-09 18:40:08,737 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 [2021-07-09 18:40:08,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:08,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:08,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:08,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:08,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012273795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:08,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:08,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:40:08,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426720676] [2021-07-09 18:40:08,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:40:08,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:08,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:40:08,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:40:08,865 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) [2021-07-09 18:40:09,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:09,649 INFO L93 Difference]: Finished difference Result 3700 states and 11089 transitions. [2021-07-09 18:40:09,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 18:40:09,650 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 [2021-07-09 18:40:09,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:09,656 INFO L225 Difference]: With dead ends: 3700 [2021-07-09 18:40:09,656 INFO L226 Difference]: Without dead ends: 3684 [2021-07-09 18:40:09,656 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 514.0ms TimeCoverageRelationStatistics Valid=675, Invalid=2517, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:40:09,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3684 states. [2021-07-09 18:40:09,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3684 to 1355. [2021-07-09 18:40:09,680 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) [2021-07-09 18:40:09,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 4402 transitions. [2021-07-09 18:40:09,684 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 4402 transitions. Word has length 30 [2021-07-09 18:40:09,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:09,684 INFO L482 AbstractCegarLoop]: Abstraction has 1355 states and 4402 transitions. [2021-07-09 18:40:09,684 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) [2021-07-09 18:40:09,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 4402 transitions. [2021-07-09 18:40:09,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:40:09,687 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:09,687 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] [2021-07-09 18:40:09,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-09 18:40:09,901 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:09,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:09,901 INFO L82 PathProgramCache]: Analyzing trace with hash 760830098, now seen corresponding path program 17 times [2021-07-09 18:40:09,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:09,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179028438] [2021-07-09 18:40:09,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:09,942 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:09,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:09,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179028438] [2021-07-09 18:40:09,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179028438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:09,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710974744] [2021-07-09 18:40:09,942 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 [2021-07-09 18:40:09,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:40:09,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:09,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:09,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:10,077 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:10,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710974744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:10,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:10,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:40:10,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351881067] [2021-07-09 18:40:10,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:10,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:10,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:10,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:10,078 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) [2021-07-09 18:40:10,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:10,781 INFO L93 Difference]: Finished difference Result 3586 states and 10726 transitions. [2021-07-09 18:40:10,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:40:10,781 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 [2021-07-09 18:40:10,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:10,787 INFO L225 Difference]: With dead ends: 3586 [2021-07-09 18:40:10,787 INFO L226 Difference]: Without dead ends: 3538 [2021-07-09 18:40:10,788 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 449.6ms TimeCoverageRelationStatistics Valid=596, Invalid=2160, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:40:10,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3538 states. [2021-07-09 18:40:10,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3538 to 1367. [2021-07-09 18:40:10,814 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) [2021-07-09 18:40:10,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 4429 transitions. [2021-07-09 18:40:10,816 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 4429 transitions. Word has length 30 [2021-07-09 18:40:10,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:10,817 INFO L482 AbstractCegarLoop]: Abstraction has 1367 states and 4429 transitions. [2021-07-09 18:40:10,817 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) [2021-07-09 18:40:10,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 4429 transitions. [2021-07-09 18:40:10,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:40:10,819 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:10,819 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] [2021-07-09 18:40:11,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 18:40:11,019 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:11,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:11,020 INFO L82 PathProgramCache]: Analyzing trace with hash -150600370, now seen corresponding path program 18 times [2021-07-09 18:40:11,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:11,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782323922] [2021-07-09 18:40:11,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:11,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:11,056 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:11,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:11,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782323922] [2021-07-09 18:40:11,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782323922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:11,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344583591] [2021-07-09 18:40:11,056 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 [2021-07-09 18:40:11,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:40:11,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:11,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:11,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:11,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:11,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344583591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:11,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:11,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:40:11,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160627061] [2021-07-09 18:40:11,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:40:11,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:11,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:40:11,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:40:11,185 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) [2021-07-09 18:40:11,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:11,857 INFO L93 Difference]: Finished difference Result 3947 states and 11608 transitions. [2021-07-09 18:40:11,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:40:11,858 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 [2021-07-09 18:40:11,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:11,865 INFO L225 Difference]: With dead ends: 3947 [2021-07-09 18:40:11,865 INFO L226 Difference]: Without dead ends: 3871 [2021-07-09 18:40:11,865 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 430.1ms TimeCoverageRelationStatistics Valid=584, Invalid=2172, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:40:11,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3871 states. [2021-07-09 18:40:11,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3871 to 1381. [2021-07-09 18:40:11,901 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) [2021-07-09 18:40:11,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 4472 transitions. [2021-07-09 18:40:11,905 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 4472 transitions. Word has length 30 [2021-07-09 18:40:11,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:11,905 INFO L482 AbstractCegarLoop]: Abstraction has 1381 states and 4472 transitions. [2021-07-09 18:40:11,905 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) [2021-07-09 18:40:11,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 4472 transitions. [2021-07-09 18:40:11,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:40:11,908 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:11,908 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] [2021-07-09 18:40:12,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-09 18:40:12,129 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:12,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:12,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1642605102, now seen corresponding path program 19 times [2021-07-09 18:40:12,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:12,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044841651] [2021-07-09 18:40:12,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:12,182 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:12,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:12,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044841651] [2021-07-09 18:40:12,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044841651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:12,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459301310] [2021-07-09 18:40:12,182 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 [2021-07-09 18:40:12,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:12,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:12,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:12,313 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:12,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459301310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:12,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:12,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:40:12,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389911376] [2021-07-09 18:40:12,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:40:12,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:12,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:40:12,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:40:12,316 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) [2021-07-09 18:40:13,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:13,069 INFO L93 Difference]: Finished difference Result 3759 states and 11296 transitions. [2021-07-09 18:40:13,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:40:13,069 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 [2021-07-09 18:40:13,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:13,076 INFO L225 Difference]: With dead ends: 3759 [2021-07-09 18:40:13,076 INFO L226 Difference]: Without dead ends: 3739 [2021-07-09 18:40:13,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 482.5ms TimeCoverageRelationStatistics Valid=649, Invalid=2431, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:40:13,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2021-07-09 18:40:13,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 1571. [2021-07-09 18:40:13,112 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) [2021-07-09 18:40:13,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 5003 transitions. [2021-07-09 18:40:13,115 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 5003 transitions. Word has length 30 [2021-07-09 18:40:13,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:13,115 INFO L482 AbstractCegarLoop]: Abstraction has 1571 states and 5003 transitions. [2021-07-09 18:40:13,115 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) [2021-07-09 18:40:13,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 5003 transitions. [2021-07-09 18:40:13,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:40:13,118 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:13,118 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] [2021-07-09 18:40:13,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 18:40:13,318 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:13,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:13,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1372095410, now seen corresponding path program 20 times [2021-07-09 18:40:13,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:13,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116932381] [2021-07-09 18:40:13,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:13,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:13,359 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:13,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:13,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116932381] [2021-07-09 18:40:13,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116932381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:13,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591826755] [2021-07-09 18:40:13,359 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 [2021-07-09 18:40:13,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:13,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:13,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:13,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:13,474 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:13,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591826755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:13,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:13,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:40:13,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817820372] [2021-07-09 18:40:13,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:40:13,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:13,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:40:13,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:40:13,475 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) [2021-07-09 18:40:14,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:14,488 INFO L93 Difference]: Finished difference Result 4002 states and 11899 transitions. [2021-07-09 18:40:14,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:40:14,489 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 [2021-07-09 18:40:14,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:14,496 INFO L225 Difference]: With dead ends: 4002 [2021-07-09 18:40:14,496 INFO L226 Difference]: Without dead ends: 4002 [2021-07-09 18:40:14,497 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 649.6ms TimeCoverageRelationStatistics Valid=869, Invalid=3291, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:40:14,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4002 states. [2021-07-09 18:40:14,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4002 to 1386. [2021-07-09 18:40:14,531 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) [2021-07-09 18:40:14,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 4483 transitions. [2021-07-09 18:40:14,535 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 4483 transitions. Word has length 30 [2021-07-09 18:40:14,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:14,535 INFO L482 AbstractCegarLoop]: Abstraction has 1386 states and 4483 transitions. [2021-07-09 18:40:14,535 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) [2021-07-09 18:40:14,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 4483 transitions. [2021-07-09 18:40:14,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:40:14,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:14,538 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] [2021-07-09 18:40:14,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-09 18:40:14,753 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:14,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:14,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1532772694, now seen corresponding path program 21 times [2021-07-09 18:40:14,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:14,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74934665] [2021-07-09 18:40:14,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:14,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:14,819 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:14,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:14,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74934665] [2021-07-09 18:40:14,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74934665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:14,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975494559] [2021-07-09 18:40:14,820 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 [2021-07-09 18:40:14,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:40:14,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:14,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:14,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:14,971 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:14,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975494559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:14,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:14,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:40:14,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422957060] [2021-07-09 18:40:14,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:40:14,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:14,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:40:14,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:40:14,973 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) [2021-07-09 18:40:16,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:16,312 INFO L93 Difference]: Finished difference Result 5413 states and 16415 transitions. [2021-07-09 18:40:16,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-09 18:40:16,313 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 [2021-07-09 18:40:16,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:16,322 INFO L225 Difference]: With dead ends: 5413 [2021-07-09 18:40:16,322 INFO L226 Difference]: Without dead ends: 5413 [2021-07-09 18:40:16,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2469 ImplicationChecksByTransitivity, 913.2ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-07-09 18:40:16,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5413 states. [2021-07-09 18:40:16,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5413 to 1890. [2021-07-09 18:40:16,371 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) [2021-07-09 18:40:16,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 6307 transitions. [2021-07-09 18:40:16,375 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 6307 transitions. Word has length 30 [2021-07-09 18:40:16,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:16,375 INFO L482 AbstractCegarLoop]: Abstraction has 1890 states and 6307 transitions. [2021-07-09 18:40:16,375 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) [2021-07-09 18:40:16,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 6307 transitions. [2021-07-09 18:40:16,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:40:16,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:16,378 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] [2021-07-09 18:40:16,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-09 18:40:16,579 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:16,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:16,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1706817208, now seen corresponding path program 22 times [2021-07-09 18:40:16,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:16,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354118750] [2021-07-09 18:40:16,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:16,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:16,645 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:16,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:16,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354118750] [2021-07-09 18:40:16,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354118750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:16,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116629782] [2021-07-09 18:40:16,646 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 [2021-07-09 18:40:16,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:16,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:16,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:16,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:16,803 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:16,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116629782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:16,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:16,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:40:16,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752377561] [2021-07-09 18:40:16,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:40:16,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:16,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:40:16,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:40:16,804 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) [2021-07-09 18:40:17,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:17,912 INFO L93 Difference]: Finished difference Result 5130 states and 15678 transitions. [2021-07-09 18:40:17,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:40:17,912 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 [2021-07-09 18:40:17,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:17,921 INFO L225 Difference]: With dead ends: 5130 [2021-07-09 18:40:17,922 INFO L226 Difference]: Without dead ends: 5114 [2021-07-09 18:40:17,922 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1694 ImplicationChecksByTransitivity, 749.1ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:40:17,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5114 states. [2021-07-09 18:40:17,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5114 to 1830. [2021-07-09 18:40:17,967 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) [2021-07-09 18:40:17,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 6125 transitions. [2021-07-09 18:40:17,972 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 6125 transitions. Word has length 30 [2021-07-09 18:40:17,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:17,972 INFO L482 AbstractCegarLoop]: Abstraction has 1830 states and 6125 transitions. [2021-07-09 18:40:17,972 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) [2021-07-09 18:40:17,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 6125 transitions. [2021-07-09 18:40:17,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:40:17,976 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:17,976 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] [2021-07-09 18:40:18,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 18:40:18,193 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:18,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:18,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1105015150, now seen corresponding path program 23 times [2021-07-09 18:40:18,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:18,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316543810] [2021-07-09 18:40:18,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:18,237 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:18,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:18,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316543810] [2021-07-09 18:40:18,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316543810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:18,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668885341] [2021-07-09 18:40:18,238 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 [2021-07-09 18:40:18,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:40:18,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:18,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:18,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:18,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668885341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:18,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:18,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:40:18,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837813948] [2021-07-09 18:40:18,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:40:18,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:18,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:40:18,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:40:18,373 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) [2021-07-09 18:40:19,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:19,263 INFO L93 Difference]: Finished difference Result 4815 states and 14976 transitions. [2021-07-09 18:40:19,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:40:19,263 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 [2021-07-09 18:40:19,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:19,272 INFO L225 Difference]: With dead ends: 4815 [2021-07-09 18:40:19,272 INFO L226 Difference]: Without dead ends: 4767 [2021-07-09 18:40:19,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 589.6ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:40:19,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4767 states. [2021-07-09 18:40:19,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4767 to 1882. [2021-07-09 18:40:19,320 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) [2021-07-09 18:40:19,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 6273 transitions. [2021-07-09 18:40:19,324 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 6273 transitions. Word has length 30 [2021-07-09 18:40:19,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:19,324 INFO L482 AbstractCegarLoop]: Abstraction has 1882 states and 6273 transitions. [2021-07-09 18:40:19,324 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) [2021-07-09 18:40:19,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 6273 transitions. [2021-07-09 18:40:19,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:40:19,329 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:19,329 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] [2021-07-09 18:40:19,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:19,553 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:19,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:19,553 INFO L82 PathProgramCache]: Analyzing trace with hash 441056662, now seen corresponding path program 24 times [2021-07-09 18:40:19,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:19,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242325966] [2021-07-09 18:40:19,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:19,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:19,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:19,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242325966] [2021-07-09 18:40:19,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242325966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:19,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100427566] [2021-07-09 18:40:19,601 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 [2021-07-09 18:40:19,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:40:19,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:19,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:19,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:19,738 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:19,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100427566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:19,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:19,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 18:40:19,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528963040] [2021-07-09 18:40:19,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:40:19,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:19,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:40:19,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:40:19,739 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) [2021-07-09 18:40:20,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:20,617 INFO L93 Difference]: Finished difference Result 4941 states and 15164 transitions. [2021-07-09 18:40:20,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:40:20,617 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 [2021-07-09 18:40:20,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:20,626 INFO L225 Difference]: With dead ends: 4941 [2021-07-09 18:40:20,626 INFO L226 Difference]: Without dead ends: 4861 [2021-07-09 18:40:20,627 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 580.9ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:40:20,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4861 states. [2021-07-09 18:40:20,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4861 to 2178. [2021-07-09 18:40:20,693 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) [2021-07-09 18:40:20,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 7331 transitions. [2021-07-09 18:40:20,699 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 7331 transitions. Word has length 30 [2021-07-09 18:40:20,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:20,699 INFO L482 AbstractCegarLoop]: Abstraction has 2178 states and 7331 transitions. [2021-07-09 18:40:20,699 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) [2021-07-09 18:40:20,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 7331 transitions. [2021-07-09 18:40:20,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:40:20,704 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:20,704 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] [2021-07-09 18:40:20,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:20,919 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:20,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:20,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1158883238, now seen corresponding path program 25 times [2021-07-09 18:40:20,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:20,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579935333] [2021-07-09 18:40:20,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:20,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:20,960 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:20,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:20,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579935333] [2021-07-09 18:40:20,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579935333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:20,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143758336] [2021-07-09 18:40:20,960 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 [2021-07-09 18:40:21,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:21,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:21,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:21,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:21,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143758336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:21,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:21,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:40:21,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363638240] [2021-07-09 18:40:21,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:40:21,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:21,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:40:21,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:40:21,124 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) [2021-07-09 18:40:22,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:22,020 INFO L93 Difference]: Finished difference Result 6842 states and 21215 transitions. [2021-07-09 18:40:22,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:40:22,021 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 [2021-07-09 18:40:22,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:22,035 INFO L225 Difference]: With dead ends: 6842 [2021-07-09 18:40:22,035 INFO L226 Difference]: Without dead ends: 6842 [2021-07-09 18:40:22,036 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 598.5ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:40:22,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6842 states. [2021-07-09 18:40:22,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6842 to 2474. [2021-07-09 18:40:22,126 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) [2021-07-09 18:40:22,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2474 states to 2474 states and 8529 transitions. [2021-07-09 18:40:22,133 INFO L78 Accepts]: Start accepts. Automaton has 2474 states and 8529 transitions. Word has length 30 [2021-07-09 18:40:22,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:22,133 INFO L482 AbstractCegarLoop]: Abstraction has 2474 states and 8529 transitions. [2021-07-09 18:40:22,134 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) [2021-07-09 18:40:22,134 INFO L276 IsEmpty]: Start isEmpty. Operand 2474 states and 8529 transitions. [2021-07-09 18:40:22,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:40:22,139 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:22,140 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] [2021-07-09 18:40:22,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-09 18:40:22,342 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:22,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:22,343 INFO L82 PathProgramCache]: Analyzing trace with hash 103505844, now seen corresponding path program 26 times [2021-07-09 18:40:22,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:22,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355984475] [2021-07-09 18:40:22,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:22,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:22,382 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:22,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:22,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355984475] [2021-07-09 18:40:22,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355984475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:22,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438241344] [2021-07-09 18:40:22,383 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) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:22,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:22,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:22,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:22,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:22,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438241344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:22,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:22,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:40:22,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253623691] [2021-07-09 18:40:22,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:40:22,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:22,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:40:22,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:40:22,535 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) [2021-07-09 18:40:23,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:23,401 INFO L93 Difference]: Finished difference Result 6641 states and 20706 transitions. [2021-07-09 18:40:23,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:40:23,401 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 [2021-07-09 18:40:23,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:23,414 INFO L225 Difference]: With dead ends: 6641 [2021-07-09 18:40:23,416 INFO L226 Difference]: Without dead ends: 6617 [2021-07-09 18:40:23,416 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 531.2ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:40:23,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6617 states. [2021-07-09 18:40:23,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6617 to 2462. [2021-07-09 18:40:23,483 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) [2021-07-09 18:40:23,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 8481 transitions. [2021-07-09 18:40:23,488 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 8481 transitions. Word has length 30 [2021-07-09 18:40:23,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:23,489 INFO L482 AbstractCegarLoop]: Abstraction has 2462 states and 8481 transitions. [2021-07-09 18:40:23,489 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) [2021-07-09 18:40:23,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 8481 transitions. [2021-07-09 18:40:23,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:40:23,493 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:23,493 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] [2021-07-09 18:40:23,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:23,693 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:23,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:23,694 INFO L82 PathProgramCache]: Analyzing trace with hash 954749098, now seen corresponding path program 27 times [2021-07-09 18:40:23,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:23,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843951246] [2021-07-09 18:40:23,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:23,735 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:23,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:23,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843951246] [2021-07-09 18:40:23,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843951246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:23,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103383848] [2021-07-09 18:40:23,736 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 [2021-07-09 18:40:23,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:40:23,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:23,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:40:23,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:23,891 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 [2021-07-09 18:40:23,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:23,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:40:23,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:40:23,900 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-09 18:40:23,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:23,984 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 [2021-07-09 18:40:23,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:24,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:40:24,033 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. [2021-07-09 18:40:24,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:41 [2021-07-09 18:40:24,192 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:24,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103383848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:24,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:24,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 21 [2021-07-09 18:40:24,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871483249] [2021-07-09 18:40:24,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:40:24,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:24,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:40:24,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:40:24,193 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) [2021-07-09 18:40:28,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:28,532 INFO L93 Difference]: Finished difference Result 7094 states and 21992 transitions. [2021-07-09 18:40:28,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-07-09 18:40:28,532 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 [2021-07-09 18:40:28,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:28,545 INFO L225 Difference]: With dead ends: 7094 [2021-07-09 18:40:28,546 INFO L226 Difference]: Without dead ends: 7094 [2021-07-09 18:40:28,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7400 ImplicationChecksByTransitivity, 3491.0ms TimeCoverageRelationStatistics Valid=2804, Invalid=16656, Unknown=0, NotChecked=0, Total=19460 [2021-07-09 18:40:28,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7094 states. [2021-07-09 18:40:28,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7094 to 2546. [2021-07-09 18:40:28,610 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) [2021-07-09 18:40:28,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 8825 transitions. [2021-07-09 18:40:28,617 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 8825 transitions. Word has length 30 [2021-07-09 18:40:28,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:28,617 INFO L482 AbstractCegarLoop]: Abstraction has 2546 states and 8825 transitions. [2021-07-09 18:40:28,617 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) [2021-07-09 18:40:28,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 8825 transitions. [2021-07-09 18:40:28,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:40:28,623 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:28,623 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] [2021-07-09 18:40:28,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:28,833 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:28,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:28,834 INFO L82 PathProgramCache]: Analyzing trace with hash -52824090, now seen corresponding path program 28 times [2021-07-09 18:40:28,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:28,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577266716] [2021-07-09 18:40:28,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:28,896 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:28,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:28,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577266716] [2021-07-09 18:40:28,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577266716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:28,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060251574] [2021-07-09 18:40:28,896 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 [2021-07-09 18:40:28,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:28,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:28,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:28,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:29,090 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:29,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060251574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:29,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:29,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:40:29,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31171796] [2021-07-09 18:40:29,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:40:29,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:29,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:40:29,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:40:29,091 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) [2021-07-09 18:40:30,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:30,130 INFO L93 Difference]: Finished difference Result 7653 states and 24222 transitions. [2021-07-09 18:40:30,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 18:40:30,130 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 [2021-07-09 18:40:30,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:30,144 INFO L225 Difference]: With dead ends: 7653 [2021-07-09 18:40:30,144 INFO L226 Difference]: Without dead ends: 7653 [2021-07-09 18:40:30,145 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1796 ImplicationChecksByTransitivity, 675.3ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:40:30,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7653 states. [2021-07-09 18:40:30,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7653 to 2551. [2021-07-09 18:40:30,235 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) [2021-07-09 18:40:30,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2551 states to 2551 states and 8850 transitions. [2021-07-09 18:40:30,240 INFO L78 Accepts]: Start accepts. Automaton has 2551 states and 8850 transitions. Word has length 30 [2021-07-09 18:40:30,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:30,241 INFO L482 AbstractCegarLoop]: Abstraction has 2551 states and 8850 transitions. [2021-07-09 18:40:30,241 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) [2021-07-09 18:40:30,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2551 states and 8850 transitions. [2021-07-09 18:40:30,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:40:30,245 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:30,245 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] [2021-07-09 18:40:30,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-09 18:40:30,446 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:30,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:30,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1172821128, now seen corresponding path program 29 times [2021-07-09 18:40:30,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:30,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475632105] [2021-07-09 18:40:30,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:30,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:30,481 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:30,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:30,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475632105] [2021-07-09 18:40:30,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475632105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:30,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950219644] [2021-07-09 18:40:30,481 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 [2021-07-09 18:40:30,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:40:30,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:30,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:30,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:30,595 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:30,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950219644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:30,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:30,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:40:30,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090862562] [2021-07-09 18:40:30,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:40:30,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:30,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:40:30,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:40:30,596 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) [2021-07-09 18:40:31,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:31,437 INFO L93 Difference]: Finished difference Result 6999 states and 21972 transitions. [2021-07-09 18:40:31,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:40:31,437 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 [2021-07-09 18:40:31,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:31,450 INFO L225 Difference]: With dead ends: 6999 [2021-07-09 18:40:31,451 INFO L226 Difference]: Without dead ends: 6979 [2021-07-09 18:40:31,451 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 498.8ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:40:31,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6979 states. [2021-07-09 18:40:31,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6979 to 2561. [2021-07-09 18:40:31,521 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) [2021-07-09 18:40:31,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 8881 transitions. [2021-07-09 18:40:31,526 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 8881 transitions. Word has length 30 [2021-07-09 18:40:31,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:31,526 INFO L482 AbstractCegarLoop]: Abstraction has 2561 states and 8881 transitions. [2021-07-09 18:40:31,526 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) [2021-07-09 18:40:31,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 8881 transitions. [2021-07-09 18:40:31,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:40:31,531 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:31,531 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] [2021-07-09 18:40:31,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-09 18:40:31,731 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:31,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:31,732 INFO L82 PathProgramCache]: Analyzing trace with hash -902311436, now seen corresponding path program 30 times [2021-07-09 18:40:31,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:31,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774240521] [2021-07-09 18:40:31,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:31,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:31,795 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:31,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:31,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774240521] [2021-07-09 18:40:31,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774240521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:31,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357894172] [2021-07-09 18:40:31,796 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 [2021-07-09 18:40:31,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:40:31,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:31,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:31,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:31,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:31,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357894172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:31,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:31,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:40:31,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997038331] [2021-07-09 18:40:31,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:40:31,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:31,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:40:31,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:40:31,953 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) [2021-07-09 18:40:32,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:32,887 INFO L93 Difference]: Finished difference Result 7314 states and 22731 transitions. [2021-07-09 18:40:32,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:40:32,888 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 [2021-07-09 18:40:32,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:32,902 INFO L225 Difference]: With dead ends: 7314 [2021-07-09 18:40:32,902 INFO L226 Difference]: Without dead ends: 7314 [2021-07-09 18:40:32,903 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1501 ImplicationChecksByTransitivity, 612.9ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:40:32,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7314 states. [2021-07-09 18:40:32,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7314 to 2550. [2021-07-09 18:40:32,976 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) [2021-07-09 18:40:32,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 8845 transitions. [2021-07-09 18:40:32,984 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 8845 transitions. Word has length 30 [2021-07-09 18:40:32,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:32,984 INFO L482 AbstractCegarLoop]: Abstraction has 2550 states and 8845 transitions. [2021-07-09 18:40:32,984 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) [2021-07-09 18:40:32,984 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 8845 transitions. [2021-07-09 18:40:32,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:40:32,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:32,990 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] [2021-07-09 18:40:33,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-09 18:40:33,205 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:33,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:33,205 INFO L82 PathProgramCache]: Analyzing trace with hash -317283250, now seen corresponding path program 31 times [2021-07-09 18:40:33,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:33,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511297046] [2021-07-09 18:40:33,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:33,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:33,266 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:33,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:33,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511297046] [2021-07-09 18:40:33,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511297046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:33,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467706470] [2021-07-09 18:40:33,267 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 [2021-07-09 18:40:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:33,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:33,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:33,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467706470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:33,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:33,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-09 18:40:33,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113724801] [2021-07-09 18:40:33,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:33,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:33,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:33,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:33,380 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) [2021-07-09 18:40:34,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:34,011 INFO L93 Difference]: Finished difference Result 5631 states and 17797 transitions. [2021-07-09 18:40:34,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:40:34,011 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 [2021-07-09 18:40:34,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:34,021 INFO L225 Difference]: With dead ends: 5631 [2021-07-09 18:40:34,021 INFO L226 Difference]: Without dead ends: 5583 [2021-07-09 18:40:34,021 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 398.4ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:40:34,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5583 states. [2021-07-09 18:40:34,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5583 to 2564. [2021-07-09 18:40:34,081 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) [2021-07-09 18:40:34,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2564 states to 2564 states and 8888 transitions. [2021-07-09 18:40:34,086 INFO L78 Accepts]: Start accepts. Automaton has 2564 states and 8888 transitions. Word has length 30 [2021-07-09 18:40:34,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:34,086 INFO L482 AbstractCegarLoop]: Abstraction has 2564 states and 8888 transitions. [2021-07-09 18:40:34,086 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) [2021-07-09 18:40:34,086 INFO L276 IsEmpty]: Start isEmpty. Operand 2564 states and 8888 transitions. [2021-07-09 18:40:34,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:40:34,090 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:34,090 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] [2021-07-09 18:40:34,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:34,291 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:34,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:34,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1809287982, now seen corresponding path program 32 times [2021-07-09 18:40:34,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:34,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110221830] [2021-07-09 18:40:34,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:34,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:34,329 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:34,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:34,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110221830] [2021-07-09 18:40:34,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110221830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:34,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873195977] [2021-07-09 18:40:34,329 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 [2021-07-09 18:40:34,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:34,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:34,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:34,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:34,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873195977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:34,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:34,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-09 18:40:34,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882342022] [2021-07-09 18:40:34,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:34,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:34,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:34,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:34,434 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) [2021-07-09 18:40:35,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:35,219 INFO L93 Difference]: Finished difference Result 6400 states and 19785 transitions. [2021-07-09 18:40:35,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:40:35,219 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 [2021-07-09 18:40:35,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:35,229 INFO L225 Difference]: With dead ends: 6400 [2021-07-09 18:40:35,230 INFO L226 Difference]: Without dead ends: 6384 [2021-07-09 18:40:35,230 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 507.6ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:40:35,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6384 states. [2021-07-09 18:40:35,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6384 to 2642. [2021-07-09 18:40:35,305 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) [2021-07-09 18:40:35,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2642 states to 2642 states and 9117 transitions. [2021-07-09 18:40:35,312 INFO L78 Accepts]: Start accepts. Automaton has 2642 states and 9117 transitions. Word has length 30 [2021-07-09 18:40:35,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:35,312 INFO L482 AbstractCegarLoop]: Abstraction has 2642 states and 9117 transitions. [2021-07-09 18:40:35,312 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) [2021-07-09 18:40:35,312 INFO L276 IsEmpty]: Start isEmpty. Operand 2642 states and 9117 transitions. [2021-07-09 18:40:35,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:40:35,317 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:35,317 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] [2021-07-09 18:40:35,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-09 18:40:35,518 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:35,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:35,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1538778290, now seen corresponding path program 33 times [2021-07-09 18:40:35,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:35,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438734564] [2021-07-09 18:40:35,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:35,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:35,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:35,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438734564] [2021-07-09 18:40:35,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438734564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:35,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365813492] [2021-07-09 18:40:35,562 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 [2021-07-09 18:40:35,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:40:35,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:35,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:35,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:35,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365813492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:35,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:35,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-09 18:40:35,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343125113] [2021-07-09 18:40:35,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:35,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:35,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:35,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:35,695 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) [2021-07-09 18:40:36,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:36,623 INFO L93 Difference]: Finished difference Result 6651 states and 20412 transitions. [2021-07-09 18:40:36,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 18:40:36,623 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 [2021-07-09 18:40:36,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:36,636 INFO L225 Difference]: With dead ends: 6651 [2021-07-09 18:40:36,636 INFO L226 Difference]: Without dead ends: 6651 [2021-07-09 18:40:36,637 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 625.8ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:40:36,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6651 states. [2021-07-09 18:40:36,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6651 to 2550. [2021-07-09 18:40:36,719 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) [2021-07-09 18:40:36,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 8845 transitions. [2021-07-09 18:40:36,725 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 8845 transitions. Word has length 30 [2021-07-09 18:40:36,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:36,726 INFO L482 AbstractCegarLoop]: Abstraction has 2550 states and 8845 transitions. [2021-07-09 18:40:36,726 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) [2021-07-09 18:40:36,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 8845 transitions. [2021-07-09 18:40:36,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:40:36,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:36,731 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] [2021-07-09 18:40:36,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:36,932 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:36,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:36,933 INFO L82 PathProgramCache]: Analyzing trace with hash 729705298, now seen corresponding path program 34 times [2021-07-09 18:40:36,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:36,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842189722] [2021-07-09 18:40:36,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:36,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:36,979 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:36,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:36,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842189722] [2021-07-09 18:40:36,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842189722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:36,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846260658] [2021-07-09 18:40:36,980 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 [2021-07-09 18:40:37,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:37,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:37,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:37,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:37,102 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:37,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846260658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:37,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:37,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:40:37,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552485674] [2021-07-09 18:40:37,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:37,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:37,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:37,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:37,105 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) [2021-07-09 18:40:37,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:37,926 INFO L93 Difference]: Finished difference Result 6000 states and 18681 transitions. [2021-07-09 18:40:37,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:40:37,926 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 [2021-07-09 18:40:37,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:37,936 INFO L225 Difference]: With dead ends: 6000 [2021-07-09 18:40:37,936 INFO L226 Difference]: Without dead ends: 5912 [2021-07-09 18:40:37,937 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 530.2ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:40:37,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5912 states. [2021-07-09 18:40:37,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5912 to 2568. [2021-07-09 18:40:37,999 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) [2021-07-09 18:40:38,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 8902 transitions. [2021-07-09 18:40:38,004 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 8902 transitions. Word has length 30 [2021-07-09 18:40:38,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:38,004 INFO L482 AbstractCegarLoop]: Abstraction has 2568 states and 8902 transitions. [2021-07-09 18:40:38,005 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) [2021-07-09 18:40:38,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 8902 transitions. [2021-07-09 18:40:38,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:40:38,009 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:38,009 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] [2021-07-09 18:40:38,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:38,209 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:38,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:38,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1432234710, now seen corresponding path program 35 times [2021-07-09 18:40:38,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:38,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848937925] [2021-07-09 18:40:38,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:38,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:38,252 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:38,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:38,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848937925] [2021-07-09 18:40:38,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848937925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:38,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794249329] [2021-07-09 18:40:38,253 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 [2021-07-09 18:40:38,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:40:38,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:38,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:38,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:38,354 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:38,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794249329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:38,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:38,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:40:38,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125312354] [2021-07-09 18:40:38,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:38,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:38,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:38,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:38,355 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) [2021-07-09 18:40:39,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:39,237 INFO L93 Difference]: Finished difference Result 6028 states and 18895 transitions. [2021-07-09 18:40:39,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:40:39,238 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 [2021-07-09 18:40:39,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:39,248 INFO L225 Difference]: With dead ends: 6028 [2021-07-09 18:40:39,248 INFO L226 Difference]: Without dead ends: 5980 [2021-07-09 18:40:39,248 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 581.9ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:40:39,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5980 states. [2021-07-09 18:40:39,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5980 to 2814. [2021-07-09 18:40:39,309 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) [2021-07-09 18:40:39,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2814 states to 2814 states and 9585 transitions. [2021-07-09 18:40:39,315 INFO L78 Accepts]: Start accepts. Automaton has 2814 states and 9585 transitions. Word has length 30 [2021-07-09 18:40:39,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:39,315 INFO L482 AbstractCegarLoop]: Abstraction has 2814 states and 9585 transitions. [2021-07-09 18:40:39,315 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) [2021-07-09 18:40:39,315 INFO L276 IsEmpty]: Start isEmpty. Operand 2814 states and 9585 transitions. [2021-07-09 18:40:39,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:40:39,319 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:39,319 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] [2021-07-09 18:40:39,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-09 18:40:39,520 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:39,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:39,520 INFO L82 PathProgramCache]: Analyzing trace with hash -2092961066, now seen corresponding path program 36 times [2021-07-09 18:40:39,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:39,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179877518] [2021-07-09 18:40:39,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:39,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:39,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:39,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179877518] [2021-07-09 18:40:39,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179877518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:39,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180291588] [2021-07-09 18:40:39,565 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 [2021-07-09 18:40:39,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:40:39,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:39,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:39,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:39,686 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:39,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180291588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:39,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:39,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:40:39,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793354240] [2021-07-09 18:40:39,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:39,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:39,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:39,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:39,688 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) [2021-07-09 18:40:40,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:40,740 INFO L93 Difference]: Finished difference Result 6722 states and 20709 transitions. [2021-07-09 18:40:40,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 18:40:40,740 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 [2021-07-09 18:40:40,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:40,753 INFO L225 Difference]: With dead ends: 6722 [2021-07-09 18:40:40,753 INFO L226 Difference]: Without dead ends: 6710 [2021-07-09 18:40:40,754 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1865 ImplicationChecksByTransitivity, 693.3ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:40:40,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6710 states. [2021-07-09 18:40:40,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6710 to 3090. [2021-07-09 18:40:40,821 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) [2021-07-09 18:40:40,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3090 states to 3090 states and 10363 transitions. [2021-07-09 18:40:40,827 INFO L78 Accepts]: Start accepts. Automaton has 3090 states and 10363 transitions. Word has length 30 [2021-07-09 18:40:40,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:40,827 INFO L482 AbstractCegarLoop]: Abstraction has 3090 states and 10363 transitions. [2021-07-09 18:40:40,827 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) [2021-07-09 18:40:40,827 INFO L276 IsEmpty]: Start isEmpty. Operand 3090 states and 10363 transitions. [2021-07-09 18:40:40,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:40:40,832 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:40,832 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] [2021-07-09 18:40:41,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:41,032 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:41,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:41,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1822451374, now seen corresponding path program 37 times [2021-07-09 18:40:41,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:41,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343009140] [2021-07-09 18:40:41,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:41,073 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:41,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:41,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343009140] [2021-07-09 18:40:41,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343009140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:41,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690303874] [2021-07-09 18:40:41,074 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) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:41,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:41,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:41,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:41,174 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:41,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690303874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:41,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:41,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:40:41,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512688796] [2021-07-09 18:40:41,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:41,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:41,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:41,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:41,175 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) [2021-07-09 18:40:42,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:42,424 INFO L93 Difference]: Finished difference Result 7117 states and 21720 transitions. [2021-07-09 18:40:42,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-09 18:40:42,424 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 [2021-07-09 18:40:42,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:42,439 INFO L225 Difference]: With dead ends: 7117 [2021-07-09 18:40:42,439 INFO L226 Difference]: Without dead ends: 7117 [2021-07-09 18:40:42,440 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2848 ImplicationChecksByTransitivity, 853.2ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-07-09 18:40:42,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7117 states. [2021-07-09 18:40:42,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7117 to 2928. [2021-07-09 18:40:42,522 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) [2021-07-09 18:40:42,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 9908 transitions. [2021-07-09 18:40:42,529 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 9908 transitions. Word has length 30 [2021-07-09 18:40:42,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:42,529 INFO L482 AbstractCegarLoop]: Abstraction has 2928 states and 9908 transitions. [2021-07-09 18:40:42,529 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) [2021-07-09 18:40:42,529 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 9908 transitions. [2021-07-09 18:40:42,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:40:42,533 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:42,533 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] [2021-07-09 18:40:42,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-09 18:40:42,734 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:42,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:42,734 INFO L82 PathProgramCache]: Analyzing trace with hash -605801532, now seen corresponding path program 38 times [2021-07-09 18:40:42,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:42,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473537966] [2021-07-09 18:40:42,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:42,798 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:42,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:42,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473537966] [2021-07-09 18:40:42,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473537966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:42,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816105669] [2021-07-09 18:40:42,798 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 [2021-07-09 18:40:42,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:42,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:42,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:40:42,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:42,970 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:42,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816105669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:42,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:42,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:40:42,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788019043] [2021-07-09 18:40:42,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:40:42,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:42,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:40:42,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:40:42,971 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) [2021-07-09 18:40:44,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:44,011 INFO L93 Difference]: Finished difference Result 11499 states and 37094 transitions. [2021-07-09 18:40:44,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:40:44,011 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 [2021-07-09 18:40:44,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:44,034 INFO L225 Difference]: With dead ends: 11499 [2021-07-09 18:40:44,034 INFO L226 Difference]: Without dead ends: 11499 [2021-07-09 18:40:44,034 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 608.4ms TimeCoverageRelationStatistics Valid=922, Invalid=2984, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:40:44,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11499 states. [2021-07-09 18:40:44,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11499 to 3853. [2021-07-09 18:40:44,160 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) [2021-07-09 18:40:44,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3853 states to 3853 states and 13861 transitions. [2021-07-09 18:40:44,168 INFO L78 Accepts]: Start accepts. Automaton has 3853 states and 13861 transitions. Word has length 32 [2021-07-09 18:40:44,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:44,168 INFO L482 AbstractCegarLoop]: Abstraction has 3853 states and 13861 transitions. [2021-07-09 18:40:44,168 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) [2021-07-09 18:40:44,168 INFO L276 IsEmpty]: Start isEmpty. Operand 3853 states and 13861 transitions. [2021-07-09 18:40:44,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:40:44,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:44,174 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] [2021-07-09 18:40:44,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-09 18:40:44,375 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:44,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:44,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1297197704, now seen corresponding path program 17 times [2021-07-09 18:40:44,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:44,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549008886] [2021-07-09 18:40:44,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:44,441 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:44,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:44,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549008886] [2021-07-09 18:40:44,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549008886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:44,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573877158] [2021-07-09 18:40:44,441 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 [2021-07-09 18:40:44,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:40:44,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:44,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:40:44,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:44,599 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:44,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573877158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:44,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:44,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:40:44,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086368425] [2021-07-09 18:40:44,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:40:44,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:44,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:40:44,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:40:44,600 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) [2021-07-09 18:40:45,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:45,686 INFO L93 Difference]: Finished difference Result 11274 states and 36638 transitions. [2021-07-09 18:40:45,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 18:40:45,687 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 [2021-07-09 18:40:45,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:45,710 INFO L225 Difference]: With dead ends: 11274 [2021-07-09 18:40:45,710 INFO L226 Difference]: Without dead ends: 11274 [2021-07-09 18:40:45,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 662.7ms TimeCoverageRelationStatistics Valid=918, Invalid=3114, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:40:45,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11274 states. [2021-07-09 18:40:45,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11274 to 3659. [2021-07-09 18:40:45,827 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) [2021-07-09 18:40:45,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3659 states to 3659 states and 12982 transitions. [2021-07-09 18:40:45,835 INFO L78 Accepts]: Start accepts. Automaton has 3659 states and 12982 transitions. Word has length 32 [2021-07-09 18:40:45,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:45,835 INFO L482 AbstractCegarLoop]: Abstraction has 3659 states and 12982 transitions. [2021-07-09 18:40:45,836 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) [2021-07-09 18:40:45,836 INFO L276 IsEmpty]: Start isEmpty. Operand 3659 states and 12982 transitions. [2021-07-09 18:40:45,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:40:45,841 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:45,841 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] [2021-07-09 18:40:46,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:46,042 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:46,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:46,042 INFO L82 PathProgramCache]: Analyzing trace with hash 600098510, now seen corresponding path program 39 times [2021-07-09 18:40:46,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:46,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768675930] [2021-07-09 18:40:46,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:46,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:46,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768675930] [2021-07-09 18:40:46,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768675930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:46,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000765662] [2021-07-09 18:40:46,086 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) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:46,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:40:46,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:46,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:40:46,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:46,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000765662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:46,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:46,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:40:46,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313492330] [2021-07-09 18:40:46,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:40:46,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:46,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:40:46,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:40:46,231 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) [2021-07-09 18:40:46,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:46,826 INFO L93 Difference]: Finished difference Result 9494 states and 30497 transitions. [2021-07-09 18:40:46,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:40:46,826 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 [2021-07-09 18:40:46,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:46,843 INFO L225 Difference]: With dead ends: 9494 [2021-07-09 18:40:46,843 INFO L226 Difference]: Without dead ends: 9486 [2021-07-09 18:40:46,843 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 359.2ms TimeCoverageRelationStatistics Valid=396, Invalid=1244, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:40:46,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9486 states. [2021-07-09 18:40:46,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9486 to 3671. [2021-07-09 18:40:46,935 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) [2021-07-09 18:40:46,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3671 states to 3671 states and 13028 transitions. [2021-07-09 18:40:46,943 INFO L78 Accepts]: Start accepts. Automaton has 3671 states and 13028 transitions. Word has length 32 [2021-07-09 18:40:46,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:46,943 INFO L482 AbstractCegarLoop]: Abstraction has 3671 states and 13028 transitions. [2021-07-09 18:40:46,943 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) [2021-07-09 18:40:46,943 INFO L276 IsEmpty]: Start isEmpty. Operand 3671 states and 13028 transitions. [2021-07-09 18:40:46,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:40:46,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:46,949 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] [2021-07-09 18:40:47,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-09 18:40:47,150 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:47,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:47,150 INFO L82 PathProgramCache]: Analyzing trace with hash 870608202, now seen corresponding path program 40 times [2021-07-09 18:40:47,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:47,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409597436] [2021-07-09 18:40:47,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:47,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:47,191 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:47,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:47,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409597436] [2021-07-09 18:40:47,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409597436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:47,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797656331] [2021-07-09 18:40:47,192 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 [2021-07-09 18:40:47,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:47,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:47,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:40:47,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:47,320 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:47,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797656331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:47,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:47,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:40:47,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789085275] [2021-07-09 18:40:47,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:40:47,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:47,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:40:47,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:40:47,321 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) [2021-07-09 18:40:48,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:48,056 INFO L93 Difference]: Finished difference Result 10005 states and 31855 transitions. [2021-07-09 18:40:48,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:40:48,056 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 [2021-07-09 18:40:48,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:48,076 INFO L225 Difference]: With dead ends: 10005 [2021-07-09 18:40:48,076 INFO L226 Difference]: Without dead ends: 10005 [2021-07-09 18:40:48,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 377.7ms TimeCoverageRelationStatistics Valid=480, Invalid=1412, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:40:48,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10005 states. [2021-07-09 18:40:48,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10005 to 3659. [2021-07-09 18:40:48,194 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) [2021-07-09 18:40:48,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3659 states to 3659 states and 12982 transitions. [2021-07-09 18:40:48,201 INFO L78 Accepts]: Start accepts. Automaton has 3659 states and 12982 transitions. Word has length 32 [2021-07-09 18:40:48,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:48,201 INFO L482 AbstractCegarLoop]: Abstraction has 3659 states and 12982 transitions. [2021-07-09 18:40:48,201 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) [2021-07-09 18:40:48,201 INFO L276 IsEmpty]: Start isEmpty. Operand 3659 states and 12982 transitions. [2021-07-09 18:40:48,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:40:48,206 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:48,206 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] [2021-07-09 18:40:48,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:48,407 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:48,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:48,407 INFO L82 PathProgramCache]: Analyzing trace with hash 2007937660, now seen corresponding path program 18 times [2021-07-09 18:40:48,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:48,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649932359] [2021-07-09 18:40:48,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:48,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:48,454 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:48,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:48,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649932359] [2021-07-09 18:40:48,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649932359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:48,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98738644] [2021-07-09 18:40:48,455 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 [2021-07-09 18:40:48,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:40:48,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:48,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:48,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:48,608 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:48,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98738644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:48,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:48,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 18:40:48,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072832023] [2021-07-09 18:40:48,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:40:48,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:48,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:40:48,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:40:48,609 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) [2021-07-09 18:40:50,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:50,338 INFO L93 Difference]: Finished difference Result 10824 states and 34873 transitions. [2021-07-09 18:40:50,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-07-09 18:40:50,338 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 [2021-07-09 18:40:50,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:50,360 INFO L225 Difference]: With dead ends: 10824 [2021-07-09 18:40:50,360 INFO L226 Difference]: Without dead ends: 10824 [2021-07-09 18:40:50,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3112 ImplicationChecksByTransitivity, 1089.1ms TimeCoverageRelationStatistics Valid=1649, Invalid=7281, Unknown=0, NotChecked=0, Total=8930 [2021-07-09 18:40:50,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10824 states. [2021-07-09 18:40:50,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10824 to 4026. [2021-07-09 18:40:50,490 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) [2021-07-09 18:40:50,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4026 states to 4026 states and 14372 transitions. [2021-07-09 18:40:50,501 INFO L78 Accepts]: Start accepts. Automaton has 4026 states and 14372 transitions. Word has length 32 [2021-07-09 18:40:50,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:50,501 INFO L482 AbstractCegarLoop]: Abstraction has 4026 states and 14372 transitions. [2021-07-09 18:40:50,501 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) [2021-07-09 18:40:50,502 INFO L276 IsEmpty]: Start isEmpty. Operand 4026 states and 14372 transitions. [2021-07-09 18:40:50,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:40:50,508 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:50,508 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] [2021-07-09 18:40:50,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-09 18:40:50,709 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:50,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:50,709 INFO L82 PathProgramCache]: Analyzing trace with hash -383319252, now seen corresponding path program 41 times [2021-07-09 18:40:50,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:50,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227862130] [2021-07-09 18:40:50,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:50,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:50,774 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:50,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:50,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227862130] [2021-07-09 18:40:50,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227862130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:50,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056247019] [2021-07-09 18:40:50,774 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 [2021-07-09 18:40:50,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:40:50,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:50,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:50,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:50,942 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:40:50,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056247019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:50,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:50,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:40:50,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975918313] [2021-07-09 18:40:50,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:40:50,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:50,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:40:50,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:40:50,943 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) [2021-07-09 18:40:52,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:52,950 INFO L93 Difference]: Finished difference Result 11450 states and 37158 transitions. [2021-07-09 18:40:52,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-07-09 18:40:52,951 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 [2021-07-09 18:40:52,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:52,972 INFO L225 Difference]: With dead ends: 11450 [2021-07-09 18:40:52,972 INFO L226 Difference]: Without dead ends: 11402 [2021-07-09 18:40:52,974 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4651 ImplicationChecksByTransitivity, 1346.5ms TimeCoverageRelationStatistics Valid=2133, Invalid=10299, Unknown=0, NotChecked=0, Total=12432 [2021-07-09 18:40:52,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11402 states. [2021-07-09 18:40:53,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11402 to 4295. [2021-07-09 18:40:53,128 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) [2021-07-09 18:40:53,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4295 states to 4295 states and 15593 transitions. [2021-07-09 18:40:53,138 INFO L78 Accepts]: Start accepts. Automaton has 4295 states and 15593 transitions. Word has length 32 [2021-07-09 18:40:53,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:53,139 INFO L482 AbstractCegarLoop]: Abstraction has 4295 states and 15593 transitions. [2021-07-09 18:40:53,139 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) [2021-07-09 18:40:53,139 INFO L276 IsEmpty]: Start isEmpty. Operand 4295 states and 15593 transitions. [2021-07-09 18:40:53,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:40:53,146 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:53,146 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] [2021-07-09 18:40:53,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:53,346 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:53,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:53,347 INFO L82 PathProgramCache]: Analyzing trace with hash 717122884, now seen corresponding path program 19 times [2021-07-09 18:40:53,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:53,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404700289] [2021-07-09 18:40:53,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:53,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:53,394 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:53,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:53,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404700289] [2021-07-09 18:40:53,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404700289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:53,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209677063] [2021-07-09 18:40:53,394 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 [2021-07-09 18:40:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:53,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:40:53,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:53,552 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:53,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209677063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:53,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:53,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-09 18:40:53,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072127688] [2021-07-09 18:40:53,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:40:53,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:53,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:40:53,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:40:53,553 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) [2021-07-09 18:40:54,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:54,459 INFO L93 Difference]: Finished difference Result 11886 states and 38735 transitions. [2021-07-09 18:40:54,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:40:54,459 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 [2021-07-09 18:40:54,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:54,493 INFO L225 Difference]: With dead ends: 11886 [2021-07-09 18:40:54,493 INFO L226 Difference]: Without dead ends: 11886 [2021-07-09 18:40:54,493 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 550.3ms TimeCoverageRelationStatistics Valid=740, Invalid=2016, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:40:54,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11886 states. [2021-07-09 18:40:54,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11886 to 4493. [2021-07-09 18:40:54,671 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) [2021-07-09 18:40:54,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4493 states to 4493 states and 16218 transitions. [2021-07-09 18:40:54,682 INFO L78 Accepts]: Start accepts. Automaton has 4493 states and 16218 transitions. Word has length 32 [2021-07-09 18:40:54,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:54,682 INFO L482 AbstractCegarLoop]: Abstraction has 4493 states and 16218 transitions. [2021-07-09 18:40:54,682 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) [2021-07-09 18:40:54,682 INFO L276 IsEmpty]: Start isEmpty. Operand 4493 states and 16218 transitions. [2021-07-09 18:40:54,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:40:54,689 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:54,689 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] [2021-07-09 18:40:54,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-07-09 18:40:54,889 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:54,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:54,889 INFO L82 PathProgramCache]: Analyzing trace with hash -338254510, now seen corresponding path program 20 times [2021-07-09 18:40:54,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:54,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217489750] [2021-07-09 18:40:54,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:54,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:54,937 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:54,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:54,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217489750] [2021-07-09 18:40:54,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217489750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:54,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177620030] [2021-07-09 18:40:54,938 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 [2021-07-09 18:40:54,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:54,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:54,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:54,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:55,101 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:55,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177620030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:55,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:55,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:40:55,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303537087] [2021-07-09 18:40:55,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:40:55,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:55,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:40:55,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:40:55,102 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) [2021-07-09 18:40:56,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:56,791 INFO L93 Difference]: Finished difference Result 12030 states and 39107 transitions. [2021-07-09 18:40:56,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-07-09 18:40:56,792 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 [2021-07-09 18:40:56,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:56,819 INFO L225 Difference]: With dead ends: 12030 [2021-07-09 18:40:56,819 INFO L226 Difference]: Without dead ends: 12026 [2021-07-09 18:40:56,820 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3145 ImplicationChecksByTransitivity, 1016.0ms TimeCoverageRelationStatistics Valid=1618, Invalid=7124, Unknown=0, NotChecked=0, Total=8742 [2021-07-09 18:40:56,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12026 states. [2021-07-09 18:40:56,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12026 to 4522. [2021-07-09 18:40:56,958 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) [2021-07-09 18:40:56,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4522 states to 4522 states and 16299 transitions. [2021-07-09 18:40:56,968 INFO L78 Accepts]: Start accepts. Automaton has 4522 states and 16299 transitions. Word has length 32 [2021-07-09 18:40:56,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:56,968 INFO L482 AbstractCegarLoop]: Abstraction has 4522 states and 16299 transitions. [2021-07-09 18:40:56,968 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) [2021-07-09 18:40:56,969 INFO L276 IsEmpty]: Start isEmpty. Operand 4522 states and 16299 transitions. [2021-07-09 18:40:56,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:40:56,977 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:56,977 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] [2021-07-09 18:40:57,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:57,190 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:57,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:57,190 INFO L82 PathProgramCache]: Analyzing trace with hash 956690446, now seen corresponding path program 21 times [2021-07-09 18:40:57,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:57,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301884346] [2021-07-09 18:40:57,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:57,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:57,236 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:57,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:57,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301884346] [2021-07-09 18:40:57,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301884346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:57,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742763557] [2021-07-09 18:40:57,237 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 [2021-07-09 18:40:57,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 18:40:57,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:57,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:40:57,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:57,403 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:57,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742763557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:57,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:57,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-09 18:40:57,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49466795] [2021-07-09 18:40:57,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:40:57,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:57,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:40:57,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:40:57,404 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) [2021-07-09 18:40:58,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:58,578 INFO L93 Difference]: Finished difference Result 11020 states and 36349 transitions. [2021-07-09 18:40:58,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-09 18:40:58,579 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 [2021-07-09 18:40:58,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:58,601 INFO L225 Difference]: With dead ends: 11020 [2021-07-09 18:40:58,601 INFO L226 Difference]: Without dead ends: 10988 [2021-07-09 18:40:58,601 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 744.6ms TimeCoverageRelationStatistics Valid=1165, Invalid=4237, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 18:40:58,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10988 states. [2021-07-09 18:40:58,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10988 to 4521. [2021-07-09 18:40:58,727 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) [2021-07-09 18:40:58,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4521 states to 4521 states and 16292 transitions. [2021-07-09 18:40:58,737 INFO L78 Accepts]: Start accepts. Automaton has 4521 states and 16292 transitions. Word has length 32 [2021-07-09 18:40:58,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:58,737 INFO L482 AbstractCegarLoop]: Abstraction has 4521 states and 16292 transitions. [2021-07-09 18:40:58,737 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) [2021-07-09 18:40:58,737 INFO L276 IsEmpty]: Start isEmpty. Operand 4521 states and 16292 transitions. [2021-07-09 18:40:58,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:40:58,744 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:58,744 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] [2021-07-09 18:40:58,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-09 18:40:58,945 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:58,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:58,945 INFO L82 PathProgramCache]: Analyzing trace with hash 313112068, now seen corresponding path program 42 times [2021-07-09 18:40:58,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:58,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641473017] [2021-07-09 18:40:58,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:58,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:59,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:59,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641473017] [2021-07-09 18:40:59,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641473017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:59,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199940007] [2021-07-09 18:40:59,437 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 [2021-07-09 18:40:59,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:40:59,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:59,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:40:59,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:59,595 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 [2021-07-09 18:40:59,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:59,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:40:59,606 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. [2021-07-09 18:40:59,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-07-09 18:40:59,651 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-07-09 18:40:59,651 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 [2021-07-09 18:40:59,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:59,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:40:59,666 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. [2021-07-09 18:40:59,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:42 [2021-07-09 18:40:59,736 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-07-09 18:40:59,736 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 [2021-07-09 18:40:59,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:59,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:40:59,756 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. [2021-07-09 18:40:59,756 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:54 [2021-07-09 18:40:59,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:59,903 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-07-09 18:40:59,903 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 [2021-07-09 18:40:59,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:59,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:40:59,944 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. [2021-07-09 18:40:59,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:58, output treesize:57 [2021-07-09 18:41:00,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:00,163 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-07-09 18:41:00,164 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 [2021-07-09 18:41:00,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:00,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:00,187 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. [2021-07-09 18:41:00,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:64, output treesize:63 [2021-07-09 18:41:00,344 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:00,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199940007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:00,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:00,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-07-09 18:41:00,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771474916] [2021-07-09 18:41:00,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:41:00,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:00,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:41:00,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:41:00,345 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) [2021-07-09 18:41:00,877 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2021-07-09 18:41:03,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:03,096 INFO L93 Difference]: Finished difference Result 6435 states and 22058 transitions. [2021-07-09 18:41:03,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:41:03,096 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 [2021-07-09 18:41:03,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:03,108 INFO L225 Difference]: With dead ends: 6435 [2021-07-09 18:41:03,108 INFO L226 Difference]: Without dead ends: 6256 [2021-07-09 18:41:03,108 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 2588.5ms TimeCoverageRelationStatistics Valid=509, Invalid=3397, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:41:03,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6256 states. [2021-07-09 18:41:03,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6256 to 4629. [2021-07-09 18:41:03,184 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) [2021-07-09 18:41:03,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 16674 transitions. [2021-07-09 18:41:03,194 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 16674 transitions. Word has length 32 [2021-07-09 18:41:03,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:03,195 INFO L482 AbstractCegarLoop]: Abstraction has 4629 states and 16674 transitions. [2021-07-09 18:41:03,195 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) [2021-07-09 18:41:03,195 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 16674 transitions. [2021-07-09 18:41:03,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:41:03,204 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:03,204 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] [2021-07-09 18:41:03,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:03,419 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:03,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:03,419 INFO L82 PathProgramCache]: Analyzing trace with hash 2029292164, now seen corresponding path program 43 times [2021-07-09 18:41:03,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:03,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19366880] [2021-07-09 18:41:03,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:03,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:03,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:03,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19366880] [2021-07-09 18:41:03,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19366880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:03,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22012162] [2021-07-09 18:41:03,857 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 [2021-07-09 18:41:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:03,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:41:03,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:03,980 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 [2021-07-09 18:41:03,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:03,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:03,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:41:03,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-07-09 18:41:04,018 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 [2021-07-09 18:41:04,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:04,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:04,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:41:04,030 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-07-09 18:41:04,077 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-07-09 18:41:04,077 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 [2021-07-09 18:41:04,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:04,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:04,092 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. [2021-07-09 18:41:04,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-07-09 18:41:04,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:04,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:04,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:41:04,213 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 [2021-07-09 18:41:04,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:04,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:04,231 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. [2021-07-09 18:41:04,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:42 [2021-07-09 18:41:04,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:04,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:04,296 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 [2021-07-09 18:41:04,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:04,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:04,313 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. [2021-07-09 18:41:04,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:39 [2021-07-09 18:41:04,401 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:04,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22012162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:04,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:04,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-07-09 18:41:04,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410171994] [2021-07-09 18:41:04,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:41:04,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:04,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:41:04,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:41:04,402 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) [2021-07-09 18:41:06,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:06,112 INFO L93 Difference]: Finished difference Result 6469 states and 22175 transitions. [2021-07-09 18:41:06,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:41:06,112 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 [2021-07-09 18:41:06,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:06,125 INFO L225 Difference]: With dead ends: 6469 [2021-07-09 18:41:06,125 INFO L226 Difference]: Without dead ends: 6146 [2021-07-09 18:41:06,125 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1715.0ms TimeCoverageRelationStatistics Valid=413, Invalid=1939, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:41:06,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6146 states. [2021-07-09 18:41:06,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6146 to 4719. [2021-07-09 18:41:06,193 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) [2021-07-09 18:41:06,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4719 states to 4719 states and 16956 transitions. [2021-07-09 18:41:06,203 INFO L78 Accepts]: Start accepts. Automaton has 4719 states and 16956 transitions. Word has length 32 [2021-07-09 18:41:06,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:06,203 INFO L482 AbstractCegarLoop]: Abstraction has 4719 states and 16956 transitions. [2021-07-09 18:41:06,204 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) [2021-07-09 18:41:06,204 INFO L276 IsEmpty]: Start isEmpty. Operand 4719 states and 16956 transitions. [2021-07-09 18:41:06,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:41:06,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:06,211 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] [2021-07-09 18:41:06,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-09 18:41:06,411 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:06,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:06,412 INFO L82 PathProgramCache]: Analyzing trace with hash -500654400, now seen corresponding path program 44 times [2021-07-09 18:41:06,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:06,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471520033] [2021-07-09 18:41:06,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:06,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:06,905 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:06,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:06,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471520033] [2021-07-09 18:41:06,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471520033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:06,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549536000] [2021-07-09 18:41:06,905 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 [2021-07-09 18:41:06,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:06,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:06,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:41:06,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:07,036 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 [2021-07-09 18:41:07,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:07,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:07,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:41:07,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-07-09 18:41:07,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:07,094 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 [2021-07-09 18:41:07,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:07,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:07,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:41:07,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-07-09 18:41:07,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:07,167 INFO L354 Elim1Store]: treesize reduction 38, result has 25.5 percent of original size [2021-07-09 18:41:07,168 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 [2021-07-09 18:41:07,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:07,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:07,183 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. [2021-07-09 18:41:07,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:53 [2021-07-09 18:41:07,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:07,287 INFO L354 Elim1Store]: treesize reduction 35, result has 12.5 percent of original size [2021-07-09 18:41:07,288 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 [2021-07-09 18:41:07,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:07,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:07,306 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. [2021-07-09 18:41:07,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:53 [2021-07-09 18:41:07,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:07,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:07,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:07,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:07,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:41:07,485 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 [2021-07-09 18:41:07,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:07,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:07,510 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. [2021-07-09 18:41:07,510 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:48 [2021-07-09 18:41:07,610 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:07,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549536000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:07,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:07,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-07-09 18:41:07,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635835673] [2021-07-09 18:41:07,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:41:07,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:07,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:41:07,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:41:07,611 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) [2021-07-09 18:41:07,966 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-07-09 18:41:08,746 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2021-07-09 18:41:09,136 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2021-07-09 18:41:10,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:10,264 INFO L93 Difference]: Finished difference Result 7571 states and 25578 transitions. [2021-07-09 18:41:10,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:41:10,264 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 [2021-07-09 18:41:10,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:10,279 INFO L225 Difference]: With dead ends: 7571 [2021-07-09 18:41:10,280 INFO L226 Difference]: Without dead ends: 7144 [2021-07-09 18:41:10,280 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 2671.5ms TimeCoverageRelationStatistics Valid=604, Invalid=2936, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:41:10,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7144 states. [2021-07-09 18:41:10,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7144 to 4997. [2021-07-09 18:41:10,365 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) [2021-07-09 18:41:10,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4997 states to 4997 states and 17842 transitions. [2021-07-09 18:41:10,376 INFO L78 Accepts]: Start accepts. Automaton has 4997 states and 17842 transitions. Word has length 32 [2021-07-09 18:41:10,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:10,376 INFO L482 AbstractCegarLoop]: Abstraction has 4997 states and 17842 transitions. [2021-07-09 18:41:10,376 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) [2021-07-09 18:41:10,377 INFO L276 IsEmpty]: Start isEmpty. Operand 4997 states and 17842 transitions. [2021-07-09 18:41:10,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:41:10,384 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:10,384 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] [2021-07-09 18:41:10,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-09 18:41:10,584 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:10,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:10,585 INFO L82 PathProgramCache]: Analyzing trace with hash 457173692, now seen corresponding path program 45 times [2021-07-09 18:41:10,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:10,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901872390] [2021-07-09 18:41:10,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:10,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:11,149 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:11,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:11,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901872390] [2021-07-09 18:41:11,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901872390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:11,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343851688] [2021-07-09 18:41:11,150 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 [2021-07-09 18:41:11,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:41:11,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:11,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:41:11,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:11,352 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 [2021-07-09 18:41:11,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:11,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:11,364 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. [2021-07-09 18:41:11,364 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:33 [2021-07-09 18:41:11,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:11,410 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 [2021-07-09 18:41:11,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:11,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:11,426 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. [2021-07-09 18:41:11,426 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:40 [2021-07-09 18:41:11,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:11,499 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-07-09 18:41:11,499 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 [2021-07-09 18:41:11,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:11,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:11,519 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. [2021-07-09 18:41:11,519 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:53, output treesize:52 [2021-07-09 18:41:11,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:11,650 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-07-09 18:41:11,651 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 [2021-07-09 18:41:11,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:11,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:11,680 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. [2021-07-09 18:41:11,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:68, output treesize:67 [2021-07-09 18:41:11,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:11,909 INFO L354 Elim1Store]: treesize reduction 104, result has 16.8 percent of original size [2021-07-09 18:41:11,910 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 [2021-07-09 18:41:11,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:11,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:11,940 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. [2021-07-09 18:41:11,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:76, output treesize:75 [2021-07-09 18:41:12,383 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:12,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343851688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:12,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:12,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-09 18:41:12,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176952941] [2021-07-09 18:41:12,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:41:12,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:12,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:41:12,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:41:12,384 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) [2021-07-09 18:41:12,787 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2021-07-09 18:41:13,214 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-07-09 18:41:13,382 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2021-07-09 18:41:13,844 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2021-07-09 18:41:13,985 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2021-07-09 18:41:14,183 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2021-07-09 18:41:14,947 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2021-07-09 18:41:15,441 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2021-07-09 18:41:15,952 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2021-07-09 18:41:16,146 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 73 [2021-07-09 18:41:16,470 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2021-07-09 18:41:16,988 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 85 [2021-07-09 18:41:17,300 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2021-07-09 18:41:17,466 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 83 [2021-07-09 18:41:18,457 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 88 [2021-07-09 18:41:18,937 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 87 [2021-07-09 18:41:19,452 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 85 [2021-07-09 18:41:22,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:22,043 INFO L93 Difference]: Finished difference Result 7614 states and 26316 transitions. [2021-07-09 18:41:22,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 18:41:22,043 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 [2021-07-09 18:41:22,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:22,063 INFO L225 Difference]: With dead ends: 7614 [2021-07-09 18:41:22,064 INFO L226 Difference]: Without dead ends: 7468 [2021-07-09 18:41:22,064 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1908 ImplicationChecksByTransitivity, 6266.5ms TimeCoverageRelationStatistics Valid=951, Invalid=5369, Unknown=0, NotChecked=0, Total=6320 [2021-07-09 18:41:22,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7468 states. [2021-07-09 18:41:22,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7468 to 5655. [2021-07-09 18:41:22,190 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) [2021-07-09 18:41:22,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5655 states to 5655 states and 20327 transitions. [2021-07-09 18:41:22,205 INFO L78 Accepts]: Start accepts. Automaton has 5655 states and 20327 transitions. Word has length 32 [2021-07-09 18:41:22,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:22,205 INFO L482 AbstractCegarLoop]: Abstraction has 5655 states and 20327 transitions. [2021-07-09 18:41:22,206 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) [2021-07-09 18:41:22,206 INFO L276 IsEmpty]: Start isEmpty. Operand 5655 states and 20327 transitions. [2021-07-09 18:41:22,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:41:22,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:22,215 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] [2021-07-09 18:41:22,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-09 18:41:22,416 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:22,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:22,416 INFO L82 PathProgramCache]: Analyzing trace with hash 737661248, now seen corresponding path program 46 times [2021-07-09 18:41:22,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:22,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432105867] [2021-07-09 18:41:22,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:22,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:22,901 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:22,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:22,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432105867] [2021-07-09 18:41:22,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432105867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:22,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990227965] [2021-07-09 18:41:22,902 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 [2021-07-09 18:41:22,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:22,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:22,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:41:22,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:23,092 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 [2021-07-09 18:41:23,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:23,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:23,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:41:23,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-07-09 18:41:23,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:23,134 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 [2021-07-09 18:41:23,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:23,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:23,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:41:23,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-07-09 18:41:23,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:23,233 INFO L354 Elim1Store]: treesize reduction 38, result has 25.5 percent of original size [2021-07-09 18:41:23,233 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 [2021-07-09 18:41:23,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:23,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:23,248 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. [2021-07-09 18:41:23,248 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:48 [2021-07-09 18:41:23,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:23,313 INFO L354 Elim1Store]: treesize reduction 35, result has 12.5 percent of original size [2021-07-09 18:41:23,314 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 [2021-07-09 18:41:23,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:23,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:23,335 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. [2021-07-09 18:41:23,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:48 [2021-07-09 18:41:23,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:23,434 INFO L354 Elim1Store]: treesize reduction 72, result has 20.0 percent of original size [2021-07-09 18:41:23,434 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 [2021-07-09 18:41:23,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:23,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:23,455 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. [2021-07-09 18:41:23,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:61, output treesize:60 [2021-07-09 18:41:23,696 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:23,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990227965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:23,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:23,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-07-09 18:41:23,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979327274] [2021-07-09 18:41:23,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:41:23,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:23,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:41:23,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:41:23,697 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) [2021-07-09 18:41:25,914 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-07-09 18:41:28,993 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 81 [2021-07-09 18:41:29,160 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 73 [2021-07-09 18:41:29,707 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 77 [2021-07-09 18:41:29,917 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 71 [2021-07-09 18:41:30,143 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2021-07-09 18:41:30,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:30,225 INFO L93 Difference]: Finished difference Result 9721 states and 32858 transitions. [2021-07-09 18:41:30,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 18:41:30,225 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 [2021-07-09 18:41:30,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:30,243 INFO L225 Difference]: With dead ends: 9721 [2021-07-09 18:41:30,243 INFO L226 Difference]: Without dead ends: 9341 [2021-07-09 18:41:30,244 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2164 ImplicationChecksByTransitivity, 5237.6ms TimeCoverageRelationStatistics Valid=1229, Invalid=6253, Unknown=0, NotChecked=0, Total=7482 [2021-07-09 18:41:30,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9341 states. [2021-07-09 18:41:30,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9341 to 5540. [2021-07-09 18:41:30,336 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) [2021-07-09 18:41:30,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5540 states to 5540 states and 20090 transitions. [2021-07-09 18:41:30,350 INFO L78 Accepts]: Start accepts. Automaton has 5540 states and 20090 transitions. Word has length 32 [2021-07-09 18:41:30,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:30,350 INFO L482 AbstractCegarLoop]: Abstraction has 5540 states and 20090 transitions. [2021-07-09 18:41:30,350 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) [2021-07-09 18:41:30,350 INFO L276 IsEmpty]: Start isEmpty. Operand 5540 states and 20090 transitions. [2021-07-09 18:41:30,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:41:30,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:30,358 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] [2021-07-09 18:41:30,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:30,559 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:30,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:30,559 INFO L82 PathProgramCache]: Analyzing trace with hash -2125295156, now seen corresponding path program 47 times [2021-07-09 18:41:30,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:30,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713267995] [2021-07-09 18:41:30,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:30,993 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:30,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:30,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713267995] [2021-07-09 18:41:30,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713267995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:30,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273290951] [2021-07-09 18:41:30,993 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 [2021-07-09 18:41:31,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:41:31,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:31,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:41:31,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:31,107 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 [2021-07-09 18:41:31,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:31,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:31,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:41:31,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:23 [2021-07-09 18:41:31,175 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 [2021-07-09 18:41:31,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:31,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:31,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:41:31,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-07-09 18:41:31,211 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 [2021-07-09 18:41:31,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:31,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:31,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:41:31,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:27 [2021-07-09 18:41:31,266 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-07-09 18:41:31,266 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 [2021-07-09 18:41:31,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:31,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:31,279 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. [2021-07-09 18:41:31,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:39 [2021-07-09 18:41:31,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:31,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:31,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:41:31,403 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 [2021-07-09 18:41:31,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:31,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:31,418 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. [2021-07-09 18:41:31,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:41 [2021-07-09 18:41:31,522 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:31,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273290951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:31,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:31,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-07-09 18:41:31,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502369140] [2021-07-09 18:41:31,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:41:31,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:31,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:41:31,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:41:31,523 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) [2021-07-09 18:41:33,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:33,394 INFO L93 Difference]: Finished difference Result 8803 states and 30962 transitions. [2021-07-09 18:41:33,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:41:33,394 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 [2021-07-09 18:41:33,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:33,411 INFO L225 Difference]: With dead ends: 8803 [2021-07-09 18:41:33,411 INFO L226 Difference]: Without dead ends: 8465 [2021-07-09 18:41:33,412 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 1710.3ms TimeCoverageRelationStatistics Valid=462, Invalid=2844, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:41:33,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8465 states. [2021-07-09 18:41:33,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8465 to 6862. [2021-07-09 18:41:33,521 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) [2021-07-09 18:41:33,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6862 states to 6862 states and 24702 transitions. [2021-07-09 18:41:33,539 INFO L78 Accepts]: Start accepts. Automaton has 6862 states and 24702 transitions. Word has length 32 [2021-07-09 18:41:33,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:33,539 INFO L482 AbstractCegarLoop]: Abstraction has 6862 states and 24702 transitions. [2021-07-09 18:41:33,539 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) [2021-07-09 18:41:33,539 INFO L276 IsEmpty]: Start isEmpty. Operand 6862 states and 24702 transitions. [2021-07-09 18:41:33,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:41:33,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:33,551 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] [2021-07-09 18:41:33,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-09 18:41:33,753 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:33,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:33,753 INFO L82 PathProgramCache]: Analyzing trace with hash -787029172, now seen corresponding path program 48 times [2021-07-09 18:41:33,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:33,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454232593] [2021-07-09 18:41:33,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:34,182 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:34,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:34,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454232593] [2021-07-09 18:41:34,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454232593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:34,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707616492] [2021-07-09 18:41:34,183 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:41:34,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:41:34,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:34,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:41:34,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:34,320 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 [2021-07-09 18:41:34,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:34,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:34,331 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. [2021-07-09 18:41:34,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-07-09 18:41:34,378 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-07-09 18:41:34,379 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 [2021-07-09 18:41:34,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:34,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:34,391 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. [2021-07-09 18:41:34,391 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:39 [2021-07-09 18:41:34,480 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-07-09 18:41:34,480 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 [2021-07-09 18:41:34,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:34,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:34,496 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. [2021-07-09 18:41:34,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:51 [2021-07-09 18:41:34,636 INFO L354 Elim1Store]: treesize reduction 72, result has 18.2 percent of original size [2021-07-09 18:41:34,636 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 [2021-07-09 18:41:34,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:34,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:34,657 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. [2021-07-09 18:41:34,658 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:64, output treesize:63 [2021-07-09 18:41:34,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:34,780 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-07-09 18:41:34,780 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 [2021-07-09 18:41:34,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:34,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:34,795 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. [2021-07-09 18:41:34,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:46 [2021-07-09 18:41:34,915 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:34,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707616492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:34,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:34,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-07-09 18:41:34,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167984621] [2021-07-09 18:41:34,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:41:34,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:34,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:41:34,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:41:34,916 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) [2021-07-09 18:41:39,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:39,538 INFO L93 Difference]: Finished difference Result 10382 states and 35158 transitions. [2021-07-09 18:41:39,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:41:39,539 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 [2021-07-09 18:41:39,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:39,561 INFO L225 Difference]: With dead ends: 10382 [2021-07-09 18:41:39,561 INFO L226 Difference]: Without dead ends: 10079 [2021-07-09 18:41:39,562 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2404 ImplicationChecksByTransitivity, 3691.0ms TimeCoverageRelationStatistics Valid=964, Invalid=6518, Unknown=0, NotChecked=0, Total=7482 [2021-07-09 18:41:39,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10079 states. [2021-07-09 18:41:39,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10079 to 7386. [2021-07-09 18:41:39,682 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) [2021-07-09 18:41:39,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7386 states to 7386 states and 26665 transitions. [2021-07-09 18:41:39,699 INFO L78 Accepts]: Start accepts. Automaton has 7386 states and 26665 transitions. Word has length 32 [2021-07-09 18:41:39,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:39,699 INFO L482 AbstractCegarLoop]: Abstraction has 7386 states and 26665 transitions. [2021-07-09 18:41:39,699 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) [2021-07-09 18:41:39,699 INFO L276 IsEmpty]: Start isEmpty. Operand 7386 states and 26665 transitions. [2021-07-09 18:41:39,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:41:39,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:39,711 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] [2021-07-09 18:41:39,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:39,911 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:39,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:39,911 INFO L82 PathProgramCache]: Analyzing trace with hash -700345780, now seen corresponding path program 49 times [2021-07-09 18:41:39,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:39,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145698509] [2021-07-09 18:41:39,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:39,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:40,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:40,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145698509] [2021-07-09 18:41:40,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145698509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:40,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604134727] [2021-07-09 18:41:40,339 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 [2021-07-09 18:41:40,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:40,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:41:40,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:40,462 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 [2021-07-09 18:41:40,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:40,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:40,471 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. [2021-07-09 18:41:40,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-07-09 18:41:40,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:40,512 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 [2021-07-09 18:41:40,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:40,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:40,525 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. [2021-07-09 18:41:40,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:37 [2021-07-09 18:41:40,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:40,582 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-07-09 18:41:40,582 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 [2021-07-09 18:41:40,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:40,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:40,601 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. [2021-07-09 18:41:40,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:49 [2021-07-09 18:41:40,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:40,683 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-07-09 18:41:40,683 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 [2021-07-09 18:41:40,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:40,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:40,707 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. [2021-07-09 18:41:40,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:61 [2021-07-09 18:41:40,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:40,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:40,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:40,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:41:40,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:40,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:40,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:41:40,949 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 [2021-07-09 18:41:40,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:40,982 INFO L628 ElimStorePlain]: treesize reduction 7, result has 88.9 percent of original size [2021-07-09 18:41:40,990 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. [2021-07-09 18:41:40,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:71, output treesize:51 [2021-07-09 18:41:41,174 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:41,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604134727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:41,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:41,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2021-07-09 18:41:41,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959115686] [2021-07-09 18:41:41,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:41:41,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:41,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:41:41,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:41:41,175 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) [2021-07-09 18:41:42,042 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2021-07-09 18:41:43,451 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-07-09 18:41:44,850 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-07-09 18:41:48,403 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-07-09 18:41:52,378 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-07-09 18:41:54,993 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-07-09 18:41:56,227 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-07-09 18:41:57,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:57,800 INFO L93 Difference]: Finished difference Result 13949 states and 48004 transitions. [2021-07-09 18:41:57,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-09 18:41:57,801 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 [2021-07-09 18:41:57,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:57,830 INFO L225 Difference]: With dead ends: 13949 [2021-07-09 18:41:57,830 INFO L226 Difference]: Without dead ends: 12941 [2021-07-09 18:41:57,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 10019.2ms TimeCoverageRelationStatistics Valid=957, Invalid=4445, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 18:41:57,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12941 states. [2021-07-09 18:41:57,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12941 to 9690. [2021-07-09 18:41:58,006 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) [2021-07-09 18:41:58,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9690 states to 9690 states and 35048 transitions. [2021-07-09 18:41:58,031 INFO L78 Accepts]: Start accepts. Automaton has 9690 states and 35048 transitions. Word has length 32 [2021-07-09 18:41:58,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:58,031 INFO L482 AbstractCegarLoop]: Abstraction has 9690 states and 35048 transitions. [2021-07-09 18:41:58,031 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) [2021-07-09 18:41:58,031 INFO L276 IsEmpty]: Start isEmpty. Operand 9690 states and 35048 transitions. [2021-07-09 18:41:58,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:41:58,102 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:58,102 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] [2021-07-09 18:41:58,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-07-09 18:41:58,304 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:58,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:58,304 INFO L82 PathProgramCache]: Analyzing trace with hash -643597936, now seen corresponding path program 50 times [2021-07-09 18:41:58,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:58,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611759135] [2021-07-09 18:41:58,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:58,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:58,709 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:58,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:58,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611759135] [2021-07-09 18:41:58,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611759135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:58,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089696973] [2021-07-09 18:41:58,710 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 [2021-07-09 18:41:58,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:58,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:58,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:41:58,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:58,847 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 [2021-07-09 18:41:58,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:58,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:58,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:41:58,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-09 18:41:58,886 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 [2021-07-09 18:41:58,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:58,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:58,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:41:58,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:33 [2021-07-09 18:41:58,928 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 [2021-07-09 18:41:58,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:58,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:58,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:41:58,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-07-09 18:41:58,973 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 [2021-07-09 18:41:58,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:58,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:58,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:41:58,986 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-07-09 18:41:59,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:59,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:59,072 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-07-09 18:41:59,072 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 [2021-07-09 18:41:59,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:59,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:59,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:41:59,087 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-07-09 18:41:59,204 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:59,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089696973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:59,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:59,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-07-09 18:41:59,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721115198] [2021-07-09 18:41:59,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:41:59,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:59,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:41:59,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:41:59,205 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) [2021-07-09 18:42:00,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:00,246 INFO L93 Difference]: Finished difference Result 10881 states and 38680 transitions. [2021-07-09 18:42:00,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:42:00,246 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 [2021-07-09 18:42:00,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:00,269 INFO L225 Difference]: With dead ends: 10881 [2021-07-09 18:42:00,269 INFO L226 Difference]: Without dead ends: 10561 [2021-07-09 18:42:00,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1177.9ms TimeCoverageRelationStatistics Valid=299, Invalid=1863, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:42:00,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10561 states. [2021-07-09 18:42:00,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10561 to 9690. [2021-07-09 18:42:00,458 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) [2021-07-09 18:42:00,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9690 states to 9690 states and 34978 transitions. [2021-07-09 18:42:00,483 INFO L78 Accepts]: Start accepts. Automaton has 9690 states and 34978 transitions. Word has length 32 [2021-07-09 18:42:00,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:00,483 INFO L482 AbstractCegarLoop]: Abstraction has 9690 states and 34978 transitions. [2021-07-09 18:42:00,483 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) [2021-07-09 18:42:00,483 INFO L276 IsEmpty]: Start isEmpty. Operand 9690 states and 34978 transitions. [2021-07-09 18:42:00,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:42:00,499 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:00,499 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] [2021-07-09 18:42:00,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:00,700 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:00,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:00,700 INFO L82 PathProgramCache]: Analyzing trace with hash 42131912, now seen corresponding path program 51 times [2021-07-09 18:42:00,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:00,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688085009] [2021-07-09 18:42:00,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:01,161 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:01,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:01,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688085009] [2021-07-09 18:42:01,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688085009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:01,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79771221] [2021-07-09 18:42:01,162 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 [2021-07-09 18:42:01,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:42:01,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:01,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:42:01,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:01,289 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 [2021-07-09 18:42:01,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:01,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:01,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:42:01,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2021-07-09 18:42:01,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:01,332 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 [2021-07-09 18:42:01,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:01,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:01,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:42:01,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-07-09 18:42:01,373 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 [2021-07-09 18:42:01,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:01,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:01,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:42:01,383 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:24 [2021-07-09 18:42:01,436 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-07-09 18:42:01,436 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 [2021-07-09 18:42:01,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:01,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:01,449 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. [2021-07-09 18:42:01,450 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:36 [2021-07-09 18:42:01,525 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-07-09 18:42:01,526 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 [2021-07-09 18:42:01,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:01,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:01,539 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. [2021-07-09 18:42:01,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:43 [2021-07-09 18:42:01,628 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:42:01,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79771221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:01,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:01,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2021-07-09 18:42:01,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903341509] [2021-07-09 18:42:01,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:42:01,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:01,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:42:01,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:42:01,629 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) [2021-07-09 18:42:02,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:02,701 INFO L93 Difference]: Finished difference Result 13901 states and 49107 transitions. [2021-07-09 18:42:02,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:42:02,701 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 [2021-07-09 18:42:02,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:02,793 INFO L225 Difference]: With dead ends: 13901 [2021-07-09 18:42:02,793 INFO L226 Difference]: Without dead ends: 13475 [2021-07-09 18:42:02,793 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1055.4ms TimeCoverageRelationStatistics Valid=282, Invalid=1358, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:42:02,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13475 states. [2021-07-09 18:42:02,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13475 to 8431. [2021-07-09 18:42:02,924 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) [2021-07-09 18:42:02,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8431 states to 8431 states and 30261 transitions. [2021-07-09 18:42:02,944 INFO L78 Accepts]: Start accepts. Automaton has 8431 states and 30261 transitions. Word has length 32 [2021-07-09 18:42:02,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:02,944 INFO L482 AbstractCegarLoop]: Abstraction has 8431 states and 30261 transitions. [2021-07-09 18:42:02,944 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) [2021-07-09 18:42:02,945 INFO L276 IsEmpty]: Start isEmpty. Operand 8431 states and 30261 transitions. [2021-07-09 18:42:02,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:42:02,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:02,958 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] [2021-07-09 18:42:03,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:03,168 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:03,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:03,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1250586420, now seen corresponding path program 52 times [2021-07-09 18:42:03,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:03,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587373072] [2021-07-09 18:42:03,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:03,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:03,564 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:03,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:03,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587373072] [2021-07-09 18:42:03,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587373072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:03,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006529347] [2021-07-09 18:42:03,564 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 [2021-07-09 18:42:03,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:42:03,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:03,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:42:03,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:03,715 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 [2021-07-09 18:42:03,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:03,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:03,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:42:03,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-09 18:42:03,752 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 [2021-07-09 18:42:03,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:03,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:03,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:42:03,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-07-09 18:42:03,806 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-07-09 18:42:03,806 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 [2021-07-09 18:42:03,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:03,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:03,830 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. [2021-07-09 18:42:03,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:44 [2021-07-09 18:42:03,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:03,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:03,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:42:03,914 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 [2021-07-09 18:42:03,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:03,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:03,927 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. [2021-07-09 18:42:03,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:34 [2021-07-09 18:42:03,984 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:03,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006529347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:03,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:03,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-07-09 18:42:03,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709829829] [2021-07-09 18:42:03,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:42:03,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:03,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:42:03,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:42:03,985 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) [2021-07-09 18:42:04,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:04,724 INFO L93 Difference]: Finished difference Result 10312 states and 36179 transitions. [2021-07-09 18:42:04,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:42:04,724 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 [2021-07-09 18:42:04,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:04,748 INFO L225 Difference]: With dead ends: 10312 [2021-07-09 18:42:04,748 INFO L226 Difference]: Without dead ends: 10002 [2021-07-09 18:42:04,748 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 839.6ms TimeCoverageRelationStatistics Valid=241, Invalid=1241, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:42:04,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10002 states. [2021-07-09 18:42:04,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10002 to 8831. [2021-07-09 18:42:04,930 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) [2021-07-09 18:42:04,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8831 states to 8831 states and 31516 transitions. [2021-07-09 18:42:04,952 INFO L78 Accepts]: Start accepts. Automaton has 8831 states and 31516 transitions. Word has length 32 [2021-07-09 18:42:04,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:04,952 INFO L482 AbstractCegarLoop]: Abstraction has 8831 states and 31516 transitions. [2021-07-09 18:42:04,953 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) [2021-07-09 18:42:04,953 INFO L276 IsEmpty]: Start isEmpty. Operand 8831 states and 31516 transitions. [2021-07-09 18:42:04,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:42:04,967 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:04,967 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] [2021-07-09 18:42:05,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:05,167 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:05,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:05,168 INFO L82 PathProgramCache]: Analyzing trace with hash -564856572, now seen corresponding path program 53 times [2021-07-09 18:42:05,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:05,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696604082] [2021-07-09 18:42:05,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:05,611 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:05,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:05,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696604082] [2021-07-09 18:42:05,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696604082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:05,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733824203] [2021-07-09 18:42:05,611 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 [2021-07-09 18:42:05,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:42:05,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:05,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:42:05,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:05,721 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 [2021-07-09 18:42:05,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:05,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:05,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:42:05,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-07-09 18:42:05,750 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 [2021-07-09 18:42:05,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:05,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:05,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:42:05,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2021-07-09 18:42:05,801 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-07-09 18:42:05,801 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 [2021-07-09 18:42:05,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:05,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:05,814 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. [2021-07-09 18:42:05,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:36 [2021-07-09 18:42:05,904 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-07-09 18:42:05,904 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 [2021-07-09 18:42:05,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:05,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:05,920 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. [2021-07-09 18:42:05,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:51 [2021-07-09 18:42:06,105 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:06,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733824203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:06,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:06,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-07-09 18:42:06,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385270154] [2021-07-09 18:42:06,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:42:06,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:06,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:42:06,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:42:06,106 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) [2021-07-09 18:42:07,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:07,926 INFO L93 Difference]: Finished difference Result 16437 states and 56867 transitions. [2021-07-09 18:42:07,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:42:07,926 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 [2021-07-09 18:42:07,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:07,959 INFO L225 Difference]: With dead ends: 16437 [2021-07-09 18:42:07,959 INFO L226 Difference]: Without dead ends: 15835 [2021-07-09 18:42:07,960 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1440.7ms TimeCoverageRelationStatistics Valid=422, Invalid=2334, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:42:07,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15835 states. [2021-07-09 18:42:08,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15835 to 8581. [2021-07-09 18:42:08,130 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) [2021-07-09 18:42:08,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8581 states to 8581 states and 30408 transitions. [2021-07-09 18:42:08,151 INFO L78 Accepts]: Start accepts. Automaton has 8581 states and 30408 transitions. Word has length 32 [2021-07-09 18:42:08,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:08,152 INFO L482 AbstractCegarLoop]: Abstraction has 8581 states and 30408 transitions. [2021-07-09 18:42:08,152 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) [2021-07-09 18:42:08,152 INFO L276 IsEmpty]: Start isEmpty. Operand 8581 states and 30408 transitions. [2021-07-09 18:42:08,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:42:08,166 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:08,166 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] [2021-07-09 18:42:08,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-07-09 18:42:08,366 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:08,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:08,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1781126392, now seen corresponding path program 54 times [2021-07-09 18:42:08,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:08,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671928126] [2021-07-09 18:42:08,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:08,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:08,444 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:08,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:08,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671928126] [2021-07-09 18:42:08,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671928126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:08,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728517894] [2021-07-09 18:42:08,444 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 [2021-07-09 18:42:08,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:42:08,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:08,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:42:08,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:08,628 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:42:08,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728517894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:08,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:08,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-07-09 18:42:08,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685265126] [2021-07-09 18:42:08,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:42:08,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:08,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:42:08,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:42:08,629 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) [2021-07-09 18:42:11,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:11,780 INFO L93 Difference]: Finished difference Result 24214 states and 79256 transitions. [2021-07-09 18:42:11,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-07-09 18:42:11,780 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 [2021-07-09 18:42:11,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:11,838 INFO L225 Difference]: With dead ends: 24214 [2021-07-09 18:42:11,838 INFO L226 Difference]: Without dead ends: 24214 [2021-07-09 18:42:11,841 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7207 ImplicationChecksByTransitivity, 1956.6ms TimeCoverageRelationStatistics Valid=3677, Invalid=15505, Unknown=0, NotChecked=0, Total=19182 [2021-07-09 18:42:11,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24214 states. [2021-07-09 18:42:12,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24214 to 9398. [2021-07-09 18:42:12,183 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) [2021-07-09 18:42:12,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9398 states to 9398 states and 33941 transitions. [2021-07-09 18:42:12,206 INFO L78 Accepts]: Start accepts. Automaton has 9398 states and 33941 transitions. Word has length 36 [2021-07-09 18:42:12,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:12,206 INFO L482 AbstractCegarLoop]: Abstraction has 9398 states and 33941 transitions. [2021-07-09 18:42:12,206 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) [2021-07-09 18:42:12,206 INFO L276 IsEmpty]: Start isEmpty. Operand 9398 states and 33941 transitions. [2021-07-09 18:42:12,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:42:12,221 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:12,221 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] [2021-07-09 18:42:12,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:12,422 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:12,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:12,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1765665596, now seen corresponding path program 55 times [2021-07-09 18:42:12,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:12,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537783980] [2021-07-09 18:42:12,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:12,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:12,496 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:12,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:12,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537783980] [2021-07-09 18:42:12,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537783980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:12,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797170544] [2021-07-09 18:42:12,497 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 [2021-07-09 18:42:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:12,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:42:12,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:12,734 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:12,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797170544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:12,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:12,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:42:12,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209392435] [2021-07-09 18:42:12,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:42:12,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:12,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:42:12,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:42:12,735 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) [2021-07-09 18:42:14,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:14,404 INFO L93 Difference]: Finished difference Result 23183 states and 75907 transitions. [2021-07-09 18:42:14,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 18:42:14,405 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 [2021-07-09 18:42:14,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:14,457 INFO L225 Difference]: With dead ends: 23183 [2021-07-09 18:42:14,457 INFO L226 Difference]: Without dead ends: 23183 [2021-07-09 18:42:14,457 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2349 ImplicationChecksByTransitivity, 973.1ms TimeCoverageRelationStatistics Valid=1560, Invalid=5246, Unknown=0, NotChecked=0, Total=6806 [2021-07-09 18:42:14,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23183 states. [2021-07-09 18:42:14,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23183 to 9263. [2021-07-09 18:42:14,763 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) [2021-07-09 18:42:14,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9263 states to 9263 states and 33229 transitions. [2021-07-09 18:42:14,786 INFO L78 Accepts]: Start accepts. Automaton has 9263 states and 33229 transitions. Word has length 36 [2021-07-09 18:42:14,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:14,786 INFO L482 AbstractCegarLoop]: Abstraction has 9263 states and 33229 transitions. [2021-07-09 18:42:14,786 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) [2021-07-09 18:42:14,786 INFO L276 IsEmpty]: Start isEmpty. Operand 9263 states and 33229 transitions. [2021-07-09 18:42:14,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:42:14,801 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:14,801 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] [2021-07-09 18:42:15,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:15,002 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:15,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:15,002 INFO L82 PathProgramCache]: Analyzing trace with hash -610681024, now seen corresponding path program 56 times [2021-07-09 18:42:15,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:15,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920041065] [2021-07-09 18:42:15,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:15,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:15,066 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:15,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:15,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920041065] [2021-07-09 18:42:15,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920041065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:15,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874793865] [2021-07-09 18:42:15,067 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 [2021-07-09 18:42:15,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:42:15,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:15,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:42:15,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:15,239 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:15,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874793865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:15,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:15,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 18:42:15,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96512610] [2021-07-09 18:42:15,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:42:15,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:15,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:42:15,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:42:15,240 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) [2021-07-09 18:42:16,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:16,263 INFO L93 Difference]: Finished difference Result 19614 states and 64898 transitions. [2021-07-09 18:42:16,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:42:16,263 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 [2021-07-09 18:42:16,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:16,309 INFO L225 Difference]: With dead ends: 19614 [2021-07-09 18:42:16,309 INFO L226 Difference]: Without dead ends: 19614 [2021-07-09 18:42:16,309 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 588.6ms TimeCoverageRelationStatistics Valid=763, Invalid=2777, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:42:16,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19614 states. [2021-07-09 18:42:16,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19614 to 9363. [2021-07-09 18:42:16,578 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) [2021-07-09 18:42:16,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9363 states to 9363 states and 33519 transitions. [2021-07-09 18:42:16,600 INFO L78 Accepts]: Start accepts. Automaton has 9363 states and 33519 transitions. Word has length 36 [2021-07-09 18:42:16,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:16,600 INFO L482 AbstractCegarLoop]: Abstraction has 9363 states and 33519 transitions. [2021-07-09 18:42:16,600 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) [2021-07-09 18:42:16,600 INFO L276 IsEmpty]: Start isEmpty. Operand 9363 states and 33519 transitions. [2021-07-09 18:42:16,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:42:16,614 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:16,614 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] [2021-07-09 18:42:16,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-07-09 18:42:16,821 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:16,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:16,821 INFO L82 PathProgramCache]: Analyzing trace with hash -2146021892, now seen corresponding path program 57 times [2021-07-09 18:42:16,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:16,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989551561] [2021-07-09 18:42:16,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:16,891 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:16,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:16,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989551561] [2021-07-09 18:42:16,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989551561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:16,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163287965] [2021-07-09 18:42:16,892 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 [2021-07-09 18:42:16,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:42:16,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:16,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:42:16,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:16,999 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 [2021-07-09 18:42:17,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:17,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:17,009 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. [2021-07-09 18:42:17,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-07-09 18:42:17,046 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-07-09 18:42:17,046 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 [2021-07-09 18:42:17,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:17,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:17,059 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. [2021-07-09 18:42:17,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:37 [2021-07-09 18:42:17,165 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-07-09 18:42:17,165 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 [2021-07-09 18:42:17,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:17,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:17,253 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. [2021-07-09 18:42:17,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:46 [2021-07-09 18:42:17,356 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-07-09 18:42:17,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163287965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:17,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:17,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-07-09 18:42:17,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977350262] [2021-07-09 18:42:17,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:42:17,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:17,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:42:17,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:42:17,357 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) [2021-07-09 18:42:24,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:24,002 INFO L93 Difference]: Finished difference Result 23064 states and 74612 transitions. [2021-07-09 18:42:24,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-07-09 18:42:24,003 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 [2021-07-09 18:42:24,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:24,052 INFO L225 Difference]: With dead ends: 23064 [2021-07-09 18:42:24,052 INFO L226 Difference]: Without dead ends: 22846 [2021-07-09 18:42:24,053 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9982 ImplicationChecksByTransitivity, 3805.9ms TimeCoverageRelationStatistics Valid=3338, Invalid=23068, Unknown=0, NotChecked=0, Total=26406 [2021-07-09 18:42:24,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22846 states. [2021-07-09 18:42:24,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22846 to 10239. [2021-07-09 18:42:24,338 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) [2021-07-09 18:42:24,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10239 states to 10239 states and 37258 transitions. [2021-07-09 18:42:24,363 INFO L78 Accepts]: Start accepts. Automaton has 10239 states and 37258 transitions. Word has length 36 [2021-07-09 18:42:24,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:24,363 INFO L482 AbstractCegarLoop]: Abstraction has 10239 states and 37258 transitions. [2021-07-09 18:42:24,364 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) [2021-07-09 18:42:24,364 INFO L276 IsEmpty]: Start isEmpty. Operand 10239 states and 37258 transitions. [2021-07-09 18:42:24,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:42:24,380 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:24,380 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] [2021-07-09 18:42:24,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-09 18:42:24,581 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:24,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:24,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1242329482, now seen corresponding path program 58 times [2021-07-09 18:42:24,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:24,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997722041] [2021-07-09 18:42:24,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:24,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:24,630 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:24,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:24,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997722041] [2021-07-09 18:42:24,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997722041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:24,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315350139] [2021-07-09 18:42:24,631 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 [2021-07-09 18:42:24,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:42:24,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:24,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:42:24,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:24,819 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:42:24,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315350139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:24,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:24,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-09 18:42:24,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290945048] [2021-07-09 18:42:24,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:42:24,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:24,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:42:24,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:42:24,820 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) [2021-07-09 18:42:27,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:27,110 INFO L93 Difference]: Finished difference Result 24062 states and 79366 transitions. [2021-07-09 18:42:27,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-07-09 18:42:27,110 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 [2021-07-09 18:42:27,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:27,167 INFO L225 Difference]: With dead ends: 24062 [2021-07-09 18:42:27,167 INFO L226 Difference]: Without dead ends: 24054 [2021-07-09 18:42:27,168 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4827 ImplicationChecksByTransitivity, 1328.6ms TimeCoverageRelationStatistics Valid=2444, Invalid=10212, Unknown=0, NotChecked=0, Total=12656 [2021-07-09 18:42:27,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24054 states. [2021-07-09 18:42:27,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24054 to 10176. [2021-07-09 18:42:27,561 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) [2021-07-09 18:42:27,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10176 states to 10176 states and 36991 transitions. [2021-07-09 18:42:27,587 INFO L78 Accepts]: Start accepts. Automaton has 10176 states and 36991 transitions. Word has length 36 [2021-07-09 18:42:27,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:27,587 INFO L482 AbstractCegarLoop]: Abstraction has 10176 states and 36991 transitions. [2021-07-09 18:42:27,587 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) [2021-07-09 18:42:27,587 INFO L276 IsEmpty]: Start isEmpty. Operand 10176 states and 36991 transitions. [2021-07-09 18:42:27,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:42:27,603 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:27,603 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] [2021-07-09 18:42:27,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:27,804 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:27,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:27,804 INFO L82 PathProgramCache]: Analyzing trace with hash -999630980, now seen corresponding path program 59 times [2021-07-09 18:42:27,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:27,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835958174] [2021-07-09 18:42:27,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:27,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:27,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:27,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835958174] [2021-07-09 18:42:27,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835958174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:27,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688548087] [2021-07-09 18:42:27,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:42:27,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:42:27,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:27,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:42:27,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:28,029 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:42:28,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688548087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:28,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:28,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-09 18:42:28,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252979327] [2021-07-09 18:42:28,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:42:28,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:28,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:42:28,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:42:28,030 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) [2021-07-09 18:42:30,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:30,933 INFO L93 Difference]: Finished difference Result 27302 states and 90504 transitions. [2021-07-09 18:42:30,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-07-09 18:42:30,934 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 [2021-07-09 18:42:30,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:31,003 INFO L225 Difference]: With dead ends: 27302 [2021-07-09 18:42:31,003 INFO L226 Difference]: Without dead ends: 27302 [2021-07-09 18:42:31,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8677 ImplicationChecksByTransitivity, 1988.3ms TimeCoverageRelationStatistics Valid=3708, Invalid=17754, Unknown=0, NotChecked=0, Total=21462 [2021-07-09 18:42:31,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27302 states. [2021-07-09 18:42:31,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27302 to 10278. [2021-07-09 18:42:31,436 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) [2021-07-09 18:42:31,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10278 states to 10278 states and 37486 transitions. [2021-07-09 18:42:31,463 INFO L78 Accepts]: Start accepts. Automaton has 10278 states and 37486 transitions. Word has length 36 [2021-07-09 18:42:31,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:31,463 INFO L482 AbstractCegarLoop]: Abstraction has 10278 states and 37486 transitions. [2021-07-09 18:42:31,463 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) [2021-07-09 18:42:31,463 INFO L276 IsEmpty]: Start isEmpty. Operand 10278 states and 37486 transitions. [2021-07-09 18:42:31,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:42:31,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:31,481 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] [2021-07-09 18:42:31,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:31,681 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:31,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:31,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1594791238, now seen corresponding path program 60 times [2021-07-09 18:42:31,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:31,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010058662] [2021-07-09 18:42:31,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:31,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:31,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:31,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010058662] [2021-07-09 18:42:31,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010058662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:31,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186595731] [2021-07-09 18:42:31,734 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 [2021-07-09 18:42:31,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:42:31,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:31,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:42:31,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:31,905 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:31,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186595731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:31,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:31,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-07-09 18:42:31,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748046934] [2021-07-09 18:42:31,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:42:31,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:31,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:42:31,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:42:31,906 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) [2021-07-09 18:42:32,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:32,859 INFO L93 Difference]: Finished difference Result 23076 states and 77948 transitions. [2021-07-09 18:42:32,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:42:32,860 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 [2021-07-09 18:42:32,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:32,914 INFO L225 Difference]: With dead ends: 23076 [2021-07-09 18:42:32,915 INFO L226 Difference]: Without dead ends: 23064 [2021-07-09 18:42:32,915 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 539.1ms TimeCoverageRelationStatistics Valid=771, Invalid=2535, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:42:32,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23064 states. [2021-07-09 18:42:33,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23064 to 10277. [2021-07-09 18:42:33,350 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) [2021-07-09 18:42:33,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10277 states to 10277 states and 37481 transitions. [2021-07-09 18:42:33,382 INFO L78 Accepts]: Start accepts. Automaton has 10277 states and 37481 transitions. Word has length 36 [2021-07-09 18:42:33,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:33,382 INFO L482 AbstractCegarLoop]: Abstraction has 10277 states and 37481 transitions. [2021-07-09 18:42:33,383 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) [2021-07-09 18:42:33,383 INFO L276 IsEmpty]: Start isEmpty. Operand 10277 states and 37481 transitions. [2021-07-09 18:42:33,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:42:33,401 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:33,401 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] [2021-07-09 18:42:33,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:33,602 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:33,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:33,602 INFO L82 PathProgramCache]: Analyzing trace with hash 619738612, now seen corresponding path program 61 times [2021-07-09 18:42:33,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:33,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533938763] [2021-07-09 18:42:33,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:33,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:33,680 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:33,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:33,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533938763] [2021-07-09 18:42:33,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533938763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:33,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656253227] [2021-07-09 18:42:33,680 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 [2021-07-09 18:42:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:33,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:42:33,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:33,856 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:33,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656253227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:33,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:33,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-09 18:42:33,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21706659] [2021-07-09 18:42:33,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:42:33,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:33,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:42:33,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:42:33,857 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) [2021-07-09 18:42:34,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:34,711 INFO L93 Difference]: Finished difference Result 21184 states and 71447 transitions. [2021-07-09 18:42:34,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:42:34,711 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 [2021-07-09 18:42:34,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:34,761 INFO L225 Difference]: With dead ends: 21184 [2021-07-09 18:42:34,761 INFO L226 Difference]: Without dead ends: 21184 [2021-07-09 18:42:34,761 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 454.2ms TimeCoverageRelationStatistics Valid=579, Invalid=1971, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:42:34,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21184 states. [2021-07-09 18:42:35,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21184 to 10309. [2021-07-09 18:42:35,157 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) [2021-07-09 18:42:35,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10309 states to 10309 states and 37591 transitions. [2021-07-09 18:42:35,185 INFO L78 Accepts]: Start accepts. Automaton has 10309 states and 37591 transitions. Word has length 36 [2021-07-09 18:42:35,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:35,185 INFO L482 AbstractCegarLoop]: Abstraction has 10309 states and 37591 transitions. [2021-07-09 18:42:35,185 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) [2021-07-09 18:42:35,185 INFO L276 IsEmpty]: Start isEmpty. Operand 10309 states and 37591 transitions. [2021-07-09 18:42:35,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:42:35,202 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:35,202 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] [2021-07-09 18:42:35,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:35,403 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:35,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:35,403 INFO L82 PathProgramCache]: Analyzing trace with hash 334296516, now seen corresponding path program 62 times [2021-07-09 18:42:35,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:35,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146463556] [2021-07-09 18:42:35,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:35,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:35,470 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:35,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:35,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146463556] [2021-07-09 18:42:35,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146463556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:35,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789003692] [2021-07-09 18:42:35,471 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) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:35,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:42:35,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:35,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:42:35,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:35,662 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:35,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789003692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:35,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:35,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-09 18:42:35,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964520795] [2021-07-09 18:42:35,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:42:35,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:35,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:42:35,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:42:35,663 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) [2021-07-09 18:42:36,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:36,810 INFO L93 Difference]: Finished difference Result 22583 states and 75226 transitions. [2021-07-09 18:42:36,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 18:42:36,811 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 [2021-07-09 18:42:36,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:36,864 INFO L225 Difference]: With dead ends: 22583 [2021-07-09 18:42:36,864 INFO L226 Difference]: Without dead ends: 22583 [2021-07-09 18:42:36,865 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1627 ImplicationChecksByTransitivity, 733.7ms TimeCoverageRelationStatistics Valid=1128, Invalid=3984, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:42:36,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22583 states. [2021-07-09 18:42:37,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22583 to 10288. [2021-07-09 18:42:37,268 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) [2021-07-09 18:42:37,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10288 states to 10288 states and 37259 transitions. [2021-07-09 18:42:37,295 INFO L78 Accepts]: Start accepts. Automaton has 10288 states and 37259 transitions. Word has length 36 [2021-07-09 18:42:37,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:37,295 INFO L482 AbstractCegarLoop]: Abstraction has 10288 states and 37259 transitions. [2021-07-09 18:42:37,295 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) [2021-07-09 18:42:37,296 INFO L276 IsEmpty]: Start isEmpty. Operand 10288 states and 37259 transitions. [2021-07-09 18:42:37,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:42:37,313 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:37,313 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] [2021-07-09 18:42:37,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:37,513 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:37,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:37,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1645233024, now seen corresponding path program 63 times [2021-07-09 18:42:37,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:37,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22172990] [2021-07-09 18:42:37,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:37,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:37,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:37,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22172990] [2021-07-09 18:42:37,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22172990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:37,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126552895] [2021-07-09 18:42:37,580 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 [2021-07-09 18:42:37,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:42:37,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:37,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:42:37,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:37,719 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 [2021-07-09 18:42:37,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:37,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:37,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:42:37,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:22 [2021-07-09 18:42:37,759 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-07-09 18:42:37,760 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 [2021-07-09 18:42:37,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:37,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:37,771 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. [2021-07-09 18:42:37,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:34 [2021-07-09 18:42:37,847 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-07-09 18:42:37,847 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 [2021-07-09 18:42:37,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:37,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:37,864 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. [2021-07-09 18:42:37,864 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:49 [2021-07-09 18:42:38,016 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-07-09 18:42:38,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126552895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:38,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:38,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-07-09 18:42:38,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394180134] [2021-07-09 18:42:38,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:42:38,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:38,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:42:38,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:42:38,018 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) [2021-07-09 18:42:42,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:42,306 INFO L93 Difference]: Finished difference Result 20591 states and 67124 transitions. [2021-07-09 18:42:42,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-07-09 18:42:42,307 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 [2021-07-09 18:42:42,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:42,352 INFO L225 Difference]: With dead ends: 20591 [2021-07-09 18:42:42,352 INFO L226 Difference]: Without dead ends: 20576 [2021-07-09 18:42:42,354 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5098 ImplicationChecksByTransitivity, 2922.0ms TimeCoverageRelationStatistics Valid=1942, Invalid=12578, Unknown=0, NotChecked=0, Total=14520 [2021-07-09 18:42:42,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20576 states. [2021-07-09 18:42:42,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20576 to 11680. [2021-07-09 18:42:42,642 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) [2021-07-09 18:42:42,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11680 states to 11680 states and 41465 transitions. [2021-07-09 18:42:42,671 INFO L78 Accepts]: Start accepts. Automaton has 11680 states and 41465 transitions. Word has length 36 [2021-07-09 18:42:42,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:42,671 INFO L482 AbstractCegarLoop]: Abstraction has 11680 states and 41465 transitions. [2021-07-09 18:42:42,671 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) [2021-07-09 18:42:42,672 INFO L276 IsEmpty]: Start isEmpty. Operand 11680 states and 41465 transitions. [2021-07-09 18:42:42,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:42:42,690 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:42,690 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] [2021-07-09 18:42:42,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-07-09 18:42:42,891 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:42,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:42,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1594356878, now seen corresponding path program 64 times [2021-07-09 18:42:42,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:42,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937210277] [2021-07-09 18:42:42,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:42,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:43,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:43,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937210277] [2021-07-09 18:42:43,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937210277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:43,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048449591] [2021-07-09 18:42:43,020 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 [2021-07-09 18:42:43,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:42:43,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:43,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:42:43,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:43,207 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:42:43,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048449591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:43,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:43,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:42:43,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116401091] [2021-07-09 18:42:43,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:42:43,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:43,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:42:43,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:42:43,208 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) [2021-07-09 18:42:45,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:45,574 INFO L93 Difference]: Finished difference Result 24526 states and 80567 transitions. [2021-07-09 18:42:45,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-07-09 18:42:45,574 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 [2021-07-09 18:42:45,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:45,630 INFO L225 Difference]: With dead ends: 24526 [2021-07-09 18:42:45,630 INFO L226 Difference]: Without dead ends: 24518 [2021-07-09 18:42:45,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5034 ImplicationChecksByTransitivity, 1469.3ms TimeCoverageRelationStatistics Valid=2276, Invalid=11766, Unknown=0, NotChecked=0, Total=14042 [2021-07-09 18:42:45,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24518 states. [2021-07-09 18:42:46,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24518 to 10224. [2021-07-09 18:42:46,065 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) [2021-07-09 18:42:46,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10224 states to 10224 states and 36567 transitions. [2021-07-09 18:42:46,094 INFO L78 Accepts]: Start accepts. Automaton has 10224 states and 36567 transitions. Word has length 36 [2021-07-09 18:42:46,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:46,094 INFO L482 AbstractCegarLoop]: Abstraction has 10224 states and 36567 transitions. [2021-07-09 18:42:46,094 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) [2021-07-09 18:42:46,094 INFO L276 IsEmpty]: Start isEmpty. Operand 10224 states and 36567 transitions. [2021-07-09 18:42:46,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:42:46,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:46,111 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] [2021-07-09 18:42:46,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:46,312 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:46,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:46,312 INFO L82 PathProgramCache]: Analyzing trace with hash 649769798, now seen corresponding path program 22 times [2021-07-09 18:42:46,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:46,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117170223] [2021-07-09 18:42:46,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:46,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:46,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117170223] [2021-07-09 18:42:46,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117170223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:46,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029912126] [2021-07-09 18:42:46,379 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 [2021-07-09 18:42:46,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:42:46,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:46,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:42:46,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:46,549 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:46,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029912126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:46,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:46,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-07-09 18:42:46,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330703290] [2021-07-09 18:42:46,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:42:46,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:46,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:42:46,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:42:46,550 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) [2021-07-09 18:42:47,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:47,787 INFO L93 Difference]: Finished difference Result 23351 states and 75809 transitions. [2021-07-09 18:42:47,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-09 18:42:47,787 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 [2021-07-09 18:42:47,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:47,840 INFO L225 Difference]: With dead ends: 23351 [2021-07-09 18:42:47,841 INFO L226 Difference]: Without dead ends: 23351 [2021-07-09 18:42:47,841 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1978 ImplicationChecksByTransitivity, 775.1ms TimeCoverageRelationStatistics Valid=1338, Invalid=4514, Unknown=0, NotChecked=0, Total=5852 [2021-07-09 18:42:47,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23351 states. [2021-07-09 18:42:48,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23351 to 10314. [2021-07-09 18:42:48,205 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) [2021-07-09 18:42:48,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10314 states to 10314 states and 36824 transitions. [2021-07-09 18:42:48,231 INFO L78 Accepts]: Start accepts. Automaton has 10314 states and 36824 transitions. Word has length 36 [2021-07-09 18:42:48,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:48,231 INFO L482 AbstractCegarLoop]: Abstraction has 10314 states and 36824 transitions. [2021-07-09 18:42:48,232 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) [2021-07-09 18:42:48,232 INFO L276 IsEmpty]: Start isEmpty. Operand 10314 states and 36824 transitions. [2021-07-09 18:42:48,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:42:48,248 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:48,248 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] [2021-07-09 18:42:48,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-07-09 18:42:48,449 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:48,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:48,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1914163660, now seen corresponding path program 23 times [2021-07-09 18:42:48,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:48,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806436270] [2021-07-09 18:42:48,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:48,500 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:48,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:48,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806436270] [2021-07-09 18:42:48,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806436270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:48,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414283964] [2021-07-09 18:42:48,501 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 [2021-07-09 18:42:48,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:42:48,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:48,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:42:48,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:48,684 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:42:48,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414283964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:48,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:48,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 18:42:48,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407098341] [2021-07-09 18:42:48,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:42:48,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:48,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:42:48,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:42:48,685 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) [2021-07-09 18:42:52,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:52,191 INFO L93 Difference]: Finished difference Result 25345 states and 80932 transitions. [2021-07-09 18:42:52,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-07-09 18:42:52,191 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 [2021-07-09 18:42:52,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:52,252 INFO L225 Difference]: With dead ends: 25345 [2021-07-09 18:42:52,252 INFO L226 Difference]: Without dead ends: 25341 [2021-07-09 18:42:52,254 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12290 ImplicationChecksByTransitivity, 2424.9ms TimeCoverageRelationStatistics Valid=4827, Invalid=25275, Unknown=0, NotChecked=0, Total=30102 [2021-07-09 18:42:52,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25341 states. [2021-07-09 18:42:52,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25341 to 10697. [2021-07-09 18:42:52,597 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) [2021-07-09 18:42:52,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10697 states to 10697 states and 37791 transitions. [2021-07-09 18:42:52,624 INFO L78 Accepts]: Start accepts. Automaton has 10697 states and 37791 transitions. Word has length 36 [2021-07-09 18:42:52,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:52,624 INFO L482 AbstractCegarLoop]: Abstraction has 10697 states and 37791 transitions. [2021-07-09 18:42:52,624 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) [2021-07-09 18:42:52,624 INFO L276 IsEmpty]: Start isEmpty. Operand 10697 states and 37791 transitions. [2021-07-09 18:42:52,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:42:52,640 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:52,640 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] [2021-07-09 18:42:52,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-07-09 18:42:52,841 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:52,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:52,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1955379200, now seen corresponding path program 65 times [2021-07-09 18:42:52,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:52,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976316292] [2021-07-09 18:42:52,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:52,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:52,882 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:42:52,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:52,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976316292] [2021-07-09 18:42:52,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976316292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:52,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805243055] [2021-07-09 18:42:52,883 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 [2021-07-09 18:42:52,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:42:52,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:52,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:42:52,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:53,043 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:53,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805243055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:53,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:53,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-09 18:42:53,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857429532] [2021-07-09 18:42:53,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:42:53,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:53,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:42:53,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:42:53,044 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) [2021-07-09 18:42:54,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:54,137 INFO L93 Difference]: Finished difference Result 28584 states and 95318 transitions. [2021-07-09 18:42:54,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:42:54,138 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 [2021-07-09 18:42:54,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:54,207 INFO L225 Difference]: With dead ends: 28584 [2021-07-09 18:42:54,207 INFO L226 Difference]: Without dead ends: 28584 [2021-07-09 18:42:54,207 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 580.1ms TimeCoverageRelationStatistics Valid=1025, Invalid=2757, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:42:54,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28584 states. [2021-07-09 18:42:54,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28584 to 11040. [2021-07-09 18:42:54,602 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) [2021-07-09 18:42:54,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11040 states to 11040 states and 39373 transitions. [2021-07-09 18:42:54,631 INFO L78 Accepts]: Start accepts. Automaton has 11040 states and 39373 transitions. Word has length 36 [2021-07-09 18:42:54,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:54,631 INFO L482 AbstractCegarLoop]: Abstraction has 11040 states and 39373 transitions. [2021-07-09 18:42:54,631 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) [2021-07-09 18:42:54,631 INFO L276 IsEmpty]: Start isEmpty. Operand 11040 states and 39373 transitions. [2021-07-09 18:42:54,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:42:54,649 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:54,649 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] [2021-07-09 18:42:54,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:54,850 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:54,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:54,850 INFO L82 PathProgramCache]: Analyzing trace with hash 835382162, now seen corresponding path program 66 times [2021-07-09 18:42:54,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:54,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613846184] [2021-07-09 18:42:54,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:54,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:54,891 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:54,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:54,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613846184] [2021-07-09 18:42:54,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613846184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:54,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977742348] [2021-07-09 18:42:54,892 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 [2021-07-09 18:42:54,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:42:54,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:54,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:42:54,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:55,086 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:42:55,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977742348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:55,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:55,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-09 18:42:55,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490605467] [2021-07-09 18:42:55,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:42:55,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:55,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:42:55,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:42:55,088 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) [2021-07-09 18:42:57,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:57,252 INFO L93 Difference]: Finished difference Result 28065 states and 91868 transitions. [2021-07-09 18:42:57,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-07-09 18:42:57,252 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 [2021-07-09 18:42:57,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:57,321 INFO L225 Difference]: With dead ends: 28065 [2021-07-09 18:42:57,321 INFO L226 Difference]: Without dead ends: 28057 [2021-07-09 18:42:57,322 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4765 ImplicationChecksByTransitivity, 1326.7ms TimeCoverageRelationStatistics Valid=2261, Invalid=10171, Unknown=0, NotChecked=0, Total=12432 [2021-07-09 18:42:57,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28057 states. [2021-07-09 18:42:57,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28057 to 11031. [2021-07-09 18:42:57,696 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) [2021-07-09 18:42:57,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11031 states to 11031 states and 39324 transitions. [2021-07-09 18:42:57,723 INFO L78 Accepts]: Start accepts. Automaton has 11031 states and 39324 transitions. Word has length 36 [2021-07-09 18:42:57,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:57,723 INFO L482 AbstractCegarLoop]: Abstraction has 11031 states and 39324 transitions. [2021-07-09 18:42:57,723 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) [2021-07-09 18:42:57,723 INFO L276 IsEmpty]: Start isEmpty. Operand 11031 states and 39324 transitions. [2021-07-09 18:42:57,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:42:57,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:57,741 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] [2021-07-09 18:42:57,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:57,941 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:57,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:57,942 INFO L82 PathProgramCache]: Analyzing trace with hash -645736056, now seen corresponding path program 67 times [2021-07-09 18:42:57,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:57,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693303564] [2021-07-09 18:42:57,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:58,003 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:58,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:58,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693303564] [2021-07-09 18:42:58,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693303564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:58,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737191870] [2021-07-09 18:42:58,004 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 [2021-07-09 18:42:58,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:58,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:42:58,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:58,223 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:58,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737191870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:58,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:58,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-07-09 18:42:58,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301049262] [2021-07-09 18:42:58,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:42:58,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:58,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:42:58,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:42:58,225 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) [2021-07-09 18:42:59,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:59,628 INFO L93 Difference]: Finished difference Result 25852 states and 84621 transitions. [2021-07-09 18:42:59,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-09 18:42:59,628 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 [2021-07-09 18:42:59,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:59,691 INFO L225 Difference]: With dead ends: 25852 [2021-07-09 18:42:59,691 INFO L226 Difference]: Without dead ends: 25852 [2021-07-09 18:42:59,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 920.4ms TimeCoverageRelationStatistics Valid=1383, Invalid=4019, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 18:42:59,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25852 states. [2021-07-09 18:43:00,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25852 to 11109. [2021-07-09 18:43:00,031 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) [2021-07-09 18:43:00,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11109 states to 11109 states and 39567 transitions. [2021-07-09 18:43:00,060 INFO L78 Accepts]: Start accepts. Automaton has 11109 states and 39567 transitions. Word has length 36 [2021-07-09 18:43:00,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:00,060 INFO L482 AbstractCegarLoop]: Abstraction has 11109 states and 39567 transitions. [2021-07-09 18:43:00,060 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) [2021-07-09 18:43:00,060 INFO L276 IsEmpty]: Start isEmpty. Operand 11109 states and 39567 transitions. [2021-07-09 18:43:00,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:43:00,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:00,079 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] [2021-07-09 18:43:00,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:00,279 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:00,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:00,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1701113450, now seen corresponding path program 68 times [2021-07-09 18:43:00,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:00,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194713923] [2021-07-09 18:43:00,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:00,339 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:00,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:00,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194713923] [2021-07-09 18:43:00,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194713923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:00,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188509505] [2021-07-09 18:43:00,339 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 [2021-07-09 18:43:00,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:43:00,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:00,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:43:00,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:00,561 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:43:00,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188509505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:00,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:00,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 18:43:00,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767693073] [2021-07-09 18:43:00,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:43:00,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:00,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:43:00,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:43:00,563 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) [2021-07-09 18:43:03,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:03,147 INFO L93 Difference]: Finished difference Result 26133 states and 85715 transitions. [2021-07-09 18:43:03,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-07-09 18:43:03,148 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 [2021-07-09 18:43:03,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:03,211 INFO L225 Difference]: With dead ends: 26133 [2021-07-09 18:43:03,211 INFO L226 Difference]: Without dead ends: 26125 [2021-07-09 18:43:03,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5792 ImplicationChecksByTransitivity, 1606.7ms TimeCoverageRelationStatistics Valid=2641, Invalid=12859, Unknown=0, NotChecked=0, Total=15500 [2021-07-09 18:43:03,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26125 states. [2021-07-09 18:43:03,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26125 to 10815. [2021-07-09 18:43:03,565 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) [2021-07-09 18:43:03,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10815 states to 10815 states and 38389 transitions. [2021-07-09 18:43:03,592 INFO L78 Accepts]: Start accepts. Automaton has 10815 states and 38389 transitions. Word has length 36 [2021-07-09 18:43:03,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:03,592 INFO L482 AbstractCegarLoop]: Abstraction has 10815 states and 38389 transitions. [2021-07-09 18:43:03,592 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) [2021-07-09 18:43:03,592 INFO L276 IsEmpty]: Start isEmpty. Operand 10815 states and 38389 transitions. [2021-07-09 18:43:03,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:43:03,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:03,609 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] [2021-07-09 18:43:03,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-07-09 18:43:03,810 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:03,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:03,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1129408980, now seen corresponding path program 69 times [2021-07-09 18:43:03,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:03,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283173389] [2021-07-09 18:43:03,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:03,889 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:03,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:03,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283173389] [2021-07-09 18:43:03,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283173389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:03,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786274221] [2021-07-09 18:43:03,890 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 [2021-07-09 18:43:03,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 18:43:03,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:03,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:43:03,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:04,062 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:04,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786274221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:04,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:04,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-09 18:43:04,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846851279] [2021-07-09 18:43:04,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:43:04,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:04,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:43:04,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:43:04,064 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) [2021-07-09 18:43:05,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:05,863 INFO L93 Difference]: Finished difference Result 25481 states and 83280 transitions. [2021-07-09 18:43:05,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-07-09 18:43:05,864 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 [2021-07-09 18:43:05,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:05,925 INFO L225 Difference]: With dead ends: 25481 [2021-07-09 18:43:05,925 INFO L226 Difference]: Without dead ends: 25421 [2021-07-09 18:43:05,926 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3412 ImplicationChecksByTransitivity, 1077.1ms TimeCoverageRelationStatistics Valid=1884, Invalid=7622, Unknown=0, NotChecked=0, Total=9506 [2021-07-09 18:43:05,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25421 states. [2021-07-09 18:43:06,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25421 to 10825. [2021-07-09 18:43:06,266 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) [2021-07-09 18:43:06,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10825 states to 10825 states and 38420 transitions. [2021-07-09 18:43:06,294 INFO L78 Accepts]: Start accepts. Automaton has 10825 states and 38420 transitions. Word has length 36 [2021-07-09 18:43:06,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:06,295 INFO L482 AbstractCegarLoop]: Abstraction has 10825 states and 38420 transitions. [2021-07-09 18:43:06,295 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) [2021-07-09 18:43:06,295 INFO L276 IsEmpty]: Start isEmpty. Operand 10825 states and 38420 transitions. [2021-07-09 18:43:06,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:43:06,313 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:06,313 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] [2021-07-09 18:43:06,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:06,514 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:06,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:06,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1944063276, now seen corresponding path program 70 times [2021-07-09 18:43:06,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:06,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583738749] [2021-07-09 18:43:06,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:06,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:06,568 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:06,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:06,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583738749] [2021-07-09 18:43:06,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583738749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:06,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139315704] [2021-07-09 18:43:06,568 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) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:06,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:43:06,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:06,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:43:06,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:06,745 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:06,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139315704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:06,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:06,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-09 18:43:06,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293676512] [2021-07-09 18:43:06,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:43:06,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:06,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:43:06,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:43:06,746 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) [2021-07-09 18:43:07,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:07,929 INFO L93 Difference]: Finished difference Result 25553 states and 83090 transitions. [2021-07-09 18:43:07,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:43:07,930 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 [2021-07-09 18:43:07,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:07,991 INFO L225 Difference]: With dead ends: 25553 [2021-07-09 18:43:07,992 INFO L226 Difference]: Without dead ends: 25553 [2021-07-09 18:43:07,992 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 660.4ms TimeCoverageRelationStatistics Valid=1205, Invalid=3625, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:43:08,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25553 states. [2021-07-09 18:43:08,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25553 to 11156. [2021-07-09 18:43:08,360 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) [2021-07-09 18:43:08,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11156 states to 11156 states and 39363 transitions. [2021-07-09 18:43:08,388 INFO L78 Accepts]: Start accepts. Automaton has 11156 states and 39363 transitions. Word has length 36 [2021-07-09 18:43:08,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:08,388 INFO L482 AbstractCegarLoop]: Abstraction has 11156 states and 39363 transitions. [2021-07-09 18:43:08,388 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) [2021-07-09 18:43:08,388 INFO L276 IsEmpty]: Start isEmpty. Operand 11156 states and 39363 transitions. [2021-07-09 18:43:08,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:43:08,406 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:08,406 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] [2021-07-09 18:43:08,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-07-09 18:43:08,607 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:08,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:08,607 INFO L82 PathProgramCache]: Analyzing trace with hash -417474388, now seen corresponding path program 71 times [2021-07-09 18:43:08,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:08,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766461388] [2021-07-09 18:43:08,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:08,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:08,655 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:08,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:08,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766461388] [2021-07-09 18:43:08,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766461388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:08,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40138912] [2021-07-09 18:43:08,655 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 [2021-07-09 18:43:08,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 18:43:08,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:08,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:43:08,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:08,827 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:08,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40138912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:08,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:08,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-07-09 18:43:08,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284352685] [2021-07-09 18:43:08,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:43:08,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:08,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:43:08,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:43:08,828 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) [2021-07-09 18:43:10,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:10,750 INFO L93 Difference]: Finished difference Result 24060 states and 79445 transitions. [2021-07-09 18:43:10,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-07-09 18:43:10,750 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 [2021-07-09 18:43:10,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:10,803 INFO L225 Difference]: With dead ends: 24060 [2021-07-09 18:43:10,803 INFO L226 Difference]: Without dead ends: 23988 [2021-07-09 18:43:10,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3341 ImplicationChecksByTransitivity, 1157.1ms TimeCoverageRelationStatistics Valid=1989, Invalid=7323, Unknown=0, NotChecked=0, Total=9312 [2021-07-09 18:43:10,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23988 states. [2021-07-09 18:43:11,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23988 to 11635. [2021-07-09 18:43:11,126 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) [2021-07-09 18:43:11,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11635 states to 11635 states and 41153 transitions. [2021-07-09 18:43:11,157 INFO L78 Accepts]: Start accepts. Automaton has 11635 states and 41153 transitions. Word has length 36 [2021-07-09 18:43:11,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:11,158 INFO L482 AbstractCegarLoop]: Abstraction has 11635 states and 41153 transitions. [2021-07-09 18:43:11,158 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) [2021-07-09 18:43:11,158 INFO L276 IsEmpty]: Start isEmpty. Operand 11635 states and 41153 transitions. [2021-07-09 18:43:11,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:43:11,176 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:11,176 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] [2021-07-09 18:43:11,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:11,377 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:11,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:11,377 INFO L82 PathProgramCache]: Analyzing trace with hash -56872508, now seen corresponding path program 72 times [2021-07-09 18:43:11,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:11,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552390015] [2021-07-09 18:43:11,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:11,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:43:11,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:11,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552390015] [2021-07-09 18:43:11,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552390015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:11,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221559069] [2021-07-09 18:43:11,427 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 [2021-07-09 18:43:11,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:43:11,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:11,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:43:11,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:11,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221559069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:11,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:11,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-09 18:43:11,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340387499] [2021-07-09 18:43:11,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:43:11,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:11,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:43:11,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:43:11,621 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) [2021-07-09 18:43:14,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:14,251 INFO L93 Difference]: Finished difference Result 32188 states and 105890 transitions. [2021-07-09 18:43:14,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-07-09 18:43:14,252 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 [2021-07-09 18:43:14,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:14,334 INFO L225 Difference]: With dead ends: 32188 [2021-07-09 18:43:14,334 INFO L226 Difference]: Without dead ends: 32188 [2021-07-09 18:43:14,336 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7629 ImplicationChecksByTransitivity, 1809.5ms TimeCoverageRelationStatistics Valid=3449, Invalid=15183, Unknown=0, NotChecked=0, Total=18632 [2021-07-09 18:43:14,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32188 states. [2021-07-09 18:43:14,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32188 to 11859. [2021-07-09 18:43:14,781 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) [2021-07-09 18:43:14,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11859 states to 11859 states and 42011 transitions. [2021-07-09 18:43:14,812 INFO L78 Accepts]: Start accepts. Automaton has 11859 states and 42011 transitions. Word has length 36 [2021-07-09 18:43:14,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:14,812 INFO L482 AbstractCegarLoop]: Abstraction has 11859 states and 42011 transitions. [2021-07-09 18:43:14,812 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) [2021-07-09 18:43:14,812 INFO L276 IsEmpty]: Start isEmpty. Operand 11859 states and 42011 transitions. [2021-07-09 18:43:14,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:43:14,832 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:14,832 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] [2021-07-09 18:43:15,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:15,033 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:15,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:15,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1328456694, now seen corresponding path program 73 times [2021-07-09 18:43:15,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:15,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735648444] [2021-07-09 18:43:15,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:15,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:15,083 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:15,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:15,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735648444] [2021-07-09 18:43:15,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735648444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:15,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135656969] [2021-07-09 18:43:15,083 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 [2021-07-09 18:43:15,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:15,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:43:15,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:15,257 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:15,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135656969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:15,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:15,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-07-09 18:43:15,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677807869] [2021-07-09 18:43:15,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:43:15,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:15,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:43:15,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:43:15,259 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) [2021-07-09 18:43:16,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:16,214 INFO L93 Difference]: Finished difference Result 21337 states and 71691 transitions. [2021-07-09 18:43:16,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:43:16,214 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 [2021-07-09 18:43:16,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:16,281 INFO L225 Difference]: With dead ends: 21337 [2021-07-09 18:43:16,281 INFO L226 Difference]: Without dead ends: 21337 [2021-07-09 18:43:16,281 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 487.8ms TimeCoverageRelationStatistics Valid=705, Invalid=2375, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:43:16,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21337 states. [2021-07-09 18:43:16,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21337 to 12014. [2021-07-09 18:43:16,601 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) [2021-07-09 18:43:16,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12014 states to 12014 states and 42515 transitions. [2021-07-09 18:43:16,631 INFO L78 Accepts]: Start accepts. Automaton has 12014 states and 42515 transitions. Word has length 36 [2021-07-09 18:43:16,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:16,631 INFO L482 AbstractCegarLoop]: Abstraction has 12014 states and 42515 transitions. [2021-07-09 18:43:16,631 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) [2021-07-09 18:43:16,631 INFO L276 IsEmpty]: Start isEmpty. Operand 12014 states and 42515 transitions. [2021-07-09 18:43:16,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:43:16,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:16,650 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] [2021-07-09 18:43:16,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-07-09 18:43:16,872 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:16,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:16,872 INFO L82 PathProgramCache]: Analyzing trace with hash -757061290, now seen corresponding path program 74 times [2021-07-09 18:43:16,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:16,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311274867] [2021-07-09 18:43:16,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:16,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:16,921 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:16,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:16,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311274867] [2021-07-09 18:43:16,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311274867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:16,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255879502] [2021-07-09 18:43:16,922 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 [2021-07-09 18:43:16,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:43:16,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:16,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:43:16,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:17,088 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:43:17,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255879502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:17,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:17,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-07-09 18:43:17,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829015181] [2021-07-09 18:43:17,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:43:17,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:17,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:43:17,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:43:17,089 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) [2021-07-09 18:43:18,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:18,963 INFO L93 Difference]: Finished difference Result 23584 states and 78972 transitions. [2021-07-09 18:43:18,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-07-09 18:43:18,963 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 [2021-07-09 18:43:18,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:19,017 INFO L225 Difference]: With dead ends: 23584 [2021-07-09 18:43:19,017 INFO L226 Difference]: Without dead ends: 23568 [2021-07-09 18:43:19,018 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4149 ImplicationChecksByTransitivity, 1173.5ms TimeCoverageRelationStatistics Valid=2031, Invalid=9311, Unknown=0, NotChecked=0, Total=11342 [2021-07-09 18:43:19,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23568 states. [2021-07-09 18:43:19,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23568 to 12014. [2021-07-09 18:43:19,336 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) [2021-07-09 18:43:19,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12014 states to 12014 states and 42511 transitions. [2021-07-09 18:43:19,365 INFO L78 Accepts]: Start accepts. Automaton has 12014 states and 42511 transitions. Word has length 36 [2021-07-09 18:43:19,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:19,365 INFO L482 AbstractCegarLoop]: Abstraction has 12014 states and 42511 transitions. [2021-07-09 18:43:19,365 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) [2021-07-09 18:43:19,365 INFO L276 IsEmpty]: Start isEmpty. Operand 12014 states and 42511 transitions. [2021-07-09 18:43:19,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:43:19,384 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:19,384 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] [2021-07-09 18:43:19,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:19,586 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:19,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:19,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1893700292, now seen corresponding path program 24 times [2021-07-09 18:43:19,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:19,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603867787] [2021-07-09 18:43:19,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:19,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:19,639 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:43:19,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:19,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603867787] [2021-07-09 18:43:19,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603867787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:19,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633608397] [2021-07-09 18:43:19,640 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 [2021-07-09 18:43:19,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:43:19,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:19,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:43:19,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:19,816 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:43:19,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633608397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:19,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:19,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 18:43:19,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90550347] [2021-07-09 18:43:19,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:43:19,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:19,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:43:19,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:43:19,817 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) [2021-07-09 18:43:23,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:23,701 INFO L93 Difference]: Finished difference Result 24185 states and 80281 transitions. [2021-07-09 18:43:23,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2021-07-09 18:43:23,701 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 [2021-07-09 18:43:23,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:23,758 INFO L225 Difference]: With dead ends: 24185 [2021-07-09 18:43:23,758 INFO L226 Difference]: Without dead ends: 24161 [2021-07-09 18:43:23,762 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15417 ImplicationChecksByTransitivity, 2858.2ms TimeCoverageRelationStatistics Valid=5544, Invalid=31128, Unknown=0, NotChecked=0, Total=36672 [2021-07-09 18:43:23,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24161 states. [2021-07-09 18:43:24,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24161 to 12318. [2021-07-09 18:43:24,101 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) [2021-07-09 18:43:24,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12318 states to 12318 states and 43392 transitions. [2021-07-09 18:43:24,134 INFO L78 Accepts]: Start accepts. Automaton has 12318 states and 43392 transitions. Word has length 36 [2021-07-09 18:43:24,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:24,134 INFO L482 AbstractCegarLoop]: Abstraction has 12318 states and 43392 transitions. [2021-07-09 18:43:24,134 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) [2021-07-09 18:43:24,134 INFO L276 IsEmpty]: Start isEmpty. Operand 12318 states and 43392 transitions. [2021-07-09 18:43:24,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:43:24,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:24,154 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] [2021-07-09 18:43:24,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:24,354 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:24,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:24,354 INFO L82 PathProgramCache]: Analyzing trace with hash 14650632, now seen corresponding path program 75 times [2021-07-09 18:43:24,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:24,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361172762] [2021-07-09 18:43:24,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:24,487 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:24,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:24,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361172762] [2021-07-09 18:43:24,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361172762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:24,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598142979] [2021-07-09 18:43:24,487 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 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 [2021-07-09 18:43:24,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 18:43:24,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:24,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:43:24,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:24,654 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:24,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598142979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:24,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:24,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-07-09 18:43:24,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934332669] [2021-07-09 18:43:24,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:43:24,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:24,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:43:24,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:43:24,655 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) [2021-07-09 18:43:25,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:25,832 INFO L93 Difference]: Finished difference Result 30224 states and 99175 transitions. [2021-07-09 18:43:25,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:43:25,832 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 [2021-07-09 18:43:25,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:25,908 INFO L225 Difference]: With dead ends: 30224 [2021-07-09 18:43:25,908 INFO L226 Difference]: Without dead ends: 30224 [2021-07-09 18:43:25,909 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 723.2ms TimeCoverageRelationStatistics Valid=959, Invalid=2701, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:43:25,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30224 states. [2021-07-09 18:43:26,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30224 to 13376. [2021-07-09 18:43:26,343 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) [2021-07-09 18:43:26,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13376 states to 13376 states and 47354 transitions. [2021-07-09 18:43:26,379 INFO L78 Accepts]: Start accepts. Automaton has 13376 states and 47354 transitions. Word has length 36 [2021-07-09 18:43:26,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:26,379 INFO L482 AbstractCegarLoop]: Abstraction has 13376 states and 47354 transitions. [2021-07-09 18:43:26,379 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) [2021-07-09 18:43:26,379 INFO L276 IsEmpty]: Start isEmpty. Operand 13376 states and 47354 transitions. [2021-07-09 18:43:26,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:43:26,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:26,402 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] [2021-07-09 18:43:26,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-09 18:43:26,602 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:26,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:26,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1040726762, now seen corresponding path program 76 times [2021-07-09 18:43:26,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:26,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090990022] [2021-07-09 18:43:26,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:26,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:26,658 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:26,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:26,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090990022] [2021-07-09 18:43:26,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090990022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:26,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773304068] [2021-07-09 18:43:26,659 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 [2021-07-09 18:43:26,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:43:26,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:26,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:43:26,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:43:26,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773304068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:26,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:26,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-07-09 18:43:26,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124191775] [2021-07-09 18:43:26,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:43:26,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:26,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:43:26,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:43:26,888 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) [2021-07-09 18:43:29,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:29,511 INFO L93 Difference]: Finished difference Result 31957 states and 103754 transitions. [2021-07-09 18:43:29,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-07-09 18:43:29,511 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 [2021-07-09 18:43:29,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:29,590 INFO L225 Difference]: With dead ends: 31957 [2021-07-09 18:43:29,591 INFO L226 Difference]: Without dead ends: 31941 [2021-07-09 18:43:29,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7670 ImplicationChecksByTransitivity, 1851.4ms TimeCoverageRelationStatistics Valid=3631, Invalid=15551, Unknown=0, NotChecked=0, Total=19182 [2021-07-09 18:43:29,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31941 states. [2021-07-09 18:43:30,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31941 to 12804. [2021-07-09 18:43:30,092 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) [2021-07-09 18:43:30,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12804 states to 12804 states and 45566 transitions. [2021-07-09 18:43:30,124 INFO L78 Accepts]: Start accepts. Automaton has 12804 states and 45566 transitions. Word has length 36 [2021-07-09 18:43:30,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:30,124 INFO L482 AbstractCegarLoop]: Abstraction has 12804 states and 45566 transitions. [2021-07-09 18:43:30,124 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) [2021-07-09 18:43:30,124 INFO L276 IsEmpty]: Start isEmpty. Operand 12804 states and 45566 transitions. [2021-07-09 18:43:30,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:43:30,146 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:30,146 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] [2021-07-09 18:43:30,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-07-09 18:43:30,346 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:30,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:30,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1670020454, now seen corresponding path program 77 times [2021-07-09 18:43:30,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:30,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124803962] [2021-07-09 18:43:30,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:30,405 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:30,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:30,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124803962] [2021-07-09 18:43:30,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124803962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:30,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044994239] [2021-07-09 18:43:30,405 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 [2021-07-09 18:43:30,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 18:43:30,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:30,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:43:30,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:30,553 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:43:30,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044994239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:30,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:30,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-09 18:43:30,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478516663] [2021-07-09 18:43:30,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:43:30,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:30,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:43:30,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:43:30,554 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) [2021-07-09 18:43:32,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:32,705 INFO L93 Difference]: Finished difference Result 29035 states and 95366 transitions. [2021-07-09 18:43:32,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-07-09 18:43:32,705 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 [2021-07-09 18:43:32,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:32,803 INFO L225 Difference]: With dead ends: 29035 [2021-07-09 18:43:32,803 INFO L226 Difference]: Without dead ends: 28951 [2021-07-09 18:43:32,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4298 ImplicationChecksByTransitivity, 1278.9ms TimeCoverageRelationStatistics Valid=2386, Invalid=8956, Unknown=0, NotChecked=0, Total=11342 [2021-07-09 18:43:32,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28951 states. [2021-07-09 18:43:33,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28951 to 12660. [2021-07-09 18:43:33,211 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) [2021-07-09 18:43:33,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12660 states to 12660 states and 45146 transitions. [2021-07-09 18:43:33,244 INFO L78 Accepts]: Start accepts. Automaton has 12660 states and 45146 transitions. Word has length 36 [2021-07-09 18:43:33,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:33,244 INFO L482 AbstractCegarLoop]: Abstraction has 12660 states and 45146 transitions. [2021-07-09 18:43:33,244 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) [2021-07-09 18:43:33,244 INFO L276 IsEmpty]: Start isEmpty. Operand 12660 states and 45146 transitions. [2021-07-09 18:43:33,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:43:33,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:33,266 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] [2021-07-09 18:43:33,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-09 18:43:33,468 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:33,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:33,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1988479988, now seen corresponding path program 78 times [2021-07-09 18:43:33,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:33,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603387114] [2021-07-09 18:43:33,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:33,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:33,525 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:33,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:33,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603387114] [2021-07-09 18:43:33,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603387114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:33,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156816088] [2021-07-09 18:43:33,525 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 [2021-07-09 18:43:33,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:43:33,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:33,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:43:33,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:33,715 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 [2021-07-09 18:43:33,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:33,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:33,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:43:33,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-07-09 18:43:33,753 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-07-09 18:43:33,753 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 [2021-07-09 18:43:33,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:33,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:33,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:43:33,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-07-09 18:43:33,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,818 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 [2021-07-09 18:43:33,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:33,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:33,832 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. [2021-07-09 18:43:33,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-07-09 18:43:33,945 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:43:33,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156816088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:33,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:33,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-07-09 18:43:33,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144168685] [2021-07-09 18:43:33,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:43:33,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:33,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:43:33,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:43:33,946 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) [2021-07-09 18:43:37,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:37,861 INFO L93 Difference]: Finished difference Result 27292 states and 89638 transitions. [2021-07-09 18:43:37,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-07-09 18:43:37,862 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 [2021-07-09 18:43:37,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:37,944 INFO L225 Difference]: With dead ends: 27292 [2021-07-09 18:43:37,944 INFO L226 Difference]: Without dead ends: 27101 [2021-07-09 18:43:37,947 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10096 ImplicationChecksByTransitivity, 2954.2ms TimeCoverageRelationStatistics Valid=3156, Invalid=22604, Unknown=0, NotChecked=0, Total=25760 [2021-07-09 18:43:37,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27101 states. [2021-07-09 18:43:38,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27101 to 12693. [2021-07-09 18:43:38,432 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) [2021-07-09 18:43:38,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12693 states to 12693 states and 45280 transitions. [2021-07-09 18:43:38,464 INFO L78 Accepts]: Start accepts. Automaton has 12693 states and 45280 transitions. Word has length 36 [2021-07-09 18:43:38,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:38,465 INFO L482 AbstractCegarLoop]: Abstraction has 12693 states and 45280 transitions. [2021-07-09 18:43:38,465 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) [2021-07-09 18:43:38,465 INFO L276 IsEmpty]: Start isEmpty. Operand 12693 states and 45280 transitions. [2021-07-09 18:43:38,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:43:38,487 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:38,487 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] [2021-07-09 18:43:38,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-09 18:43:38,687 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:38,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:38,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1792794872, now seen corresponding path program 79 times [2021-07-09 18:43:38,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:38,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288981690] [2021-07-09 18:43:38,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:38,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:38,729 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:43:38,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:38,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288981690] [2021-07-09 18:43:38,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288981690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:38,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431543528] [2021-07-09 18:43:38,729 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 [2021-07-09 18:43:38,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:38,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:43:38,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:38,882 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:38,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431543528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:38,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:38,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-09 18:43:38,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933022135] [2021-07-09 18:43:38,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:43:38,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:38,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:43:38,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:43:38,883 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) [2021-07-09 18:43:39,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:39,693 INFO L93 Difference]: Finished difference Result 30802 states and 102946 transitions. [2021-07-09 18:43:39,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:43:39,694 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 [2021-07-09 18:43:39,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:39,776 INFO L225 Difference]: With dead ends: 30802 [2021-07-09 18:43:39,777 INFO L226 Difference]: Without dead ends: 30802 [2021-07-09 18:43:39,777 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 387.5ms TimeCoverageRelationStatistics Valid=588, Invalid=1574, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:43:39,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30802 states. [2021-07-09 18:43:40,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30802 to 12697. [2021-07-09 18:43:40,217 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) [2021-07-09 18:43:40,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12697 states to 12697 states and 45302 transitions. [2021-07-09 18:43:40,250 INFO L78 Accepts]: Start accepts. Automaton has 12697 states and 45302 transitions. Word has length 36 [2021-07-09 18:43:40,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:40,250 INFO L482 AbstractCegarLoop]: Abstraction has 12697 states and 45302 transitions. [2021-07-09 18:43:40,250 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) [2021-07-09 18:43:40,250 INFO L276 IsEmpty]: Start isEmpty. Operand 12697 states and 45302 transitions. [2021-07-09 18:43:40,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:43:40,271 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:40,271 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] [2021-07-09 18:43:40,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-07-09 18:43:40,471 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:40,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:40,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1230140076, now seen corresponding path program 80 times [2021-07-09 18:43:40,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:40,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914661587] [2021-07-09 18:43:40,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:40,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:40,529 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:40,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:40,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914661587] [2021-07-09 18:43:40,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914661587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:40,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077778190] [2021-07-09 18:43:40,530 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 [2021-07-09 18:43:40,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:43:40,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:40,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:43:40,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:40,802 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:43:40,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077778190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:40,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:40,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:43:40,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309763709] [2021-07-09 18:43:40,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:43:40,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:40,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:43:40,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:43:40,803 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) [2021-07-09 18:43:44,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:44,181 INFO L93 Difference]: Finished difference Result 33049 states and 107981 transitions. [2021-07-09 18:43:44,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2021-07-09 18:43:44,181 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 [2021-07-09 18:43:44,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:44,273 INFO L225 Difference]: With dead ends: 33049 [2021-07-09 18:43:44,273 INFO L226 Difference]: Without dead ends: 32977 [2021-07-09 18:43:44,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11512 ImplicationChecksByTransitivity, 2191.9ms TimeCoverageRelationStatistics Valid=4716, Invalid=23006, Unknown=0, NotChecked=0, Total=27722 [2021-07-09 18:43:44,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32977 states. [2021-07-09 18:43:44,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32977 to 12738. [2021-07-09 18:43:44,751 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) [2021-07-09 18:43:44,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12738 states to 12738 states and 45506 transitions. [2021-07-09 18:43:44,784 INFO L78 Accepts]: Start accepts. Automaton has 12738 states and 45506 transitions. Word has length 36 [2021-07-09 18:43:44,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:44,784 INFO L482 AbstractCegarLoop]: Abstraction has 12738 states and 45506 transitions. [2021-07-09 18:43:44,784 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) [2021-07-09 18:43:44,784 INFO L276 IsEmpty]: Start isEmpty. Operand 12738 states and 45506 transitions. [2021-07-09 18:43:44,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:43:44,806 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:44,806 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] [2021-07-09 18:43:45,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-07-09 18:43:45,006 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:45,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:45,007 INFO L82 PathProgramCache]: Analyzing trace with hash -2017838672, now seen corresponding path program 81 times [2021-07-09 18:43:45,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:45,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082355169] [2021-07-09 18:43:45,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:45,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:45,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:45,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082355169] [2021-07-09 18:43:45,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082355169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:45,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75730121] [2021-07-09 18:43:45,062 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 [2021-07-09 18:43:45,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 18:43:45,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:45,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:43:45,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:45,188 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:45,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75730121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:45,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:45,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-07-09 18:43:45,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953967658] [2021-07-09 18:43:45,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:43:45,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:45,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:43:45,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:43:45,189 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) [2021-07-09 18:43:46,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:46,661 INFO L93 Difference]: Finished difference Result 28529 states and 93962 transitions. [2021-07-09 18:43:46,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-09 18:43:46,661 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 [2021-07-09 18:43:46,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:46,732 INFO L225 Difference]: With dead ends: 28529 [2021-07-09 18:43:46,732 INFO L226 Difference]: Without dead ends: 28385 [2021-07-09 18:43:46,733 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2641 ImplicationChecksByTransitivity, 849.1ms TimeCoverageRelationStatistics Valid=1478, Invalid=6004, Unknown=0, NotChecked=0, Total=7482 [2021-07-09 18:43:46,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28385 states. [2021-07-09 18:43:47,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28385 to 12796. [2021-07-09 18:43:47,209 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) [2021-07-09 18:43:47,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12796 states to 12796 states and 45675 transitions. [2021-07-09 18:43:47,243 INFO L78 Accepts]: Start accepts. Automaton has 12796 states and 45675 transitions. Word has length 36 [2021-07-09 18:43:47,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:47,243 INFO L482 AbstractCegarLoop]: Abstraction has 12796 states and 45675 transitions. [2021-07-09 18:43:47,243 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) [2021-07-09 18:43:47,243 INFO L276 IsEmpty]: Start isEmpty. Operand 12796 states and 45675 transitions. [2021-07-09 18:43:47,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:43:47,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:47,266 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] [2021-07-09 18:43:47,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-07-09 18:43:47,467 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:47,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:47,467 INFO L82 PathProgramCache]: Analyzing trace with hash -545537740, now seen corresponding path program 82 times [2021-07-09 18:43:47,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:47,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673922428] [2021-07-09 18:43:47,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:47,524 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:47,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:47,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673922428] [2021-07-09 18:43:47,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673922428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:47,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902817891] [2021-07-09 18:43:47,524 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 [2021-07-09 18:43:47,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:43:47,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:47,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:43:47,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:47,663 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:43:47,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902817891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:47,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:47,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-07-09 18:43:47,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378352563] [2021-07-09 18:43:47,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:43:47,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:47,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:43:47,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:43:47,664 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) [2021-07-09 18:43:49,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:49,677 INFO L93 Difference]: Finished difference Result 30495 states and 99403 transitions. [2021-07-09 18:43:49,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-07-09 18:43:49,677 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 [2021-07-09 18:43:49,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:49,769 INFO L225 Difference]: With dead ends: 30495 [2021-07-09 18:43:49,769 INFO L226 Difference]: Without dead ends: 30483 [2021-07-09 18:43:49,771 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5685 ImplicationChecksByTransitivity, 1273.6ms TimeCoverageRelationStatistics Valid=2727, Invalid=11315, Unknown=0, NotChecked=0, Total=14042 [2021-07-09 18:43:49,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30483 states. [2021-07-09 18:43:50,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30483 to 11108. [2021-07-09 18:43:50,267 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) [2021-07-09 18:43:50,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11108 states to 11108 states and 38506 transitions. [2021-07-09 18:43:50,294 INFO L78 Accepts]: Start accepts. Automaton has 11108 states and 38506 transitions. Word has length 36 [2021-07-09 18:43:50,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:50,294 INFO L482 AbstractCegarLoop]: Abstraction has 11108 states and 38506 transitions. [2021-07-09 18:43:50,294 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) [2021-07-09 18:43:50,294 INFO L276 IsEmpty]: Start isEmpty. Operand 11108 states and 38506 transitions. [2021-07-09 18:43:50,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:43:50,311 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:50,311 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] [2021-07-09 18:43:50,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:50,511 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:50,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:50,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1920078252, now seen corresponding path program 83 times [2021-07-09 18:43:50,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:50,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159509840] [2021-07-09 18:43:50,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:50,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:50,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:50,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159509840] [2021-07-09 18:43:50,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159509840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:50,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737409634] [2021-07-09 18:43:50,570 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 [2021-07-09 18:43:50,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:43:50,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:50,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:43:50,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:43:50,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737409634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:50,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:50,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-07-09 18:43:50,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188829852] [2021-07-09 18:43:50,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:43:50,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:50,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:43:50,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:43:50,739 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) [2021-07-09 18:43:52,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:52,603 INFO L93 Difference]: Finished difference Result 23782 states and 78083 transitions. [2021-07-09 18:43:52,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-07-09 18:43:52,604 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 [2021-07-09 18:43:52,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:52,659 INFO L225 Difference]: With dead ends: 23782 [2021-07-09 18:43:52,659 INFO L226 Difference]: Without dead ends: 23782 [2021-07-09 18:43:52,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4543 ImplicationChecksByTransitivity, 1255.1ms TimeCoverageRelationStatistics Valid=2343, Invalid=8999, Unknown=0, NotChecked=0, Total=11342 [2021-07-09 18:43:52,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23782 states. [2021-07-09 18:43:53,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23782 to 11414. [2021-07-09 18:43:53,058 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) [2021-07-09 18:43:53,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11414 states to 11414 states and 39415 transitions. [2021-07-09 18:43:53,084 INFO L78 Accepts]: Start accepts. Automaton has 11414 states and 39415 transitions. Word has length 36 [2021-07-09 18:43:53,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:53,085 INFO L482 AbstractCegarLoop]: Abstraction has 11414 states and 39415 transitions. [2021-07-09 18:43:53,085 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) [2021-07-09 18:43:53,085 INFO L276 IsEmpty]: Start isEmpty. Operand 11414 states and 39415 transitions. [2021-07-09 18:43:53,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:43:53,102 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:53,102 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] [2021-07-09 18:43:53,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:53,302 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:53,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:53,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1278156332, now seen corresponding path program 84 times [2021-07-09 18:43:53,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:53,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041294047] [2021-07-09 18:43:53,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:53,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:53,365 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:53,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:53,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041294047] [2021-07-09 18:43:53,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041294047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:53,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636840017] [2021-07-09 18:43:53,365 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 [2021-07-09 18:43:53,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 18:43:53,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:53,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:43:53,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:53,594 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 [2021-07-09 18:43:53,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:53,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:53,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:43:53,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-07-09 18:43:53,638 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-07-09 18:43:53,638 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 24 treesize of output 26 [2021-07-09 18:43:53,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:53,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:53,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:43:53,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-07-09 18:43:53,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:53,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:53,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:53,713 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 [2021-07-09 18:43:53,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:53,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:53,728 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. [2021-07-09 18:43:53,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-07-09 18:43:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:43:53,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636840017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:53,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:53,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-07-09 18:43:53,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333662367] [2021-07-09 18:43:53,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:43:53,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:53,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:43:53,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:43:53,856 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) [2021-07-09 18:43:58,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:58,750 INFO L93 Difference]: Finished difference Result 23675 states and 76434 transitions. [2021-07-09 18:43:58,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-07-09 18:43:58,750 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 [2021-07-09 18:43:58,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:58,800 INFO L225 Difference]: With dead ends: 23675 [2021-07-09 18:43:58,800 INFO L226 Difference]: Without dead ends: 23445 [2021-07-09 18:43:58,802 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12718 ImplicationChecksByTransitivity, 3541.2ms TimeCoverageRelationStatistics Valid=3502, Invalid=29078, Unknown=0, NotChecked=0, Total=32580 [2021-07-09 18:43:58,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23445 states. [2021-07-09 18:43:59,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23445 to 11648. [2021-07-09 18:43:59,121 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) [2021-07-09 18:43:59,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11648 states to 11648 states and 40226 transitions. [2021-07-09 18:43:59,256 INFO L78 Accepts]: Start accepts. Automaton has 11648 states and 40226 transitions. Word has length 36 [2021-07-09 18:43:59,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:59,256 INFO L482 AbstractCegarLoop]: Abstraction has 11648 states and 40226 transitions. [2021-07-09 18:43:59,257 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) [2021-07-09 18:43:59,257 INFO L276 IsEmpty]: Start isEmpty. Operand 11648 states and 40226 transitions. [2021-07-09 18:43:59,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:43:59,279 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:59,279 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] [2021-07-09 18:43:59,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:59,481 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:59,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:59,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1851612882, now seen corresponding path program 85 times [2021-07-09 18:43:59,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:59,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691685746] [2021-07-09 18:43:59,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:59,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:59,532 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:43:59,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:59,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691685746] [2021-07-09 18:43:59,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691685746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:59,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911108484] [2021-07-09 18:43:59,533 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 [2021-07-09 18:43:59,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:59,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:43:59,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:59,684 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:43:59,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911108484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:59,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:59,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:43:59,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173682630] [2021-07-09 18:43:59,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:43:59,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:59,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:43:59,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:43:59,685 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) [2021-07-09 18:44:01,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:01,003 INFO L93 Difference]: Finished difference Result 21100 states and 70299 transitions. [2021-07-09 18:44:01,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-07-09 18:44:01,003 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 [2021-07-09 18:44:01,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:01,055 INFO L225 Difference]: With dead ends: 21100 [2021-07-09 18:44:01,055 INFO L226 Difference]: Without dead ends: 21088 [2021-07-09 18:44:01,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2074 ImplicationChecksByTransitivity, 754.0ms TimeCoverageRelationStatistics Valid=1148, Invalid=4858, Unknown=0, NotChecked=0, Total=6006 [2021-07-09 18:44:01,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21088 states. [2021-07-09 18:44:01,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21088 to 11913. [2021-07-09 18:44:01,377 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) [2021-07-09 18:44:01,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11913 states to 11913 states and 41154 transitions. [2021-07-09 18:44:01,405 INFO L78 Accepts]: Start accepts. Automaton has 11913 states and 41154 transitions. Word has length 36 [2021-07-09 18:44:01,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:01,405 INFO L482 AbstractCegarLoop]: Abstraction has 11913 states and 41154 transitions. [2021-07-09 18:44:01,405 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) [2021-07-09 18:44:01,405 INFO L276 IsEmpty]: Start isEmpty. Operand 11913 states and 41154 transitions. [2021-07-09 18:44:01,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:44:01,423 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:01,423 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] [2021-07-09 18:44:01,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:01,623 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:01,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:01,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1819802944, now seen corresponding path program 25 times [2021-07-09 18:44:01,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:01,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220759826] [2021-07-09 18:44:01,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:01,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:01,666 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:44:01,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:01,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220759826] [2021-07-09 18:44:01,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220759826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:01,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073999968] [2021-07-09 18:44:01,666 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 [2021-07-09 18:44:01,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:01,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:44:01,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:01,879 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:01,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073999968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:01,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:01,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-07-09 18:44:01,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131165043] [2021-07-09 18:44:01,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:44:01,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:01,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:44:01,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:44:01,880 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) [2021-07-09 18:44:03,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:03,003 INFO L93 Difference]: Finished difference Result 29397 states and 97752 transitions. [2021-07-09 18:44:03,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:44:03,003 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 [2021-07-09 18:44:03,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:03,074 INFO L225 Difference]: With dead ends: 29397 [2021-07-09 18:44:03,074 INFO L226 Difference]: Without dead ends: 29397 [2021-07-09 18:44:03,075 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 657.1ms TimeCoverageRelationStatistics Valid=957, Invalid=2583, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:44:03,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29397 states. [2021-07-09 18:44:03,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29397 to 12618. [2021-07-09 18:44:03,533 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) [2021-07-09 18:44:03,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12618 states to 12618 states and 44332 transitions. [2021-07-09 18:44:03,567 INFO L78 Accepts]: Start accepts. Automaton has 12618 states and 44332 transitions. Word has length 36 [2021-07-09 18:44:03,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:03,567 INFO L482 AbstractCegarLoop]: Abstraction has 12618 states and 44332 transitions. [2021-07-09 18:44:03,567 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) [2021-07-09 18:44:03,567 INFO L276 IsEmpty]: Start isEmpty. Operand 12618 states and 44332 transitions. [2021-07-09 18:44:03,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:44:03,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:03,588 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] [2021-07-09 18:44:03,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-07-09 18:44:03,788 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:03,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:03,789 INFO L82 PathProgramCache]: Analyzing trace with hash 512328654, now seen corresponding path program 26 times [2021-07-09 18:44:03,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:03,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334136785] [2021-07-09 18:44:03,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:03,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:03,831 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:44:03,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:03,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334136785] [2021-07-09 18:44:03,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334136785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:03,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506122692] [2021-07-09 18:44:03,831 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 [2021-07-09 18:44:03,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:44:03,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:03,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:44:03,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:03,990 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:03,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506122692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:03,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:03,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 18 [2021-07-09 18:44:03,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176954362] [2021-07-09 18:44:03,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:44:03,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:03,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:44:03,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:44:03,991 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) [2021-07-09 18:44:05,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:05,051 INFO L93 Difference]: Finished difference Result 27598 states and 91849 transitions. [2021-07-09 18:44:05,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:44:05,051 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 [2021-07-09 18:44:05,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:05,122 INFO L225 Difference]: With dead ends: 27598 [2021-07-09 18:44:05,122 INFO L226 Difference]: Without dead ends: 27598 [2021-07-09 18:44:05,123 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 574.1ms TimeCoverageRelationStatistics Valid=833, Invalid=2359, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:44:05,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27598 states. [2021-07-09 18:44:05,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27598 to 12630. [2021-07-09 18:44:05,629 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) [2021-07-09 18:44:05,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12630 states to 12630 states and 44374 transitions. [2021-07-09 18:44:05,661 INFO L78 Accepts]: Start accepts. Automaton has 12630 states and 44374 transitions. Word has length 36 [2021-07-09 18:44:05,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:05,661 INFO L482 AbstractCegarLoop]: Abstraction has 12630 states and 44374 transitions. [2021-07-09 18:44:05,662 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) [2021-07-09 18:44:05,662 INFO L276 IsEmpty]: Start isEmpty. Operand 12630 states and 44374 transitions. [2021-07-09 18:44:05,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:44:05,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:05,680 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] [2021-07-09 18:44:05,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-09 18:44:05,881 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:05,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:05,881 INFO L82 PathProgramCache]: Analyzing trace with hash -2051604804, now seen corresponding path program 27 times [2021-07-09 18:44:05,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:05,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978485814] [2021-07-09 18:44:05,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:05,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:05,922 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:44:05,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:05,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978485814] [2021-07-09 18:44:05,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978485814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:05,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542060540] [2021-07-09 18:44:05,923 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 [2021-07-09 18:44:05,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 18:44:05,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:05,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:44:05,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:06,075 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:06,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542060540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:06,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:06,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 18 [2021-07-09 18:44:06,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053582388] [2021-07-09 18:44:06,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:44:06,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:06,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:44:06,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:44:06,076 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) [2021-07-09 18:44:07,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:07,071 INFO L93 Difference]: Finished difference Result 27112 states and 90425 transitions. [2021-07-09 18:44:07,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:44:07,072 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 [2021-07-09 18:44:07,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:07,143 INFO L225 Difference]: With dead ends: 27112 [2021-07-09 18:44:07,143 INFO L226 Difference]: Without dead ends: 27108 [2021-07-09 18:44:07,144 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 506.3ms TimeCoverageRelationStatistics Valid=708, Invalid=2048, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:44:07,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27108 states. [2021-07-09 18:44:07,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27108 to 12826. [2021-07-09 18:44:07,536 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) [2021-07-09 18:44:07,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12826 states to 12826 states and 44940 transitions. [2021-07-09 18:44:07,570 INFO L78 Accepts]: Start accepts. Automaton has 12826 states and 44940 transitions. Word has length 36 [2021-07-09 18:44:07,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:07,570 INFO L482 AbstractCegarLoop]: Abstraction has 12826 states and 44940 transitions. [2021-07-09 18:44:07,570 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) [2021-07-09 18:44:07,570 INFO L276 IsEmpty]: Start isEmpty. Operand 12826 states and 44940 transitions. [2021-07-09 18:44:07,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:44:07,592 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:07,592 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] [2021-07-09 18:44:07,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-09 18:44:07,793 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:07,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:07,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1246962008, now seen corresponding path program 28 times [2021-07-09 18:44:07,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:07,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128778500] [2021-07-09 18:44:07,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:07,841 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:44:07,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:07,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128778500] [2021-07-09 18:44:07,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128778500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:07,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429239790] [2021-07-09 18:44:07,842 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 [2021-07-09 18:44:07,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:44:07,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:07,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:44:07,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:08,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429239790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:08,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:08,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 18 [2021-07-09 18:44:08,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123113271] [2021-07-09 18:44:08,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:44:08,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:08,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:44:08,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:44:08,082 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) [2021-07-09 18:44:09,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:09,158 INFO L93 Difference]: Finished difference Result 26778 states and 89284 transitions. [2021-07-09 18:44:09,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:44:09,158 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 [2021-07-09 18:44:09,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:09,226 INFO L225 Difference]: With dead ends: 26778 [2021-07-09 18:44:09,226 INFO L226 Difference]: Without dead ends: 26778 [2021-07-09 18:44:09,227 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 606.4ms TimeCoverageRelationStatistics Valid=956, Invalid=2704, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:44:09,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26778 states. [2021-07-09 18:44:09,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26778 to 12913. [2021-07-09 18:44:09,614 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) [2021-07-09 18:44:09,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12913 states to 12913 states and 45404 transitions. [2021-07-09 18:44:09,649 INFO L78 Accepts]: Start accepts. Automaton has 12913 states and 45404 transitions. Word has length 36 [2021-07-09 18:44:09,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:09,649 INFO L482 AbstractCegarLoop]: Abstraction has 12913 states and 45404 transitions. [2021-07-09 18:44:09,649 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) [2021-07-09 18:44:09,649 INFO L276 IsEmpty]: Start isEmpty. Operand 12913 states and 45404 transitions. [2021-07-09 18:44:09,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:44:09,672 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:09,672 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] [2021-07-09 18:44:09,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-09 18:44:09,872 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:09,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:09,872 INFO L82 PathProgramCache]: Analyzing trace with hash 680135048, now seen corresponding path program 29 times [2021-07-09 18:44:09,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:09,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868484964] [2021-07-09 18:44:09,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:09,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:44:09,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:09,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868484964] [2021-07-09 18:44:09,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868484964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:09,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202883133] [2021-07-09 18:44:09,925 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 [2021-07-09 18:44:09,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:44:09,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:09,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:44:09,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:44:10,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202883133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:10,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:10,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 18:44:10,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221507409] [2021-07-09 18:44:10,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:44:10,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:10,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:44:10,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:44:10,192 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) [2021-07-09 18:44:14,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:14,657 INFO L93 Difference]: Finished difference Result 28407 states and 94171 transitions. [2021-07-09 18:44:14,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2021-07-09 18:44:14,657 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 [2021-07-09 18:44:14,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:14,726 INFO L225 Difference]: With dead ends: 28407 [2021-07-09 18:44:14,726 INFO L226 Difference]: Without dead ends: 28387 [2021-07-09 18:44:14,728 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18300 ImplicationChecksByTransitivity, 3479.4ms TimeCoverageRelationStatistics Valid=7298, Invalid=36174, Unknown=0, NotChecked=0, Total=43472 [2021-07-09 18:44:14,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28387 states. [2021-07-09 18:44:15,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28387 to 13021. [2021-07-09 18:44:15,111 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) [2021-07-09 18:44:15,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13021 states to 13021 states and 45919 transitions. [2021-07-09 18:44:15,144 INFO L78 Accepts]: Start accepts. Automaton has 13021 states and 45919 transitions. Word has length 36 [2021-07-09 18:44:15,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:15,144 INFO L482 AbstractCegarLoop]: Abstraction has 13021 states and 45919 transitions. [2021-07-09 18:44:15,144 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) [2021-07-09 18:44:15,144 INFO L276 IsEmpty]: Start isEmpty. Operand 13021 states and 45919 transitions. [2021-07-09 18:44:15,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:44:15,166 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:15,166 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] [2021-07-09 18:44:15,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:15,366 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:15,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:15,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1847708024, now seen corresponding path program 30 times [2021-07-09 18:44:15,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:15,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369470372] [2021-07-09 18:44:15,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:15,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:15,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:15,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369470372] [2021-07-09 18:44:15,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369470372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:15,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455252827] [2021-07-09 18:44:15,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:44:15,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 18:44:15,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:15,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:44:15,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:15,601 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 [2021-07-09 18:44:15,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:15,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:15,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:15,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-07-09 18:44:15,639 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-07-09 18:44:15,639 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 [2021-07-09 18:44:15,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:15,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:15,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:15,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-07-09 18:44:15,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:15,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:15,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:15,700 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 [2021-07-09 18:44:15,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:15,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:15,713 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. [2021-07-09 18:44:15,713 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-07-09 18:44:15,801 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:44:15,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455252827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:15,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:15,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-07-09 18:44:15,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804482085] [2021-07-09 18:44:15,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:44:15,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:15,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:44:15,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:44:15,802 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) [2021-07-09 18:44:20,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:20,295 INFO L93 Difference]: Finished difference Result 25162 states and 83066 transitions. [2021-07-09 18:44:20,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-07-09 18:44:20,295 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 [2021-07-09 18:44:20,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:20,362 INFO L225 Difference]: With dead ends: 25162 [2021-07-09 18:44:20,362 INFO L226 Difference]: Without dead ends: 24983 [2021-07-09 18:44:20,366 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13764 ImplicationChecksByTransitivity, 3302.2ms TimeCoverageRelationStatistics Valid=4792, Invalid=29248, Unknown=0, NotChecked=0, Total=34040 [2021-07-09 18:44:20,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24983 states. [2021-07-09 18:44:20,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24983 to 13428. [2021-07-09 18:44:20,800 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) [2021-07-09 18:44:20,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13428 states to 13428 states and 47054 transitions. [2021-07-09 18:44:20,837 INFO L78 Accepts]: Start accepts. Automaton has 13428 states and 47054 transitions. Word has length 36 [2021-07-09 18:44:20,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:20,837 INFO L482 AbstractCegarLoop]: Abstraction has 13428 states and 47054 transitions. [2021-07-09 18:44:20,837 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) [2021-07-09 18:44:20,837 INFO L276 IsEmpty]: Start isEmpty. Operand 13428 states and 47054 transitions. [2021-07-09 18:44:20,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:44:20,862 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:20,862 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] [2021-07-09 18:44:21,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-07-09 18:44:21,062 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:21,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:21,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1284231232, now seen corresponding path program 86 times [2021-07-09 18:44:21,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:21,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652598492] [2021-07-09 18:44:21,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:21,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:21,117 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:44:21,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:21,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652598492] [2021-07-09 18:44:21,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652598492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:21,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462744819] [2021-07-09 18:44:21,117 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 [2021-07-09 18:44:21,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:44:21,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:21,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:44:21,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:21,269 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:44:21,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462744819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:21,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:21,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 18:44:21,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047560045] [2021-07-09 18:44:21,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:44:21,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:21,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:44:21,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:44:21,270 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) [2021-07-09 18:44:22,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:22,092 INFO L93 Difference]: Finished difference Result 24409 states and 81988 transitions. [2021-07-09 18:44:22,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:44:22,092 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 [2021-07-09 18:44:22,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:22,150 INFO L225 Difference]: With dead ends: 24409 [2021-07-09 18:44:22,150 INFO L226 Difference]: Without dead ends: 24409 [2021-07-09 18:44:22,151 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 426.9ms TimeCoverageRelationStatistics Valid=614, Invalid=1836, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:44:22,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24409 states. [2021-07-09 18:44:22,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24409 to 13273. [2021-07-09 18:44:22,514 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) [2021-07-09 18:44:22,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13273 states to 13273 states and 46392 transitions. [2021-07-09 18:44:22,549 INFO L78 Accepts]: Start accepts. Automaton has 13273 states and 46392 transitions. Word has length 36 [2021-07-09 18:44:22,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:22,549 INFO L482 AbstractCegarLoop]: Abstraction has 13273 states and 46392 transitions. [2021-07-09 18:44:22,549 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) [2021-07-09 18:44:22,549 INFO L276 IsEmpty]: Start isEmpty. Operand 13273 states and 46392 transitions. [2021-07-09 18:44:22,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:44:22,572 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:22,572 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] [2021-07-09 18:44:22,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:22,773 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:22,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:22,774 INFO L82 PathProgramCache]: Analyzing trace with hash -2050547776, now seen corresponding path program 87 times [2021-07-09 18:44:22,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:22,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613532446] [2021-07-09 18:44:22,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:22,821 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:44:22,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:22,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613532446] [2021-07-09 18:44:22,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613532446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:22,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472666908] [2021-07-09 18:44:22,821 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 [2021-07-09 18:44:22,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:44:22,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:22,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:44:22,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:44:22,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472666908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:22,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:22,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 18:44:22,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815369214] [2021-07-09 18:44:22,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:44:22,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:22,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:44:22,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:44:22,960 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) [2021-07-09 18:44:23,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:23,478 INFO L93 Difference]: Finished difference Result 23775 states and 80054 transitions. [2021-07-09 18:44:23,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:44:23,478 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 [2021-07-09 18:44:23,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:23,532 INFO L225 Difference]: With dead ends: 23775 [2021-07-09 18:44:23,532 INFO L226 Difference]: Without dead ends: 23775 [2021-07-09 18:44:23,533 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 246.9ms TimeCoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:44:23,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23775 states. [2021-07-09 18:44:23,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23775 to 13214. [2021-07-09 18:44:23,927 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) [2021-07-09 18:44:23,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13214 states to 13214 states and 46142 transitions. [2021-07-09 18:44:23,960 INFO L78 Accepts]: Start accepts. Automaton has 13214 states and 46142 transitions. Word has length 36 [2021-07-09 18:44:23,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:23,960 INFO L482 AbstractCegarLoop]: Abstraction has 13214 states and 46142 transitions. [2021-07-09 18:44:23,960 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) [2021-07-09 18:44:23,960 INFO L276 IsEmpty]: Start isEmpty. Operand 13214 states and 46142 transitions. [2021-07-09 18:44:23,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:44:23,982 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:23,982 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] [2021-07-09 18:44:24,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-07-09 18:44:24,182 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:24,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:24,183 INFO L82 PathProgramCache]: Analyzing trace with hash 281583822, now seen corresponding path program 88 times [2021-07-09 18:44:24,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:24,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277415932] [2021-07-09 18:44:24,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:24,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:24,230 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:44:24,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:24,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277415932] [2021-07-09 18:44:24,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277415932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:24,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791792688] [2021-07-09 18:44:24,230 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 [2021-07-09 18:44:24,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:44:24,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:24,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:44:24,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:24,356 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:44:24,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791792688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:24,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:24,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-07-09 18:44:24,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221101744] [2021-07-09 18:44:24,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:44:24,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:24,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:44:24,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:44:24,357 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) [2021-07-09 18:44:24,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:24,878 INFO L93 Difference]: Finished difference Result 23327 states and 78114 transitions. [2021-07-09 18:44:24,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:44:24,879 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 [2021-07-09 18:44:24,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:24,928 INFO L225 Difference]: With dead ends: 23327 [2021-07-09 18:44:24,928 INFO L226 Difference]: Without dead ends: 23327 [2021-07-09 18:44:24,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 252.3ms TimeCoverageRelationStatistics Valid=312, Invalid=878, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:44:24,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23327 states. [2021-07-09 18:44:25,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23327 to 13240. [2021-07-09 18:44:25,279 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) [2021-07-09 18:44:25,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13240 states to 13240 states and 46221 transitions. [2021-07-09 18:44:25,312 INFO L78 Accepts]: Start accepts. Automaton has 13240 states and 46221 transitions. Word has length 36 [2021-07-09 18:44:25,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:25,313 INFO L482 AbstractCegarLoop]: Abstraction has 13240 states and 46221 transitions. [2021-07-09 18:44:25,313 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) [2021-07-09 18:44:25,313 INFO L276 IsEmpty]: Start isEmpty. Operand 13240 states and 46221 transitions. [2021-07-09 18:44:25,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:44:25,335 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:25,335 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] [2021-07-09 18:44:25,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-07-09 18:44:25,535 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:25,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:25,536 INFO L82 PathProgramCache]: Analyzing trace with hash 2012617660, now seen corresponding path program 89 times [2021-07-09 18:44:25,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:25,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991156204] [2021-07-09 18:44:25,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:25,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:25,583 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:44:25,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:25,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991156204] [2021-07-09 18:44:25,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991156204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:25,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338696846] [2021-07-09 18:44:25,584 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 [2021-07-09 18:44:25,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:44:25,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:25,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:44:25,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:25,719 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:44:25,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338696846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:25,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:25,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 18:44:25,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405658814] [2021-07-09 18:44:25,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:44:25,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:25,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:44:25,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:44:25,720 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) [2021-07-09 18:44:27,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:27,279 INFO L93 Difference]: Finished difference Result 26376 states and 86731 transitions. [2021-07-09 18:44:27,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-07-09 18:44:27,279 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 [2021-07-09 18:44:27,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:27,342 INFO L225 Difference]: With dead ends: 26376 [2021-07-09 18:44:27,342 INFO L226 Difference]: Without dead ends: 26364 [2021-07-09 18:44:27,343 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2864 ImplicationChecksByTransitivity, 977.0ms TimeCoverageRelationStatistics Valid=1623, Invalid=6387, Unknown=0, NotChecked=0, Total=8010 [2021-07-09 18:44:27,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26364 states. [2021-07-09 18:44:27,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26364 to 13310. [2021-07-09 18:44:27,699 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) [2021-07-09 18:44:27,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13310 states to 13310 states and 46284 transitions. [2021-07-09 18:44:27,733 INFO L78 Accepts]: Start accepts. Automaton has 13310 states and 46284 transitions. Word has length 36 [2021-07-09 18:44:27,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:27,733 INFO L482 AbstractCegarLoop]: Abstraction has 13310 states and 46284 transitions. [2021-07-09 18:44:27,733 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) [2021-07-09 18:44:27,733 INFO L276 IsEmpty]: Start isEmpty. Operand 13310 states and 46284 transitions. [2021-07-09 18:44:27,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:44:27,755 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:27,755 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] [2021-07-09 18:44:27,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:27,956 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:27,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:27,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1239534524, now seen corresponding path program 90 times [2021-07-09 18:44:27,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:27,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114153769] [2021-07-09 18:44:27,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:27,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:28,004 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:44:28,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:28,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114153769] [2021-07-09 18:44:28,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114153769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:28,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179456722] [2021-07-09 18:44:28,004 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 [2021-07-09 18:44:28,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:44:28,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:28,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:44:28,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:28,109 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 18:44:28,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179456722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:28,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:28,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-07-09 18:44:28,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107209737] [2021-07-09 18:44:28,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:44:28,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:28,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:44:28,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:44:28,110 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) [2021-07-09 18:44:29,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:29,000 INFO L93 Difference]: Finished difference Result 26781 states and 88963 transitions. [2021-07-09 18:44:29,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:44:29,001 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 [2021-07-09 18:44:29,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:29,066 INFO L225 Difference]: With dead ends: 26781 [2021-07-09 18:44:29,066 INFO L226 Difference]: Without dead ends: 26737 [2021-07-09 18:44:29,067 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 514.2ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:44:29,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26737 states. [2021-07-09 18:44:29,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26737 to 13708. [2021-07-09 18:44:29,432 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) [2021-07-09 18:44:29,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13708 states to 13708 states and 47303 transitions. [2021-07-09 18:44:29,465 INFO L78 Accepts]: Start accepts. Automaton has 13708 states and 47303 transitions. Word has length 36 [2021-07-09 18:44:29,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:29,465 INFO L482 AbstractCegarLoop]: Abstraction has 13708 states and 47303 transitions. [2021-07-09 18:44:29,465 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) [2021-07-09 18:44:29,466 INFO L276 IsEmpty]: Start isEmpty. Operand 13708 states and 47303 transitions. [2021-07-09 18:44:29,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:44:29,488 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:29,488 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] [2021-07-09 18:44:29,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:29,688 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:29,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:29,689 INFO L82 PathProgramCache]: Analyzing trace with hash 790366380, now seen corresponding path program 91 times [2021-07-09 18:44:29,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:29,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245294307] [2021-07-09 18:44:29,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:29,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:29,855 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:44:29,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:29,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245294307] [2021-07-09 18:44:29,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245294307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:29,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766875852] [2021-07-09 18:44:29,855 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 [2021-07-09 18:44:29,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:29,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:44:29,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:44:29,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766875852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:29,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:29,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-07-09 18:44:29,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850921985] [2021-07-09 18:44:29,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:44:29,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:29,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:44:29,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:44:29,994 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) [2021-07-09 18:44:30,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:30,727 INFO L93 Difference]: Finished difference Result 26715 states and 87686 transitions. [2021-07-09 18:44:30,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:44:30,728 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 [2021-07-09 18:44:30,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:30,793 INFO L225 Difference]: With dead ends: 26715 [2021-07-09 18:44:30,793 INFO L226 Difference]: Without dead ends: 26715 [2021-07-09 18:44:30,793 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 512.7ms TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:44:30,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26715 states. [2021-07-09 18:44:31,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26715 to 14801. [2021-07-09 18:44:31,193 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) [2021-07-09 18:44:31,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14801 states to 14801 states and 51098 transitions. [2021-07-09 18:44:31,230 INFO L78 Accepts]: Start accepts. Automaton has 14801 states and 51098 transitions. Word has length 36 [2021-07-09 18:44:31,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:31,230 INFO L482 AbstractCegarLoop]: Abstraction has 14801 states and 51098 transitions. [2021-07-09 18:44:31,230 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) [2021-07-09 18:44:31,230 INFO L276 IsEmpty]: Start isEmpty. Operand 14801 states and 51098 transitions. [2021-07-09 18:44:31,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:44:31,261 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:31,261 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] [2021-07-09 18:44:31,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-09 18:44:31,484 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:31,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:31,485 INFO L82 PathProgramCache]: Analyzing trace with hash -2078452856, now seen corresponding path program 92 times [2021-07-09 18:44:31,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:31,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121168855] [2021-07-09 18:44:31,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:31,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:31,540 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:44:31,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:31,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121168855] [2021-07-09 18:44:31,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121168855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:31,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711634443] [2021-07-09 18:44:31,540 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 [2021-07-09 18:44:31,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:44:31,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:31,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:44:31,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:44:31,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711634443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:31,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:31,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-07-09 18:44:31,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889849236] [2021-07-09 18:44:31,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:44:31,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:31,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:44:31,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:44:31,647 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) [2021-07-09 18:44:32,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:32,667 INFO L93 Difference]: Finished difference Result 26862 states and 89241 transitions. [2021-07-09 18:44:32,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:44:32,668 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 [2021-07-09 18:44:32,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:32,740 INFO L225 Difference]: With dead ends: 26862 [2021-07-09 18:44:32,740 INFO L226 Difference]: Without dead ends: 26794 [2021-07-09 18:44:32,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1546 ImplicationChecksByTransitivity, 587.3ms TimeCoverageRelationStatistics Valid=916, Invalid=3640, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:44:32,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26794 states. [2021-07-09 18:44:33,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26794 to 14135. [2021-07-09 18:44:33,184 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) [2021-07-09 18:44:33,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14135 states to 14135 states and 49129 transitions. [2021-07-09 18:44:33,219 INFO L78 Accepts]: Start accepts. Automaton has 14135 states and 49129 transitions. Word has length 36 [2021-07-09 18:44:33,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:33,219 INFO L482 AbstractCegarLoop]: Abstraction has 14135 states and 49129 transitions. [2021-07-09 18:44:33,219 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) [2021-07-09 18:44:33,219 INFO L276 IsEmpty]: Start isEmpty. Operand 14135 states and 49129 transitions. [2021-07-09 18:44:33,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:44:33,242 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:33,242 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] [2021-07-09 18:44:33,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:33,443 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:33,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:33,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1434655568, now seen corresponding path program 93 times [2021-07-09 18:44:33,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:33,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950326634] [2021-07-09 18:44:33,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:33,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:33,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:33,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950326634] [2021-07-09 18:44:33,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950326634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:33,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219171487] [2021-07-09 18:44:33,506 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 [2021-07-09 18:44:33,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:44:33,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:33,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:44:33,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:33,623 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:33,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219171487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:33,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:33,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-07-09 18:44:33,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120466762] [2021-07-09 18:44:33,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:44:33,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:33,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:44:33,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:44:33,624 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) [2021-07-09 18:44:34,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:34,555 INFO L93 Difference]: Finished difference Result 25932 states and 85483 transitions. [2021-07-09 18:44:34,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-09 18:44:34,556 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 [2021-07-09 18:44:34,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:34,619 INFO L225 Difference]: With dead ends: 25932 [2021-07-09 18:44:34,619 INFO L226 Difference]: Without dead ends: 25932 [2021-07-09 18:44:34,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 526.3ms TimeCoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:44:34,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25932 states. [2021-07-09 18:44:34,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25932 to 14667. [2021-07-09 18:44:35,004 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) [2021-07-09 18:44:35,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14667 states to 14667 states and 50677 transitions. [2021-07-09 18:44:35,041 INFO L78 Accepts]: Start accepts. Automaton has 14667 states and 50677 transitions. Word has length 36 [2021-07-09 18:44:35,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:35,041 INFO L482 AbstractCegarLoop]: Abstraction has 14667 states and 50677 transitions. [2021-07-09 18:44:35,041 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) [2021-07-09 18:44:35,041 INFO L276 IsEmpty]: Start isEmpty. Operand 14667 states and 50677 transitions. [2021-07-09 18:44:35,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:44:35,065 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:35,065 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] [2021-07-09 18:44:35,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-09 18:44:35,266 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:35,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:35,266 INFO L82 PathProgramCache]: Analyzing trace with hash 296378270, now seen corresponding path program 94 times [2021-07-09 18:44:35,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:35,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675086732] [2021-07-09 18:44:35,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:35,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:35,321 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:35,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:35,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675086732] [2021-07-09 18:44:35,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675086732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:35,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132684629] [2021-07-09 18:44:35,321 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 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 [2021-07-09 18:44:35,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:44:35,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:35,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:44:35,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:35,449 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:44:35,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132684629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:35,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:35,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-07-09 18:44:35,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737253814] [2021-07-09 18:44:35,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:44:35,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:35,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:44:35,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:44:35,450 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) [2021-07-09 18:44:37,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:37,266 INFO L93 Difference]: Finished difference Result 27978 states and 91670 transitions. [2021-07-09 18:44:37,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-07-09 18:44:37,266 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 [2021-07-09 18:44:37,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:37,336 INFO L225 Difference]: With dead ends: 27978 [2021-07-09 18:44:37,336 INFO L226 Difference]: Without dead ends: 27978 [2021-07-09 18:44:37,337 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5435 ImplicationChecksByTransitivity, 1206.4ms TimeCoverageRelationStatistics Valid=2370, Invalid=10740, Unknown=0, NotChecked=0, Total=13110 [2021-07-09 18:44:37,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27978 states. [2021-07-09 18:44:37,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27978 to 13839. [2021-07-09 18:44:37,727 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) [2021-07-09 18:44:37,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13839 states to 13839 states and 48401 transitions. [2021-07-09 18:44:37,762 INFO L78 Accepts]: Start accepts. Automaton has 13839 states and 48401 transitions. Word has length 36 [2021-07-09 18:44:37,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:37,762 INFO L482 AbstractCegarLoop]: Abstraction has 13839 states and 48401 transitions. [2021-07-09 18:44:37,762 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) [2021-07-09 18:44:37,762 INFO L276 IsEmpty]: Start isEmpty. Operand 13839 states and 48401 transitions. [2021-07-09 18:44:37,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:44:37,784 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:37,784 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] [2021-07-09 18:44:37,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-09 18:44:37,985 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:37,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:37,985 INFO L82 PathProgramCache]: Analyzing trace with hash -384155512, now seen corresponding path program 95 times [2021-07-09 18:44:37,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:37,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223555875] [2021-07-09 18:44:37,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:37,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:38,049 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:38,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:38,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223555875] [2021-07-09 18:44:38,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223555875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:38,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007139698] [2021-07-09 18:44:38,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:44:38,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:44:38,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:38,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:44:38,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:38,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007139698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:38,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:38,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-07-09 18:44:38,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645888302] [2021-07-09 18:44:38,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:44:38,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:38,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:44:38,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:44:38,167 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) [2021-07-09 18:44:39,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:39,477 INFO L93 Difference]: Finished difference Result 26069 states and 86821 transitions. [2021-07-09 18:44:39,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-09 18:44:39,477 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 [2021-07-09 18:44:39,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:39,540 INFO L225 Difference]: With dead ends: 26069 [2021-07-09 18:44:39,540 INFO L226 Difference]: Without dead ends: 25977 [2021-07-09 18:44:39,541 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 753.6ms TimeCoverageRelationStatistics Valid=1207, Invalid=5435, Unknown=0, NotChecked=0, Total=6642 [2021-07-09 18:44:39,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25977 states. [2021-07-09 18:44:39,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25977 to 14407. [2021-07-09 18:44:39,981 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) [2021-07-09 18:44:40,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14407 states to 14407 states and 49998 transitions. [2021-07-09 18:44:40,018 INFO L78 Accepts]: Start accepts. Automaton has 14407 states and 49998 transitions. Word has length 36 [2021-07-09 18:44:40,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:40,018 INFO L482 AbstractCegarLoop]: Abstraction has 14407 states and 49998 transitions. [2021-07-09 18:44:40,018 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) [2021-07-09 18:44:40,018 INFO L276 IsEmpty]: Start isEmpty. Operand 14407 states and 49998 transitions. [2021-07-09 18:44:40,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:44:40,042 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:40,042 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] [2021-07-09 18:44:40,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-07-09 18:44:40,244 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:40,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:40,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1269898876, now seen corresponding path program 96 times [2021-07-09 18:44:40,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:40,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032057574] [2021-07-09 18:44:40,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:40,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:40,299 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:40,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:40,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032057574] [2021-07-09 18:44:40,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032057574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:40,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064181732] [2021-07-09 18:44:40,299 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 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 [2021-07-09 18:44:40,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:44:40,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:40,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:44:40,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:40,415 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 [2021-07-09 18:44:40,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:40,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:40,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:40,424 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-07-09 18:44:40,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:40,474 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 [2021-07-09 18:44:40,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:40,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:40,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:40,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-07-09 18:44:40,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:40,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:40,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:40,519 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 [2021-07-09 18:44:40,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:40,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:40,530 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. [2021-07-09 18:44:40,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:38 [2021-07-09 18:44:40,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:40,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:40,565 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 [2021-07-09 18:44:40,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:40,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:40,576 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. [2021-07-09 18:44:40,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:34 [2021-07-09 18:44:40,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:40,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:40,638 INFO L354 Elim1Store]: treesize reduction 48, result has 25.0 percent of original size [2021-07-09 18:44:40,638 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 [2021-07-09 18:44:40,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:40,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:40,653 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. [2021-07-09 18:44:40,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:46 [2021-07-09 18:44:40,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:40,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:40,737 INFO L354 Elim1Store]: treesize reduction 88, result has 19.3 percent of original size [2021-07-09 18:44:40,737 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 [2021-07-09 18:44:40,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:40,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:40,758 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. [2021-07-09 18:44:40,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:58 [2021-07-09 18:44:40,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:40,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:40,899 INFO L354 Elim1Store]: treesize reduction 136, result has 16.0 percent of original size [2021-07-09 18:44:40,899 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 [2021-07-09 18:44:40,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:40,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:40,925 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. [2021-07-09 18:44:40,925 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:71, output treesize:70 [2021-07-09 18:44:41,082 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:41,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064181732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:41,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:41,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-07-09 18:44:41,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205592954] [2021-07-09 18:44:41,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:44:41,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:41,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:44:41,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:44:41,083 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) [2021-07-09 18:44:43,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:43,761 INFO L93 Difference]: Finished difference Result 19437 states and 64480 transitions. [2021-07-09 18:44:43,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 18:44:43,762 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 [2021-07-09 18:44:43,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:43,805 INFO L225 Difference]: With dead ends: 19437 [2021-07-09 18:44:43,805 INFO L226 Difference]: Without dead ends: 19021 [2021-07-09 18:44:43,806 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1992 ImplicationChecksByTransitivity, 1778.6ms TimeCoverageRelationStatistics Valid=651, Invalid=5829, Unknown=0, NotChecked=0, Total=6480 [2021-07-09 18:44:43,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19021 states. [2021-07-09 18:44:44,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19021 to 15957. [2021-07-09 18:44:44,181 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) [2021-07-09 18:44:44,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15957 states to 15957 states and 54836 transitions. [2021-07-09 18:44:44,221 INFO L78 Accepts]: Start accepts. Automaton has 15957 states and 54836 transitions. Word has length 36 [2021-07-09 18:44:44,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:44,221 INFO L482 AbstractCegarLoop]: Abstraction has 15957 states and 54836 transitions. [2021-07-09 18:44:44,221 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) [2021-07-09 18:44:44,221 INFO L276 IsEmpty]: Start isEmpty. Operand 15957 states and 54836 transitions. [2021-07-09 18:44:44,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:44:44,246 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:44,247 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] [2021-07-09 18:44:44,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:44,448 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:44,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:44,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1525571952, now seen corresponding path program 97 times [2021-07-09 18:44:44,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:44,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980737247] [2021-07-09 18:44:44,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:44,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:44,514 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:44,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:44,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980737247] [2021-07-09 18:44:44,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980737247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:44,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644845106] [2021-07-09 18:44:44,515 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 [2021-07-09 18:44:44,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:44,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:44:44,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:44,688 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:44,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644845106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:44,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:44,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 18:44:44,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744729763] [2021-07-09 18:44:44,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:44:44,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:44,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:44:44,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:44:44,689 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) [2021-07-09 18:44:46,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:46,003 INFO L93 Difference]: Finished difference Result 31024 states and 101059 transitions. [2021-07-09 18:44:46,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 18:44:46,003 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 [2021-07-09 18:44:46,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:46,079 INFO L225 Difference]: With dead ends: 31024 [2021-07-09 18:44:46,079 INFO L226 Difference]: Without dead ends: 31024 [2021-07-09 18:44:46,080 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1828 ImplicationChecksByTransitivity, 850.4ms TimeCoverageRelationStatistics Valid=1344, Invalid=3912, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:44:46,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31024 states. [2021-07-09 18:44:46,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31024 to 16979. [2021-07-09 18:44:46,542 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) [2021-07-09 18:44:46,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16979 states to 16979 states and 57865 transitions. [2021-07-09 18:44:46,584 INFO L78 Accepts]: Start accepts. Automaton has 16979 states and 57865 transitions. Word has length 36 [2021-07-09 18:44:46,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:46,584 INFO L482 AbstractCegarLoop]: Abstraction has 16979 states and 57865 transitions. [2021-07-09 18:44:46,584 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) [2021-07-09 18:44:46,584 INFO L276 IsEmpty]: Start isEmpty. Operand 16979 states and 57865 transitions. [2021-07-09 18:44:46,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:44:46,611 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:46,611 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] [2021-07-09 18:44:46,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-07-09 18:44:46,811 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:46,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:46,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1354812750, now seen corresponding path program 98 times [2021-07-09 18:44:46,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:46,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727666323] [2021-07-09 18:44:46,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:46,869 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:46,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:46,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727666323] [2021-07-09 18:44:46,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727666323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:46,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562103382] [2021-07-09 18:44:46,869 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 [2021-07-09 18:44:46,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:44:46,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:46,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:44:46,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:47,058 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:44:47,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562103382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:47,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:47,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-07-09 18:44:47,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924377114] [2021-07-09 18:44:47,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:44:47,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:47,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:44:47,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:44:47,185 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) [2021-07-09 18:44:49,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:49,794 INFO L93 Difference]: Finished difference Result 33282 states and 107796 transitions. [2021-07-09 18:44:49,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-07-09 18:44:49,794 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 [2021-07-09 18:44:49,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:49,878 INFO L225 Difference]: With dead ends: 33282 [2021-07-09 18:44:49,879 INFO L226 Difference]: Without dead ends: 33254 [2021-07-09 18:44:49,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7204 ImplicationChecksByTransitivity, 1787.8ms TimeCoverageRelationStatistics Valid=3502, Invalid=14320, Unknown=0, NotChecked=0, Total=17822 [2021-07-09 18:44:49,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33254 states. [2021-07-09 18:44:50,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33254 to 16803. [2021-07-09 18:44:50,374 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) [2021-07-09 18:44:50,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16803 states to 16803 states and 57313 transitions. [2021-07-09 18:44:50,419 INFO L78 Accepts]: Start accepts. Automaton has 16803 states and 57313 transitions. Word has length 36 [2021-07-09 18:44:50,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:50,419 INFO L482 AbstractCegarLoop]: Abstraction has 16803 states and 57313 transitions. [2021-07-09 18:44:50,419 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) [2021-07-09 18:44:50,419 INFO L276 IsEmpty]: Start isEmpty. Operand 16803 states and 57313 transitions. [2021-07-09 18:44:50,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:44:50,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:50,554 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] [2021-07-09 18:44:50,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-09 18:44:50,755 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:50,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:50,755 INFO L82 PathProgramCache]: Analyzing trace with hash 2057609742, now seen corresponding path program 99 times [2021-07-09 18:44:50,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:50,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108986335] [2021-07-09 18:44:50,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:50,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:50,821 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:50,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:50,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108986335] [2021-07-09 18:44:50,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108986335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:50,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268972221] [2021-07-09 18:44:50,821 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 [2021-07-09 18:44:50,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 18:44:50,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:50,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:44:50,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:50,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268972221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:50,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:50,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 18:44:50,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587573226] [2021-07-09 18:44:50,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:44:50,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:50,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:44:50,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:44:50,991 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) [2021-07-09 18:44:52,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:52,521 INFO L93 Difference]: Finished difference Result 30475 states and 100578 transitions. [2021-07-09 18:44:52,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-07-09 18:44:52,521 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 [2021-07-09 18:44:52,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:52,596 INFO L225 Difference]: With dead ends: 30475 [2021-07-09 18:44:52,597 INFO L226 Difference]: Without dead ends: 30411 [2021-07-09 18:44:52,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2777 ImplicationChecksByTransitivity, 981.0ms TimeCoverageRelationStatistics Valid=1678, Invalid=5978, Unknown=0, NotChecked=0, Total=7656 [2021-07-09 18:44:52,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30411 states. [2021-07-09 18:44:52,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30411 to 16624. [2021-07-09 18:44:53,014 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) [2021-07-09 18:44:53,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16624 states to 16624 states and 56708 transitions. [2021-07-09 18:44:53,057 INFO L78 Accepts]: Start accepts. Automaton has 16624 states and 56708 transitions. Word has length 36 [2021-07-09 18:44:53,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:53,057 INFO L482 AbstractCegarLoop]: Abstraction has 16624 states and 56708 transitions. [2021-07-09 18:44:53,057 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) [2021-07-09 18:44:53,057 INFO L276 IsEmpty]: Start isEmpty. Operand 16624 states and 56708 transitions. [2021-07-09 18:44:53,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:44:53,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:53,083 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] [2021-07-09 18:44:53,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:53,284 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:53,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:53,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1448352448, now seen corresponding path program 100 times [2021-07-09 18:44:53,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:53,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304501096] [2021-07-09 18:44:53,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:53,350 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:53,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:53,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304501096] [2021-07-09 18:44:53,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304501096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:53,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475810984] [2021-07-09 18:44:53,350 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 [2021-07-09 18:44:53,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:44:53,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:53,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:44:53,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:53,530 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:53,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475810984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:53,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:53,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-07-09 18:44:53,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828846528] [2021-07-09 18:44:53,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:44:53,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:53,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:44:53,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:44:53,531 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) [2021-07-09 18:44:54,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:54,584 INFO L93 Difference]: Finished difference Result 32379 states and 105054 transitions. [2021-07-09 18:44:54,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:44:54,585 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 [2021-07-09 18:44:54,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:54,668 INFO L225 Difference]: With dead ends: 32379 [2021-07-09 18:44:54,669 INFO L226 Difference]: Without dead ends: 32379 [2021-07-09 18:44:54,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 572.1ms TimeCoverageRelationStatistics Valid=832, Invalid=2360, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:44:54,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32379 states. [2021-07-09 18:44:55,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32379 to 17402. [2021-07-09 18:44:55,152 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) [2021-07-09 18:44:55,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17402 states to 17402 states and 59139 transitions. [2021-07-09 18:44:55,196 INFO L78 Accepts]: Start accepts. Automaton has 17402 states and 59139 transitions. Word has length 36 [2021-07-09 18:44:55,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:55,196 INFO L482 AbstractCegarLoop]: Abstraction has 17402 states and 59139 transitions. [2021-07-09 18:44:55,196 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) [2021-07-09 18:44:55,196 INFO L276 IsEmpty]: Start isEmpty. Operand 17402 states and 59139 transitions. [2021-07-09 18:44:55,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:44:55,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:55,225 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] [2021-07-09 18:44:55,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:55,425 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:55,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:55,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1791237454, now seen corresponding path program 101 times [2021-07-09 18:44:55,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:55,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866292484] [2021-07-09 18:44:55,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:55,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:55,482 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:55,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:55,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866292484] [2021-07-09 18:44:55,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866292484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:55,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626816541] [2021-07-09 18:44:55,483 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 [2021-07-09 18:44:55,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:44:55,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:55,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:44:55,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:55,641 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:55,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626816541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:55,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:55,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-07-09 18:44:55,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552072836] [2021-07-09 18:44:55,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:44:55,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:55,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:44:55,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:44:55,642 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) [2021-07-09 18:44:56,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:56,483 INFO L93 Difference]: Finished difference Result 31791 states and 103499 transitions. [2021-07-09 18:44:56,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:44:56,483 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 [2021-07-09 18:44:56,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:56,560 INFO L225 Difference]: With dead ends: 31791 [2021-07-09 18:44:56,560 INFO L226 Difference]: Without dead ends: 31779 [2021-07-09 18:44:56,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 455.9ms TimeCoverageRelationStatistics Valid=606, Invalid=1944, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:44:56,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31779 states. [2021-07-09 18:44:57,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31779 to 17354. [2021-07-09 18:44:57,136 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) [2021-07-09 18:44:57,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17354 states to 17354 states and 58983 transitions. [2021-07-09 18:44:57,181 INFO L78 Accepts]: Start accepts. Automaton has 17354 states and 58983 transitions. Word has length 36 [2021-07-09 18:44:57,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:57,181 INFO L482 AbstractCegarLoop]: Abstraction has 17354 states and 58983 transitions. [2021-07-09 18:44:57,181 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) [2021-07-09 18:44:57,181 INFO L276 IsEmpty]: Start isEmpty. Operand 17354 states and 58983 transitions. [2021-07-09 18:44:57,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:44:57,209 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:57,209 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] [2021-07-09 18:44:57,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:57,410 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:57,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:57,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1020594904, now seen corresponding path program 102 times [2021-07-09 18:44:57,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:57,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242385388] [2021-07-09 18:44:57,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:57,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:57,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:57,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242385388] [2021-07-09 18:44:57,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242385388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:57,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432565399] [2021-07-09 18:44:57,465 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 [2021-07-09 18:44:57,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:44:57,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:57,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:44:57,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:57,613 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:44:57,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432565399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:57,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:57,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-07-09 18:44:57,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7131868] [2021-07-09 18:44:57,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:44:57,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:57,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:44:57,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:44:57,614 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) [2021-07-09 18:45:00,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:00,823 INFO L93 Difference]: Finished difference Result 32845 states and 106582 transitions. [2021-07-09 18:45:00,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-07-09 18:45:00,823 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 [2021-07-09 18:45:00,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:00,905 INFO L225 Difference]: With dead ends: 32845 [2021-07-09 18:45:00,905 INFO L226 Difference]: Without dead ends: 32825 [2021-07-09 18:45:00,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11588 ImplicationChecksByTransitivity, 2280.4ms TimeCoverageRelationStatistics Valid=4603, Invalid=23453, Unknown=0, NotChecked=0, Total=28056 [2021-07-09 18:45:00,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32825 states. [2021-07-09 18:45:01,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32825 to 17254. [2021-07-09 18:45:01,474 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) [2021-07-09 18:45:01,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17254 states to 17254 states and 58709 transitions. [2021-07-09 18:45:01,521 INFO L78 Accepts]: Start accepts. Automaton has 17254 states and 58709 transitions. Word has length 36 [2021-07-09 18:45:01,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:01,521 INFO L482 AbstractCegarLoop]: Abstraction has 17254 states and 58709 transitions. [2021-07-09 18:45:01,521 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) [2021-07-09 18:45:01,521 INFO L276 IsEmpty]: Start isEmpty. Operand 17254 states and 58709 transitions. [2021-07-09 18:45:01,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:45:01,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:01,554 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] [2021-07-09 18:45:01,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-07-09 18:45:01,755 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:01,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:01,755 INFO L82 PathProgramCache]: Analyzing trace with hash 590890608, now seen corresponding path program 103 times [2021-07-09 18:45:01,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:01,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480907258] [2021-07-09 18:45:01,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:01,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:01,806 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:45:01,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:01,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480907258] [2021-07-09 18:45:01,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480907258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:01,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422854318] [2021-07-09 18:45:01,807 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 [2021-07-09 18:45:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:01,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:45:01,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:01,968 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:01,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422854318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:01,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:01,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-09 18:45:01,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686249892] [2021-07-09 18:45:01,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:45:01,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:01,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:45:01,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:45:01,969 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) [2021-07-09 18:45:02,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:02,737 INFO L93 Difference]: Finished difference Result 36771 states and 121891 transitions. [2021-07-09 18:45:02,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:45:02,737 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 [2021-07-09 18:45:02,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:02,834 INFO L225 Difference]: With dead ends: 36771 [2021-07-09 18:45:02,834 INFO L226 Difference]: Without dead ends: 36771 [2021-07-09 18:45:02,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 329.5ms TimeCoverageRelationStatistics Valid=403, Invalid=1157, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:45:02,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36771 states. [2021-07-09 18:45:03,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36771 to 17615. [2021-07-09 18:45:03,379 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) [2021-07-09 18:45:03,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17615 states to 17615 states and 60269 transitions. [2021-07-09 18:45:03,608 INFO L78 Accepts]: Start accepts. Automaton has 17615 states and 60269 transitions. Word has length 36 [2021-07-09 18:45:03,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:03,608 INFO L482 AbstractCegarLoop]: Abstraction has 17615 states and 60269 transitions. [2021-07-09 18:45:03,608 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) [2021-07-09 18:45:03,608 INFO L276 IsEmpty]: Start isEmpty. Operand 17615 states and 60269 transitions. [2021-07-09 18:45:03,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:45:03,636 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:03,636 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] [2021-07-09 18:45:03,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-09 18:45:03,837 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:03,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:03,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1255821764, now seen corresponding path program 104 times [2021-07-09 18:45:03,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:03,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896374701] [2021-07-09 18:45:03,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:03,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:03,906 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:03,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:03,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896374701] [2021-07-09 18:45:03,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896374701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:03,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246407570] [2021-07-09 18:45:03,906 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 [2021-07-09 18:45:03,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:45:03,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:03,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:45:03,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:04,079 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:45:04,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246407570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:04,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:04,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-07-09 18:45:04,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15861914] [2021-07-09 18:45:04,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:45:04,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:04,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:45:04,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:45:04,080 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) [2021-07-09 18:45:07,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:07,413 INFO L93 Difference]: Finished difference Result 43448 states and 142049 transitions. [2021-07-09 18:45:07,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-07-09 18:45:07,413 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 [2021-07-09 18:45:07,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:07,666 INFO L225 Difference]: With dead ends: 43448 [2021-07-09 18:45:07,666 INFO L226 Difference]: Without dead ends: 43448 [2021-07-09 18:45:07,667 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11743 ImplicationChecksByTransitivity, 2259.3ms TimeCoverageRelationStatistics Valid=5181, Invalid=22209, Unknown=0, NotChecked=0, Total=27390 [2021-07-09 18:45:07,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43448 states. [2021-07-09 18:45:08,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43448 to 17843. [2021-07-09 18:45:08,350 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) [2021-07-09 18:45:08,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17843 states to 17843 states and 61449 transitions. [2021-07-09 18:45:08,396 INFO L78 Accepts]: Start accepts. Automaton has 17843 states and 61449 transitions. Word has length 36 [2021-07-09 18:45:08,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:08,396 INFO L482 AbstractCegarLoop]: Abstraction has 17843 states and 61449 transitions. [2021-07-09 18:45:08,396 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) [2021-07-09 18:45:08,397 INFO L276 IsEmpty]: Start isEmpty. Operand 17843 states and 61449 transitions. [2021-07-09 18:45:08,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:45:08,424 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:08,424 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] [2021-07-09 18:45:08,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-07-09 18:45:08,625 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:08,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:08,626 INFO L82 PathProgramCache]: Analyzing trace with hash -428849322, now seen corresponding path program 105 times [2021-07-09 18:45:08,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:08,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401210301] [2021-07-09 18:45:08,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:08,800 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:08,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:08,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401210301] [2021-07-09 18:45:08,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401210301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:08,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834378330] [2021-07-09 18:45:08,801 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 [2021-07-09 18:45:08,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:45:08,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:08,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:45:08,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:08,957 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:08,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834378330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:08,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:08,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 18:45:08,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674623999] [2021-07-09 18:45:08,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:45:08,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:08,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:45:08,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:45:08,958 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) [2021-07-09 18:45:11,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:11,329 INFO L93 Difference]: Finished difference Result 39837 states and 131123 transitions. [2021-07-09 18:45:11,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-07-09 18:45:11,329 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 [2021-07-09 18:45:11,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:11,444 INFO L225 Difference]: With dead ends: 39837 [2021-07-09 18:45:11,444 INFO L226 Difference]: Without dead ends: 39721 [2021-07-09 18:45:11,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6312 ImplicationChecksByTransitivity, 1559.3ms TimeCoverageRelationStatistics Valid=3104, Invalid=12396, Unknown=0, NotChecked=0, Total=15500 [2021-07-09 18:45:11,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39721 states. [2021-07-09 18:45:12,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39721 to 17669. [2021-07-09 18:45:12,229 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) [2021-07-09 18:45:12,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17669 states to 17669 states and 60918 transitions. [2021-07-09 18:45:12,276 INFO L78 Accepts]: Start accepts. Automaton has 17669 states and 60918 transitions. Word has length 36 [2021-07-09 18:45:12,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:12,276 INFO L482 AbstractCegarLoop]: Abstraction has 17669 states and 60918 transitions. [2021-07-09 18:45:12,276 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) [2021-07-09 18:45:12,276 INFO L276 IsEmpty]: Start isEmpty. Operand 17669 states and 60918 transitions. [2021-07-09 18:45:12,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:45:12,305 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:12,305 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] [2021-07-09 18:45:12,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-09 18:45:12,505 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:12,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:12,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1065316176, now seen corresponding path program 106 times [2021-07-09 18:45:12,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:12,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397871678] [2021-07-09 18:45:12,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:12,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:12,585 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:12,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:12,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397871678] [2021-07-09 18:45:12,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397871678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:12,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648004964] [2021-07-09 18:45:12,586 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 [2021-07-09 18:45:12,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:45:12,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:12,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:45:12,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:45:12,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648004964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:12,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:12,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-07-09 18:45:12,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572950807] [2021-07-09 18:45:12,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:45:12,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:12,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:45:12,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:45:12,732 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) [2021-07-09 18:45:14,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:14,994 INFO L93 Difference]: Finished difference Result 38843 states and 128526 transitions. [2021-07-09 18:45:14,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-07-09 18:45:14,994 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 [2021-07-09 18:45:14,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:15,129 INFO L225 Difference]: With dead ends: 38843 [2021-07-09 18:45:15,129 INFO L226 Difference]: Without dead ends: 38727 [2021-07-09 18:45:15,130 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5135 ImplicationChecksByTransitivity, 1346.1ms TimeCoverageRelationStatistics Valid=2357, Invalid=10983, Unknown=0, NotChecked=0, Total=13340 [2021-07-09 18:45:15,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38727 states. [2021-07-09 18:45:15,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38727 to 17699. [2021-07-09 18:45:15,919 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) [2021-07-09 18:45:15,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17699 states to 17699 states and 60991 transitions. [2021-07-09 18:45:15,963 INFO L78 Accepts]: Start accepts. Automaton has 17699 states and 60991 transitions. Word has length 36 [2021-07-09 18:45:15,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:15,964 INFO L482 AbstractCegarLoop]: Abstraction has 17699 states and 60991 transitions. [2021-07-09 18:45:15,964 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) [2021-07-09 18:45:15,964 INFO L276 IsEmpty]: Start isEmpty. Operand 17699 states and 60991 transitions. [2021-07-09 18:45:15,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:45:15,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:15,991 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] [2021-07-09 18:45:16,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:16,192 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:16,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:16,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1348989260, now seen corresponding path program 107 times [2021-07-09 18:45:16,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:16,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814823656] [2021-07-09 18:45:16,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:16,259 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:16,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:16,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814823656] [2021-07-09 18:45:16,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814823656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:16,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083683622] [2021-07-09 18:45:16,259 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 [2021-07-09 18:45:16,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:45:16,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:16,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:45:16,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:45:16,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083683622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:16,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:16,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2021-07-09 18:45:16,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490407287] [2021-07-09 18:45:16,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:45:16,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:16,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:45:16,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:45:16,398 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) [2021-07-09 18:45:18,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:18,507 INFO L93 Difference]: Finished difference Result 37783 states and 125271 transitions. [2021-07-09 18:45:18,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-07-09 18:45:18,507 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 [2021-07-09 18:45:18,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:18,635 INFO L225 Difference]: With dead ends: 37783 [2021-07-09 18:45:18,635 INFO L226 Difference]: Without dead ends: 37663 [2021-07-09 18:45:18,636 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4108 ImplicationChecksByTransitivity, 1317.7ms TimeCoverageRelationStatistics Valid=2049, Invalid=9081, Unknown=0, NotChecked=0, Total=11130 [2021-07-09 18:45:18,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37663 states. [2021-07-09 18:45:19,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37663 to 18035. [2021-07-09 18:45:19,396 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) [2021-07-09 18:45:19,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18035 states to 18035 states and 62338 transitions. [2021-07-09 18:45:19,447 INFO L78 Accepts]: Start accepts. Automaton has 18035 states and 62338 transitions. Word has length 36 [2021-07-09 18:45:19,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:19,447 INFO L482 AbstractCegarLoop]: Abstraction has 18035 states and 62338 transitions. [2021-07-09 18:45:19,447 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) [2021-07-09 18:45:19,448 INFO L276 IsEmpty]: Start isEmpty. Operand 18035 states and 62338 transitions. [2021-07-09 18:45:19,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:45:19,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:19,482 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] [2021-07-09 18:45:19,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-07-09 18:45:19,683 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:19,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:19,683 INFO L82 PathProgramCache]: Analyzing trace with hash 255839428, now seen corresponding path program 108 times [2021-07-09 18:45:19,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:19,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087557243] [2021-07-09 18:45:19,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:19,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:19,727 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:45:19,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:19,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087557243] [2021-07-09 18:45:19,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087557243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:19,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449558979] [2021-07-09 18:45:19,728 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 [2021-07-09 18:45:19,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:45:19,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:19,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:45:19,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:19,870 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:19,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449558979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:19,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:19,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:45:19,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339135881] [2021-07-09 18:45:19,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:45:19,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:19,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:45:19,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:45:19,871 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) [2021-07-09 18:45:21,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:21,693 INFO L93 Difference]: Finished difference Result 41243 states and 137063 transitions. [2021-07-09 18:45:21,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-09 18:45:21,693 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 [2021-07-09 18:45:21,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:21,817 INFO L225 Difference]: With dead ends: 41243 [2021-07-09 18:45:21,818 INFO L226 Difference]: Without dead ends: 41243 [2021-07-09 18:45:21,818 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2866 ImplicationChecksByTransitivity, 946.5ms TimeCoverageRelationStatistics Valid=1732, Invalid=6100, Unknown=0, NotChecked=0, Total=7832 [2021-07-09 18:45:21,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41243 states. [2021-07-09 18:45:22,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41243 to 18004. [2021-07-09 18:45:22,588 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) [2021-07-09 18:45:22,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18004 states to 18004 states and 62300 transitions. [2021-07-09 18:45:22,635 INFO L78 Accepts]: Start accepts. Automaton has 18004 states and 62300 transitions. Word has length 36 [2021-07-09 18:45:22,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:22,635 INFO L482 AbstractCegarLoop]: Abstraction has 18004 states and 62300 transitions. [2021-07-09 18:45:22,635 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) [2021-07-09 18:45:22,636 INFO L276 IsEmpty]: Start isEmpty. Operand 18004 states and 62300 transitions. [2021-07-09 18:45:22,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:45:22,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:22,664 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] [2021-07-09 18:45:22,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-07-09 18:45:22,865 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:22,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:22,865 INFO L82 PathProgramCache]: Analyzing trace with hash 30795628, now seen corresponding path program 109 times [2021-07-09 18:45:22,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:22,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16649153] [2021-07-09 18:45:22,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:22,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:23,067 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:23,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:23,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16649153] [2021-07-09 18:45:23,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16649153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:23,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355876717] [2021-07-09 18:45:23,068 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 [2021-07-09 18:45:23,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:23,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:45:23,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:23,183 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:45:23,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355876717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:23,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:23,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-07-09 18:45:23,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280336005] [2021-07-09 18:45:23,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:45:23,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:23,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:45:23,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:45:23,184 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) [2021-07-09 18:45:24,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:24,735 INFO L93 Difference]: Finished difference Result 39031 states and 128601 transitions. [2021-07-09 18:45:24,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-07-09 18:45:24,736 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 [2021-07-09 18:45:24,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:24,838 INFO L225 Difference]: With dead ends: 39031 [2021-07-09 18:45:24,838 INFO L226 Difference]: Without dead ends: 38811 [2021-07-09 18:45:24,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2721 ImplicationChecksByTransitivity, 868.9ms TimeCoverageRelationStatistics Valid=1466, Invalid=6190, Unknown=0, NotChecked=0, Total=7656 [2021-07-09 18:45:24,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38811 states. [2021-07-09 18:45:25,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38811 to 18070. [2021-07-09 18:45:25,478 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) [2021-07-09 18:45:25,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18070 states to 18070 states and 62489 transitions. [2021-07-09 18:45:25,525 INFO L78 Accepts]: Start accepts. Automaton has 18070 states and 62489 transitions. Word has length 36 [2021-07-09 18:45:25,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:25,525 INFO L482 AbstractCegarLoop]: Abstraction has 18070 states and 62489 transitions. [2021-07-09 18:45:25,525 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) [2021-07-09 18:45:25,525 INFO L276 IsEmpty]: Start isEmpty. Operand 18070 states and 62489 transitions. [2021-07-09 18:45:25,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:45:25,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:25,554 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] [2021-07-09 18:45:25,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:25,755 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:25,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:25,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1503096560, now seen corresponding path program 110 times [2021-07-09 18:45:25,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:25,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614441843] [2021-07-09 18:45:25,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:25,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:25,810 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:25,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:25,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614441843] [2021-07-09 18:45:25,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614441843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:25,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863089146] [2021-07-09 18:45:25,810 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 [2021-07-09 18:45:25,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:45:25,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:25,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:45:25,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:25,933 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:45:25,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863089146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:25,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:25,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-07-09 18:45:25,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744353064] [2021-07-09 18:45:25,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:45:25,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:25,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:45:25,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:45:25,934 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) [2021-07-09 18:45:28,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:28,385 INFO L93 Difference]: Finished difference Result 41905 states and 136821 transitions. [2021-07-09 18:45:28,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-07-09 18:45:28,386 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 [2021-07-09 18:45:28,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:28,513 INFO L225 Difference]: With dead ends: 41905 [2021-07-09 18:45:28,513 INFO L226 Difference]: Without dead ends: 41889 [2021-07-09 18:45:28,514 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7569 ImplicationChecksByTransitivity, 1656.5ms TimeCoverageRelationStatistics Valid=3281, Invalid=14541, Unknown=0, NotChecked=0, Total=17822 [2021-07-09 18:45:28,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41889 states. [2021-07-09 18:45:29,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41889 to 18381. [2021-07-09 18:45:29,296 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) [2021-07-09 18:45:29,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18381 states to 18381 states and 63217 transitions. [2021-07-09 18:45:29,348 INFO L78 Accepts]: Start accepts. Automaton has 18381 states and 63217 transitions. Word has length 36 [2021-07-09 18:45:29,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:29,348 INFO L482 AbstractCegarLoop]: Abstraction has 18381 states and 63217 transitions. [2021-07-09 18:45:29,349 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) [2021-07-09 18:45:29,349 INFO L276 IsEmpty]: Start isEmpty. Operand 18381 states and 63217 transitions. [2021-07-09 18:45:29,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:45:29,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:29,379 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] [2021-07-09 18:45:29,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:29,580 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:29,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:29,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1164442992, now seen corresponding path program 111 times [2021-07-09 18:45:29,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:29,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807518360] [2021-07-09 18:45:29,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:29,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:29,649 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:29,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:29,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807518360] [2021-07-09 18:45:29,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807518360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:29,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514169373] [2021-07-09 18:45:29,649 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 [2021-07-09 18:45:29,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:45:29,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:29,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:45:29,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:29,771 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:29,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514169373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:29,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:29,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-07-09 18:45:29,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743012903] [2021-07-09 18:45:29,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:45:29,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:29,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:45:29,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:45:29,772 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) [2021-07-09 18:45:31,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:31,747 INFO L93 Difference]: Finished difference Result 39347 states and 129043 transitions. [2021-07-09 18:45:31,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-07-09 18:45:31,747 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 [2021-07-09 18:45:31,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:31,843 INFO L225 Difference]: With dead ends: 39347 [2021-07-09 18:45:31,844 INFO L226 Difference]: Without dead ends: 39111 [2021-07-09 18:45:31,844 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3939 ImplicationChecksByTransitivity, 1110.1ms TimeCoverageRelationStatistics Valid=2013, Invalid=8907, Unknown=0, NotChecked=0, Total=10920 [2021-07-09 18:45:31,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39111 states. [2021-07-09 18:45:32,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39111 to 18459. [2021-07-09 18:45:32,514 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) [2021-07-09 18:45:32,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18459 states to 18459 states and 63440 transitions. [2021-07-09 18:45:32,568 INFO L78 Accepts]: Start accepts. Automaton has 18459 states and 63440 transitions. Word has length 36 [2021-07-09 18:45:32,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:32,569 INFO L482 AbstractCegarLoop]: Abstraction has 18459 states and 63440 transitions. [2021-07-09 18:45:32,569 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) [2021-07-09 18:45:32,569 INFO L276 IsEmpty]: Start isEmpty. Operand 18459 states and 63440 transitions. [2021-07-09 18:45:32,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:45:32,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:32,599 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] [2021-07-09 18:45:32,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:32,799 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:32,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:32,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1293569036, now seen corresponding path program 112 times [2021-07-09 18:45:32,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:32,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421483839] [2021-07-09 18:45:32,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:32,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:32,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:32,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421483839] [2021-07-09 18:45:32,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421483839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:32,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923870021] [2021-07-09 18:45:32,862 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 [2021-07-09 18:45:32,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:45:32,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:32,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:45:32,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:33,011 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:45:33,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923870021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:33,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:33,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 18 [2021-07-09 18:45:33,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103484203] [2021-07-09 18:45:33,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:45:33,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:33,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:45:33,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:45:33,012 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) [2021-07-09 18:45:35,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:35,049 INFO L93 Difference]: Finished difference Result 38875 states and 128248 transitions. [2021-07-09 18:45:35,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-07-09 18:45:35,050 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 [2021-07-09 18:45:35,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:35,149 INFO L225 Difference]: With dead ends: 38875 [2021-07-09 18:45:35,149 INFO L226 Difference]: Without dead ends: 38767 [2021-07-09 18:45:35,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4742 ImplicationChecksByTransitivity, 1243.7ms TimeCoverageRelationStatistics Valid=2364, Invalid=9626, Unknown=0, NotChecked=0, Total=11990 [2021-07-09 18:45:35,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38767 states. [2021-07-09 18:45:35,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38767 to 18901. [2021-07-09 18:45:35,857 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) [2021-07-09 18:45:35,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18901 states to 18901 states and 64633 transitions. [2021-07-09 18:45:35,907 INFO L78 Accepts]: Start accepts. Automaton has 18901 states and 64633 transitions. Word has length 36 [2021-07-09 18:45:35,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:35,907 INFO L482 AbstractCegarLoop]: Abstraction has 18901 states and 64633 transitions. [2021-07-09 18:45:35,907 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) [2021-07-09 18:45:35,907 INFO L276 IsEmpty]: Start isEmpty. Operand 18901 states and 64633 transitions. [2021-07-09 18:45:35,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:45:35,937 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:35,937 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] [2021-07-09 18:45:36,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-07-09 18:45:36,137 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:36,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:36,138 INFO L82 PathProgramCache]: Analyzing trace with hash -253287824, now seen corresponding path program 113 times [2021-07-09 18:45:36,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:36,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7309702] [2021-07-09 18:45:36,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:36,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:36,202 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:36,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:36,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7309702] [2021-07-09 18:45:36,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7309702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:36,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656716679] [2021-07-09 18:45:36,202 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 [2021-07-09 18:45:36,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:45:36,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:36,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:45:36,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:36,335 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:36,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656716679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:36,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:36,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2021-07-09 18:45:36,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425842471] [2021-07-09 18:45:36,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:45:36,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:36,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:45:36,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:45:36,336 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) [2021-07-09 18:45:39,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:39,084 INFO L93 Difference]: Finished difference Result 40691 states and 133194 transitions. [2021-07-09 18:45:39,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-07-09 18:45:39,084 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 [2021-07-09 18:45:39,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:39,181 INFO L225 Difference]: With dead ends: 40691 [2021-07-09 18:45:39,181 INFO L226 Difference]: Without dead ends: 40691 [2021-07-09 18:45:39,182 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10041 ImplicationChecksByTransitivity, 1839.6ms TimeCoverageRelationStatistics Valid=4335, Invalid=18315, Unknown=0, NotChecked=0, Total=22650 [2021-07-09 18:45:39,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40691 states. [2021-07-09 18:45:39,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40691 to 17027. [2021-07-09 18:45:39,835 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) [2021-07-09 18:45:39,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17027 states to 17027 states and 59286 transitions. [2021-07-09 18:45:39,878 INFO L78 Accepts]: Start accepts. Automaton has 17027 states and 59286 transitions. Word has length 36 [2021-07-09 18:45:39,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:39,878 INFO L482 AbstractCegarLoop]: Abstraction has 17027 states and 59286 transitions. [2021-07-09 18:45:39,878 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) [2021-07-09 18:45:39,878 INFO L276 IsEmpty]: Start isEmpty. Operand 17027 states and 59286 transitions. [2021-07-09 18:45:39,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:45:39,905 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:39,905 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] [2021-07-09 18:45:40,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-07-09 18:45:40,106 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:40,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:40,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1172720400, now seen corresponding path program 114 times [2021-07-09 18:45:40,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:40,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128274930] [2021-07-09 18:45:40,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:45:40,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:40,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128274930] [2021-07-09 18:45:40,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128274930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:40,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567327862] [2021-07-09 18:45:40,161 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 [2021-07-09 18:45:40,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:45:40,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:40,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:45:40,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:40,326 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:40,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567327862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:40,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:40,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-09 18:45:40,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712348556] [2021-07-09 18:45:40,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:45:40,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:40,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:45:40,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:45:40,327 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) [2021-07-09 18:45:41,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:41,351 INFO L93 Difference]: Finished difference Result 36359 states and 121507 transitions. [2021-07-09 18:45:41,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:45:41,351 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 [2021-07-09 18:45:41,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:41,455 INFO L225 Difference]: With dead ends: 36359 [2021-07-09 18:45:41,455 INFO L226 Difference]: Without dead ends: 36359 [2021-07-09 18:45:41,455 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 421.1ms TimeCoverageRelationStatistics Valid=568, Invalid=1784, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:45:41,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36359 states. [2021-07-09 18:45:42,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36359 to 17013. [2021-07-09 18:45:42,049 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) [2021-07-09 18:45:42,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17013 states to 17013 states and 59155 transitions. [2021-07-09 18:45:42,094 INFO L78 Accepts]: Start accepts. Automaton has 17013 states and 59155 transitions. Word has length 36 [2021-07-09 18:45:42,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:42,095 INFO L482 AbstractCegarLoop]: Abstraction has 17013 states and 59155 transitions. [2021-07-09 18:45:42,095 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) [2021-07-09 18:45:42,095 INFO L276 IsEmpty]: Start isEmpty. Operand 17013 states and 59155 transitions. [2021-07-09 18:45:42,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:45:42,122 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:42,123 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] [2021-07-09 18:45:42,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-07-09 18:45:42,323 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:42,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:42,323 INFO L82 PathProgramCache]: Analyzing trace with hash -248629260, now seen corresponding path program 115 times [2021-07-09 18:45:42,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:42,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547310082] [2021-07-09 18:45:42,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:42,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:42,381 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:45:42,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:42,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547310082] [2021-07-09 18:45:42,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547310082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:42,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466439853] [2021-07-09 18:45:42,381 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 [2021-07-09 18:45:42,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:42,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:45:42,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:42,559 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:42,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466439853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:42,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:42,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-09 18:45:42,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598702110] [2021-07-09 18:45:42,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:45:42,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:42,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:45:42,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:45:42,560 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) [2021-07-09 18:45:43,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:43,845 INFO L93 Difference]: Finished difference Result 37754 states and 124912 transitions. [2021-07-09 18:45:43,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:45:43,845 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 [2021-07-09 18:45:43,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:43,939 INFO L225 Difference]: With dead ends: 37754 [2021-07-09 18:45:43,939 INFO L226 Difference]: Without dead ends: 37754 [2021-07-09 18:45:43,939 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1251 ImplicationChecksByTransitivity, 615.2ms TimeCoverageRelationStatistics Valid=910, Invalid=2996, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:45:43,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37754 states. [2021-07-09 18:45:44,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37754 to 17024. [2021-07-09 18:45:44,629 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) [2021-07-09 18:45:44,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17024 states to 17024 states and 59183 transitions. [2021-07-09 18:45:44,683 INFO L78 Accepts]: Start accepts. Automaton has 17024 states and 59183 transitions. Word has length 36 [2021-07-09 18:45:44,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:44,683 INFO L482 AbstractCegarLoop]: Abstraction has 17024 states and 59183 transitions. [2021-07-09 18:45:44,684 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) [2021-07-09 18:45:44,684 INFO L276 IsEmpty]: Start isEmpty. Operand 17024 states and 59183 transitions. [2021-07-09 18:45:44,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:45:44,714 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:44,714 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] [2021-07-09 18:45:44,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-07-09 18:45:44,914 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:44,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:44,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1447944180, now seen corresponding path program 116 times [2021-07-09 18:45:44,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:44,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640874540] [2021-07-09 18:45:44,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:44,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:45:44,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:44,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640874540] [2021-07-09 18:45:44,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640874540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:44,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086628586] [2021-07-09 18:45:44,974 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 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 [2021-07-09 18:45:45,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:45:45,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:45,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:45:45,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:45,186 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:45,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086628586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:45,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:45,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 18:45:45,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560782472] [2021-07-09 18:45:45,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:45:45,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:45,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:45:45,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:45:45,187 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) [2021-07-09 18:45:46,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:46,571 INFO L93 Difference]: Finished difference Result 37846 states and 125454 transitions. [2021-07-09 18:45:46,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 18:45:46,572 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 [2021-07-09 18:45:46,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:46,672 INFO L225 Difference]: With dead ends: 37846 [2021-07-09 18:45:46,672 INFO L226 Difference]: Without dead ends: 37846 [2021-07-09 18:45:46,673 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 649.8ms TimeCoverageRelationStatistics Valid=959, Invalid=3073, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:45:46,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37846 states. [2021-07-09 18:45:47,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37846 to 17016. [2021-07-09 18:45:47,288 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) [2021-07-09 18:45:47,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17016 states to 17016 states and 59191 transitions. [2021-07-09 18:45:47,333 INFO L78 Accepts]: Start accepts. Automaton has 17016 states and 59191 transitions. Word has length 36 [2021-07-09 18:45:47,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:47,333 INFO L482 AbstractCegarLoop]: Abstraction has 17016 states and 59191 transitions. [2021-07-09 18:45:47,333 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) [2021-07-09 18:45:47,333 INFO L276 IsEmpty]: Start isEmpty. Operand 17016 states and 59191 transitions. [2021-07-09 18:45:47,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:45:47,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:47,360 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] [2021-07-09 18:45:47,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-07-09 18:45:47,561 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:47,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:47,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1463404976, now seen corresponding path program 117 times [2021-07-09 18:45:47,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:47,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178115805] [2021-07-09 18:45:47,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:47,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:47,615 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:45:47,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:47,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178115805] [2021-07-09 18:45:47,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178115805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:47,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410941988] [2021-07-09 18:45:47,616 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 [2021-07-09 18:45:47,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:45:47,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:47,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:45:47,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:47,752 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 [2021-07-09 18:45:47,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:47,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:47,764 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. [2021-07-09 18:45:47,764 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-07-09 18:45:47,843 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-07-09 18:45:47,843 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 [2021-07-09 18:45:47,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:47,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:47,858 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. [2021-07-09 18:45:47,858 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:42 [2021-07-09 18:45:47,924 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-07-09 18:45:47,924 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 [2021-07-09 18:45:47,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:47,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:47,945 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. [2021-07-09 18:45:47,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:54 [2021-07-09 18:45:48,147 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 18:45:48,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410941988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:48,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:48,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-07-09 18:45:48,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540433921] [2021-07-09 18:45:48,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:45:48,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:48,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:45:48,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:45:48,148 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) [2021-07-09 18:45:51,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:51,798 INFO L93 Difference]: Finished difference Result 29934 states and 99159 transitions. [2021-07-09 18:45:51,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-07-09 18:45:51,798 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 [2021-07-09 18:45:51,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:51,880 INFO L225 Difference]: With dead ends: 29934 [2021-07-09 18:45:51,880 INFO L226 Difference]: Without dead ends: 29934 [2021-07-09 18:45:51,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3260 ImplicationChecksByTransitivity, 2530.2ms TimeCoverageRelationStatistics Valid=1800, Invalid=8300, Unknown=0, NotChecked=0, Total=10100 [2021-07-09 18:45:51,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29934 states. [2021-07-09 18:45:52,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29934 to 17104. [2021-07-09 18:45:52,324 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) [2021-07-09 18:45:52,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17104 states to 17104 states and 59588 transitions. [2021-07-09 18:45:52,371 INFO L78 Accepts]: Start accepts. Automaton has 17104 states and 59588 transitions. Word has length 36 [2021-07-09 18:45:52,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:52,371 INFO L482 AbstractCegarLoop]: Abstraction has 17104 states and 59588 transitions. [2021-07-09 18:45:52,371 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) [2021-07-09 18:45:52,371 INFO L276 IsEmpty]: Start isEmpty. Operand 17104 states and 59588 transitions. [2021-07-09 18:45:52,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:45:52,399 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:52,399 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] [2021-07-09 18:45:52,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:52,600 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:52,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:52,600 INFO L82 PathProgramCache]: Analyzing trace with hash -784175790, now seen corresponding path program 118 times [2021-07-09 18:45:52,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:52,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234171672] [2021-07-09 18:45:52,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:52,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:52,661 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:45:52,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:52,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234171672] [2021-07-09 18:45:52,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234171672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:52,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762645468] [2021-07-09 18:45:52,661 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 [2021-07-09 18:45:52,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:45:52,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:52,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:45:52,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:52,848 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:45:52,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762645468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:52,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:52,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 18:45:52,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644293312] [2021-07-09 18:45:52,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:45:52,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:52,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:45:52,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:45:52,849 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) [2021-07-09 18:45:55,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:55,842 INFO L93 Difference]: Finished difference Result 36789 states and 120419 transitions. [2021-07-09 18:45:55,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-07-09 18:45:55,842 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 [2021-07-09 18:45:55,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:55,929 INFO L225 Difference]: With dead ends: 36789 [2021-07-09 18:45:55,929 INFO L226 Difference]: Without dead ends: 36789 [2021-07-09 18:45:55,930 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7472 ImplicationChecksByTransitivity, 1888.1ms TimeCoverageRelationStatistics Valid=3298, Invalid=15608, Unknown=0, NotChecked=0, Total=18906 [2021-07-09 18:45:55,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36789 states. [2021-07-09 18:45:56,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36789 to 17371. [2021-07-09 18:45:56,415 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) [2021-07-09 18:45:56,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17371 states to 17371 states and 60485 transitions. [2021-07-09 18:45:56,464 INFO L78 Accepts]: Start accepts. Automaton has 17371 states and 60485 transitions. Word has length 36 [2021-07-09 18:45:56,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:56,464 INFO L482 AbstractCegarLoop]: Abstraction has 17371 states and 60485 transitions. [2021-07-09 18:45:56,464 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) [2021-07-09 18:45:56,464 INFO L276 IsEmpty]: Start isEmpty. Operand 17371 states and 60485 transitions. [2021-07-09 18:45:56,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:45:56,632 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:56,632 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] [2021-07-09 18:45:56,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-07-09 18:45:56,833 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:56,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:56,833 INFO L82 PathProgramCache]: Analyzing trace with hash -265224148, now seen corresponding path program 119 times [2021-07-09 18:45:56,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:56,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094188601] [2021-07-09 18:45:56,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:56,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:56,889 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:56,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:56,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094188601] [2021-07-09 18:45:56,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094188601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:56,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597946130] [2021-07-09 18:45:56,889 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 [2021-07-09 18:45:56,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:45:56,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:56,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:45:56,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:57,033 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:57,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597946130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:57,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:57,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-09 18:45:57,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529643555] [2021-07-09 18:45:57,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:45:57,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:57,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:45:57,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:45:57,034 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) [2021-07-09 18:45:58,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:58,879 INFO L93 Difference]: Finished difference Result 34245 states and 114443 transitions. [2021-07-09 18:45:58,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-07-09 18:45:58,879 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 [2021-07-09 18:45:58,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:58,964 INFO L225 Difference]: With dead ends: 34245 [2021-07-09 18:45:58,964 INFO L226 Difference]: Without dead ends: 34173 [2021-07-09 18:45:58,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3600 ImplicationChecksByTransitivity, 1146.1ms TimeCoverageRelationStatistics Valid=2064, Invalid=7836, Unknown=0, NotChecked=0, Total=9900 [2021-07-09 18:45:58,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34173 states. [2021-07-09 18:45:59,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34173 to 16919. [2021-07-09 18:45:59,440 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) [2021-07-09 18:45:59,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16919 states to 16919 states and 58903 transitions. [2021-07-09 18:45:59,481 INFO L78 Accepts]: Start accepts. Automaton has 16919 states and 58903 transitions. Word has length 36 [2021-07-09 18:45:59,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:59,481 INFO L482 AbstractCegarLoop]: Abstraction has 16919 states and 58903 transitions. [2021-07-09 18:45:59,481 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) [2021-07-09 18:45:59,481 INFO L276 IsEmpty]: Start isEmpty. Operand 16919 states and 58903 transitions. [2021-07-09 18:45:59,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:45:59,510 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:59,510 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] [2021-07-09 18:45:59,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-07-09 18:45:59,710 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:59,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:59,711 INFO L82 PathProgramCache]: Analyzing trace with hash -907070356, now seen corresponding path program 120 times [2021-07-09 18:45:59,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:59,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871406532] [2021-07-09 18:45:59,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:59,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:59,774 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:59,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:59,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871406532] [2021-07-09 18:45:59,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871406532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:59,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781069146] [2021-07-09 18:45:59,774 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 [2021-07-09 18:45:59,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:45:59,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:59,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:45:59,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:59,920 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:45:59,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781069146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:59,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:59,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-09 18:45:59,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454559851] [2021-07-09 18:45:59,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:45:59,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:59,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:45:59,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:45:59,921 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) [2021-07-09 18:46:00,378 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-07-09 18:46:02,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:02,129 INFO L93 Difference]: Finished difference Result 34016 states and 113681 transitions. [2021-07-09 18:46:02,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-07-09 18:46:02,129 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 [2021-07-09 18:46:02,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:02,216 INFO L225 Difference]: With dead ends: 34016 [2021-07-09 18:46:02,216 INFO L226 Difference]: Without dead ends: 33956 [2021-07-09 18:46:02,216 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4457 ImplicationChecksByTransitivity, 1343.4ms TimeCoverageRelationStatistics Valid=2358, Invalid=9852, Unknown=0, NotChecked=0, Total=12210 [2021-07-09 18:46:02,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33956 states. [2021-07-09 18:46:02,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33956 to 16875. [2021-07-09 18:46:02,701 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) [2021-07-09 18:46:02,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16875 states to 16875 states and 58783 transitions. [2021-07-09 18:46:02,744 INFO L78 Accepts]: Start accepts. Automaton has 16875 states and 58783 transitions. Word has length 36 [2021-07-09 18:46:02,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:02,744 INFO L482 AbstractCegarLoop]: Abstraction has 16875 states and 58783 transitions. [2021-07-09 18:46:02,744 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) [2021-07-09 18:46:02,745 INFO L276 IsEmpty]: Start isEmpty. Operand 16875 states and 58783 transitions. [2021-07-09 18:46:02,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:46:02,771 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:02,771 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] [2021-07-09 18:46:02,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:02,972 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:02,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:02,972 INFO L82 PathProgramCache]: Analyzing trace with hash -719103608, now seen corresponding path program 121 times [2021-07-09 18:46:02,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:02,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82029989] [2021-07-09 18:46:02,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:02,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:03,030 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:03,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:03,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82029989] [2021-07-09 18:46:03,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82029989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:03,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501395857] [2021-07-09 18:46:03,031 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 [2021-07-09 18:46:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:03,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:46:03,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:46:03,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501395857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:03,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:03,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 18:46:03,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167664104] [2021-07-09 18:46:03,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:46:03,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:03,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:46:03,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:46:03,210 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) [2021-07-09 18:46:04,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:04,481 INFO L93 Difference]: Finished difference Result 38582 states and 129677 transitions. [2021-07-09 18:46:04,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 18:46:04,482 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 [2021-07-09 18:46:04,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:04,585 INFO L225 Difference]: With dead ends: 38582 [2021-07-09 18:46:04,585 INFO L226 Difference]: Without dead ends: 38582 [2021-07-09 18:46:04,585 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 624.8ms TimeCoverageRelationStatistics Valid=922, Invalid=3110, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:46:04,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38582 states. [2021-07-09 18:46:05,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38582 to 17496. [2021-07-09 18:46:05,202 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) [2021-07-09 18:46:05,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17496 states to 17496 states and 61422 transitions. [2021-07-09 18:46:05,246 INFO L78 Accepts]: Start accepts. Automaton has 17496 states and 61422 transitions. Word has length 36 [2021-07-09 18:46:05,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:05,247 INFO L482 AbstractCegarLoop]: Abstraction has 17496 states and 61422 transitions. [2021-07-09 18:46:05,247 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) [2021-07-09 18:46:05,247 INFO L276 IsEmpty]: Start isEmpty. Operand 17496 states and 61422 transitions. [2021-07-09 18:46:05,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:46:05,275 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:05,275 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] [2021-07-09 18:46:05,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:05,475 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:05,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:05,475 INFO L82 PathProgramCache]: Analyzing trace with hash -703642812, now seen corresponding path program 122 times [2021-07-09 18:46:05,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:05,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40370293] [2021-07-09 18:46:05,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:05,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:05,534 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:05,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:05,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40370293] [2021-07-09 18:46:05,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40370293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:05,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699592339] [2021-07-09 18:46:05,534 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 [2021-07-09 18:46:05,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:46:05,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:05,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:46:05,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:05,712 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:46:05,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699592339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:05,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:05,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 18:46:05,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108492849] [2021-07-09 18:46:05,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:46:05,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:05,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:46:05,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:46:05,713 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) [2021-07-09 18:46:07,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:07,168 INFO L93 Difference]: Finished difference Result 39068 states and 130518 transitions. [2021-07-09 18:46:07,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 18:46:07,169 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 [2021-07-09 18:46:07,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:07,269 INFO L225 Difference]: With dead ends: 39068 [2021-07-09 18:46:07,269 INFO L226 Difference]: Without dead ends: 39068 [2021-07-09 18:46:07,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 830.5ms TimeCoverageRelationStatistics Valid=1170, Invalid=3660, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:46:07,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39068 states. [2021-07-09 18:46:07,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39068 to 17040. [2021-07-09 18:46:07,903 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) [2021-07-09 18:46:07,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17040 states to 17040 states and 59517 transitions. [2021-07-09 18:46:07,948 INFO L78 Accepts]: Start accepts. Automaton has 17040 states and 59517 transitions. Word has length 36 [2021-07-09 18:46:07,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:07,948 INFO L482 AbstractCegarLoop]: Abstraction has 17040 states and 59517 transitions. [2021-07-09 18:46:07,948 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) [2021-07-09 18:46:07,948 INFO L276 IsEmpty]: Start isEmpty. Operand 17040 states and 59517 transitions. [2021-07-09 18:46:07,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:46:07,976 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:07,976 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] [2021-07-09 18:46:08,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:08,176 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:08,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:08,177 INFO L82 PathProgramCache]: Analyzing trace with hash 444490688, now seen corresponding path program 123 times [2021-07-09 18:46:08,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:08,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319111005] [2021-07-09 18:46:08,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:08,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:08,235 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:08,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:08,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319111005] [2021-07-09 18:46:08,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319111005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:08,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264241902] [2021-07-09 18:46:08,235 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 [2021-07-09 18:46:08,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:46:08,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:08,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:46:08,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:08,405 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:46:08,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264241902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:08,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:08,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 18:46:08,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39774716] [2021-07-09 18:46:08,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:46:08,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:08,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:46:08,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:46:08,406 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) [2021-07-09 18:46:09,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:09,562 INFO L93 Difference]: Finished difference Result 35719 states and 119509 transitions. [2021-07-09 18:46:09,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:46:09,562 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 [2021-07-09 18:46:09,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:09,653 INFO L225 Difference]: With dead ends: 35719 [2021-07-09 18:46:09,653 INFO L226 Difference]: Without dead ends: 35719 [2021-07-09 18:46:09,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 509.9ms TimeCoverageRelationStatistics Valid=703, Invalid=2377, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:46:09,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35719 states. [2021-07-09 18:46:10,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35719 to 16855. [2021-07-09 18:46:10,250 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) [2021-07-09 18:46:10,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16855 states to 16855 states and 58714 transitions. [2021-07-09 18:46:10,295 INFO L78 Accepts]: Start accepts. Automaton has 16855 states and 58714 transitions. Word has length 36 [2021-07-09 18:46:10,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:10,295 INFO L482 AbstractCegarLoop]: Abstraction has 16855 states and 58714 transitions. [2021-07-09 18:46:10,295 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) [2021-07-09 18:46:10,295 INFO L276 IsEmpty]: Start isEmpty. Operand 16855 states and 58714 transitions. [2021-07-09 18:46:10,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:46:10,322 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:10,323 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] [2021-07-09 18:46:10,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:10,523 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:10,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:10,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1078249612, now seen corresponding path program 124 times [2021-07-09 18:46:10,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:10,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689717442] [2021-07-09 18:46:10,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:10,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:10,575 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:10,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:10,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689717442] [2021-07-09 18:46:10,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689717442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:10,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989895031] [2021-07-09 18:46:10,576 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 [2021-07-09 18:46:10,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:46:10,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:10,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:46:10,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:10,741 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:46:10,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989895031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:10,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:10,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 18:46:10,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498128371] [2021-07-09 18:46:10,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:10,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:10,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:10,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:10,742 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) [2021-07-09 18:46:11,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:11,690 INFO L93 Difference]: Finished difference Result 34570 states and 115444 transitions. [2021-07-09 18:46:11,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:46:11,690 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 [2021-07-09 18:46:11,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:11,791 INFO L225 Difference]: With dead ends: 34570 [2021-07-09 18:46:11,791 INFO L226 Difference]: Without dead ends: 34570 [2021-07-09 18:46:11,792 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 431.5ms TimeCoverageRelationStatistics Valid=555, Invalid=1797, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:46:11,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34570 states. [2021-07-09 18:46:12,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34570 to 16873. [2021-07-09 18:46:12,413 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) [2021-07-09 18:46:12,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16873 states to 16873 states and 58773 transitions. [2021-07-09 18:46:12,458 INFO L78 Accepts]: Start accepts. Automaton has 16873 states and 58773 transitions. Word has length 36 [2021-07-09 18:46:12,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:12,458 INFO L482 AbstractCegarLoop]: Abstraction has 16873 states and 58773 transitions. [2021-07-09 18:46:12,458 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) [2021-07-09 18:46:12,458 INFO L276 IsEmpty]: Start isEmpty. Operand 16873 states and 58773 transitions. [2021-07-09 18:46:12,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:46:12,485 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:12,485 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] [2021-07-09 18:46:12,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-07-09 18:46:12,686 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:12,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:12,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1249008814, now seen corresponding path program 125 times [2021-07-09 18:46:12,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:12,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982514790] [2021-07-09 18:46:12,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:12,747 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:12,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:12,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982514790] [2021-07-09 18:46:12,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982514790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:12,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907617317] [2021-07-09 18:46:12,747 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 [2021-07-09 18:46:12,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:46:12,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:12,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:46:12,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:12,913 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:46:12,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907617317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:12,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:12,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-07-09 18:46:12,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408611866] [2021-07-09 18:46:12,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:46:12,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:12,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:46:12,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:46:12,914 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) [2021-07-09 18:46:15,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:15,134 INFO L93 Difference]: Finished difference Result 36187 states and 119134 transitions. [2021-07-09 18:46:15,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-07-09 18:46:15,134 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 [2021-07-09 18:46:15,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:15,228 INFO L225 Difference]: With dead ends: 36187 [2021-07-09 18:46:15,228 INFO L226 Difference]: Without dead ends: 36183 [2021-07-09 18:46:15,229 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4706 ImplicationChecksByTransitivity, 1323.4ms TimeCoverageRelationStatistics Valid=2270, Invalid=10612, Unknown=0, NotChecked=0, Total=12882 [2021-07-09 18:46:15,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36183 states. [2021-07-09 18:46:15,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36183 to 17057. [2021-07-09 18:46:15,832 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) [2021-07-09 18:46:15,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17057 states to 17057 states and 59365 transitions. [2021-07-09 18:46:15,875 INFO L78 Accepts]: Start accepts. Automaton has 17057 states and 59365 transitions. Word has length 36 [2021-07-09 18:46:15,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:15,875 INFO L482 AbstractCegarLoop]: Abstraction has 17057 states and 59365 transitions. [2021-07-09 18:46:15,875 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) [2021-07-09 18:46:15,875 INFO L276 IsEmpty]: Start isEmpty. Operand 17057 states and 59365 transitions. [2021-07-09 18:46:15,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:46:15,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:15,902 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] [2021-07-09 18:46:16,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:16,103 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:16,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:16,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1793730568, now seen corresponding path program 126 times [2021-07-09 18:46:16,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:16,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862083154] [2021-07-09 18:46:16,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:16,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:16,153 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:16,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:16,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862083154] [2021-07-09 18:46:16,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862083154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:16,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550882131] [2021-07-09 18:46:16,154 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 [2021-07-09 18:46:16,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:46:16,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:16,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:46:16,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:16,305 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:46:16,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550882131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:16,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:16,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-07-09 18:46:16,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413152573] [2021-07-09 18:46:16,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:16,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:16,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:16,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:16,306 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) [2021-07-09 18:46:17,870 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-07-09 18:46:18,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:18,729 INFO L93 Difference]: Finished difference Result 38126 states and 127134 transitions. [2021-07-09 18:46:18,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-07-09 18:46:18,729 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 [2021-07-09 18:46:18,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:18,828 INFO L225 Difference]: With dead ends: 38126 [2021-07-09 18:46:18,829 INFO L226 Difference]: Without dead ends: 38126 [2021-07-09 18:46:18,830 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5730 ImplicationChecksByTransitivity, 1555.9ms TimeCoverageRelationStatistics Valid=2664, Invalid=11856, Unknown=0, NotChecked=0, Total=14520 [2021-07-09 18:46:18,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38126 states. [2021-07-09 18:46:19,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38126 to 17565. [2021-07-09 18:46:19,458 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) [2021-07-09 18:46:19,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17565 states to 17565 states and 61454 transitions. [2021-07-09 18:46:19,506 INFO L78 Accepts]: Start accepts. Automaton has 17565 states and 61454 transitions. Word has length 36 [2021-07-09 18:46:19,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:19,506 INFO L482 AbstractCegarLoop]: Abstraction has 17565 states and 61454 transitions. [2021-07-09 18:46:19,507 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) [2021-07-09 18:46:19,507 INFO L276 IsEmpty]: Start isEmpty. Operand 17565 states and 61454 transitions. [2021-07-09 18:46:19,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:46:19,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:19,536 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] [2021-07-09 18:46:19,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-07-09 18:46:19,736 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:19,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:19,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1809191364, now seen corresponding path program 127 times [2021-07-09 18:46:19,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:19,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920295130] [2021-07-09 18:46:19,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:19,787 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:19,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:19,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920295130] [2021-07-09 18:46:19,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920295130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:19,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470463309] [2021-07-09 18:46:19,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:46:19,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:19,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:46:19,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:19,951 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:46:19,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470463309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:19,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:19,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-07-09 18:46:19,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157363768] [2021-07-09 18:46:19,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:19,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:19,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:19,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:19,952 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) [2021-07-09 18:46:21,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:21,059 INFO L93 Difference]: Finished difference Result 35670 states and 119988 transitions. [2021-07-09 18:46:21,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:46:21,060 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 [2021-07-09 18:46:21,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:21,148 INFO L225 Difference]: With dead ends: 35670 [2021-07-09 18:46:21,149 INFO L226 Difference]: Without dead ends: 35670 [2021-07-09 18:46:21,149 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 482.8ms TimeCoverageRelationStatistics Valid=748, Invalid=2222, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:46:21,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35670 states. [2021-07-09 18:46:21,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35670 to 17384. [2021-07-09 18:46:21,651 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) [2021-07-09 18:46:21,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17384 states to 17384 states and 60688 transitions. [2021-07-09 18:46:21,697 INFO L78 Accepts]: Start accepts. Automaton has 17384 states and 60688 transitions. Word has length 36 [2021-07-09 18:46:21,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:21,697 INFO L482 AbstractCegarLoop]: Abstraction has 17384 states and 60688 transitions. [2021-07-09 18:46:21,697 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) [2021-07-09 18:46:21,697 INFO L276 IsEmpty]: Start isEmpty. Operand 17384 states and 60688 transitions. [2021-07-09 18:46:21,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:46:21,725 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:21,725 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] [2021-07-09 18:46:21,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-07-09 18:46:21,926 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:21,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:21,926 INFO L82 PathProgramCache]: Analyzing trace with hash -530582264, now seen corresponding path program 128 times [2021-07-09 18:46:21,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:21,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951122358] [2021-07-09 18:46:21,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:21,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:22,116 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:22,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:22,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951122358] [2021-07-09 18:46:22,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951122358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:22,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763839142] [2021-07-09 18:46:22,117 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 [2021-07-09 18:46:22,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:46:22,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:22,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:46:22,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:46:22,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763839142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:22,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:22,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-07-09 18:46:22,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972363965] [2021-07-09 18:46:22,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:46:22,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:22,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:46:22,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:46:22,297 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) [2021-07-09 18:46:25,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:25,764 INFO L93 Difference]: Finished difference Result 54535 states and 178905 transitions. [2021-07-09 18:46:25,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-07-09 18:46:25,765 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 [2021-07-09 18:46:25,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:25,921 INFO L225 Difference]: With dead ends: 54535 [2021-07-09 18:46:25,921 INFO L226 Difference]: Without dead ends: 54535 [2021-07-09 18:46:25,923 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12884 ImplicationChecksByTransitivity, 2669.8ms TimeCoverageRelationStatistics Valid=5153, Invalid=24603, Unknown=0, NotChecked=0, Total=29756 [2021-07-09 18:46:25,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54535 states. [2021-07-09 18:46:26,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54535 to 23450. [2021-07-09 18:46:26,793 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) [2021-07-09 18:46:26,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23450 states to 23450 states and 81923 transitions. [2021-07-09 18:46:26,852 INFO L78 Accepts]: Start accepts. Automaton has 23450 states and 81923 transitions. Word has length 36 [2021-07-09 18:46:26,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:26,852 INFO L482 AbstractCegarLoop]: Abstraction has 23450 states and 81923 transitions. [2021-07-09 18:46:26,852 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) [2021-07-09 18:46:26,852 INFO L276 IsEmpty]: Start isEmpty. Operand 23450 states and 81923 transitions. [2021-07-09 18:46:26,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:46:26,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:26,887 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] [2021-07-09 18:46:27,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-07-09 18:46:27,089 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:27,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:27,089 INFO L82 PathProgramCache]: Analyzing trace with hash 2079713946, now seen corresponding path program 129 times [2021-07-09 18:46:27,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:27,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295842955] [2021-07-09 18:46:27,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:27,151 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:27,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:27,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295842955] [2021-07-09 18:46:27,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295842955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:27,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436403584] [2021-07-09 18:46:27,151 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 [2021-07-09 18:46:27,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:46:27,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:27,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:46:27,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:27,319 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 [2021-07-09 18:46:27,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:27,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:27,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:46:27,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-09 18:46:27,379 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-07-09 18:46:27,379 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 [2021-07-09 18:46:27,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:27,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:27,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:46:27,387 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-07-09 18:46:27,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:46:27,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:46:27,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:46:27,442 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 [2021-07-09 18:46:27,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:27,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:27,457 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. [2021-07-09 18:46:27,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-07-09 18:46:27,552 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:46:27,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436403584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:27,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:27,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-07-09 18:46:27,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971007062] [2021-07-09 18:46:27,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:46:27,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:27,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:46:27,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:46:27,553 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) [2021-07-09 18:46:27,840 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-07-09 18:46:30,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:30,897 INFO L93 Difference]: Finished difference Result 43833 states and 145969 transitions. [2021-07-09 18:46:30,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-07-09 18:46:30,898 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 [2021-07-09 18:46:30,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:31,022 INFO L225 Difference]: With dead ends: 43833 [2021-07-09 18:46:31,022 INFO L226 Difference]: Without dead ends: 43801 [2021-07-09 18:46:31,023 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6349 ImplicationChecksByTransitivity, 2603.0ms TimeCoverageRelationStatistics Valid=2492, Invalid=14278, Unknown=0, NotChecked=0, Total=16770 [2021-07-09 18:46:31,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43801 states. [2021-07-09 18:46:31,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43801 to 24220. [2021-07-09 18:46:31,756 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) [2021-07-09 18:46:31,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24220 states to 24220 states and 84662 transitions. [2021-07-09 18:46:31,821 INFO L78 Accepts]: Start accepts. Automaton has 24220 states and 84662 transitions. Word has length 36 [2021-07-09 18:46:31,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:31,821 INFO L482 AbstractCegarLoop]: Abstraction has 24220 states and 84662 transitions. [2021-07-09 18:46:31,821 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) [2021-07-09 18:46:31,821 INFO L276 IsEmpty]: Start isEmpty. Operand 24220 states and 84662 transitions. [2021-07-09 18:46:31,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:46:31,859 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:31,859 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] [2021-07-09 18:46:32,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:32,060 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:32,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:32,060 INFO L82 PathProgramCache]: Analyzing trace with hash -408762388, now seen corresponding path program 130 times [2021-07-09 18:46:32,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:32,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507062494] [2021-07-09 18:46:32,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:32,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:32,105 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:32,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:32,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507062494] [2021-07-09 18:46:32,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507062494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:32,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403859986] [2021-07-09 18:46:32,106 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 [2021-07-09 18:46:32,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:46:32,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:32,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:46:32,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:32,319 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:46:32,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403859986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:32,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:32,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 18:46:32,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031965830] [2021-07-09 18:46:32,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:46:32,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:32,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:46:32,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:46:32,321 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) [2021-07-09 18:46:34,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:34,916 INFO L93 Difference]: Finished difference Result 58769 states and 199442 transitions. [2021-07-09 18:46:34,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-07-09 18:46:34,916 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 [2021-07-09 18:46:34,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:35,094 INFO L225 Difference]: With dead ends: 58769 [2021-07-09 18:46:35,094 INFO L226 Difference]: Without dead ends: 58705 [2021-07-09 18:46:35,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6795 ImplicationChecksByTransitivity, 1621.7ms TimeCoverageRelationStatistics Valid=2796, Invalid=13716, Unknown=0, NotChecked=0, Total=16512 [2021-07-09 18:46:35,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58705 states. [2021-07-09 18:46:36,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58705 to 25245. [2021-07-09 18:46:36,243 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) [2021-07-09 18:46:36,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25245 states to 25245 states and 88799 transitions. [2021-07-09 18:46:36,312 INFO L78 Accepts]: Start accepts. Automaton has 25245 states and 88799 transitions. Word has length 36 [2021-07-09 18:46:36,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:36,312 INFO L482 AbstractCegarLoop]: Abstraction has 25245 states and 88799 transitions. [2021-07-09 18:46:36,312 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) [2021-07-09 18:46:36,312 INFO L276 IsEmpty]: Start isEmpty. Operand 25245 states and 88799 transitions. [2021-07-09 18:46:36,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:46:36,351 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:36,351 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] [2021-07-09 18:46:36,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-07-09 18:46:36,552 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:36,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:36,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1347426568, now seen corresponding path program 131 times [2021-07-09 18:46:36,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:36,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416413395] [2021-07-09 18:46:36,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:36,607 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:36,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:36,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416413395] [2021-07-09 18:46:36,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416413395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:36,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633357178] [2021-07-09 18:46:36,607 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 [2021-07-09 18:46:36,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:46:36,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:36,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:46:36,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:36,802 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:36,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633357178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:36,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:36,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-07-09 18:46:36,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626823141] [2021-07-09 18:46:36,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:46:36,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:36,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:46:36,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:46:36,803 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) [2021-07-09 18:46:37,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:37,656 INFO L93 Difference]: Finished difference Result 57930 states and 199300 transitions. [2021-07-09 18:46:37,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:46:37,657 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 [2021-07-09 18:46:37,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:37,839 INFO L225 Difference]: With dead ends: 57930 [2021-07-09 18:46:37,840 INFO L226 Difference]: Without dead ends: 57930 [2021-07-09 18:46:37,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 326.5ms TimeCoverageRelationStatistics Valid=401, Invalid=1081, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:46:38,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57930 states. [2021-07-09 18:46:39,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57930 to 26000. [2021-07-09 18:46:39,238 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) [2021-07-09 18:46:39,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26000 states to 26000 states and 91958 transitions. [2021-07-09 18:46:39,312 INFO L78 Accepts]: Start accepts. Automaton has 26000 states and 91958 transitions. Word has length 36 [2021-07-09 18:46:39,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:39,312 INFO L482 AbstractCegarLoop]: Abstraction has 26000 states and 91958 transitions. [2021-07-09 18:46:39,313 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) [2021-07-09 18:46:39,313 INFO L276 IsEmpty]: Start isEmpty. Operand 26000 states and 91958 transitions. [2021-07-09 18:46:39,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:46:39,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:39,353 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] [2021-07-09 18:46:39,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:39,554 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:39,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:39,555 INFO L82 PathProgramCache]: Analyzing trace with hash 339853380, now seen corresponding path program 132 times [2021-07-09 18:46:39,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:39,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13457137] [2021-07-09 18:46:39,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:39,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:39,602 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:39,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:39,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13457137] [2021-07-09 18:46:39,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13457137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:39,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109280570] [2021-07-09 18:46:39,602 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 [2021-07-09 18:46:39,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:46:39,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:39,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:46:39,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:39,783 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:46:39,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109280570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:39,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:39,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 18:46:39,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971478037] [2021-07-09 18:46:39,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:46:39,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:39,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:46:39,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:46:39,784 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) [2021-07-09 18:46:40,130 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 12 [2021-07-09 18:46:42,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:42,394 INFO L93 Difference]: Finished difference Result 60488 states and 206164 transitions. [2021-07-09 18:46:42,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-07-09 18:46:42,395 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 [2021-07-09 18:46:42,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:42,580 INFO L225 Difference]: With dead ends: 60488 [2021-07-09 18:46:42,580 INFO L226 Difference]: Without dead ends: 60488 [2021-07-09 18:46:42,581 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6645 ImplicationChecksByTransitivity, 1763.3ms TimeCoverageRelationStatistics Valid=3256, Invalid=12746, Unknown=0, NotChecked=0, Total=16002 [2021-07-09 18:46:42,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60488 states. [2021-07-09 18:46:43,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60488 to 26680. [2021-07-09 18:46:43,782 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) [2021-07-09 18:46:43,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26680 states to 26680 states and 95142 transitions. [2021-07-09 18:46:43,857 INFO L78 Accepts]: Start accepts. Automaton has 26680 states and 95142 transitions. Word has length 36 [2021-07-09 18:46:43,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:43,857 INFO L482 AbstractCegarLoop]: Abstraction has 26680 states and 95142 transitions. [2021-07-09 18:46:43,857 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) [2021-07-09 18:46:43,857 INFO L276 IsEmpty]: Start isEmpty. Operand 26680 states and 95142 transitions. [2021-07-09 18:46:43,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:46:43,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:43,903 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] [2021-07-09 18:46:44,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:44,104 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:44,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:44,104 INFO L82 PathProgramCache]: Analyzing trace with hash -710764454, now seen corresponding path program 133 times [2021-07-09 18:46:44,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:44,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656040270] [2021-07-09 18:46:44,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:44,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:44,151 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:44,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:44,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656040270] [2021-07-09 18:46:44,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656040270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:44,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039280012] [2021-07-09 18:46:44,151 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 [2021-07-09 18:46:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:44,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:46:44,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:44,301 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:46:44,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039280012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:44,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:44,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-09 18:46:44,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562967845] [2021-07-09 18:46:44,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:46:44,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:44,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:46:44,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:46:44,302 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) [2021-07-09 18:46:44,870 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-07-09 18:46:45,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:45,987 INFO L93 Difference]: Finished difference Result 57569 states and 197823 transitions. [2021-07-09 18:46:45,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-07-09 18:46:45,987 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 [2021-07-09 18:46:45,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:46,163 INFO L225 Difference]: With dead ends: 57569 [2021-07-09 18:46:46,164 INFO L226 Difference]: Without dead ends: 57521 [2021-07-09 18:46:46,164 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2543 ImplicationChecksByTransitivity, 939.5ms TimeCoverageRelationStatistics Valid=1427, Invalid=5379, Unknown=0, NotChecked=0, Total=6806 [2021-07-09 18:46:46,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57521 states. [2021-07-09 18:46:47,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57521 to 26690. [2021-07-09 18:46:47,220 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) [2021-07-09 18:46:47,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26690 states to 26690 states and 95173 transitions. [2021-07-09 18:46:47,300 INFO L78 Accepts]: Start accepts. Automaton has 26690 states and 95173 transitions. Word has length 36 [2021-07-09 18:46:47,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:47,300 INFO L482 AbstractCegarLoop]: Abstraction has 26690 states and 95173 transitions. [2021-07-09 18:46:47,300 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) [2021-07-09 18:46:47,300 INFO L276 IsEmpty]: Start isEmpty. Operand 26690 states and 95173 transitions. [2021-07-09 18:46:47,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:46:47,347 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:47,347 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] [2021-07-09 18:46:47,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2021-07-09 18:46:47,548 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:47,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:47,548 INFO L82 PathProgramCache]: Analyzing trace with hash 329516758, now seen corresponding path program 134 times [2021-07-09 18:46:47,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:47,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045145760] [2021-07-09 18:46:47,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:47,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:47,730 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:47,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:47,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045145760] [2021-07-09 18:46:47,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045145760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:47,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515159982] [2021-07-09 18:46:47,731 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 [2021-07-09 18:46:47,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:46:47,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:47,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:46:47,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:47,923 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:47,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515159982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:47,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:47,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-07-09 18:46:47,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253500663] [2021-07-09 18:46:47,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:46:47,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:47,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:46:47,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:46:47,924 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) [2021-07-09 18:46:48,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:48,921 INFO L93 Difference]: Finished difference Result 57984 states and 198618 transitions. [2021-07-09 18:46:48,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:46:48,921 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 [2021-07-09 18:46:48,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:49,102 INFO L225 Difference]: With dead ends: 57984 [2021-07-09 18:46:49,102 INFO L226 Difference]: Without dead ends: 57984 [2021-07-09 18:46:49,102 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 494.8ms TimeCoverageRelationStatistics Valid=474, Invalid=1248, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:46:49,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57984 states. [2021-07-09 18:46:50,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57984 to 27762. [2021-07-09 18:46:50,200 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) [2021-07-09 18:46:50,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27762 states to 27762 states and 99799 transitions. [2021-07-09 18:46:50,404 INFO L78 Accepts]: Start accepts. Automaton has 27762 states and 99799 transitions. Word has length 36 [2021-07-09 18:46:50,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:50,404 INFO L482 AbstractCegarLoop]: Abstraction has 27762 states and 99799 transitions. [2021-07-09 18:46:50,404 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) [2021-07-09 18:46:50,404 INFO L276 IsEmpty]: Start isEmpty. Operand 27762 states and 99799 transitions. [2021-07-09 18:46:50,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:46:50,469 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:50,469 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] [2021-07-09 18:46:50,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:50,670 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:50,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:50,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1122382768, now seen corresponding path program 135 times [2021-07-09 18:46:50,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:50,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61980297] [2021-07-09 18:46:50,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:50,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:50,721 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:46:50,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:50,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61980297] [2021-07-09 18:46:50,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61980297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:50,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869717965] [2021-07-09 18:46:50,722 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 [2021-07-09 18:46:50,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:46:50,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:50,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:46:50,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:50,875 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:50,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869717965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:50,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:50,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 18 [2021-07-09 18:46:50,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651564608] [2021-07-09 18:46:50,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:46:50,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:50,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:46:50,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:46:50,876 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) [2021-07-09 18:46:52,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:52,134 INFO L93 Difference]: Finished difference Result 54138 states and 184921 transitions. [2021-07-09 18:46:52,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 18:46:52,135 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 [2021-07-09 18:46:52,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:52,299 INFO L225 Difference]: With dead ends: 54138 [2021-07-09 18:46:52,299 INFO L226 Difference]: Without dead ends: 54066 [2021-07-09 18:46:52,300 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 616.1ms TimeCoverageRelationStatistics Valid=855, Invalid=3435, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:46:52,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54066 states. [2021-07-09 18:46:53,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54066 to 27784. [2021-07-09 18:46:53,338 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) [2021-07-09 18:46:53,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27784 states to 27784 states and 99862 transitions. [2021-07-09 18:46:53,413 INFO L78 Accepts]: Start accepts. Automaton has 27784 states and 99862 transitions. Word has length 36 [2021-07-09 18:46:53,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:53,413 INFO L482 AbstractCegarLoop]: Abstraction has 27784 states and 99862 transitions. [2021-07-09 18:46:53,413 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) [2021-07-09 18:46:53,413 INFO L276 IsEmpty]: Start isEmpty. Operand 27784 states and 99862 transitions. [2021-07-09 18:46:53,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:46:53,457 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:53,457 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] [2021-07-09 18:46:53,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:53,658 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:53,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:53,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1700283596, now seen corresponding path program 136 times [2021-07-09 18:46:53,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:53,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683609918] [2021-07-09 18:46:53,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:53,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:53,852 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-07-09 18:46:53,867 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:46:53,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:53,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683609918] [2021-07-09 18:46:53,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683609918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:53,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994153302] [2021-07-09 18:46:53,868 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 [2021-07-09 18:46:53,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:46:53,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:53,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:46:53,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:54,041 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:46:54,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994153302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:54,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:54,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-09 18:46:54,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769133536] [2021-07-09 18:46:54,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:46:54,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:54,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:46:54,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:46:54,042 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) [2021-07-09 18:46:56,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:56,286 INFO L93 Difference]: Finished difference Result 59804 states and 200815 transitions. [2021-07-09 18:46:56,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-07-09 18:46:56,286 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 [2021-07-09 18:46:56,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:56,476 INFO L225 Difference]: With dead ends: 59804 [2021-07-09 18:46:56,476 INFO L226 Difference]: Without dead ends: 59804 [2021-07-09 18:46:56,477 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5826 ImplicationChecksByTransitivity, 1421.0ms TimeCoverageRelationStatistics Valid=2466, Invalid=11576, Unknown=0, NotChecked=0, Total=14042 [2021-07-09 18:46:56,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59804 states. [2021-07-09 18:46:57,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59804 to 27938. [2021-07-09 18:46:57,574 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) [2021-07-09 18:46:57,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27938 states to 27938 states and 100323 transitions. [2021-07-09 18:46:57,667 INFO L78 Accepts]: Start accepts. Automaton has 27938 states and 100323 transitions. Word has length 36 [2021-07-09 18:46:57,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:57,668 INFO L482 AbstractCegarLoop]: Abstraction has 27938 states and 100323 transitions. [2021-07-09 18:46:57,668 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) [2021-07-09 18:46:57,668 INFO L276 IsEmpty]: Start isEmpty. Operand 27938 states and 100323 transitions. [2021-07-09 18:46:57,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:46:57,720 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:57,720 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] [2021-07-09 18:46:57,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-07-09 18:46:57,920 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:57,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:57,920 INFO L82 PathProgramCache]: Analyzing trace with hash -2038937164, now seen corresponding path program 137 times [2021-07-09 18:46:57,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:57,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587881066] [2021-07-09 18:46:57,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:57,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:57,987 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:57,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:57,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587881066] [2021-07-09 18:46:57,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587881066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:57,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716754272] [2021-07-09 18:46:57,987 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 [2021-07-09 18:46:58,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:46:58,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:58,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:46:58,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:58,148 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:58,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716754272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:58,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:58,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-07-09 18:46:58,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21792864] [2021-07-09 18:46:58,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:46:58,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:58,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:46:58,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:46:58,149 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) [2021-07-09 18:46:58,834 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-07-09 18:46:59,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:59,626 INFO L93 Difference]: Finished difference Result 55738 states and 189163 transitions. [2021-07-09 18:46:59,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-09 18:46:59,627 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 [2021-07-09 18:46:59,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:59,969 INFO L225 Difference]: With dead ends: 55738 [2021-07-09 18:46:59,969 INFO L226 Difference]: Without dead ends: 55594 [2021-07-09 18:46:59,969 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2045 ImplicationChecksByTransitivity, 924.7ms TimeCoverageRelationStatistics Valid=1122, Invalid=4884, Unknown=0, NotChecked=0, Total=6006 [2021-07-09 18:47:00,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55594 states. [2021-07-09 18:47:00,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55594 to 27966. [2021-07-09 18:47:00,888 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) [2021-07-09 18:47:01,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27966 states to 27966 states and 100401 transitions. [2021-07-09 18:47:01,107 INFO L78 Accepts]: Start accepts. Automaton has 27966 states and 100401 transitions. Word has length 36 [2021-07-09 18:47:01,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:01,107 INFO L482 AbstractCegarLoop]: Abstraction has 27966 states and 100401 transitions. [2021-07-09 18:47:01,108 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) [2021-07-09 18:47:01,108 INFO L276 IsEmpty]: Start isEmpty. Operand 27966 states and 100401 transitions. [2021-07-09 18:47:01,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:47:01,160 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:01,160 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] [2021-07-09 18:47:01,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-07-09 18:47:01,360 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:01,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:01,361 INFO L82 PathProgramCache]: Analyzing trace with hash -201981896, now seen corresponding path program 138 times [2021-07-09 18:47:01,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:01,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167983338] [2021-07-09 18:47:01,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:01,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:01,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:01,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167983338] [2021-07-09 18:47:01,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167983338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:01,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739021110] [2021-07-09 18:47:01,418 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 [2021-07-09 18:47:01,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:47:01,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:01,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:47:01,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:47:01,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739021110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:01,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:01,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-09 18:47:01,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441706209] [2021-07-09 18:47:01,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:47:01,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:01,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:47:01,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:47:01,586 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) [2021-07-09 18:47:02,423 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-07-09 18:47:03,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:03,403 INFO L93 Difference]: Finished difference Result 58306 states and 196728 transitions. [2021-07-09 18:47:03,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-07-09 18:47:03,403 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 [2021-07-09 18:47:03,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:03,719 INFO L225 Difference]: With dead ends: 58306 [2021-07-09 18:47:03,719 INFO L226 Difference]: Without dead ends: 58238 [2021-07-09 18:47:03,719 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3796 ImplicationChecksByTransitivity, 1183.3ms TimeCoverageRelationStatistics Valid=1816, Invalid=7886, Unknown=0, NotChecked=0, Total=9702 [2021-07-09 18:47:03,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58238 states. [2021-07-09 18:47:04,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58238 to 28222. [2021-07-09 18:47:04,677 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) [2021-07-09 18:47:04,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28222 states to 28222 states and 101135 transitions. [2021-07-09 18:47:04,902 INFO L78 Accepts]: Start accepts. Automaton has 28222 states and 101135 transitions. Word has length 36 [2021-07-09 18:47:04,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:04,903 INFO L482 AbstractCegarLoop]: Abstraction has 28222 states and 101135 transitions. [2021-07-09 18:47:04,903 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) [2021-07-09 18:47:04,903 INFO L276 IsEmpty]: Start isEmpty. Operand 28222 states and 101135 transitions. [2021-07-09 18:47:04,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:47:04,955 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:04,955 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] [2021-07-09 18:47:05,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-07-09 18:47:05,155 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:05,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:05,156 INFO L82 PathProgramCache]: Analyzing trace with hash 838299316, now seen corresponding path program 139 times [2021-07-09 18:47:05,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:05,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467679458] [2021-07-09 18:47:05,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:05,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:05,213 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:05,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:05,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467679458] [2021-07-09 18:47:05,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467679458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:05,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750212278] [2021-07-09 18:47:05,213 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 [2021-07-09 18:47:05,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:05,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:47:05,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:05,351 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:05,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750212278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:05,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:05,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-07-09 18:47:05,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617084356] [2021-07-09 18:47:05,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:47:05,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:05,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:47:05,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:47:05,353 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) [2021-07-09 18:47:06,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:06,576 INFO L93 Difference]: Finished difference Result 58747 states and 196828 transitions. [2021-07-09 18:47:06,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:47:06,577 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 [2021-07-09 18:47:06,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:06,743 INFO L225 Difference]: With dead ends: 58747 [2021-07-09 18:47:06,743 INFO L226 Difference]: Without dead ends: 58747 [2021-07-09 18:47:06,743 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 694.3ms TimeCoverageRelationStatistics Valid=896, Invalid=2886, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:47:06,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58747 states. [2021-07-09 18:47:07,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58747 to 28292. [2021-07-09 18:47:07,916 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) [2021-07-09 18:47:07,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28292 states to 28292 states and 101374 transitions. [2021-07-09 18:47:07,998 INFO L78 Accepts]: Start accepts. Automaton has 28292 states and 101374 transitions. Word has length 36 [2021-07-09 18:47:07,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:07,998 INFO L482 AbstractCegarLoop]: Abstraction has 28292 states and 101374 transitions. [2021-07-09 18:47:07,998 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) [2021-07-09 18:47:07,998 INFO L276 IsEmpty]: Start isEmpty. Operand 28292 states and 101374 transitions. [2021-07-09 18:47:08,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:47:08,045 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:08,045 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] [2021-07-09 18:47:08,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:08,246 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:08,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:08,246 INFO L82 PathProgramCache]: Analyzing trace with hash 769453752, now seen corresponding path program 140 times [2021-07-09 18:47:08,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:08,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123791970] [2021-07-09 18:47:08,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:08,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:08,307 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:08,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:08,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123791970] [2021-07-09 18:47:08,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123791970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:08,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635822570] [2021-07-09 18:47:08,307 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 [2021-07-09 18:47:08,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:47:08,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:08,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:47:08,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:08,426 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:47:08,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635822570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:08,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:08,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-07-09 18:47:08,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394030839] [2021-07-09 18:47:08,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:47:08,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:08,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:47:08,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:47:08,427 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) [2021-07-09 18:47:10,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:10,363 INFO L93 Difference]: Finished difference Result 58143 states and 196081 transitions. [2021-07-09 18:47:10,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-07-09 18:47:10,363 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 [2021-07-09 18:47:10,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:10,553 INFO L225 Difference]: With dead ends: 58143 [2021-07-09 18:47:10,553 INFO L226 Difference]: Without dead ends: 57927 [2021-07-09 18:47:10,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 981.2ms TimeCoverageRelationStatistics Valid=1531, Invalid=7211, Unknown=0, NotChecked=0, Total=8742 [2021-07-09 18:47:10,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57927 states. [2021-07-09 18:47:11,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57927 to 28406. [2021-07-09 18:47:11,663 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) [2021-07-09 18:47:11,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28406 states to 28406 states and 101701 transitions. [2021-07-09 18:47:11,745 INFO L78 Accepts]: Start accepts. Automaton has 28406 states and 101701 transitions. Word has length 36 [2021-07-09 18:47:11,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:11,745 INFO L482 AbstractCegarLoop]: Abstraction has 28406 states and 101701 transitions. [2021-07-09 18:47:11,745 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) [2021-07-09 18:47:11,745 INFO L276 IsEmpty]: Start isEmpty. Operand 28406 states and 101701 transitions. [2021-07-09 18:47:11,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:47:11,793 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:11,793 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] [2021-07-09 18:47:11,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-07-09 18:47:11,994 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:11,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:11,994 INFO L82 PathProgramCache]: Analyzing trace with hash 851907644, now seen corresponding path program 141 times [2021-07-09 18:47:11,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:11,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386469613] [2021-07-09 18:47:11,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:12,053 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:12,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:12,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386469613] [2021-07-09 18:47:12,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386469613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:12,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931195569] [2021-07-09 18:47:12,053 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 [2021-07-09 18:47:12,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:47:12,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:12,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:47:12,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:12,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931195569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:12,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:12,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-07-09 18:47:12,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116970375] [2021-07-09 18:47:12,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:47:12,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:12,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:47:12,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:47:12,181 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) [2021-07-09 18:47:14,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:14,205 INFO L93 Difference]: Finished difference Result 56244 states and 191794 transitions. [2021-07-09 18:47:14,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-07-09 18:47:14,206 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 [2021-07-09 18:47:14,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:14,375 INFO L225 Difference]: With dead ends: 56244 [2021-07-09 18:47:14,375 INFO L226 Difference]: Without dead ends: 56088 [2021-07-09 18:47:14,376 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3741 ImplicationChecksByTransitivity, 1064.8ms TimeCoverageRelationStatistics Valid=1746, Invalid=8154, Unknown=0, NotChecked=0, Total=9900 [2021-07-09 18:47:14,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56088 states. [2021-07-09 18:47:15,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56088 to 28858. [2021-07-09 18:47:15,430 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) [2021-07-09 18:47:15,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28858 states to 28858 states and 102791 transitions. [2021-07-09 18:47:15,510 INFO L78 Accepts]: Start accepts. Automaton has 28858 states and 102791 transitions. Word has length 36 [2021-07-09 18:47:15,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:15,510 INFO L482 AbstractCegarLoop]: Abstraction has 28858 states and 102791 transitions. [2021-07-09 18:47:15,510 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) [2021-07-09 18:47:15,510 INFO L276 IsEmpty]: Start isEmpty. Operand 28858 states and 102791 transitions. [2021-07-09 18:47:15,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:47:15,557 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:15,558 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] [2021-07-09 18:47:15,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:15,758 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:15,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:15,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1657232324, now seen corresponding path program 142 times [2021-07-09 18:47:15,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:15,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021096167] [2021-07-09 18:47:15,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:15,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:15,818 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:15,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:15,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021096167] [2021-07-09 18:47:15,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021096167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:15,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787813885] [2021-07-09 18:47:15,818 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 [2021-07-09 18:47:15,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:47:15,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:15,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:47:15,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:47:15,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787813885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:15,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:15,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-07-09 18:47:15,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160929830] [2021-07-09 18:47:15,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:47:15,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:15,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:47:15,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:47:15,942 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) [2021-07-09 18:47:18,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:18,978 INFO L93 Difference]: Finished difference Result 62328 states and 208262 transitions. [2021-07-09 18:47:18,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2021-07-09 18:47:18,978 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 [2021-07-09 18:47:18,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:19,165 INFO L225 Difference]: With dead ends: 62328 [2021-07-09 18:47:19,166 INFO L226 Difference]: Without dead ends: 62328 [2021-07-09 18:47:19,167 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10889 ImplicationChecksByTransitivity, 2111.5ms TimeCoverageRelationStatistics Valid=4101, Invalid=20705, Unknown=0, NotChecked=0, Total=24806 [2021-07-09 18:47:19,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62328 states.