/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/multiply-verify.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:37:36,120 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:37:36,122 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:37:36,151 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 18:37:36,194 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 18:37:36,222 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:37:36,222 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:37:36,223 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:37:36,223 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:37:36,224 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:37:36,224 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:37:36,225 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:37:36,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:37:36,225 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:37:36,225 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:37:36,225 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:37:36,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:37:36,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:37:36,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:37:36,226 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:37:36,226 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:37:36,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:37:36,226 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:37:36,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:37:36,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:37:36,226 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:37:36,227 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:37:36,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:37:36,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:37:36,227 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:37:36,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:37:36,227 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:37:36,227 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:37:36,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:37:36,237 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:37:36,238 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:37:36,238 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:37:36,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:37:36,504 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:37:36,505 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:37:36,506 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:37:36,507 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:37:36,508 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/multiply-verify.wvr.bpl [2021-07-09 18:37:36,508 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/multiply-verify.wvr.bpl' [2021-07-09 18:37:36,553 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:37:36,554 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:37:36,555 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:37:36,555 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:37:36,555 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:37:36,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:37:36" (1/1) ... [2021-07-09 18:37:36,570 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:37:36" (1/1) ... [2021-07-09 18:37:36,578 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:37:36,579 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:37:36,579 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:37:36,580 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:37:36,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:37:36" (1/1) ... [2021-07-09 18:37:36,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:37:36" (1/1) ... [2021-07-09 18:37:36,586 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:37:36" (1/1) ... [2021-07-09 18:37:36,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:37:36" (1/1) ... [2021-07-09 18:37:36,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:37:36" (1/1) ... [2021-07-09 18:37:36,590 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:37:36" (1/1) ... [2021-07-09 18:37:36,591 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:37:36" (1/1) ... [2021-07-09 18:37:36,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:37:36,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:37:36,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:37:36,592 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:37:36,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:37:36" (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 18:37:36,658 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:37:36,658 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:37:36,658 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:37:36,659 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:37:36,659 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:37:36,659 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:37:36,659 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:37:36,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:37:36,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:37:36,659 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 18:37:36,659 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 18:37:36,659 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 18:37:36,660 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 18:37:36,845 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:37:36,845 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 18:37:36,846 INFO L202 PluginConnector]: Adding new model multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:37:36 BoogieIcfgContainer [2021-07-09 18:37:36,846 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:37:36,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:37:36,848 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:37:36,850 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:37:36,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:37:36" (1/2) ... [2021-07-09 18:37:36,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cbda867 and model type multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:37:36, skipping insertion in model container [2021-07-09 18:37:36,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:37:36" (2/2) ... [2021-07-09 18:37:36,852 INFO L111 eAbstractionObserver]: Analyzing ICFG multiply-verify.wvr.bpl [2021-07-09 18:37:36,855 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:37:36,856 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:37:36,856 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:37:36,856 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:37:36,937 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-09 18:37:36,953 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-09 18:37:36,965 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:37:36,965 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:37:36,965 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:37:36,965 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:37:36,965 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:37:36,965 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:37:36,966 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:37:36,966 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:37:36,972 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 33 transitions, 90 flow [2021-07-09 18:37:37,005 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 369 states, 368 states have (on average 2.75) internal successors, (1012), 368 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:37,008 INFO L276 IsEmpty]: Start isEmpty. Operand has 369 states, 368 states have (on average 2.75) internal successors, (1012), 368 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:37,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:37:37,021 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:37,021 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 18:37:37,022 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:37,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:37,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1255036480, now seen corresponding path program 1 times [2021-07-09 18:37:37,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:37,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527845205] [2021-07-09 18:37:37,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:37,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:37,339 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 18:37:37,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:37,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527845205] [2021-07-09 18:37:37,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527845205] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:37:37,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:37:37,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-09 18:37:37,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938057152] [2021-07-09 18:37:37,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:37:37,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:37,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:37:37,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:37:37,353 INFO L87 Difference]: Start difference. First operand has 369 states, 368 states have (on average 2.75) internal successors, (1012), 368 states have internal predecessors, (1012), 0 states have call successors, (0), 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 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 18:37:37,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:37,431 INFO L93 Difference]: Finished difference Result 349 states and 846 transitions. [2021-07-09 18:37:37,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:37:37,433 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 18:37:37,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:37,441 INFO L225 Difference]: With dead ends: 349 [2021-07-09 18:37:37,441 INFO L226 Difference]: Without dead ends: 311 [2021-07-09 18:37:37,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:37:37,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-07-09 18:37:37,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 293. [2021-07-09 18:37:37,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.482876712328767) internal successors, (725), 292 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:37,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 725 transitions. [2021-07-09 18:37:37,479 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 725 transitions. Word has length 22 [2021-07-09 18:37:37,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:37,479 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 725 transitions. [2021-07-09 18:37:37,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 18:37:37,480 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 725 transitions. [2021-07-09 18:37:37,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:37:37,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:37,482 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 18:37:37,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:37:37,482 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:37,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:37,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1026037738, now seen corresponding path program 2 times [2021-07-09 18:37:37,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:37,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854595660] [2021-07-09 18:37:37,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:37,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:37,565 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 18:37:37,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:37,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854595660] [2021-07-09 18:37:37,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854595660] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:37:37,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:37:37,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-09 18:37:37,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107132247] [2021-07-09 18:37:37,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:37:37,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:37,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:37:37,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:37:37,567 INFO L87 Difference]: Start difference. First operand 293 states and 725 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 18:37:37,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:37,658 INFO L93 Difference]: Finished difference Result 333 states and 800 transitions. [2021-07-09 18:37:37,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:37:37,659 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 18:37:37,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:37,660 INFO L225 Difference]: With dead ends: 333 [2021-07-09 18:37:37,661 INFO L226 Difference]: Without dead ends: 296 [2021-07-09 18:37:37,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:37:37,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-07-09 18:37:37,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 220. [2021-07-09 18:37:37,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.3926940639269407) internal successors, (524), 219 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:37,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 524 transitions. [2021-07-09 18:37:37,690 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 524 transitions. Word has length 22 [2021-07-09 18:37:37,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:37,690 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 524 transitions. [2021-07-09 18:37:37,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 18:37:37,690 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 524 transitions. [2021-07-09 18:37:37,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:37:37,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:37,691 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 18:37:37,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 18:37:37,692 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:37,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:37,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1622143654, now seen corresponding path program 3 times [2021-07-09 18:37:37,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:37,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521475927] [2021-07-09 18:37:37,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:37,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:37,790 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 18:37:37,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:37,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521475927] [2021-07-09 18:37:37,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521475927] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:37:37,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:37:37,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-09 18:37:37,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360185245] [2021-07-09 18:37:37,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:37:37,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:37,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:37:37,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:37:37,792 INFO L87 Difference]: Start difference. First operand 220 states and 524 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 18:37:37,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:37,840 INFO L93 Difference]: Finished difference Result 320 states and 768 transitions. [2021-07-09 18:37:37,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:37:37,840 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 18:37:37,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:37,842 INFO L225 Difference]: With dead ends: 320 [2021-07-09 18:37:37,842 INFO L226 Difference]: Without dead ends: 280 [2021-07-09 18:37:37,842 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:37:37,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-07-09 18:37:37,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 218. [2021-07-09 18:37:37,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.3824884792626726) internal successors, (517), 217 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:37,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 517 transitions. [2021-07-09 18:37:37,849 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 517 transitions. Word has length 22 [2021-07-09 18:37:37,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:37,850 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 517 transitions. [2021-07-09 18:37:37,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 18:37:37,850 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 517 transitions. [2021-07-09 18:37:37,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:37:37,851 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:37,851 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 18:37:37,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 18:37:37,851 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:37,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:37,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1222496346, now seen corresponding path program 4 times [2021-07-09 18:37:37,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:37,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881081282] [2021-07-09 18:37:37,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:37,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:37,958 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 18:37:37,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:37,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881081282] [2021-07-09 18:37:37,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881081282] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:37:37,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:37:37,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-09 18:37:37,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331974943] [2021-07-09 18:37:37,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:37:37,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:37,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:37:37,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:37:37,960 INFO L87 Difference]: Start difference. First operand 218 states and 517 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 18:37:38,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:38,008 INFO L93 Difference]: Finished difference Result 327 states and 775 transitions. [2021-07-09 18:37:38,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:37:38,008 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 18:37:38,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:38,010 INFO L225 Difference]: With dead ends: 327 [2021-07-09 18:37:38,010 INFO L226 Difference]: Without dead ends: 290 [2021-07-09 18:37:38,010 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:37:38,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-07-09 18:37:38,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 226. [2021-07-09 18:37:38,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.3866666666666667) internal successors, (537), 225 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:38,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 537 transitions. [2021-07-09 18:37:38,017 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 537 transitions. Word has length 22 [2021-07-09 18:37:38,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:38,017 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 537 transitions. [2021-07-09 18:37:38,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 18:37:38,017 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 537 transitions. [2021-07-09 18:37:38,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:37:38,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:38,018 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 18:37:38,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 18:37:38,018 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:38,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:38,019 INFO L82 PathProgramCache]: Analyzing trace with hash -290768546, now seen corresponding path program 5 times [2021-07-09 18:37:38,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:38,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761966750] [2021-07-09 18:37:38,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:38,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:38,125 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 18:37:38,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:38,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761966750] [2021-07-09 18:37:38,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761966750] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:37:38,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:37:38,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-09 18:37:38,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169308255] [2021-07-09 18:37:38,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:37:38,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:38,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:37:38,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:37:38,127 INFO L87 Difference]: Start difference. First operand 226 states and 537 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 18:37:38,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:38,187 INFO L93 Difference]: Finished difference Result 333 states and 810 transitions. [2021-07-09 18:37:38,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:37:38,187 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 18:37:38,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:38,189 INFO L225 Difference]: With dead ends: 333 [2021-07-09 18:37:38,189 INFO L226 Difference]: Without dead ends: 296 [2021-07-09 18:37:38,189 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:37:38,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-07-09 18:37:38,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 242. [2021-07-09 18:37:38,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.4356846473029043) internal successors, (587), 241 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:38,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 587 transitions. [2021-07-09 18:37:38,195 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 587 transitions. Word has length 22 [2021-07-09 18:37:38,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:38,195 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 587 transitions. [2021-07-09 18:37:38,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 18:37:38,195 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 587 transitions. [2021-07-09 18:37:38,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:37:38,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:38,196 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 18:37:38,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 18:37:38,196 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:38,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:38,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1531612134, now seen corresponding path program 6 times [2021-07-09 18:37:38,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:38,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971737929] [2021-07-09 18:37:38,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:38,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:38,257 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 18:37:38,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:38,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971737929] [2021-07-09 18:37:38,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971737929] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:37:38,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:37:38,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-09 18:37:38,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845916516] [2021-07-09 18:37:38,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:37:38,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:38,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:37:38,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:37:38,259 INFO L87 Difference]: Start difference. First operand 242 states and 587 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 18:37:38,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:38,322 INFO L93 Difference]: Finished difference Result 337 states and 817 transitions. [2021-07-09 18:37:38,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:37:38,323 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 18:37:38,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:38,324 INFO L225 Difference]: With dead ends: 337 [2021-07-09 18:37:38,325 INFO L226 Difference]: Without dead ends: 297 [2021-07-09 18:37:38,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:37:38,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-07-09 18:37:38,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 224. [2021-07-09 18:37:38,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.3856502242152464) internal successors, (532), 223 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:38,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 532 transitions. [2021-07-09 18:37:38,343 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 532 transitions. Word has length 22 [2021-07-09 18:37:38,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:38,344 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 532 transitions. [2021-07-09 18:37:38,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 18:37:38,344 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 532 transitions. [2021-07-09 18:37:38,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:37:38,344 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:38,344 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, 1] [2021-07-09 18:37:38,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-09 18:37:38,345 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:38,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:38,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1542585456, now seen corresponding path program 1 times [2021-07-09 18:37:38,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:38,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196885583] [2021-07-09 18:37:38,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:38,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:38,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:38,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:38,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196885583] [2021-07-09 18:37:38,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196885583] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:37:38,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:37:38,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:37:38,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434608603] [2021-07-09 18:37:38,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:37:38,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:38,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:37:38,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:37:38,376 INFO L87 Difference]: Start difference. First operand 224 states and 532 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:38,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:38,412 INFO L93 Difference]: Finished difference Result 316 states and 745 transitions. [2021-07-09 18:37:38,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:37:38,413 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:37:38,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:38,414 INFO L225 Difference]: With dead ends: 316 [2021-07-09 18:37:38,414 INFO L226 Difference]: Without dead ends: 316 [2021-07-09 18:37:38,414 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:37:38,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-07-09 18:37:38,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 213. [2021-07-09 18:37:38,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.4245283018867925) internal successors, (514), 212 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:38,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 514 transitions. [2021-07-09 18:37:38,419 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 514 transitions. Word has length 25 [2021-07-09 18:37:38,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:38,419 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 514 transitions. [2021-07-09 18:37:38,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:38,419 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 514 transitions. [2021-07-09 18:37:38,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:37:38,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:38,420 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, 1] [2021-07-09 18:37:38,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-09 18:37:38,420 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:38,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:38,420 INFO L82 PathProgramCache]: Analyzing trace with hash -263047510, now seen corresponding path program 1 times [2021-07-09 18:37:38,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:38,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635210880] [2021-07-09 18:37:38,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:38,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:38,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:38,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:38,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635210880] [2021-07-09 18:37:38,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635210880] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:37:38,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:37:38,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:37:38,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553050067] [2021-07-09 18:37:38,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:37:38,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:38,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:37:38,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:37:38,441 INFO L87 Difference]: Start difference. First operand 213 states and 514 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:38,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:38,483 INFO L93 Difference]: Finished difference Result 361 states and 847 transitions. [2021-07-09 18:37:38,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:37:38,484 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:37:38,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:38,486 INFO L225 Difference]: With dead ends: 361 [2021-07-09 18:37:38,486 INFO L226 Difference]: Without dead ends: 337 [2021-07-09 18:37:38,486 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:37:38,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-07-09 18:37:38,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 213. [2021-07-09 18:37:38,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.400943396226415) internal successors, (509), 212 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:38,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 509 transitions. [2021-07-09 18:37:38,491 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 509 transitions. Word has length 25 [2021-07-09 18:37:38,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:38,491 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 509 transitions. [2021-07-09 18:37:38,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:38,491 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 509 transitions. [2021-07-09 18:37:38,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:37:38,491 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:38,491 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, 1] [2021-07-09 18:37:38,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-09 18:37:38,492 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:38,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:38,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1947593430, now seen corresponding path program 2 times [2021-07-09 18:37:38,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:38,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789325925] [2021-07-09 18:37:38,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:38,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:38,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:38,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:38,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789325925] [2021-07-09 18:37:38,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789325925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:38,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881579934] [2021-07-09 18:37:38,513 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 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 18:37:38,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:37:38,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:38,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:37:38,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:38,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:38,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881579934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:38,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:38,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 18:37:38,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892425926] [2021-07-09 18:37:38,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:37:38,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:38,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:37:38,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:37:38,629 INFO L87 Difference]: Start difference. First operand 213 states and 509 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:38,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:38,701 INFO L93 Difference]: Finished difference Result 495 states and 1157 transitions. [2021-07-09 18:37:38,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:37:38,701 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:37:38,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:38,703 INFO L225 Difference]: With dead ends: 495 [2021-07-09 18:37:38,703 INFO L226 Difference]: Without dead ends: 495 [2021-07-09 18:37:38,703 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:37:38,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-07-09 18:37:38,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 221. [2021-07-09 18:37:38,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.4318181818181817) internal successors, (535), 220 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:38,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 535 transitions. [2021-07-09 18:37:38,710 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 535 transitions. Word has length 25 [2021-07-09 18:37:38,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:38,710 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 535 transitions. [2021-07-09 18:37:38,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:38,710 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 535 transitions. [2021-07-09 18:37:38,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:37:38,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:38,711 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, 1] [2021-07-09 18:37:38,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-07-09 18:37:38,931 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:38,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:38,931 INFO L82 PathProgramCache]: Analyzing trace with hash 2136676820, now seen corresponding path program 2 times [2021-07-09 18:37:38,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:38,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562412860] [2021-07-09 18:37:38,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:38,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:38,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:38,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562412860] [2021-07-09 18:37:38,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562412860] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:37:38,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:37:38,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:37:38,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458274937] [2021-07-09 18:37:38,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:37:38,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:38,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:37:38,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:37:38,951 INFO L87 Difference]: Start difference. First operand 221 states and 535 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:38,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:38,991 INFO L93 Difference]: Finished difference Result 341 states and 802 transitions. [2021-07-09 18:37:38,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:37:38,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:37:38,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:38,993 INFO L225 Difference]: With dead ends: 341 [2021-07-09 18:37:38,993 INFO L226 Difference]: Without dead ends: 335 [2021-07-09 18:37:38,994 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:37:38,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-07-09 18:37:38,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 245. [2021-07-09 18:37:38,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.4385245901639343) internal successors, (595), 244 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:38,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 595 transitions. [2021-07-09 18:37:38,999 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 595 transitions. Word has length 25 [2021-07-09 18:37:38,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:38,999 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 595 transitions. [2021-07-09 18:37:38,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:38,999 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 595 transitions. [2021-07-09 18:37:39,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:37:39,001 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:39,001 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, 1] [2021-07-09 18:37:39,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-09 18:37:39,001 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:39,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:39,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1429538658, now seen corresponding path program 3 times [2021-07-09 18:37:39,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:39,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985541400] [2021-07-09 18:37:39,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:39,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:39,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:39,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:39,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985541400] [2021-07-09 18:37:39,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985541400] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:37:39,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:37:39,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:37:39,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239445621] [2021-07-09 18:37:39,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:37:39,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:39,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:37:39,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:37:39,043 INFO L87 Difference]: Start difference. First operand 245 states and 595 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:39,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:39,091 INFO L93 Difference]: Finished difference Result 284 states and 686 transitions. [2021-07-09 18:37:39,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:37:39,092 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:37:39,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:39,093 INFO L225 Difference]: With dead ends: 284 [2021-07-09 18:37:39,093 INFO L226 Difference]: Without dead ends: 284 [2021-07-09 18:37:39,093 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:37:39,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-07-09 18:37:39,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 221. [2021-07-09 18:37:39,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.422727272727273) internal successors, (533), 220 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:39,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 533 transitions. [2021-07-09 18:37:39,098 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 533 transitions. Word has length 25 [2021-07-09 18:37:39,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:39,098 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 533 transitions. [2021-07-09 18:37:39,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:39,098 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 533 transitions. [2021-07-09 18:37:39,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:37:39,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:39,099 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, 1] [2021-07-09 18:37:39,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-07-09 18:37:39,099 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:39,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:39,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1806509812, now seen corresponding path program 3 times [2021-07-09 18:37:39,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:39,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144265585] [2021-07-09 18:37:39,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:39,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:39,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:39,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:39,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144265585] [2021-07-09 18:37:39,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144265585] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:37:39,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:37:39,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:37:39,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870071870] [2021-07-09 18:37:39,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:37:39,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:39,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:37:39,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:37:39,124 INFO L87 Difference]: Start difference. First operand 221 states and 533 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:39,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:39,179 INFO L93 Difference]: Finished difference Result 394 states and 930 transitions. [2021-07-09 18:37:39,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:37:39,179 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:37:39,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:39,181 INFO L225 Difference]: With dead ends: 394 [2021-07-09 18:37:39,181 INFO L226 Difference]: Without dead ends: 387 [2021-07-09 18:37:39,181 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:37:39,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-07-09 18:37:39,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 221. [2021-07-09 18:37:39,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.4136363636363636) internal successors, (531), 220 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:39,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 531 transitions. [2021-07-09 18:37:39,186 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 531 transitions. Word has length 25 [2021-07-09 18:37:39,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:39,186 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 531 transitions. [2021-07-09 18:37:39,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:39,186 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 531 transitions. [2021-07-09 18:37:39,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:37:39,186 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:39,187 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, 1] [2021-07-09 18:37:39,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-09 18:37:39,187 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:39,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:39,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1574415630, now seen corresponding path program 4 times [2021-07-09 18:37:39,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:39,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861333096] [2021-07-09 18:37:39,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:39,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:39,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:39,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861333096] [2021-07-09 18:37:39,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861333096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:39,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486405939] [2021-07-09 18:37:39,203 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 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 18:37:39,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:37:39,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:39,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:37:39,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:39,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:39,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486405939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:39,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:39,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-09 18:37:39,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187554664] [2021-07-09 18:37:39,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:37:39,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:39,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:37:39,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:37:39,303 INFO L87 Difference]: Start difference. First operand 221 states and 531 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:39,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:39,352 INFO L93 Difference]: Finished difference Result 340 states and 811 transitions. [2021-07-09 18:37:39,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:37:39,353 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:37:39,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:39,354 INFO L225 Difference]: With dead ends: 340 [2021-07-09 18:37:39,354 INFO L226 Difference]: Without dead ends: 340 [2021-07-09 18:37:39,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 32.3ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:37:39,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-07-09 18:37:39,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 209. [2021-07-09 18:37:39,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.4278846153846154) internal successors, (505), 208 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:39,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 505 transitions. [2021-07-09 18:37:39,359 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 505 transitions. Word has length 25 [2021-07-09 18:37:39,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:39,360 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 505 transitions. [2021-07-09 18:37:39,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:39,360 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 505 transitions. [2021-07-09 18:37:39,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:37:39,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:39,360 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, 1] [2021-07-09 18:37:39,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-09 18:37:39,571 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:39,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:39,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1219695586, now seen corresponding path program 4 times [2021-07-09 18:37:39,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:39,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34513683] [2021-07-09 18:37:39,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:39,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:39,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:39,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34513683] [2021-07-09 18:37:39,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34513683] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:37:39,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:37:39,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:37:39,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748506892] [2021-07-09 18:37:39,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:37:39,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:39,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:37:39,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:37:39,600 INFO L87 Difference]: Start difference. First operand 209 states and 505 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:39,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:39,638 INFO L93 Difference]: Finished difference Result 348 states and 822 transitions. [2021-07-09 18:37:39,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:37:39,638 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:37:39,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:39,639 INFO L225 Difference]: With dead ends: 348 [2021-07-09 18:37:39,640 INFO L226 Difference]: Without dead ends: 330 [2021-07-09 18:37:39,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:37:39,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-07-09 18:37:39,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 209. [2021-07-09 18:37:39,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.4086538461538463) internal successors, (501), 208 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:39,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 501 transitions. [2021-07-09 18:37:39,644 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 501 transitions. Word has length 25 [2021-07-09 18:37:39,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:39,644 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 501 transitions. [2021-07-09 18:37:39,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:39,644 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 501 transitions. [2021-07-09 18:37:39,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:37:39,645 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:39,645 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, 1] [2021-07-09 18:37:39,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-07-09 18:37:39,645 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:39,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:39,646 INFO L82 PathProgramCache]: Analyzing trace with hash 756519376, now seen corresponding path program 5 times [2021-07-09 18:37:39,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:39,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357579608] [2021-07-09 18:37:39,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:39,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:39,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:39,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:39,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357579608] [2021-07-09 18:37:39,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357579608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:39,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004946683] [2021-07-09 18:37:39,676 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 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 18:37:39,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:37:39,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:39,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:37:39,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:39,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004946683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:39,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:39,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 18:37:39,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916689184] [2021-07-09 18:37:39,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:37:39,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:39,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:37:39,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:37:39,757 INFO L87 Difference]: Start difference. First operand 209 states and 501 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:39,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:39,818 INFO L93 Difference]: Finished difference Result 379 states and 891 transitions. [2021-07-09 18:37:39,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:37:39,819 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:37:39,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:39,820 INFO L225 Difference]: With dead ends: 379 [2021-07-09 18:37:39,820 INFO L226 Difference]: Without dead ends: 379 [2021-07-09 18:37:39,821 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:37:39,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-07-09 18:37:39,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 209. [2021-07-09 18:37:39,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.4086538461538463) internal successors, (501), 208 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:39,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 501 transitions. [2021-07-09 18:37:39,826 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 501 transitions. Word has length 25 [2021-07-09 18:37:39,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:39,826 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 501 transitions. [2021-07-09 18:37:39,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:39,826 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 501 transitions. [2021-07-09 18:37:39,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:37:39,828 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:39,828 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, 1] [2021-07-09 18:37:40,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 18:37:40,037 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:40,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:40,037 INFO L82 PathProgramCache]: Analyzing trace with hash 545822330, now seen corresponding path program 5 times [2021-07-09 18:37:40,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:40,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165969716] [2021-07-09 18:37:40,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:40,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:40,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:40,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165969716] [2021-07-09 18:37:40,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165969716] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:37:40,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:37:40,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:37:40,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93595543] [2021-07-09 18:37:40,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:37:40,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:40,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:37:40,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:37:40,052 INFO L87 Difference]: Start difference. First operand 209 states and 501 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:40,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:40,101 INFO L93 Difference]: Finished difference Result 381 states and 892 transitions. [2021-07-09 18:37:40,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:37:40,101 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:37:40,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:40,103 INFO L225 Difference]: With dead ends: 381 [2021-07-09 18:37:40,103 INFO L226 Difference]: Without dead ends: 375 [2021-07-09 18:37:40,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:37:40,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-07-09 18:37:40,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 233. [2021-07-09 18:37:40,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.418103448275862) internal successors, (561), 232 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:40,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 561 transitions. [2021-07-09 18:37:40,116 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 561 transitions. Word has length 25 [2021-07-09 18:37:40,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:40,116 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 561 transitions. [2021-07-09 18:37:40,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:40,116 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 561 transitions. [2021-07-09 18:37:40,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:37:40,117 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:40,117 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, 1] [2021-07-09 18:37:40,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-07-09 18:37:40,117 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:40,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:40,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1274574148, now seen corresponding path program 6 times [2021-07-09 18:37:40,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:40,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750870793] [2021-07-09 18:37:40,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:40,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:40,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:40,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:40,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750870793] [2021-07-09 18:37:40,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750870793] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:37:40,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:37:40,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:37:40,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196449493] [2021-07-09 18:37:40,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:37:40,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:40,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:37:40,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:37:40,137 INFO L87 Difference]: Start difference. First operand 233 states and 561 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:40,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:40,179 INFO L93 Difference]: Finished difference Result 311 states and 744 transitions. [2021-07-09 18:37:40,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:37:40,179 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:37:40,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:40,180 INFO L225 Difference]: With dead ends: 311 [2021-07-09 18:37:40,180 INFO L226 Difference]: Without dead ends: 311 [2021-07-09 18:37:40,181 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:37:40,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-07-09 18:37:40,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 209. [2021-07-09 18:37:40,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.3990384615384617) internal successors, (499), 208 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:40,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 499 transitions. [2021-07-09 18:37:40,185 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 499 transitions. Word has length 25 [2021-07-09 18:37:40,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:40,186 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 499 transitions. [2021-07-09 18:37:40,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:40,186 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 499 transitions. [2021-07-09 18:37:40,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:37:40,186 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:40,186 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, 1] [2021-07-09 18:37:40,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-07-09 18:37:40,187 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:40,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:40,187 INFO L82 PathProgramCache]: Analyzing trace with hash 897602994, now seen corresponding path program 6 times [2021-07-09 18:37:40,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:40,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892016223] [2021-07-09 18:37:40,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:40,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:40,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:40,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:40,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892016223] [2021-07-09 18:37:40,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892016223] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:37:40,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:37:40,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:37:40,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690754201] [2021-07-09 18:37:40,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:37:40,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:40,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:37:40,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:37:40,206 INFO L87 Difference]: Start difference. First operand 209 states and 499 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:40,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:40,243 INFO L93 Difference]: Finished difference Result 256 states and 607 transitions. [2021-07-09 18:37:40,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:37:40,244 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:37:40,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:40,245 INFO L225 Difference]: With dead ends: 256 [2021-07-09 18:37:40,245 INFO L226 Difference]: Without dead ends: 249 [2021-07-09 18:37:40,245 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:37:40,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-07-09 18:37:40,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 207. [2021-07-09 18:37:40,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.3883495145631066) internal successors, (492), 206 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:40,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 492 transitions. [2021-07-09 18:37:40,249 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 492 transitions. Word has length 25 [2021-07-09 18:37:40,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:40,249 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 492 transitions. [2021-07-09 18:37:40,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:40,249 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 492 transitions. [2021-07-09 18:37:40,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:37:40,250 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:40,250 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, 1, 1, 1, 1] [2021-07-09 18:37:40,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-07-09 18:37:40,250 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:40,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:40,250 INFO L82 PathProgramCache]: Analyzing trace with hash 2142631590, now seen corresponding path program 1 times [2021-07-09 18:37:40,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:40,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168727222] [2021-07-09 18:37:40,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:40,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:40,345 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 18:37:40,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:40,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168727222] [2021-07-09 18:37:40,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168727222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:40,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252300878] [2021-07-09 18:37:40,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) [2021-07-09 18:37:40,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:40,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:37:40,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:40,454 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 18:37:40,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252300878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:40,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:40,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 18:37:40,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482849848] [2021-07-09 18:37:40,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:37:40,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:40,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:37:40,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:37:40,456 INFO L87 Difference]: Start difference. First operand 207 states and 492 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:40,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:40,555 INFO L93 Difference]: Finished difference Result 469 states and 1199 transitions. [2021-07-09 18:37:40,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:37:40,555 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:37:40,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:40,557 INFO L225 Difference]: With dead ends: 469 [2021-07-09 18:37:40,557 INFO L226 Difference]: Without dead ends: 432 [2021-07-09 18:37:40,557 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 83.5ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:37:40,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-07-09 18:37:40,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 310. [2021-07-09 18:37:40,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.5242718446601944) internal successors, (780), 309 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:40,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 780 transitions. [2021-07-09 18:37:40,563 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 780 transitions. Word has length 28 [2021-07-09 18:37:40,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:40,563 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 780 transitions. [2021-07-09 18:37:40,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:40,563 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 780 transitions. [2021-07-09 18:37:40,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:37:40,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:40,564 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, 1, 1, 1, 1] [2021-07-09 18:37:40,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:40,777 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:40,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:40,777 INFO L82 PathProgramCache]: Analyzing trace with hash 2023548578, now seen corresponding path program 2 times [2021-07-09 18:37:40,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:40,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728539745] [2021-07-09 18:37:40,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:40,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:40,875 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 18:37:40,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:40,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728539745] [2021-07-09 18:37:40,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728539745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:40,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717329075] [2021-07-09 18:37:40,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:37:40,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:37:40,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:40,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:37:40,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:40,979 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 18:37:40,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717329075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:40,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:40,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 18:37:40,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674258314] [2021-07-09 18:37:40,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:37:40,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:40,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:37:40,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:37:40,981 INFO L87 Difference]: Start difference. First operand 310 states and 780 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:41,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:41,090 INFO L93 Difference]: Finished difference Result 477 states and 1212 transitions. [2021-07-09 18:37:41,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:37:41,090 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:37:41,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:41,092 INFO L225 Difference]: With dead ends: 477 [2021-07-09 18:37:41,092 INFO L226 Difference]: Without dead ends: 435 [2021-07-09 18:37:41,092 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:37:41,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-07-09 18:37:41,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 309. [2021-07-09 18:37:41,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.50974025974026) internal successors, (773), 308 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:41,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 773 transitions. [2021-07-09 18:37:41,098 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 773 transitions. Word has length 28 [2021-07-09 18:37:41,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:41,099 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 773 transitions. [2021-07-09 18:37:41,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:41,099 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 773 transitions. [2021-07-09 18:37:41,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:37:41,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:41,099 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, 1, 1, 1, 1] [2021-07-09 18:37:41,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:41,309 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:41,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:41,309 INFO L82 PathProgramCache]: Analyzing trace with hash -2127131136, now seen corresponding path program 3 times [2021-07-09 18:37:41,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:41,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806551166] [2021-07-09 18:37:41,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:41,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:41,387 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 18:37:41,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:41,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806551166] [2021-07-09 18:37:41,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806551166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:41,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92341728] [2021-07-09 18:37:41,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:41,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:37:41,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:41,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:37:41,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:41,503 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 18:37:41,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92341728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:41,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:41,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 18:37:41,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711498997] [2021-07-09 18:37:41,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:37:41,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:41,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:37:41,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:37:41,505 INFO L87 Difference]: Start difference. First operand 309 states and 773 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:41,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:41,579 INFO L93 Difference]: Finished difference Result 497 states and 1252 transitions. [2021-07-09 18:37:41,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:37:41,579 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:37:41,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:41,581 INFO L225 Difference]: With dead ends: 497 [2021-07-09 18:37:41,581 INFO L226 Difference]: Without dead ends: 459 [2021-07-09 18:37:41,581 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:37:41,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-07-09 18:37:41,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 342. [2021-07-09 18:37:41,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.504398826979472) internal successors, (854), 341 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:41,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 854 transitions. [2021-07-09 18:37:41,588 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 854 transitions. Word has length 28 [2021-07-09 18:37:41,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:41,588 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 854 transitions. [2021-07-09 18:37:41,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:41,589 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 854 transitions. [2021-07-09 18:37:41,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:37:41,590 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:41,590 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, 1, 1, 1, 1] [2021-07-09 18:37:41,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:41,801 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:41,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:41,801 INFO L82 PathProgramCache]: Analyzing trace with hash 76882114, now seen corresponding path program 4 times [2021-07-09 18:37:41,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:41,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198825563] [2021-07-09 18:37:41,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:41,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:41,899 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 18:37:41,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:41,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198825563] [2021-07-09 18:37:41,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198825563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:41,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383675717] [2021-07-09 18:37:41,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:41,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:37:41,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:41,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:37:41,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:42,009 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 18:37:42,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383675717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:42,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:42,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 18:37:42,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679998115] [2021-07-09 18:37:42,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:37:42,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:42,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:37:42,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:37:42,011 INFO L87 Difference]: Start difference. First operand 342 states and 854 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:42,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:42,091 INFO L93 Difference]: Finished difference Result 548 states and 1355 transitions. [2021-07-09 18:37:42,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:37:42,091 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:37:42,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:42,093 INFO L225 Difference]: With dead ends: 548 [2021-07-09 18:37:42,093 INFO L226 Difference]: Without dead ends: 510 [2021-07-09 18:37:42,094 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 97.8ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:37:42,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-07-09 18:37:42,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 349. [2021-07-09 18:37:42,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.4913793103448274) internal successors, (867), 348 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:42,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 867 transitions. [2021-07-09 18:37:42,100 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 867 transitions. Word has length 28 [2021-07-09 18:37:42,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:42,101 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 867 transitions. [2021-07-09 18:37:42,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:42,101 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 867 transitions. [2021-07-09 18:37:42,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:37:42,101 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:42,101 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, 1, 1, 1, 1] [2021-07-09 18:37:42,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:42,317 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:42,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:42,317 INFO L82 PathProgramCache]: Analyzing trace with hash 506706334, now seen corresponding path program 5 times [2021-07-09 18:37:42,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:42,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297685692] [2021-07-09 18:37:42,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:42,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:42,404 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 18:37:42,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:42,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297685692] [2021-07-09 18:37:42,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297685692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:42,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947708621] [2021-07-09 18:37:42,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:42,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:37:42,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:42,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:37:42,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:42,518 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 18:37:42,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947708621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:42,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:42,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:37:42,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966983292] [2021-07-09 18:37:42,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:37:42,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:42,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:37:42,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:37:42,519 INFO L87 Difference]: Start difference. First operand 349 states and 867 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:42,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:42,591 INFO L93 Difference]: Finished difference Result 530 states and 1325 transitions. [2021-07-09 18:37:42,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:37:42,591 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:37:42,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:42,593 INFO L225 Difference]: With dead ends: 530 [2021-07-09 18:37:42,593 INFO L226 Difference]: Without dead ends: 493 [2021-07-09 18:37:42,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:37:42,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-07-09 18:37:42,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 439. [2021-07-09 18:37:42,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.5525114155251143) internal successors, (1118), 438 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:42,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1118 transitions. [2021-07-09 18:37:42,600 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1118 transitions. Word has length 28 [2021-07-09 18:37:42,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:42,600 INFO L482 AbstractCegarLoop]: Abstraction has 439 states and 1118 transitions. [2021-07-09 18:37:42,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:42,601 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1118 transitions. [2021-07-09 18:37:42,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:37:42,601 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:42,601 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, 1, 1, 1, 1] [2021-07-09 18:37:42,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 18:37:42,817 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:42,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:42,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1783210398, now seen corresponding path program 6 times [2021-07-09 18:37:42,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:42,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721837505] [2021-07-09 18:37:42,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:42,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:42,902 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 18:37:42,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:42,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721837505] [2021-07-09 18:37:42,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721837505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:42,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796294138] [2021-07-09 18:37:42,903 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:42,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:37:42,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:42,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:37:42,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:43,047 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 18:37:43,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796294138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:43,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:43,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-07-09 18:37:43,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000945916] [2021-07-09 18:37:43,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:37:43,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:43,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:37:43,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:37:43,049 INFO L87 Difference]: Start difference. First operand 439 states and 1118 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:43,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:43,114 INFO L93 Difference]: Finished difference Result 526 states and 1316 transitions. [2021-07-09 18:37:43,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:37:43,114 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:37:43,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:43,116 INFO L225 Difference]: With dead ends: 526 [2021-07-09 18:37:43,116 INFO L226 Difference]: Without dead ends: 486 [2021-07-09 18:37:43,116 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 86.1ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:37:43,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-07-09 18:37:43,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 429. [2021-07-09 18:37:43,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.5490654205607477) internal successors, (1091), 428 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:43,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1091 transitions. [2021-07-09 18:37:43,123 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1091 transitions. Word has length 28 [2021-07-09 18:37:43,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:43,123 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1091 transitions. [2021-07-09 18:37:43,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:43,124 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1091 transitions. [2021-07-09 18:37:43,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:37:43,124 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:43,124 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, 1, 1, 1, 1] [2021-07-09 18:37:43,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:43,339 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:43,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:43,339 INFO L82 PathProgramCache]: Analyzing trace with hash -961151642, now seen corresponding path program 7 times [2021-07-09 18:37:43,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:43,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234182439] [2021-07-09 18:37:43,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:43,418 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 18:37:43,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:43,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234182439] [2021-07-09 18:37:43,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234182439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:43,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405133705] [2021-07-09 18:37:43,419 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:43,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:43,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:37:43,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:43,544 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 18:37:43,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405133705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:43,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:43,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:37:43,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129645159] [2021-07-09 18:37:43,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:37:43,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:43,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:37:43,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:37:43,546 INFO L87 Difference]: Start difference. First operand 429 states and 1091 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:43,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:43,622 INFO L93 Difference]: Finished difference Result 623 states and 1567 transitions. [2021-07-09 18:37:43,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:37:43,622 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:37:43,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:43,624 INFO L225 Difference]: With dead ends: 623 [2021-07-09 18:37:43,624 INFO L226 Difference]: Without dead ends: 585 [2021-07-09 18:37:43,624 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:37:43,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-07-09 18:37:43,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 479. [2021-07-09 18:37:43,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 2.598326359832636) internal successors, (1242), 478 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:43,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1242 transitions. [2021-07-09 18:37:43,633 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1242 transitions. Word has length 28 [2021-07-09 18:37:43,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:43,633 INFO L482 AbstractCegarLoop]: Abstraction has 479 states and 1242 transitions. [2021-07-09 18:37:43,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:43,633 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1242 transitions. [2021-07-09 18:37:43,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:37:43,636 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:43,637 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, 1, 1, 1, 1] [2021-07-09 18:37:43,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:43,856 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:43,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:43,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1190067302, now seen corresponding path program 8 times [2021-07-09 18:37:43,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:43,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475803906] [2021-07-09 18:37:43,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:43,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:43,937 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 18:37:43,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:43,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475803906] [2021-07-09 18:37:43,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475803906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:43,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228285868] [2021-07-09 18:37:43,938 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 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 18:37:43,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:37:43,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:43,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:37:43,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:44,031 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 18:37:44,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228285868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:44,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:44,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 18:37:44,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236915600] [2021-07-09 18:37:44,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:37:44,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:44,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:37:44,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:37:44,032 INFO L87 Difference]: Start difference. First operand 479 states and 1242 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:44,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:44,106 INFO L93 Difference]: Finished difference Result 774 states and 2027 transitions. [2021-07-09 18:37:44,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:37:44,106 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:37:44,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:44,109 INFO L225 Difference]: With dead ends: 774 [2021-07-09 18:37:44,109 INFO L226 Difference]: Without dead ends: 737 [2021-07-09 18:37:44,109 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:37:44,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-07-09 18:37:44,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 491. [2021-07-09 18:37:44,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 2.595918367346939) internal successors, (1272), 490 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:44,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1272 transitions. [2021-07-09 18:37:44,117 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1272 transitions. Word has length 28 [2021-07-09 18:37:44,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:44,117 INFO L482 AbstractCegarLoop]: Abstraction has 491 states and 1272 transitions. [2021-07-09 18:37:44,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:44,117 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1272 transitions. [2021-07-09 18:37:44,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:37:44,119 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:44,119 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, 1, 1, 1, 1] [2021-07-09 18:37:44,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-09 18:37:44,333 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:44,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:44,333 INFO L82 PathProgramCache]: Analyzing trace with hash -507591454, now seen corresponding path program 9 times [2021-07-09 18:37:44,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:44,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234880507] [2021-07-09 18:37:44,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:44,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:44,421 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 18:37:44,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:44,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234880507] [2021-07-09 18:37:44,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234880507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:44,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011904635] [2021-07-09 18:37:44,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:44,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:37:44,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:44,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:37:44,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:44,539 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 18:37:44,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011904635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:44,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:44,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 18:37:44,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008551123] [2021-07-09 18:37:44,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:37:44,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:44,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:37:44,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:37:44,540 INFO L87 Difference]: Start difference. First operand 491 states and 1272 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:44,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:44,633 INFO L93 Difference]: Finished difference Result 766 states and 2025 transitions. [2021-07-09 18:37:44,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:37:44,634 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:37:44,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:44,636 INFO L225 Difference]: With dead ends: 766 [2021-07-09 18:37:44,636 INFO L226 Difference]: Without dead ends: 729 [2021-07-09 18:37:44,636 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 87.8ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:37:44,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-07-09 18:37:44,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 509. [2021-07-09 18:37:44,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 2.604330708661417) internal successors, (1323), 508 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:44,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1323 transitions. [2021-07-09 18:37:44,646 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1323 transitions. Word has length 28 [2021-07-09 18:37:44,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:44,646 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 1323 transitions. [2021-07-09 18:37:44,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:44,646 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1323 transitions. [2021-07-09 18:37:44,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:37:44,647 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:44,647 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, 1, 1, 1, 1] [2021-07-09 18:37:44,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 18:37:44,864 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:44,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:44,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1491384154, now seen corresponding path program 10 times [2021-07-09 18:37:44,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:44,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799849968] [2021-07-09 18:37:44,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:44,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:44,952 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 18:37:44,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:44,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799849968] [2021-07-09 18:37:44,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799849968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:44,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398342941] [2021-07-09 18:37:44,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:44,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:37:44,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:44,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:37:44,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:45,060 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 18:37:45,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398342941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:45,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:45,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 18:37:45,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769038415] [2021-07-09 18:37:45,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:37:45,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:45,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:37:45,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:37:45,061 INFO L87 Difference]: Start difference. First operand 509 states and 1323 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:45,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:45,163 INFO L93 Difference]: Finished difference Result 860 states and 2316 transitions. [2021-07-09 18:37:45,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:37:45,164 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:37:45,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:45,166 INFO L225 Difference]: With dead ends: 860 [2021-07-09 18:37:45,166 INFO L226 Difference]: Without dead ends: 823 [2021-07-09 18:37:45,167 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:37:45,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-07-09 18:37:45,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 587. [2021-07-09 18:37:45,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 2.645051194539249) internal successors, (1550), 586 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:45,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1550 transitions. [2021-07-09 18:37:45,176 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1550 transitions. Word has length 28 [2021-07-09 18:37:45,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:45,176 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1550 transitions. [2021-07-09 18:37:45,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:45,176 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1550 transitions. [2021-07-09 18:37:45,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:37:45,177 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:45,177 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, 1, 1, 1, 1] [2021-07-09 18:37:45,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-09 18:37:45,389 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:45,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:45,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1610467166, now seen corresponding path program 11 times [2021-07-09 18:37:45,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:45,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493374683] [2021-07-09 18:37:45,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:45,460 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 18:37:45,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:45,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493374683] [2021-07-09 18:37:45,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493374683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:45,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039232778] [2021-07-09 18:37:45,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:45,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:37:45,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:45,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:37:45,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:45,559 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 18:37:45,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039232778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:45,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:45,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 18:37:45,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219462356] [2021-07-09 18:37:45,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:37:45,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:45,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:37:45,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:37:45,560 INFO L87 Difference]: Start difference. First operand 587 states and 1550 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:45,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:45,669 INFO L93 Difference]: Finished difference Result 864 states and 2321 transitions. [2021-07-09 18:37:45,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:37:45,669 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:37:45,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:45,672 INFO L225 Difference]: With dead ends: 864 [2021-07-09 18:37:45,672 INFO L226 Difference]: Without dead ends: 822 [2021-07-09 18:37:45,673 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 102.3ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:37:45,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-07-09 18:37:45,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 571. [2021-07-09 18:37:45,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 2.645614035087719) internal successors, (1508), 570 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:45,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1508 transitions. [2021-07-09 18:37:45,693 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1508 transitions. Word has length 28 [2021-07-09 18:37:45,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:45,693 INFO L482 AbstractCegarLoop]: Abstraction has 571 states and 1508 transitions. [2021-07-09 18:37:45,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:45,693 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1508 transitions. [2021-07-09 18:37:45,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:37:45,694 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:45,694 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, 1, 1, 1, 1] [2021-07-09 18:37:45,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:45,911 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:45,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:45,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1452503728, now seen corresponding path program 12 times [2021-07-09 18:37:45,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:45,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051199756] [2021-07-09 18:37:45,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:45,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:45,983 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 18:37:45,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:45,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051199756] [2021-07-09 18:37:45,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051199756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:45,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958297431] [2021-07-09 18:37:45,983 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:46,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:37:46,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:46,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:37:46,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:46,114 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 18:37:46,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958297431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:46,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:46,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:37:46,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783114630] [2021-07-09 18:37:46,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:37:46,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:46,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:37:46,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:37:46,116 INFO L87 Difference]: Start difference. First operand 571 states and 1508 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:46,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:46,225 INFO L93 Difference]: Finished difference Result 752 states and 1956 transitions. [2021-07-09 18:37:46,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:37:46,225 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:37:46,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:46,227 INFO L225 Difference]: With dead ends: 752 [2021-07-09 18:37:46,228 INFO L226 Difference]: Without dead ends: 715 [2021-07-09 18:37:46,228 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:37:46,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-07-09 18:37:46,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 559. [2021-07-09 18:37:46,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 2.6415770609319) internal successors, (1474), 558 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:46,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1474 transitions. [2021-07-09 18:37:46,236 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1474 transitions. Word has length 28 [2021-07-09 18:37:46,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:46,236 INFO L482 AbstractCegarLoop]: Abstraction has 559 states and 1474 transitions. [2021-07-09 18:37:46,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:46,236 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1474 transitions. [2021-07-09 18:37:46,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:37:46,237 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:46,237 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, 1, 1, 1, 1] [2021-07-09 18:37:46,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:46,453 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:46,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:46,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1557867328, now seen corresponding path program 13 times [2021-07-09 18:37:46,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:46,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18923084] [2021-07-09 18:37:46,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:46,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:46,512 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 18:37:46,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:46,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18923084] [2021-07-09 18:37:46,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18923084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:46,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967044112] [2021-07-09 18:37:46,513 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:46,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:46,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:37:46,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:46,610 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 18:37:46,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967044112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:46,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:46,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-07-09 18:37:46,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756449689] [2021-07-09 18:37:46,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:37:46,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:46,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:37:46,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:37:46,611 INFO L87 Difference]: Start difference. First operand 559 states and 1474 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:46,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:46,666 INFO L93 Difference]: Finished difference Result 718 states and 1889 transitions. [2021-07-09 18:37:46,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:37:46,666 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:37:46,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:46,668 INFO L225 Difference]: With dead ends: 718 [2021-07-09 18:37:46,669 INFO L226 Difference]: Without dead ends: 681 [2021-07-09 18:37:46,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:37:46,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-07-09 18:37:46,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 629. [2021-07-09 18:37:46,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 2.676751592356688) internal successors, (1681), 628 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:46,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1681 transitions. [2021-07-09 18:37:46,677 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1681 transitions. Word has length 28 [2021-07-09 18:37:46,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:46,677 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 1681 transitions. [2021-07-09 18:37:46,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:46,677 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1681 transitions. [2021-07-09 18:37:46,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:37:46,678 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:46,678 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, 1, 1, 1, 1] [2021-07-09 18:37:46,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:46,895 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:46,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:46,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1676950340, now seen corresponding path program 14 times [2021-07-09 18:37:46,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:46,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876306169] [2021-07-09 18:37:46,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:46,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:46,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:37:46,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:46,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876306169] [2021-07-09 18:37:46,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876306169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:46,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395289028] [2021-07-09 18:37:46,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:37:46,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:37:46,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:46,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:37:46,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:47,059 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 18:37:47,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395289028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:47,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:47,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-07-09 18:37:47,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709502680] [2021-07-09 18:37:47,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:37:47,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:47,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:37:47,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:37:47,060 INFO L87 Difference]: Start difference. First operand 629 states and 1681 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:47,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:47,133 INFO L93 Difference]: Finished difference Result 722 states and 1896 transitions. [2021-07-09 18:37:47,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:37:47,133 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:37:47,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:47,136 INFO L225 Difference]: With dead ends: 722 [2021-07-09 18:37:47,136 INFO L226 Difference]: Without dead ends: 682 [2021-07-09 18:37:47,136 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 76.0ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:37:47,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-07-09 18:37:47,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 573. [2021-07-09 18:37:47,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.645104895104895) internal successors, (1513), 572 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:47,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1513 transitions. [2021-07-09 18:37:47,145 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1513 transitions. Word has length 28 [2021-07-09 18:37:47,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:47,145 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1513 transitions. [2021-07-09 18:37:47,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:47,145 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1513 transitions. [2021-07-09 18:37:47,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:37:47,146 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:47,146 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, 1, 1, 1, 1] [2021-07-09 18:37:47,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-07-09 18:37:47,353 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:47,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:47,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1532662758, now seen corresponding path program 15 times [2021-07-09 18:37:47,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:47,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879993665] [2021-07-09 18:37:47,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:47,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:47,428 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 18:37:47,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:47,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879993665] [2021-07-09 18:37:47,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879993665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:47,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226910285] [2021-07-09 18:37:47,428 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 18:37:47,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:37:47,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:47,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:37:47,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:47,578 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 18:37:47,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226910285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:47,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:47,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-09 18:37:47,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74410245] [2021-07-09 18:37:47,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:37:47,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:47,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:37:47,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:37:47,579 INFO L87 Difference]: Start difference. First operand 573 states and 1513 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 18:37:47,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:47,734 INFO L93 Difference]: Finished difference Result 800 states and 2048 transitions. [2021-07-09 18:37:47,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:37:47,734 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 28 [2021-07-09 18:37:47,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:47,737 INFO L225 Difference]: With dead ends: 800 [2021-07-09 18:37:47,737 INFO L226 Difference]: Without dead ends: 762 [2021-07-09 18:37:47,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:37:47,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-07-09 18:37:47,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 543. [2021-07-09 18:37:47,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 2.6457564575645756) internal successors, (1434), 542 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:47,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1434 transitions. [2021-07-09 18:37:47,746 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1434 transitions. Word has length 28 [2021-07-09 18:37:47,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:47,746 INFO L482 AbstractCegarLoop]: Abstraction has 543 states and 1434 transitions. [2021-07-09 18:37:47,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 18:37:47,746 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1434 transitions. [2021-07-09 18:37:47,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:37:47,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:47,748 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:47,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-09 18:37:47,948 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:47,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:47,948 INFO L82 PathProgramCache]: Analyzing trace with hash 489628624, now seen corresponding path program 16 times [2021-07-09 18:37:47,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:47,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70835721] [2021-07-09 18:37:47,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:47,970 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 18:37:47,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:47,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70835721] [2021-07-09 18:37:47,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70835721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:47,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48076055] [2021-07-09 18:37:47,970 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 18:37:47,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:37:47,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:47,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:37:47,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:48,079 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 18:37:48,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48076055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:48,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:48,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 18:37:48,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754412654] [2021-07-09 18:37:48,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:37:48,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:48,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:37:48,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:37:48,081 INFO L87 Difference]: Start difference. First operand 543 states and 1434 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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 18:37:48,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:48,285 INFO L93 Difference]: Finished difference Result 1421 states and 3594 transitions. [2021-07-09 18:37:48,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:37:48,285 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:37:48,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:48,289 INFO L225 Difference]: With dead ends: 1421 [2021-07-09 18:37:48,289 INFO L226 Difference]: Without dead ends: 1421 [2021-07-09 18:37:48,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 127.1ms TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:37:48,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2021-07-09 18:37:48,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 689. [2021-07-09 18:37:48,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 688 states have (on average 2.7107558139534884) internal successors, (1865), 688 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:48,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1865 transitions. [2021-07-09 18:37:48,302 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1865 transitions. Word has length 31 [2021-07-09 18:37:48,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:48,303 INFO L482 AbstractCegarLoop]: Abstraction has 689 states and 1865 transitions. [2021-07-09 18:37:48,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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 18:37:48,303 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1865 transitions. [2021-07-09 18:37:48,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:37:48,304 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:48,304 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:48,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-09 18:37:48,515 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:48,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:48,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1586150698, now seen corresponding path program 17 times [2021-07-09 18:37:48,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:48,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560870026] [2021-07-09 18:37:48,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:48,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:48,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:48,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560870026] [2021-07-09 18:37:48,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560870026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:48,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613780000] [2021-07-09 18:37:48,570 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 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 18:37:48,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:37:48,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:48,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:37:48,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:48,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:48,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613780000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:48,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:48,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 18:37:48,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048299477] [2021-07-09 18:37:48,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:37:48,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:48,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:37:48,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:37:48,665 INFO L87 Difference]: Start difference. First operand 689 states and 1865 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:48,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:48,843 INFO L93 Difference]: Finished difference Result 1816 states and 4728 transitions. [2021-07-09 18:37:48,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:37:48,844 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:37:48,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:48,849 INFO L225 Difference]: With dead ends: 1816 [2021-07-09 18:37:48,849 INFO L226 Difference]: Without dead ends: 1762 [2021-07-09 18:37:48,850 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 156.9ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:37:48,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1762 states. [2021-07-09 18:37:48,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1762 to 911. [2021-07-09 18:37:48,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 2.767032967032967) internal successors, (2518), 910 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:48,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 2518 transitions. [2021-07-09 18:37:48,868 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 2518 transitions. Word has length 31 [2021-07-09 18:37:48,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:48,868 INFO L482 AbstractCegarLoop]: Abstraction has 911 states and 2518 transitions. [2021-07-09 18:37:48,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:48,868 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 2518 transitions. [2021-07-09 18:37:48,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:37:48,869 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:48,869 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:49,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 18:37:49,085 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:49,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:49,085 INFO L82 PathProgramCache]: Analyzing trace with hash 2002810338, now seen corresponding path program 18 times [2021-07-09 18:37:49,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:49,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899230356] [2021-07-09 18:37:49,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:49,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:49,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:49,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899230356] [2021-07-09 18:37:49,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899230356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:49,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702890244] [2021-07-09 18:37:49,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:49,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:37:49,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:49,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:37:49,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:49,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:49,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702890244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:49,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:49,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 18:37:49,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033405527] [2021-07-09 18:37:49,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:37:49,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:49,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:37:49,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:37:49,211 INFO L87 Difference]: Start difference. First operand 911 states and 2518 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:49,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:49,422 INFO L93 Difference]: Finished difference Result 2384 states and 6254 transitions. [2021-07-09 18:37:49,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:37:49,422 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:37:49,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:49,433 INFO L225 Difference]: With dead ends: 2384 [2021-07-09 18:37:49,433 INFO L226 Difference]: Without dead ends: 2384 [2021-07-09 18:37:49,434 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 121.2ms TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:37:49,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-07-09 18:37:49,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 1348. [2021-07-09 18:37:49,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1347 states have (on average 2.834446919079436) internal successors, (3818), 1347 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:49,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 3818 transitions. [2021-07-09 18:37:49,460 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 3818 transitions. Word has length 31 [2021-07-09 18:37:49,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:49,460 INFO L482 AbstractCegarLoop]: Abstraction has 1348 states and 3818 transitions. [2021-07-09 18:37:49,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:49,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 3818 transitions. [2021-07-09 18:37:49,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:37:49,462 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:49,462 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:49,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-09 18:37:49,669 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:49,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:49,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1625839184, now seen corresponding path program 19 times [2021-07-09 18:37:49,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:49,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868204502] [2021-07-09 18:37:49,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:49,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:49,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:49,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868204502] [2021-07-09 18:37:49,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868204502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:49,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723875329] [2021-07-09 18:37:49,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:49,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:49,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:37:49,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:49,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:49,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723875329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:49,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:49,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 18:37:49,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397270252] [2021-07-09 18:37:49,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:37:49,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:49,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:37:49,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:37:49,780 INFO L87 Difference]: Start difference. First operand 1348 states and 3818 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:49,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:49,914 INFO L93 Difference]: Finished difference Result 1975 states and 5312 transitions. [2021-07-09 18:37:49,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:37:49,914 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:37:49,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:49,918 INFO L225 Difference]: With dead ends: 1975 [2021-07-09 18:37:49,918 INFO L226 Difference]: Without dead ends: 1961 [2021-07-09 18:37:49,918 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:37:49,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-07-09 18:37:49,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1355. [2021-07-09 18:37:49,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1354 states have (on average 2.826440177252585) internal successors, (3827), 1354 states have internal predecessors, (3827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:49,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 3827 transitions. [2021-07-09 18:37:49,942 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 3827 transitions. Word has length 31 [2021-07-09 18:37:49,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:49,942 INFO L482 AbstractCegarLoop]: Abstraction has 1355 states and 3827 transitions. [2021-07-09 18:37:49,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:49,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 3827 transitions. [2021-07-09 18:37:49,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:37:49,944 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:49,944 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:50,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:50,160 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:50,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:50,160 INFO L82 PathProgramCache]: Analyzing trace with hash 263951710, now seen corresponding path program 20 times [2021-07-09 18:37:50,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:50,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096088964] [2021-07-09 18:37:50,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:50,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:50,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:37:50,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:50,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096088964] [2021-07-09 18:37:50,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096088964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:50,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916144157] [2021-07-09 18:37:50,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:50,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:37:50,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:50,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:37:50,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:50,297 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 18:37:50,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916144157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:50,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:50,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 18:37:50,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39148098] [2021-07-09 18:37:50,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:37:50,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:50,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:37:50,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:37:50,298 INFO L87 Difference]: Start difference. First operand 1355 states and 3827 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:50,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:50,481 INFO L93 Difference]: Finished difference Result 2619 states and 7016 transitions. [2021-07-09 18:37:50,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:37:50,482 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:37:50,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:50,487 INFO L225 Difference]: With dead ends: 2619 [2021-07-09 18:37:50,487 INFO L226 Difference]: Without dead ends: 2619 [2021-07-09 18:37:50,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:37:50,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2619 states. [2021-07-09 18:37:50,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2619 to 1783. [2021-07-09 18:37:50,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 2.8434343434343434) internal successors, (5067), 1782 states have internal predecessors, (5067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:50,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 5067 transitions. [2021-07-09 18:37:50,527 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 5067 transitions. Word has length 31 [2021-07-09 18:37:50,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:50,528 INFO L482 AbstractCegarLoop]: Abstraction has 1783 states and 5067 transitions. [2021-07-09 18:37:50,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:50,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 5067 transitions. [2021-07-09 18:37:50,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:37:50,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:50,530 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:50,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-09 18:37:50,747 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:50,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:50,747 INFO L82 PathProgramCache]: Analyzing trace with hash 53254664, now seen corresponding path program 21 times [2021-07-09 18:37:50,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:50,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48763036] [2021-07-09 18:37:50,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:50,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:37:50,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:50,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48763036] [2021-07-09 18:37:50,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48763036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:50,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546112889] [2021-07-09 18:37:50,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:50,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:37:50,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:50,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:37:50,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:50,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:50,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546112889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:50,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:50,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 18:37:50,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63474354] [2021-07-09 18:37:50,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:37:50,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:50,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:37:50,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:37:50,867 INFO L87 Difference]: Start difference. First operand 1783 states and 5067 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:51,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:51,014 INFO L93 Difference]: Finished difference Result 2576 states and 7002 transitions. [2021-07-09 18:37:51,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:37:51,014 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:37:51,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:51,019 INFO L225 Difference]: With dead ends: 2576 [2021-07-09 18:37:51,019 INFO L226 Difference]: Without dead ends: 2564 [2021-07-09 18:37:51,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:37:51,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2564 states. [2021-07-09 18:37:51,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2564 to 1973. [2021-07-09 18:37:51,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1973 states, 1972 states have (on average 2.859026369168357) internal successors, (5638), 1972 states have internal predecessors, (5638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:51,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 5638 transitions. [2021-07-09 18:37:51,057 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 5638 transitions. Word has length 31 [2021-07-09 18:37:51,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:51,057 INFO L482 AbstractCegarLoop]: Abstraction has 1973 states and 5638 transitions. [2021-07-09 18:37:51,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:51,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 5638 transitions. [2021-07-09 18:37:51,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:37:51,060 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:51,060 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:51,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:51,277 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:51,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:51,277 INFO L82 PathProgramCache]: Analyzing trace with hash 405035328, now seen corresponding path program 22 times [2021-07-09 18:37:51,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:51,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043102642] [2021-07-09 18:37:51,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:51,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:51,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:51,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:51,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043102642] [2021-07-09 18:37:51,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043102642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:51,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30586957] [2021-07-09 18:37:51,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:51,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:37:51,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:51,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:37:51,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:51,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:51,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30586957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:51,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:51,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 18:37:51,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441329186] [2021-07-09 18:37:51,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:37:51,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:51,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:37:51,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:37:51,379 INFO L87 Difference]: Start difference. First operand 1973 states and 5638 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:51,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:51,523 INFO L93 Difference]: Finished difference Result 2743 states and 7432 transitions. [2021-07-09 18:37:51,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:37:51,523 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:37:51,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:51,528 INFO L225 Difference]: With dead ends: 2743 [2021-07-09 18:37:51,528 INFO L226 Difference]: Without dead ends: 2729 [2021-07-09 18:37:51,528 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:37:51,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2021-07-09 18:37:51,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 1973. [2021-07-09 18:37:51,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1973 states, 1972 states have (on average 2.849898580121704) internal successors, (5620), 1972 states have internal predecessors, (5620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:51,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 5620 transitions. [2021-07-09 18:37:51,561 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 5620 transitions. Word has length 31 [2021-07-09 18:37:51,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:51,561 INFO L482 AbstractCegarLoop]: Abstraction has 1973 states and 5620 transitions. [2021-07-09 18:37:51,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:51,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 5620 transitions. [2021-07-09 18:37:51,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:37:51,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:51,564 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:51,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 18:37:51,777 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:51,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:51,777 INFO L82 PathProgramCache]: Analyzing trace with hash 489434102, now seen corresponding path program 23 times [2021-07-09 18:37:51,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:51,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112460507] [2021-07-09 18:37:51,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:51,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:51,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:51,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:51,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112460507] [2021-07-09 18:37:51,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112460507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:51,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622787961] [2021-07-09 18:37:51,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:51,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:37:51,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:51,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:37:51,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:51,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:51,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622787961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:51,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:51,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 18:37:51,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384612672] [2021-07-09 18:37:51,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:37:51,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:51,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:37:51,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:37:51,893 INFO L87 Difference]: Start difference. First operand 1973 states and 5620 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 18:37:52,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:52,065 INFO L93 Difference]: Finished difference Result 2813 states and 7678 transitions. [2021-07-09 18:37:52,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:37:52,066 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 31 [2021-07-09 18:37:52,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:52,071 INFO L225 Difference]: With dead ends: 2813 [2021-07-09 18:37:52,071 INFO L226 Difference]: Without dead ends: 2757 [2021-07-09 18:37:52,071 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:37:52,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2757 states. [2021-07-09 18:37:52,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2757 to 2129. [2021-07-09 18:37:52,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2129 states, 2128 states have (on average 2.8482142857142856) internal successors, (6061), 2128 states have internal predecessors, (6061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:52,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2129 states to 2129 states and 6061 transitions. [2021-07-09 18:37:52,105 INFO L78 Accepts]: Start accepts. Automaton has 2129 states and 6061 transitions. Word has length 31 [2021-07-09 18:37:52,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:52,105 INFO L482 AbstractCegarLoop]: Abstraction has 2129 states and 6061 transitions. [2021-07-09 18:37:52,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 18:37:52,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2129 states and 6061 transitions. [2021-07-09 18:37:52,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:37:52,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:52,108 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:52,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:52,330 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:52,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:52,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1917586888, now seen corresponding path program 24 times [2021-07-09 18:37:52,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:52,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040620851] [2021-07-09 18:37:52,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:52,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:52,352 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 18:37:52,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:52,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040620851] [2021-07-09 18:37:52,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040620851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:52,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816982471] [2021-07-09 18:37:52,353 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 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 18:37:52,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:37:52,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:52,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:37:52,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:52,455 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 18:37:52,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816982471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:52,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:52,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:37:52,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667011219] [2021-07-09 18:37:52,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:37:52,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:52,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:37:52,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:37:52,456 INFO L87 Difference]: Start difference. First operand 2129 states and 6061 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:52,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:52,651 INFO L93 Difference]: Finished difference Result 3600 states and 9716 transitions. [2021-07-09 18:37:52,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:37:52,652 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:37:52,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:52,659 INFO L225 Difference]: With dead ends: 3600 [2021-07-09 18:37:52,659 INFO L226 Difference]: Without dead ends: 3600 [2021-07-09 18:37:52,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 133.5ms TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:37:52,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3600 states. [2021-07-09 18:37:52,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3600 to 2306. [2021-07-09 18:37:52,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 2.8620390455531455) internal successors, (6597), 2305 states have internal predecessors, (6597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:52,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 6597 transitions. [2021-07-09 18:37:52,702 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 6597 transitions. Word has length 31 [2021-07-09 18:37:52,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:52,702 INFO L482 AbstractCegarLoop]: Abstraction has 2306 states and 6597 transitions. [2021-07-09 18:37:52,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:52,702 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 6597 transitions. [2021-07-09 18:37:52,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:37:52,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:52,705 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:52,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-07-09 18:37:52,921 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:52,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:52,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1706889842, now seen corresponding path program 25 times [2021-07-09 18:37:52,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:52,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273206701] [2021-07-09 18:37:52,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:52,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:52,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:52,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:52,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273206701] [2021-07-09 18:37:52,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273206701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:52,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432941918] [2021-07-09 18:37:52,949 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 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 18:37:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:52,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:37:52,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:53,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:53,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432941918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:53,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:53,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:37:53,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855419010] [2021-07-09 18:37:53,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:37:53,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:53,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:37:53,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:37:53,033 INFO L87 Difference]: Start difference. First operand 2306 states and 6597 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:53,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:53,209 INFO L93 Difference]: Finished difference Result 3297 states and 9029 transitions. [2021-07-09 18:37:53,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:37:53,209 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:37:53,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:53,214 INFO L225 Difference]: With dead ends: 3297 [2021-07-09 18:37:53,214 INFO L226 Difference]: Without dead ends: 3285 [2021-07-09 18:37:53,214 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 115.5ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:37:53,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3285 states. [2021-07-09 18:37:53,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3285 to 2306. [2021-07-09 18:37:53,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 2.8603036876355747) internal successors, (6593), 2305 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:53,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 6593 transitions. [2021-07-09 18:37:53,250 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 6593 transitions. Word has length 31 [2021-07-09 18:37:53,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:53,251 INFO L482 AbstractCegarLoop]: Abstraction has 2306 states and 6593 transitions. [2021-07-09 18:37:53,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:53,251 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 6593 transitions. [2021-07-09 18:37:53,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:37:53,254 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:53,254 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:53,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:53,469 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:53,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:53,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1859325636, now seen corresponding path program 26 times [2021-07-09 18:37:53,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:53,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760126958] [2021-07-09 18:37:53,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:53,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:53,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:53,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760126958] [2021-07-09 18:37:53,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760126958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:53,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118006845] [2021-07-09 18:37:53,492 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 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 18:37:53,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:37:53,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:53,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:37:53,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:53,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:53,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118006845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:53,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:53,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:37:53,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027680021] [2021-07-09 18:37:53,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:37:53,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:53,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:37:53,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:37:53,570 INFO L87 Difference]: Start difference. First operand 2306 states and 6593 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:53,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:53,788 INFO L93 Difference]: Finished difference Result 3570 states and 9670 transitions. [2021-07-09 18:37:53,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:37:53,789 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:37:53,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:53,794 INFO L225 Difference]: With dead ends: 3570 [2021-07-09 18:37:53,794 INFO L226 Difference]: Without dead ends: 3563 [2021-07-09 18:37:53,794 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 143.2ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:37:53,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2021-07-09 18:37:53,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 2380. [2021-07-09 18:37:53,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2380 states, 2379 states have (on average 2.851618327028163) internal successors, (6784), 2379 states have internal predecessors, (6784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:53,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 6784 transitions. [2021-07-09 18:37:53,859 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 6784 transitions. Word has length 31 [2021-07-09 18:37:53,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:53,861 INFO L482 AbstractCegarLoop]: Abstraction has 2380 states and 6784 transitions. [2021-07-09 18:37:53,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:53,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 6784 transitions. [2021-07-09 18:37:53,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:37:53,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:53,865 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:54,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-07-09 18:37:54,065 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:54,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:54,066 INFO L82 PathProgramCache]: Analyzing trace with hash 2058670506, now seen corresponding path program 27 times [2021-07-09 18:37:54,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:54,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755950545] [2021-07-09 18:37:54,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:54,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:54,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:54,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:54,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755950545] [2021-07-09 18:37:54,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755950545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:54,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042470266] [2021-07-09 18:37:54,088 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 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 18:37:54,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:37:54,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:54,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:37:54,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:54,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:54,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042470266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:54,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:54,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:37:54,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617068504] [2021-07-09 18:37:54,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:37:54,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:54,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:37:54,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:37:54,166 INFO L87 Difference]: Start difference. First operand 2380 states and 6784 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:54,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:54,345 INFO L93 Difference]: Finished difference Result 3591 states and 9701 transitions. [2021-07-09 18:37:54,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:37:54,345 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:37:54,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:54,350 INFO L225 Difference]: With dead ends: 3591 [2021-07-09 18:37:54,350 INFO L226 Difference]: Without dead ends: 3577 [2021-07-09 18:37:54,350 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 110.2ms TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:37:54,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3577 states. [2021-07-09 18:37:54,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3577 to 2306. [2021-07-09 18:37:54,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 2.8412147505422993) internal successors, (6549), 2305 states have internal predecessors, (6549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:54,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 6549 transitions. [2021-07-09 18:37:54,387 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 6549 transitions. Word has length 31 [2021-07-09 18:37:54,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:54,387 INFO L482 AbstractCegarLoop]: Abstraction has 2306 states and 6549 transitions. [2021-07-09 18:37:54,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:54,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 6549 transitions. [2021-07-09 18:37:54,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:37:54,391 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:54,391 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:54,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:54,605 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:54,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:54,605 INFO L82 PathProgramCache]: Analyzing trace with hash 2143069280, now seen corresponding path program 28 times [2021-07-09 18:37:54,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:54,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263826357] [2021-07-09 18:37:54,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:54,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:54,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:54,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263826357] [2021-07-09 18:37:54,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263826357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:54,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219383596] [2021-07-09 18:37:54,628 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 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 18:37:54,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:37:54,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:54,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:37:54,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:54,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:54,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219383596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:54,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:54,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:37:54,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871730105] [2021-07-09 18:37:54,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:37:54,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:54,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:37:54,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:37:54,707 INFO L87 Difference]: Start difference. First operand 2306 states and 6549 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:54,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:54,851 INFO L93 Difference]: Finished difference Result 3174 states and 8705 transitions. [2021-07-09 18:37:54,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:37:54,851 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:37:54,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:54,855 INFO L225 Difference]: With dead ends: 3174 [2021-07-09 18:37:54,855 INFO L226 Difference]: Without dead ends: 3146 [2021-07-09 18:37:54,855 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:37:54,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3146 states. [2021-07-09 18:37:54,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3146 to 2306. [2021-07-09 18:37:54,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 2.836008676789588) internal successors, (6537), 2305 states have internal predecessors, (6537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:54,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 6537 transitions. [2021-07-09 18:37:54,891 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 6537 transitions. Word has length 31 [2021-07-09 18:37:54,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:54,891 INFO L482 AbstractCegarLoop]: Abstraction has 2306 states and 6537 transitions. [2021-07-09 18:37:54,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:54,891 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 6537 transitions. [2021-07-09 18:37:54,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:37:54,895 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:54,895 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:55,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-09 18:37:55,101 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:55,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:55,101 INFO L82 PathProgramCache]: Analyzing trace with hash -187022174, now seen corresponding path program 29 times [2021-07-09 18:37:55,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:55,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26800563] [2021-07-09 18:37:55,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:55,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:55,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:55,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:55,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26800563] [2021-07-09 18:37:55,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26800563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:55,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629484461] [2021-07-09 18:37:55,122 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:37:55,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:37:55,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:55,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:37:55,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:55,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:55,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629484461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:55,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:55,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 18:37:55,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364158099] [2021-07-09 18:37:55,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:37:55,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:55,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:37:55,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:37:55,195 INFO L87 Difference]: Start difference. First operand 2306 states and 6537 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:55,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:55,310 INFO L93 Difference]: Finished difference Result 2920 states and 8110 transitions. [2021-07-09 18:37:55,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:37:55,311 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:37:55,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:55,314 INFO L225 Difference]: With dead ends: 2920 [2021-07-09 18:37:55,314 INFO L226 Difference]: Without dead ends: 2920 [2021-07-09 18:37:55,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:37:55,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2920 states. [2021-07-09 18:37:55,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2920 to 2241. [2021-07-09 18:37:55,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2240 states have (on average 2.8401785714285714) internal successors, (6362), 2240 states have internal predecessors, (6362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:55,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 6362 transitions. [2021-07-09 18:37:55,346 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 6362 transitions. Word has length 31 [2021-07-09 18:37:55,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:55,346 INFO L482 AbstractCegarLoop]: Abstraction has 2241 states and 6362 transitions. [2021-07-09 18:37:55,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:55,346 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 6362 transitions. [2021-07-09 18:37:55,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:37:55,349 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:55,349 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:55,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-09 18:37:55,566 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:55,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:55,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1705952112, now seen corresponding path program 30 times [2021-07-09 18:37:55,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:55,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705139313] [2021-07-09 18:37:55,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:55,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:55,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:55,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705139313] [2021-07-09 18:37:55,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705139313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:55,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082358068] [2021-07-09 18:37:55,586 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 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 18:37:55,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:37:55,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:55,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:37:55,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:55,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:55,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082358068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:55,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:55,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 18:37:55,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519008182] [2021-07-09 18:37:55,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:37:55,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:55,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:37:55,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:37:55,674 INFO L87 Difference]: Start difference. First operand 2241 states and 6362 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:55,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:55,767 INFO L93 Difference]: Finished difference Result 2879 states and 8010 transitions. [2021-07-09 18:37:55,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:37:55,767 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:37:55,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:55,771 INFO L225 Difference]: With dead ends: 2879 [2021-07-09 18:37:55,771 INFO L226 Difference]: Without dead ends: 2834 [2021-07-09 18:37:55,772 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:37:55,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2021-07-09 18:37:55,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 2241. [2021-07-09 18:37:55,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2240 states have (on average 2.8370535714285716) internal successors, (6355), 2240 states have internal predecessors, (6355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:55,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 6355 transitions. [2021-07-09 18:37:55,811 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 6355 transitions. Word has length 31 [2021-07-09 18:37:55,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:55,812 INFO L482 AbstractCegarLoop]: Abstraction has 2241 states and 6355 transitions. [2021-07-09 18:37:55,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:55,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 6355 transitions. [2021-07-09 18:37:55,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:37:55,815 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:55,816 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:56,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-09 18:37:56,021 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:56,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:56,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1126224482, now seen corresponding path program 31 times [2021-07-09 18:37:56,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:56,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019350757] [2021-07-09 18:37:56,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:56,047 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 18:37:56,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:56,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019350757] [2021-07-09 18:37:56,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019350757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:56,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665063514] [2021-07-09 18:37:56,048 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 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 18:37:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:56,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:37:56,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:56,128 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 18:37:56,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665063514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:56,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:56,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 18:37:56,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105451779] [2021-07-09 18:37:56,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:37:56,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:56,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:37:56,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:37:56,129 INFO L87 Difference]: Start difference. First operand 2241 states and 6355 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:56,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:56,222 INFO L93 Difference]: Finished difference Result 2749 states and 7653 transitions. [2021-07-09 18:37:56,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:37:56,223 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:37:56,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:56,226 INFO L225 Difference]: With dead ends: 2749 [2021-07-09 18:37:56,226 INFO L226 Difference]: Without dead ends: 2749 [2021-07-09 18:37:56,226 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:37:56,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2749 states. [2021-07-09 18:37:56,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2749 to 2283. [2021-07-09 18:37:56,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2283 states, 2282 states have (on average 2.837861524978089) internal successors, (6476), 2282 states have internal predecessors, (6476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:56,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 6476 transitions. [2021-07-09 18:37:56,255 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 6476 transitions. Word has length 31 [2021-07-09 18:37:56,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:56,256 INFO L482 AbstractCegarLoop]: Abstraction has 2283 states and 6476 transitions. [2021-07-09 18:37:56,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:56,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 6476 transitions. [2021-07-09 18:37:56,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:37:56,259 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:56,259 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:56,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-09 18:37:56,475 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:56,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:56,475 INFO L82 PathProgramCache]: Analyzing trace with hash -267703438, now seen corresponding path program 32 times [2021-07-09 18:37:56,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:56,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425119843] [2021-07-09 18:37:56,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:56,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:56,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:56,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:56,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425119843] [2021-07-09 18:37:56,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425119843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:56,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556942596] [2021-07-09 18:37:56,495 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 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 18:37:56,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:37:56,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:56,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:37:56,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:56,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:56,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556942596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:56,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:56,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 18:37:56,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816056972] [2021-07-09 18:37:56,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:37:56,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:56,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:37:56,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:37:56,577 INFO L87 Difference]: Start difference. First operand 2283 states and 6476 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:56,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:56,657 INFO L93 Difference]: Finished difference Result 2968 states and 8247 transitions. [2021-07-09 18:37:56,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:37:56,657 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:37:56,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:56,661 INFO L225 Difference]: With dead ends: 2968 [2021-07-09 18:37:56,661 INFO L226 Difference]: Without dead ends: 2932 [2021-07-09 18:37:56,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:37:56,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2932 states. [2021-07-09 18:37:56,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2932 to 2283. [2021-07-09 18:37:56,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2283 states, 2282 states have (on average 2.8352322524101665) internal successors, (6470), 2282 states have internal predecessors, (6470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:56,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 6470 transitions. [2021-07-09 18:37:56,689 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 6470 transitions. Word has length 31 [2021-07-09 18:37:56,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:56,689 INFO L482 AbstractCegarLoop]: Abstraction has 2283 states and 6470 transitions. [2021-07-09 18:37:56,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:56,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 6470 transitions. [2021-07-09 18:37:56,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:37:56,692 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:56,704 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:56,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-09 18:37:56,909 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:56,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:56,909 INFO L82 PathProgramCache]: Analyzing trace with hash 979746500, now seen corresponding path program 33 times [2021-07-09 18:37:56,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:56,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394301055] [2021-07-09 18:37:56,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:56,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:56,931 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 18:37:56,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:56,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394301055] [2021-07-09 18:37:56,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394301055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:56,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407432763] [2021-07-09 18:37:56,931 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 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 18:37:56,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:37:56,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:56,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:37:56,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:57,010 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 18:37:57,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407432763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:57,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:57,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:37:57,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081730052] [2021-07-09 18:37:57,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:37:57,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:57,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:37:57,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:37:57,012 INFO L87 Difference]: Start difference. First operand 2283 states and 6470 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:57,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:57,147 INFO L93 Difference]: Finished difference Result 2886 states and 7982 transitions. [2021-07-09 18:37:57,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:37:57,147 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:37:57,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:57,152 INFO L225 Difference]: With dead ends: 2886 [2021-07-09 18:37:57,152 INFO L226 Difference]: Without dead ends: 2886 [2021-07-09 18:37:57,153 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:37:57,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2886 states. [2021-07-09 18:37:57,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2886 to 2463. [2021-07-09 18:37:57,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 2462 states have (on average 2.8399675060926075) internal successors, (6992), 2462 states have internal predecessors, (6992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:57,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 6992 transitions. [2021-07-09 18:37:57,192 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 6992 transitions. Word has length 31 [2021-07-09 18:37:57,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:57,192 INFO L482 AbstractCegarLoop]: Abstraction has 2463 states and 6992 transitions. [2021-07-09 18:37:57,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:57,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 6992 transitions. [2021-07-09 18:37:57,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:37:57,197 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:57,197 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:57,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:57,401 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:57,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:57,401 INFO L82 PathProgramCache]: Analyzing trace with hash -948731430, now seen corresponding path program 34 times [2021-07-09 18:37:57,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:57,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525513736] [2021-07-09 18:37:57,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:57,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:57,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:57,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525513736] [2021-07-09 18:37:57,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525513736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:57,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032471584] [2021-07-09 18:37:57,424 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 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 18:37:57,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:37:57,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:57,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:37:57,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:57,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032471584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:57,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:57,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:37:57,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797792418] [2021-07-09 18:37:57,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:37:57,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:57,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:37:57,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:37:57,505 INFO L87 Difference]: Start difference. First operand 2463 states and 6992 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:57,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:57,648 INFO L93 Difference]: Finished difference Result 3361 states and 9214 transitions. [2021-07-09 18:37:57,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:37:57,649 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:37:57,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:57,653 INFO L225 Difference]: With dead ends: 3361 [2021-07-09 18:37:57,653 INFO L226 Difference]: Without dead ends: 3337 [2021-07-09 18:37:57,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:37:57,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3337 states. [2021-07-09 18:37:57,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3337 to 2543. [2021-07-09 18:37:57,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2543 states, 2542 states have (on average 2.841856805664831) internal successors, (7224), 2542 states have internal predecessors, (7224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:57,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2543 states to 2543 states and 7224 transitions. [2021-07-09 18:37:57,689 INFO L78 Accepts]: Start accepts. Automaton has 2543 states and 7224 transitions. Word has length 31 [2021-07-09 18:37:57,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:57,690 INFO L482 AbstractCegarLoop]: Abstraction has 2543 states and 7224 transitions. [2021-07-09 18:37:57,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:57,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2543 states and 7224 transitions. [2021-07-09 18:37:57,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:37:57,693 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:57,693 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:57,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-07-09 18:37:57,906 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:57,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:57,906 INFO L82 PathProgramCache]: Analyzing trace with hash 2013521954, now seen corresponding path program 35 times [2021-07-09 18:37:57,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:57,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006521878] [2021-07-09 18:37:57,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:57,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:57,945 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 18:37:57,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:57,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006521878] [2021-07-09 18:37:57,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006521878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:57,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111623413] [2021-07-09 18:37:57,945 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 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 18:37:57,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:37:57,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:57,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:37:57,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:58,029 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 18:37:58,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111623413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:58,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:58,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:37:58,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470193642] [2021-07-09 18:37:58,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:37:58,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:58,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:37:58,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:37:58,030 INFO L87 Difference]: Start difference. First operand 2543 states and 7224 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:58,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:58,240 INFO L93 Difference]: Finished difference Result 3726 states and 10138 transitions. [2021-07-09 18:37:58,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:37:58,240 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:37:58,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:58,245 INFO L225 Difference]: With dead ends: 3726 [2021-07-09 18:37:58,245 INFO L226 Difference]: Without dead ends: 3726 [2021-07-09 18:37:58,245 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 142.4ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:37:58,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3726 states. [2021-07-09 18:37:58,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3726 to 2713. [2021-07-09 18:37:58,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 2.864675516224189) internal successors, (7769), 2712 states have internal predecessors, (7769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:58,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7769 transitions. [2021-07-09 18:37:58,290 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7769 transitions. Word has length 31 [2021-07-09 18:37:58,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:58,290 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7769 transitions. [2021-07-09 18:37:58,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:58,290 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7769 transitions. [2021-07-09 18:37:58,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:37:58,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:58,294 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:58,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:58,501 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:58,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:58,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1802824908, now seen corresponding path program 36 times [2021-07-09 18:37:58,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:58,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125562913] [2021-07-09 18:37:58,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:58,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:58,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:58,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125562913] [2021-07-09 18:37:58,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125562913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:58,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499476816] [2021-07-09 18:37:58,524 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 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 18:37:58,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:37:58,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:58,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:37:58,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:58,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:58,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499476816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:58,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:58,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:37:58,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466273833] [2021-07-09 18:37:58,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:37:58,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:58,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:37:58,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:37:58,621 INFO L87 Difference]: Start difference. First operand 2713 states and 7769 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:58,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:58,817 INFO L93 Difference]: Finished difference Result 4042 states and 11134 transitions. [2021-07-09 18:37:58,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:37:58,818 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:37:58,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:58,834 INFO L225 Difference]: With dead ends: 4042 [2021-07-09 18:37:58,835 INFO L226 Difference]: Without dead ends: 4030 [2021-07-09 18:37:58,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 110.8ms TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:37:58,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4030 states. [2021-07-09 18:37:58,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4030 to 2949. [2021-07-09 18:37:58,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 2948 states have (on average 2.8666892808683855) internal successors, (8451), 2948 states have internal predecessors, (8451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:58,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 8451 transitions. [2021-07-09 18:37:58,876 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 8451 transitions. Word has length 31 [2021-07-09 18:37:58,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:58,876 INFO L482 AbstractCegarLoop]: Abstraction has 2949 states and 8451 transitions. [2021-07-09 18:37:58,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:58,876 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 8451 transitions. [2021-07-09 18:37:58,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:37:58,880 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:58,880 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:59,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:59,080 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:59,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:59,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1763390570, now seen corresponding path program 37 times [2021-07-09 18:37:59,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:59,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457581011] [2021-07-09 18:37:59,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:59,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:59,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:59,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:59,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457581011] [2021-07-09 18:37:59,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457581011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:59,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545089150] [2021-07-09 18:37:59,116 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 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 18:37:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:59,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:37:59,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:59,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545089150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:59,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:59,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:37:59,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039912297] [2021-07-09 18:37:59,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:37:59,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:59,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:37:59,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:37:59,209 INFO L87 Difference]: Start difference. First operand 2949 states and 8451 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:59,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:59,417 INFO L93 Difference]: Finished difference Result 4070 states and 11132 transitions. [2021-07-09 18:37:59,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:37:59,417 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:37:59,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:59,426 INFO L225 Difference]: With dead ends: 4070 [2021-07-09 18:37:59,426 INFO L226 Difference]: Without dead ends: 4070 [2021-07-09 18:37:59,426 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 142.5ms TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:37:59,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4070 states. [2021-07-09 18:37:59,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4070 to 2953. [2021-07-09 18:37:59,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2953 states, 2952 states have (on average 2.858739837398374) internal successors, (8439), 2952 states have internal predecessors, (8439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:59,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2953 states to 2953 states and 8439 transitions. [2021-07-09 18:37:59,471 INFO L78 Accepts]: Start accepts. Automaton has 2953 states and 8439 transitions. Word has length 31 [2021-07-09 18:37:59,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:59,471 INFO L482 AbstractCegarLoop]: Abstraction has 2953 states and 8439 transitions. [2021-07-09 18:37:59,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:59,471 INFO L276 IsEmpty]: Start isEmpty. Operand 2953 states and 8439 transitions. [2021-07-09 18:37:59,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:37:59,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:59,475 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:59,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:59,675 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:59,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:59,675 INFO L82 PathProgramCache]: Analyzing trace with hash -2140361724, now seen corresponding path program 38 times [2021-07-09 18:37:59,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:59,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411762167] [2021-07-09 18:37:59,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:59,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:59,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411762167] [2021-07-09 18:37:59,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411762167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:59,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125845252] [2021-07-09 18:37:59,695 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 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 18:37:59,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:37:59,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:59,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:37:59,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:59,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:59,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125845252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:59,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:59,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:37:59,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257624058] [2021-07-09 18:37:59,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:37:59,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:59,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:37:59,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:37:59,780 INFO L87 Difference]: Start difference. First operand 2953 states and 8439 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:59,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:59,959 INFO L93 Difference]: Finished difference Result 3516 states and 9756 transitions. [2021-07-09 18:37:59,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:37:59,960 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:37:59,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:59,964 INFO L225 Difference]: With dead ends: 3516 [2021-07-09 18:37:59,964 INFO L226 Difference]: Without dead ends: 3502 [2021-07-09 18:37:59,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 117.1ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:37:59,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3502 states. [2021-07-09 18:38:00,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3502 to 2953. [2021-07-09 18:38:00,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2953 states, 2952 states have (on average 2.856707317073171) internal successors, (8433), 2952 states have internal predecessors, (8433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:00,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2953 states to 2953 states and 8433 transitions. [2021-07-09 18:38:00,013 INFO L78 Accepts]: Start accepts. Automaton has 2953 states and 8433 transitions. Word has length 31 [2021-07-09 18:38:00,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:00,013 INFO L482 AbstractCegarLoop]: Abstraction has 2953 states and 8433 transitions. [2021-07-09 18:38:00,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:00,014 INFO L276 IsEmpty]: Start isEmpty. Operand 2953 states and 8433 transitions. [2021-07-09 18:38:00,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:38:00,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:00,018 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:00,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-09 18:38:00,219 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:00,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:00,219 INFO L82 PathProgramCache]: Analyzing trace with hash 157269054, now seen corresponding path program 39 times [2021-07-09 18:38:00,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:00,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426478209] [2021-07-09 18:38:00,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:00,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:00,241 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 18:38:00,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:00,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426478209] [2021-07-09 18:38:00,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426478209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:00,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598700086] [2021-07-09 18:38:00,241 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 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 18:38:00,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:38:00,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:00,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:38:00,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:00,330 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 18:38:00,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598700086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:00,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:00,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 18:38:00,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032844744] [2021-07-09 18:38:00,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:38:00,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:00,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:38:00,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:38:00,331 INFO L87 Difference]: Start difference. First operand 2953 states and 8433 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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 18:38:00,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:00,543 INFO L93 Difference]: Finished difference Result 4026 states and 11165 transitions. [2021-07-09 18:38:00,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:38:00,544 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:38:00,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:00,549 INFO L225 Difference]: With dead ends: 4026 [2021-07-09 18:38:00,549 INFO L226 Difference]: Without dead ends: 4026 [2021-07-09 18:38:00,549 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 127.9ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:38:00,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-07-09 18:38:00,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 3009. [2021-07-09 18:38:00,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3009 states, 3008 states have (on average 2.849401595744681) internal successors, (8571), 3008 states have internal predecessors, (8571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:00,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 8571 transitions. [2021-07-09 18:38:00,593 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 8571 transitions. Word has length 31 [2021-07-09 18:38:00,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:00,593 INFO L482 AbstractCegarLoop]: Abstraction has 3009 states and 8571 transitions. [2021-07-09 18:38:00,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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 18:38:00,593 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 8571 transitions. [2021-07-09 18:38:00,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:38:00,597 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:00,597 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:00,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:00,798 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:00,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:00,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1056564424, now seen corresponding path program 40 times [2021-07-09 18:38:00,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:00,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195214314] [2021-07-09 18:38:00,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:00,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:00,818 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 18:38:00,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:00,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195214314] [2021-07-09 18:38:00,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195214314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:00,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587758753] [2021-07-09 18:38:00,819 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 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 18:38:00,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:38:00,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:00,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:38:00,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:00,906 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 18:38:00,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587758753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:00,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:00,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 18:38:00,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891491425] [2021-07-09 18:38:00,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:38:00,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:00,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:38:00,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:38:00,907 INFO L87 Difference]: Start difference. First operand 3009 states and 8571 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:01,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:01,099 INFO L93 Difference]: Finished difference Result 4589 states and 12658 transitions. [2021-07-09 18:38:01,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:38:01,099 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:38:01,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:01,105 INFO L225 Difference]: With dead ends: 4589 [2021-07-09 18:38:01,105 INFO L226 Difference]: Without dead ends: 4589 [2021-07-09 18:38:01,105 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 130.9ms TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:38:01,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4589 states. [2021-07-09 18:38:01,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4589 to 3477. [2021-07-09 18:38:01,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3477 states, 3476 states have (on average 2.855868814729574) internal successors, (9927), 3476 states have internal predecessors, (9927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:01,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3477 states to 3477 states and 9927 transitions. [2021-07-09 18:38:01,159 INFO L78 Accepts]: Start accepts. Automaton has 3477 states and 9927 transitions. Word has length 31 [2021-07-09 18:38:01,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:01,159 INFO L482 AbstractCegarLoop]: Abstraction has 3477 states and 9927 transitions. [2021-07-09 18:38:01,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:01,159 INFO L276 IsEmpty]: Start isEmpty. Operand 3477 states and 9927 transitions. [2021-07-09 18:38:01,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:38:01,164 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:01,164 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:01,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:01,364 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:01,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:01,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1197648042, now seen corresponding path program 41 times [2021-07-09 18:38:01,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:01,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691544762] [2021-07-09 18:38:01,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:38:01,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:01,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691544762] [2021-07-09 18:38:01,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691544762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:01,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539450057] [2021-07-09 18:38:01,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:38:01,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:38:01,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:01,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:38:01,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:01,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:01,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539450057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:01,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:01,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 18:38:01,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455848686] [2021-07-09 18:38:01,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:38:01,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:01,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:38:01,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:38:01,473 INFO L87 Difference]: Start difference. First operand 3477 states and 9927 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:01,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:01,638 INFO L93 Difference]: Finished difference Result 4422 states and 12232 transitions. [2021-07-09 18:38:01,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:38:01,638 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:38:01,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:01,643 INFO L225 Difference]: With dead ends: 4422 [2021-07-09 18:38:01,644 INFO L226 Difference]: Without dead ends: 4408 [2021-07-09 18:38:01,644 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:38:01,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4408 states. [2021-07-09 18:38:01,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4408 to 3319. [2021-07-09 18:38:01,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3319 states, 3318 states have (on average 2.8432790837854127) internal successors, (9434), 3318 states have internal predecessors, (9434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:01,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3319 states to 3319 states and 9434 transitions. [2021-07-09 18:38:01,690 INFO L78 Accepts]: Start accepts. Automaton has 3319 states and 9434 transitions. Word has length 31 [2021-07-09 18:38:01,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:01,690 INFO L482 AbstractCegarLoop]: Abstraction has 3319 states and 9434 transitions. [2021-07-09 18:38:01,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:01,690 INFO L276 IsEmpty]: Start isEmpty. Operand 3319 states and 9434 transitions. [2021-07-09 18:38:01,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:38:01,693 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:01,694 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:01,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-09 18:38:01,894 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:01,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:01,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1282046816, now seen corresponding path program 42 times [2021-07-09 18:38:01,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:01,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007244751] [2021-07-09 18:38:01,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:01,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:01,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:01,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:01,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007244751] [2021-07-09 18:38:01,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007244751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:01,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740666657] [2021-07-09 18:38:01,917 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 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 18:38:01,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:38:01,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:01,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:38:01,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:02,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740666657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:02,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:02,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 18:38:02,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974624208] [2021-07-09 18:38:02,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:38:02,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:02,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:38:02,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:38:02,001 INFO L87 Difference]: Start difference. First operand 3319 states and 9434 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 18:38:02,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:02,167 INFO L93 Difference]: Finished difference Result 4459 states and 12431 transitions. [2021-07-09 18:38:02,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:38:02,167 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 31 [2021-07-09 18:38:02,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:02,173 INFO L225 Difference]: With dead ends: 4459 [2021-07-09 18:38:02,173 INFO L226 Difference]: Without dead ends: 4403 [2021-07-09 18:38:02,173 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 114.5ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:38:02,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4403 states. [2021-07-09 18:38:02,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4403 to 3471. [2021-07-09 18:38:02,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3471 states, 3470 states have (on average 2.844956772334294) internal successors, (9872), 3470 states have internal predecessors, (9872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:02,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3471 states to 3471 states and 9872 transitions. [2021-07-09 18:38:02,224 INFO L78 Accepts]: Start accepts. Automaton has 3471 states and 9872 transitions. Word has length 31 [2021-07-09 18:38:02,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:02,224 INFO L482 AbstractCegarLoop]: Abstraction has 3471 states and 9872 transitions. [2021-07-09 18:38:02,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 18:38:02,224 INFO L276 IsEmpty]: Start isEmpty. Operand 3471 states and 9872 transitions. [2021-07-09 18:38:02,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:38:02,229 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:02,229 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:02,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-09 18:38:02,445 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:02,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:02,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1225160768, now seen corresponding path program 43 times [2021-07-09 18:38:02,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:02,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241129390] [2021-07-09 18:38:02,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:02,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:02,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:02,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:02,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241129390] [2021-07-09 18:38:02,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241129390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:02,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481459250] [2021-07-09 18:38:02,545 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 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 18:38:02,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:02,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:38:02,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:02,748 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:02,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481459250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:02,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:02,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:38:02,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298449501] [2021-07-09 18:38:02,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:38:02,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:02,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:38:02,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:38:02,749 INFO L87 Difference]: Start difference. First operand 3471 states and 9872 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 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 18:38:02,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:02,975 INFO L93 Difference]: Finished difference Result 6285 states and 17840 transitions. [2021-07-09 18:38:02,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:38:02,976 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:38:02,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:02,986 INFO L225 Difference]: With dead ends: 6285 [2021-07-09 18:38:02,986 INFO L226 Difference]: Without dead ends: 6179 [2021-07-09 18:38:02,986 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 209.2ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:38:02,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6179 states. [2021-07-09 18:38:03,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6179 to 5621. [2021-07-09 18:38:03,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5621 states, 5620 states have (on average 2.877046263345196) internal successors, (16169), 5620 states have internal predecessors, (16169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:03,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5621 states to 5621 states and 16169 transitions. [2021-07-09 18:38:03,080 INFO L78 Accepts]: Start accepts. Automaton has 5621 states and 16169 transitions. Word has length 34 [2021-07-09 18:38:03,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:03,080 INFO L482 AbstractCegarLoop]: Abstraction has 5621 states and 16169 transitions. [2021-07-09 18:38:03,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 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 18:38:03,080 INFO L276 IsEmpty]: Start isEmpty. Operand 5621 states and 16169 transitions. [2021-07-09 18:38:03,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:38:03,087 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:03,088 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:03,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-07-09 18:38:03,293 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:03,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:03,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1195720256, now seen corresponding path program 44 times [2021-07-09 18:38:03,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:03,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437368049] [2021-07-09 18:38:03,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:03,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:03,379 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:03,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:03,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437368049] [2021-07-09 18:38:03,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437368049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:03,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152596447] [2021-07-09 18:38:03,379 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 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 18:38:03,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:38:03,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:03,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:38:03,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:03,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:03,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152596447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:03,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:03,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-07-09 18:38:03,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730033240] [2021-07-09 18:38:03,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:38:03,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:03,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:38:03,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:38:03,590 INFO L87 Difference]: Start difference. First operand 5621 states and 16169 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) 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 18:38:03,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:03,817 INFO L93 Difference]: Finished difference Result 6597 states and 18745 transitions. [2021-07-09 18:38:03,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:38:03,818 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) 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 34 [2021-07-09 18:38:03,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:03,828 INFO L225 Difference]: With dead ends: 6597 [2021-07-09 18:38:03,828 INFO L226 Difference]: Without dead ends: 6473 [2021-07-09 18:38:03,828 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 186.7ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:38:03,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6473 states. [2021-07-09 18:38:03,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6473 to 4677. [2021-07-09 18:38:03,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4677 states, 4676 states have (on average 2.854790419161677) internal successors, (13349), 4676 states have internal predecessors, (13349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:03,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4677 states to 4677 states and 13349 transitions. [2021-07-09 18:38:03,896 INFO L78 Accepts]: Start accepts. Automaton has 4677 states and 13349 transitions. Word has length 34 [2021-07-09 18:38:03,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:03,896 INFO L482 AbstractCegarLoop]: Abstraction has 4677 states and 13349 transitions. [2021-07-09 18:38:03,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) 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 18:38:03,896 INFO L276 IsEmpty]: Start isEmpty. Operand 4677 states and 13349 transitions. [2021-07-09 18:38:03,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:38:03,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:03,902 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:04,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:04,102 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:04,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:04,103 INFO L82 PathProgramCache]: Analyzing trace with hash -907305536, now seen corresponding path program 45 times [2021-07-09 18:38:04,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:04,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984535045] [2021-07-09 18:38:04,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:04,209 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:04,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:04,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984535045] [2021-07-09 18:38:04,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984535045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:04,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073707740] [2021-07-09 18:38:04,209 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 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 18:38:04,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:38:04,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:04,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:38:04,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:04,399 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:04,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073707740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:04,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:04,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-07-09 18:38:04,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097030284] [2021-07-09 18:38:04,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:38:04,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:04,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:38:04,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:38:04,400 INFO L87 Difference]: Start difference. First operand 4677 states and 13349 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) 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 18:38:04,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:04,594 INFO L93 Difference]: Finished difference Result 5786 states and 16296 transitions. [2021-07-09 18:38:04,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:38:04,595 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) 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 34 [2021-07-09 18:38:04,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:04,604 INFO L225 Difference]: With dead ends: 5786 [2021-07-09 18:38:04,604 INFO L226 Difference]: Without dead ends: 5662 [2021-07-09 18:38:04,604 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 199.2ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:38:04,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5662 states. [2021-07-09 18:38:04,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5662 to 4645. [2021-07-09 18:38:04,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4645 states, 4644 states have (on average 2.857235142118863) internal successors, (13269), 4644 states have internal predecessors, (13269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:04,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4645 states to 4645 states and 13269 transitions. [2021-07-09 18:38:04,671 INFO L78 Accepts]: Start accepts. Automaton has 4645 states and 13269 transitions. Word has length 34 [2021-07-09 18:38:04,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:04,672 INFO L482 AbstractCegarLoop]: Abstraction has 4645 states and 13269 transitions. [2021-07-09 18:38:04,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) 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 18:38:04,672 INFO L276 IsEmpty]: Start isEmpty. Operand 4645 states and 13269 transitions. [2021-07-09 18:38:04,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:38:04,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:04,677 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:04,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:04,878 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:04,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:04,878 INFO L82 PathProgramCache]: Analyzing trace with hash 513398374, now seen corresponding path program 46 times [2021-07-09 18:38:04,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:04,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803360585] [2021-07-09 18:38:04,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:04,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:04,968 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:38:04,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:04,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803360585] [2021-07-09 18:38:04,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803360585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:04,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363782211] [2021-07-09 18:38:04,969 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 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 18:38:04,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:38:04,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:04,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:38:04,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:05,164 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:05,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363782211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:05,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:05,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-07-09 18:38:05,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104636300] [2021-07-09 18:38:05,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:38:05,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:05,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:38:05,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:38:05,165 INFO L87 Difference]: Start difference. First operand 4645 states and 13269 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 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 18:38:05,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:05,449 INFO L93 Difference]: Finished difference Result 6416 states and 18276 transitions. [2021-07-09 18:38:05,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:38:05,449 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 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 34 [2021-07-09 18:38:05,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:05,461 INFO L225 Difference]: With dead ends: 6416 [2021-07-09 18:38:05,461 INFO L226 Difference]: Without dead ends: 6334 [2021-07-09 18:38:05,462 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 227.8ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:38:05,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6334 states. [2021-07-09 18:38:05,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6334 to 5431. [2021-07-09 18:38:05,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5431 states, 5430 states have (on average 2.8799263351749538) internal successors, (15638), 5430 states have internal predecessors, (15638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:05,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5431 states to 5431 states and 15638 transitions. [2021-07-09 18:38:05,549 INFO L78 Accepts]: Start accepts. Automaton has 5431 states and 15638 transitions. Word has length 34 [2021-07-09 18:38:05,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:05,549 INFO L482 AbstractCegarLoop]: Abstraction has 5431 states and 15638 transitions. [2021-07-09 18:38:05,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 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 18:38:05,549 INFO L276 IsEmpty]: Start isEmpty. Operand 5431 states and 15638 transitions. [2021-07-09 18:38:05,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:38:05,558 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:05,558 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:05,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-09 18:38:05,765 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:05,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:05,765 INFO L82 PathProgramCache]: Analyzing trace with hash 394315362, now seen corresponding path program 47 times [2021-07-09 18:38:05,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:05,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958475279] [2021-07-09 18:38:05,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:05,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:38:05,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:05,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958475279] [2021-07-09 18:38:05,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958475279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:05,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798588204] [2021-07-09 18:38:05,858 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 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 18:38:05,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:38:05,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:05,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:38:05,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:06,039 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:06,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798588204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:06,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:06,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-07-09 18:38:06,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814615181] [2021-07-09 18:38:06,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:38:06,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:06,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:38:06,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:38:06,040 INFO L87 Difference]: Start difference. First operand 5431 states and 15638 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 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 18:38:06,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:06,288 INFO L93 Difference]: Finished difference Result 6415 states and 18268 transitions. [2021-07-09 18:38:06,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:38:06,288 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 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 34 [2021-07-09 18:38:06,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:06,300 INFO L225 Difference]: With dead ends: 6415 [2021-07-09 18:38:06,300 INFO L226 Difference]: Without dead ends: 6303 [2021-07-09 18:38:06,300 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 195.7ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:38:06,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6303 states. [2021-07-09 18:38:06,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6303 to 5395. [2021-07-09 18:38:06,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5395 states, 5394 states have (on average 2.8772710418984055) internal successors, (15520), 5394 states have internal predecessors, (15520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:06,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5395 states to 5395 states and 15520 transitions. [2021-07-09 18:38:06,412 INFO L78 Accepts]: Start accepts. Automaton has 5395 states and 15520 transitions. Word has length 34 [2021-07-09 18:38:06,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:06,412 INFO L482 AbstractCegarLoop]: Abstraction has 5395 states and 15520 transitions. [2021-07-09 18:38:06,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 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 18:38:06,412 INFO L276 IsEmpty]: Start isEmpty. Operand 5395 states and 15520 transitions. [2021-07-09 18:38:06,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:38:06,419 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:06,420 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:06,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-09 18:38:06,637 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:06,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:06,637 INFO L82 PathProgramCache]: Analyzing trace with hash 538602944, now seen corresponding path program 48 times [2021-07-09 18:38:06,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:06,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596948115] [2021-07-09 18:38:06,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:06,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:06,735 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:38:06,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:06,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596948115] [2021-07-09 18:38:06,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596948115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:06,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903188910] [2021-07-09 18:38:06,736 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 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 18:38:06,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:38:06,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:06,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:38:06,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:06,914 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:06,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903188910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:06,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:06,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-07-09 18:38:06,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382787270] [2021-07-09 18:38:06,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:38:06,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:06,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:38:06,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:38:06,915 INFO L87 Difference]: Start difference. First operand 5395 states and 15520 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) 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 18:38:07,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:07,071 INFO L93 Difference]: Finished difference Result 6280 states and 17888 transitions. [2021-07-09 18:38:07,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:38:07,071 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) 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 34 [2021-07-09 18:38:07,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:07,082 INFO L225 Difference]: With dead ends: 6280 [2021-07-09 18:38:07,083 INFO L226 Difference]: Without dead ends: 6163 [2021-07-09 18:38:07,083 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 188.8ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:38:07,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6163 states. [2021-07-09 18:38:07,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6163 to 5719. [2021-07-09 18:38:07,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5719 states, 5718 states have (on average 2.8807275271073802) internal successors, (16472), 5718 states have internal predecessors, (16472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:07,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5719 states to 5719 states and 16472 transitions. [2021-07-09 18:38:07,164 INFO L78 Accepts]: Start accepts. Automaton has 5719 states and 16472 transitions. Word has length 34 [2021-07-09 18:38:07,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:07,164 INFO L482 AbstractCegarLoop]: Abstraction has 5719 states and 16472 transitions. [2021-07-09 18:38:07,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0588235294117645) 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 18:38:07,164 INFO L276 IsEmpty]: Start isEmpty. Operand 5719 states and 16472 transitions. [2021-07-09 18:38:07,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:38:07,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:07,172 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:07,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:07,381 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:07,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:07,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1538038144, now seen corresponding path program 49 times [2021-07-09 18:38:07,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:07,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898130409] [2021-07-09 18:38:07,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:07,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:07,485 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:07,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:07,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898130409] [2021-07-09 18:38:07,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898130409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:07,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797636701] [2021-07-09 18:38:07,486 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 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 18:38:07,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:07,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:38:07,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:07,686 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:07,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797636701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:07,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:07,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:38:07,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276705049] [2021-07-09 18:38:07,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:38:07,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:07,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:38:07,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:38:07,687 INFO L87 Difference]: Start difference. First operand 5719 states and 16472 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 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 18:38:07,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:07,922 INFO L93 Difference]: Finished difference Result 6297 states and 17905 transitions. [2021-07-09 18:38:07,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:38:07,923 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:38:07,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:07,933 INFO L225 Difference]: With dead ends: 6297 [2021-07-09 18:38:07,933 INFO L226 Difference]: Without dead ends: 6221 [2021-07-09 18:38:07,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 211.9ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:38:07,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6221 states. [2021-07-09 18:38:07,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6221 to 5759. [2021-07-09 18:38:08,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5759 states, 5758 states have (on average 2.8754775963876344) internal successors, (16557), 5758 states have internal predecessors, (16557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:08,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5759 states to 5759 states and 16557 transitions. [2021-07-09 18:38:08,013 INFO L78 Accepts]: Start accepts. Automaton has 5759 states and 16557 transitions. Word has length 34 [2021-07-09 18:38:08,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:08,013 INFO L482 AbstractCegarLoop]: Abstraction has 5759 states and 16557 transitions. [2021-07-09 18:38:08,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 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 18:38:08,014 INFO L276 IsEmpty]: Start isEmpty. Operand 5759 states and 16557 transitions. [2021-07-09 18:38:08,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:38:08,021 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:08,021 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:08,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:08,241 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:08,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:08,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1700224024, now seen corresponding path program 50 times [2021-07-09 18:38:08,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:08,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972655087] [2021-07-09 18:38:08,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:08,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:08,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972655087] [2021-07-09 18:38:08,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972655087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:08,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628161424] [2021-07-09 18:38:08,337 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 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 18:38:08,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:38:08,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:08,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:38:08,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:08,546 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:08,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628161424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:08,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:08,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 18:38:08,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954190171] [2021-07-09 18:38:08,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:38:08,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:08,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:38:08,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:38:08,547 INFO L87 Difference]: Start difference. First operand 5759 states and 16557 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 18:38:09,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:09,170 INFO L93 Difference]: Finished difference Result 9192 states and 26186 transitions. [2021-07-09 18:38:09,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:38:09,170 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 34 [2021-07-09 18:38:09,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:09,186 INFO L225 Difference]: With dead ends: 9192 [2021-07-09 18:38:09,186 INFO L226 Difference]: Without dead ends: 9075 [2021-07-09 18:38:09,186 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 458.0ms TimeCoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:38:09,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9075 states. [2021-07-09 18:38:09,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9075 to 6177. [2021-07-09 18:38:09,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6177 states, 6176 states have (on average 2.8848769430051813) internal successors, (17817), 6176 states have internal predecessors, (17817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:09,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6177 states to 6177 states and 17817 transitions. [2021-07-09 18:38:09,291 INFO L78 Accepts]: Start accepts. Automaton has 6177 states and 17817 transitions. Word has length 34 [2021-07-09 18:38:09,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:09,291 INFO L482 AbstractCegarLoop]: Abstraction has 6177 states and 17817 transitions. [2021-07-09 18:38:09,291 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 18:38:09,291 INFO L276 IsEmpty]: Start isEmpty. Operand 6177 states and 17817 transitions. [2021-07-09 18:38:09,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:38:09,299 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:09,299 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:09,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-07-09 18:38:09,500 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:09,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:09,500 INFO L82 PathProgramCache]: Analyzing trace with hash -609780788, now seen corresponding path program 51 times [2021-07-09 18:38:09,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:09,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575092160] [2021-07-09 18:38:09,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:09,617 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:09,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:09,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575092160] [2021-07-09 18:38:09,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575092160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:09,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473307820] [2021-07-09 18:38:09,618 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 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 18:38:09,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:38:09,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:09,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:38:09,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:09,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:09,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473307820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:09,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:09,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-09 18:38:09,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401617982] [2021-07-09 18:38:09,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:38:09,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:09,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:38:09,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:38:09,819 INFO L87 Difference]: Start difference. First operand 6177 states and 17817 transitions. Second operand has 20 states, 20 states have (on average 2.75) 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 18:38:10,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:10,139 INFO L93 Difference]: Finished difference Result 7837 states and 22506 transitions. [2021-07-09 18:38:10,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:38:10,139 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) 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 34 [2021-07-09 18:38:10,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:10,151 INFO L225 Difference]: With dead ends: 7837 [2021-07-09 18:38:10,151 INFO L226 Difference]: Without dead ends: 7747 [2021-07-09 18:38:10,151 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 296.8ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:38:10,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7747 states. [2021-07-09 18:38:10,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7747 to 7535. [2021-07-09 18:38:10,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7535 states, 7534 states have (on average 2.8967348022298913) internal successors, (21824), 7534 states have internal predecessors, (21824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:10,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7535 states to 7535 states and 21824 transitions. [2021-07-09 18:38:10,257 INFO L78 Accepts]: Start accepts. Automaton has 7535 states and 21824 transitions. Word has length 34 [2021-07-09 18:38:10,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:10,257 INFO L482 AbstractCegarLoop]: Abstraction has 7535 states and 21824 transitions. [2021-07-09 18:38:10,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.75) 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 18:38:10,257 INFO L276 IsEmpty]: Start isEmpty. Operand 7535 states and 21824 transitions. [2021-07-09 18:38:10,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:38:10,267 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:10,267 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:10,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-07-09 18:38:10,467 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:10,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:10,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1832711224, now seen corresponding path program 52 times [2021-07-09 18:38:10,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:10,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764938787] [2021-07-09 18:38:10,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:10,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:10,534 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:10,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:10,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764938787] [2021-07-09 18:38:10,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764938787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:10,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106630916] [2021-07-09 18:38:10,535 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 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 18:38:10,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:38:10,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:10,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:38:10,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:10,707 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:10,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106630916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:10,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:10,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-07-09 18:38:10,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593690197] [2021-07-09 18:38:10,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:38:10,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:10,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:38:10,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:38:10,708 INFO L87 Difference]: Start difference. First operand 7535 states and 21824 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 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 18:38:10,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:10,881 INFO L93 Difference]: Finished difference Result 7993 states and 22963 transitions. [2021-07-09 18:38:10,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:38:10,881 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 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 34 [2021-07-09 18:38:10,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:10,895 INFO L225 Difference]: With dead ends: 7993 [2021-07-09 18:38:10,895 INFO L226 Difference]: Without dead ends: 7883 [2021-07-09 18:38:10,895 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 156.6ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:38:10,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7883 states. [2021-07-09 18:38:11,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7883 to 7515. [2021-07-09 18:38:11,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7515 states, 7514 states have (on average 2.8945967527282406) internal successors, (21750), 7514 states have internal predecessors, (21750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:11,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7515 states to 7515 states and 21750 transitions. [2021-07-09 18:38:11,042 INFO L78 Accepts]: Start accepts. Automaton has 7515 states and 21750 transitions. Word has length 34 [2021-07-09 18:38:11,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:11,042 INFO L482 AbstractCegarLoop]: Abstraction has 7515 states and 21750 transitions. [2021-07-09 18:38:11,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 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 18:38:11,043 INFO L276 IsEmpty]: Start isEmpty. Operand 7515 states and 21750 transitions. [2021-07-09 18:38:11,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:38:11,055 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:11,055 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:11,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:11,257 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:11,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:11,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1436916066, now seen corresponding path program 53 times [2021-07-09 18:38:11,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:11,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558307018] [2021-07-09 18:38:11,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:11,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:11,350 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:11,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:11,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558307018] [2021-07-09 18:38:11,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558307018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:11,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569394240] [2021-07-09 18:38:11,350 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 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 18:38:11,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:38:11,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:11,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:38:11,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:11,573 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:11,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569394240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:11,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:11,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-09 18:38:11,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594670216] [2021-07-09 18:38:11,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:38:11,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:11,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:38:11,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:38:11,574 INFO L87 Difference]: Start difference. First operand 7515 states and 21750 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) 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 18:38:11,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:11,730 INFO L93 Difference]: Finished difference Result 8802 states and 25332 transitions. [2021-07-09 18:38:11,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:38:11,731 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) 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 34 [2021-07-09 18:38:11,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:11,745 INFO L225 Difference]: With dead ends: 8802 [2021-07-09 18:38:11,745 INFO L226 Difference]: Without dead ends: 8678 [2021-07-09 18:38:11,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 196.9ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:38:11,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8678 states. [2021-07-09 18:38:11,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8678 to 8409. [2021-07-09 18:38:11,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8409 states, 8408 states have (on average 2.9042578496669837) internal successors, (24419), 8408 states have internal predecessors, (24419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:11,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8409 states to 8409 states and 24419 transitions. [2021-07-09 18:38:11,863 INFO L78 Accepts]: Start accepts. Automaton has 8409 states and 24419 transitions. Word has length 34 [2021-07-09 18:38:11,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:11,863 INFO L482 AbstractCegarLoop]: Abstraction has 8409 states and 24419 transitions. [2021-07-09 18:38:11,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0555555555555554) 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 18:38:11,863 INFO L276 IsEmpty]: Start isEmpty. Operand 8409 states and 24419 transitions. [2021-07-09 18:38:11,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:38:11,874 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:11,874 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:12,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:12,077 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:12,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:12,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1476529958, now seen corresponding path program 54 times [2021-07-09 18:38:12,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:12,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875464451] [2021-07-09 18:38:12,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:12,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:12,217 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:12,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:12,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875464451] [2021-07-09 18:38:12,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875464451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:12,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534267231] [2021-07-09 18:38:12,219 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 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 18:38:12,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:38:12,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:12,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:38:12,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:12,417 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:12,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534267231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:12,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:12,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-07-09 18:38:12,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121385667] [2021-07-09 18:38:12,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:38:12,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:12,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:38:12,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:38:12,418 INFO L87 Difference]: Start difference. First operand 8409 states and 24419 transitions. Second operand has 16 states, 16 states have (on average 2.875) 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 18:38:12,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:12,582 INFO L93 Difference]: Finished difference Result 12458 states and 36267 transitions. [2021-07-09 18:38:12,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:38:12,583 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) 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 34 [2021-07-09 18:38:12,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:12,604 INFO L225 Difference]: With dead ends: 12458 [2021-07-09 18:38:12,604 INFO L226 Difference]: Without dead ends: 12421 [2021-07-09 18:38:12,605 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 227.0ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:38:12,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12421 states. [2021-07-09 18:38:12,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12421 to 8417. [2021-07-09 18:38:12,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8417 states, 8416 states have (on average 2.9038735741444865) internal successors, (24439), 8416 states have internal predecessors, (24439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:12,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8417 states to 8417 states and 24439 transitions. [2021-07-09 18:38:12,751 INFO L78 Accepts]: Start accepts. Automaton has 8417 states and 24439 transitions. Word has length 34 [2021-07-09 18:38:12,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:12,751 INFO L482 AbstractCegarLoop]: Abstraction has 8417 states and 24439 transitions. [2021-07-09 18:38:12,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) 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 18:38:12,751 INFO L276 IsEmpty]: Start isEmpty. Operand 8417 states and 24439 transitions. [2021-07-09 18:38:12,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:38:12,762 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:12,762 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:12,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:12,963 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:12,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:12,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1106347742, now seen corresponding path program 55 times [2021-07-09 18:38:12,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:12,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114141574] [2021-07-09 18:38:12,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:12,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:13,066 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:13,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:13,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114141574] [2021-07-09 18:38:13,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114141574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:13,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341242426] [2021-07-09 18:38:13,067 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 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 18:38:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:13,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:38:13,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:13,224 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:13,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341242426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:13,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:13,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 18:38:13,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960672579] [2021-07-09 18:38:13,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:38:13,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:13,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:38:13,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:38:13,225 INFO L87 Difference]: Start difference. First operand 8417 states and 24439 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) 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 18:38:13,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:13,407 INFO L93 Difference]: Finished difference Result 12426 states and 36223 transitions. [2021-07-09 18:38:13,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:38:13,408 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) 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 34 [2021-07-09 18:38:13,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:13,430 INFO L225 Difference]: With dead ends: 12426 [2021-07-09 18:38:13,430 INFO L226 Difference]: Without dead ends: 12389 [2021-07-09 18:38:13,430 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 162.6ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:38:13,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12389 states. [2021-07-09 18:38:13,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12389 to 8439. [2021-07-09 18:38:13,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8439 states, 8438 states have (on average 2.9040056885517895) internal successors, (24504), 8438 states have internal predecessors, (24504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:13,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8439 states to 8439 states and 24504 transitions. [2021-07-09 18:38:13,587 INFO L78 Accepts]: Start accepts. Automaton has 8439 states and 24504 transitions. Word has length 34 [2021-07-09 18:38:13,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:13,587 INFO L482 AbstractCegarLoop]: Abstraction has 8439 states and 24504 transitions. [2021-07-09 18:38:13,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) 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 18:38:13,587 INFO L276 IsEmpty]: Start isEmpty. Operand 8439 states and 24504 transitions. [2021-07-09 18:38:13,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:38:13,598 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:13,598 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:13,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-07-09 18:38:13,798 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:13,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:13,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1794849946, now seen corresponding path program 56 times [2021-07-09 18:38:13,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:13,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299196584] [2021-07-09 18:38:13,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:13,891 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:13,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:13,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299196584] [2021-07-09 18:38:13,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299196584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:13,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540407055] [2021-07-09 18:38:13,891 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 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 18:38:13,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:38:13,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:13,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:38:13,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:14,072 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:14,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540407055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:14,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:14,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 18:38:14,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491275616] [2021-07-09 18:38:14,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:38:14,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:14,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:38:14,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:38:14,073 INFO L87 Difference]: Start difference. First operand 8439 states and 24504 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 18:38:14,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:14,553 INFO L93 Difference]: Finished difference Result 13272 states and 38395 transitions. [2021-07-09 18:38:14,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:38:14,553 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 34 [2021-07-09 18:38:14,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:14,577 INFO L225 Difference]: With dead ends: 13272 [2021-07-09 18:38:14,577 INFO L226 Difference]: Without dead ends: 13198 [2021-07-09 18:38:14,577 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 355.9ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:38:14,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13198 states. [2021-07-09 18:38:14,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13198 to 8873. [2021-07-09 18:38:14,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8873 states, 8872 states have (on average 2.9063345356176735) internal successors, (25785), 8872 states have internal predecessors, (25785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:14,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8873 states to 8873 states and 25785 transitions. [2021-07-09 18:38:14,756 INFO L78 Accepts]: Start accepts. Automaton has 8873 states and 25785 transitions. Word has length 34 [2021-07-09 18:38:14,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:14,756 INFO L482 AbstractCegarLoop]: Abstraction has 8873 states and 25785 transitions. [2021-07-09 18:38:14,756 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 18:38:14,757 INFO L276 IsEmpty]: Start isEmpty. Operand 8873 states and 25785 transitions. [2021-07-09 18:38:14,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:38:14,768 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:14,768 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:14,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:14,973 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:14,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:14,973 INFO L82 PathProgramCache]: Analyzing trace with hash 39846686, now seen corresponding path program 57 times [2021-07-09 18:38:14,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:14,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122296320] [2021-07-09 18:38:14,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:14,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:15,062 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:15,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:15,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122296320] [2021-07-09 18:38:15,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122296320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:15,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125011648] [2021-07-09 18:38:15,062 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 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 18:38:15,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:38:15,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:15,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:38:15,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:15,221 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:15,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125011648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:15,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:15,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-07-09 18:38:15,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005830500] [2021-07-09 18:38:15,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:38:15,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:15,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:38:15,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:38:15,222 INFO L87 Difference]: Start difference. First operand 8873 states and 25785 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) 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 18:38:15,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:15,633 INFO L93 Difference]: Finished difference Result 14096 states and 40972 transitions. [2021-07-09 18:38:15,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:38:15,634 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) 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 34 [2021-07-09 18:38:15,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:15,660 INFO L225 Difference]: With dead ends: 14096 [2021-07-09 18:38:15,660 INFO L226 Difference]: Without dead ends: 14006 [2021-07-09 18:38:15,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 270.6ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:38:15,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14006 states. [2021-07-09 18:38:15,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14006 to 9649. [2021-07-09 18:38:15,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9649 states, 9648 states have (on average 2.91386815920398) internal successors, (28113), 9648 states have internal predecessors, (28113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:15,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9649 states to 9649 states and 28113 transitions. [2021-07-09 18:38:15,885 INFO L78 Accepts]: Start accepts. Automaton has 9649 states and 28113 transitions. Word has length 34 [2021-07-09 18:38:15,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:15,885 INFO L482 AbstractCegarLoop]: Abstraction has 9649 states and 28113 transitions. [2021-07-09 18:38:15,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) 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 18:38:15,885 INFO L276 IsEmpty]: Start isEmpty. Operand 9649 states and 28113 transitions. [2021-07-09 18:38:15,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:38:15,898 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:15,898 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:16,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-07-09 18:38:16,099 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:16,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:16,099 INFO L82 PathProgramCache]: Analyzing trace with hash -79236326, now seen corresponding path program 58 times [2021-07-09 18:38:16,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:16,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882946672] [2021-07-09 18:38:16,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:16,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:16,195 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:16,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:16,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882946672] [2021-07-09 18:38:16,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882946672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:16,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705118104] [2021-07-09 18:38:16,196 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 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 18:38:16,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:38:16,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:16,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:38:16,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:16,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705118104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:16,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:16,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 18:38:16,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196158183] [2021-07-09 18:38:16,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:38:16,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:16,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:38:16,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:38:16,391 INFO L87 Difference]: Start difference. First operand 9649 states and 28113 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) 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 18:38:16,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:16,698 INFO L93 Difference]: Finished difference Result 14018 states and 40804 transitions. [2021-07-09 18:38:16,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:38:16,698 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) 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 34 [2021-07-09 18:38:16,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:16,722 INFO L225 Difference]: With dead ends: 14018 [2021-07-09 18:38:16,722 INFO L226 Difference]: Without dead ends: 13916 [2021-07-09 18:38:16,722 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 217.6ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:38:16,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13916 states. [2021-07-09 18:38:16,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13916 to 9263. [2021-07-09 18:38:16,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9263 states, 9262 states have (on average 2.9084431008421507) internal successors, (26938), 9262 states have internal predecessors, (26938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:16,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9263 states to 9263 states and 26938 transitions. [2021-07-09 18:38:16,882 INFO L78 Accepts]: Start accepts. Automaton has 9263 states and 26938 transitions. Word has length 34 [2021-07-09 18:38:16,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:16,882 INFO L482 AbstractCegarLoop]: Abstraction has 9263 states and 26938 transitions. [2021-07-09 18:38:16,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) 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 18:38:16,882 INFO L276 IsEmpty]: Start isEmpty. Operand 9263 states and 26938 transitions. [2021-07-09 18:38:16,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:38:16,894 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:16,894 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:17,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:17,094 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:17,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:17,094 INFO L82 PathProgramCache]: Analyzing trace with hash -73441712, now seen corresponding path program 59 times [2021-07-09 18:38:17,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:17,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017803560] [2021-07-09 18:38:17,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:17,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:17,194 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:17,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:17,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017803560] [2021-07-09 18:38:17,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017803560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:17,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99079082] [2021-07-09 18:38:17,194 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 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 18:38:17,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:38:17,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:17,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:38:17,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:17,432 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:17,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99079082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:17,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:17,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:38:17,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293145869] [2021-07-09 18:38:17,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:38:17,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:17,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:38:17,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:38:17,433 INFO L87 Difference]: Start difference. First operand 9263 states and 26938 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) 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 18:38:17,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:17,619 INFO L93 Difference]: Finished difference Result 10323 states and 29755 transitions. [2021-07-09 18:38:17,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:38:17,619 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) 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 34 [2021-07-09 18:38:17,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:17,637 INFO L225 Difference]: With dead ends: 10323 [2021-07-09 18:38:17,637 INFO L226 Difference]: Without dead ends: 10249 [2021-07-09 18:38:17,637 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 190.4ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:38:17,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10249 states. [2021-07-09 18:38:17,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10249 to 9581. [2021-07-09 18:38:17,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9581 states, 9580 states have (on average 2.9115866388308977) internal successors, (27893), 9580 states have internal predecessors, (27893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:17,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9581 states to 9581 states and 27893 transitions. [2021-07-09 18:38:17,783 INFO L78 Accepts]: Start accepts. Automaton has 9581 states and 27893 transitions. Word has length 34 [2021-07-09 18:38:17,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:17,784 INFO L482 AbstractCegarLoop]: Abstraction has 9581 states and 27893 transitions. [2021-07-09 18:38:17,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) 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 18:38:17,784 INFO L276 IsEmpty]: Start isEmpty. Operand 9581 states and 27893 transitions. [2021-07-09 18:38:17,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:38:17,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:17,796 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:17,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:17,997 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:17,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:17,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1174536768, now seen corresponding path program 60 times [2021-07-09 18:38:17,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:17,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312745736] [2021-07-09 18:38:17,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:18,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:18,073 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:18,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:18,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312745736] [2021-07-09 18:38:18,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312745736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:18,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957340503] [2021-07-09 18:38:18,074 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) [2021-07-09 18:38:18,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:38:18,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:18,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:38:18,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:18,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:18,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957340503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:18,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:18,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-07-09 18:38:18,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809486004] [2021-07-09 18:38:18,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:38:18,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:18,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:38:18,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:38:18,229 INFO L87 Difference]: Start difference. First operand 9581 states and 27893 transitions. Second operand has 17 states, 17 states have (on average 3.0) 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 18:38:18,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:18,438 INFO L93 Difference]: Finished difference Result 10737 states and 30998 transitions. [2021-07-09 18:38:18,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:38:18,438 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) 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 34 [2021-07-09 18:38:18,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:18,457 INFO L225 Difference]: With dead ends: 10737 [2021-07-09 18:38:18,457 INFO L226 Difference]: Without dead ends: 10663 [2021-07-09 18:38:18,457 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 160.4ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:38:18,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10663 states. [2021-07-09 18:38:18,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10663 to 9517. [2021-07-09 18:38:18,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9517 states, 9516 states have (on average 2.9135140815468685) internal successors, (27725), 9516 states have internal predecessors, (27725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:18,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9517 states to 9517 states and 27725 transitions. [2021-07-09 18:38:18,619 INFO L78 Accepts]: Start accepts. Automaton has 9517 states and 27725 transitions. Word has length 34 [2021-07-09 18:38:18,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:18,619 INFO L482 AbstractCegarLoop]: Abstraction has 9517 states and 27725 transitions. [2021-07-09 18:38:18,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) 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 18:38:18,619 INFO L276 IsEmpty]: Start isEmpty. Operand 9517 states and 27725 transitions. [2021-07-09 18:38:18,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:38:18,631 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:18,631 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:18,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:18,832 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:18,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:18,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1467187430, now seen corresponding path program 61 times [2021-07-09 18:38:18,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:18,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673094315] [2021-07-09 18:38:18,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:18,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:18,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:18,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:18,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673094315] [2021-07-09 18:38:18,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673094315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:18,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647353614] [2021-07-09 18:38:18,914 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 18:38:18,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:18,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:38:18,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:19,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647353614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:19,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:19,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-07-09 18:38:19,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346859330] [2021-07-09 18:38:19,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:38:19,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:19,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:38:19,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:38:19,068 INFO L87 Difference]: Start difference. First operand 9517 states and 27725 transitions. Second operand has 17 states, 17 states have (on average 3.0) 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 18:38:19,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:19,297 INFO L93 Difference]: Finished difference Result 11479 states and 33244 transitions. [2021-07-09 18:38:19,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:38:19,297 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) 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 34 [2021-07-09 18:38:19,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:19,317 INFO L225 Difference]: With dead ends: 11479 [2021-07-09 18:38:19,317 INFO L226 Difference]: Without dead ends: 11389 [2021-07-09 18:38:19,317 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 168.5ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:38:19,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11389 states. [2021-07-09 18:38:19,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11389 to 10325. [2021-07-09 18:38:19,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10325 states, 10324 states have (on average 2.9226075164664858) internal successors, (30173), 10324 states have internal predecessors, (30173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:19,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10325 states to 10325 states and 30173 transitions. [2021-07-09 18:38:19,478 INFO L78 Accepts]: Start accepts. Automaton has 10325 states and 30173 transitions. Word has length 34 [2021-07-09 18:38:19,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:19,478 INFO L482 AbstractCegarLoop]: Abstraction has 10325 states and 30173 transitions. [2021-07-09 18:38:19,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) 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 18:38:19,478 INFO L276 IsEmpty]: Start isEmpty. Operand 10325 states and 30173 transitions. [2021-07-09 18:38:19,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:38:19,493 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:19,493 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:19,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:19,694 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:19,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:19,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1348104418, now seen corresponding path program 62 times [2021-07-09 18:38:19,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:19,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160851279] [2021-07-09 18:38:19,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:19,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:19,767 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:38:19,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:19,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160851279] [2021-07-09 18:38:19,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160851279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:19,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017755349] [2021-07-09 18:38:19,768 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 18:38:19,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:38:19,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:19,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:38:19,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:19,941 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:19,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017755349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:19,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:19,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-07-09 18:38:19,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923428321] [2021-07-09 18:38:19,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:38:19,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:19,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:38:19,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:38:19,942 INFO L87 Difference]: Start difference. First operand 10325 states and 30173 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) 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 18:38:20,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:20,189 INFO L93 Difference]: Finished difference Result 11471 states and 33214 transitions. [2021-07-09 18:38:20,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:38:20,189 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) 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 34 [2021-07-09 18:38:20,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:20,207 INFO L225 Difference]: With dead ends: 11471 [2021-07-09 18:38:20,207 INFO L226 Difference]: Without dead ends: 11355 [2021-07-09 18:38:20,207 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 176.8ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:38:20,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11355 states. [2021-07-09 18:38:20,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11355 to 10297. [2021-07-09 18:38:20,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10297 states, 10296 states have (on average 2.9198717948717947) internal successors, (30063), 10296 states have internal predecessors, (30063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:20,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10297 states to 10297 states and 30063 transitions. [2021-07-09 18:38:20,360 INFO L78 Accepts]: Start accepts. Automaton has 10297 states and 30063 transitions. Word has length 34 [2021-07-09 18:38:20,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:20,360 INFO L482 AbstractCegarLoop]: Abstraction has 10297 states and 30063 transitions. [2021-07-09 18:38:20,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) 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 18:38:20,361 INFO L276 IsEmpty]: Start isEmpty. Operand 10297 states and 30063 transitions. [2021-07-09 18:38:20,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:38:20,374 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:20,374 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:20,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-07-09 18:38:20,576 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:20,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:20,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1492392000, now seen corresponding path program 63 times [2021-07-09 18:38:20,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:20,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539095298] [2021-07-09 18:38:20,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:20,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:20,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:20,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539095298] [2021-07-09 18:38:20,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539095298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:20,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004829449] [2021-07-09 18:38:20,664 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 18:38:20,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:38:20,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:20,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:38:20,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:20,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004829449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:20,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:20,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-09 18:38:20,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230197042] [2021-07-09 18:38:20,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:38:20,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:20,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:38:20,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:38:20,872 INFO L87 Difference]: Start difference. First operand 10297 states and 30063 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) 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 18:38:21,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:21,219 INFO L93 Difference]: Finished difference Result 11184 states and 32274 transitions. [2021-07-09 18:38:21,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:38:21,219 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) 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 34 [2021-07-09 18:38:21,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:21,238 INFO L225 Difference]: With dead ends: 11184 [2021-07-09 18:38:21,238 INFO L226 Difference]: Without dead ends: 11060 [2021-07-09 18:38:21,238 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 274.8ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:38:21,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11060 states. [2021-07-09 18:38:21,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11060 to 9779. [2021-07-09 18:38:21,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9779 states, 9778 states have (on average 2.916138269584782) internal successors, (28514), 9778 states have internal predecessors, (28514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:21,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9779 states to 9779 states and 28514 transitions. [2021-07-09 18:38:21,433 INFO L78 Accepts]: Start accepts. Automaton has 9779 states and 28514 transitions. Word has length 34 [2021-07-09 18:38:21,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:21,433 INFO L482 AbstractCegarLoop]: Abstraction has 9779 states and 28514 transitions. [2021-07-09 18:38:21,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6842105263157894) 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 18:38:21,433 INFO L276 IsEmpty]: Start isEmpty. Operand 9779 states and 28514 transitions. [2021-07-09 18:38:21,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:38:21,447 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:21,447 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:21,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-09 18:38:21,648 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:21,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:21,648 INFO L82 PathProgramCache]: Analyzing trace with hash 821082048, now seen corresponding path program 64 times [2021-07-09 18:38:21,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:21,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539097270] [2021-07-09 18:38:21,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:21,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:21,756 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:21,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:21,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539097270] [2021-07-09 18:38:21,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539097270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:21,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094299024] [2021-07-09 18:38:21,757 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 18:38:21,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:38:21,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:21,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:38:21,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:21,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:21,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094299024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:21,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:21,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:38:21,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264258482] [2021-07-09 18:38:21,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:38:21,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:21,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:38:21,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:38:21,954 INFO L87 Difference]: Start difference. First operand 9779 states and 28514 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) 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 18:38:22,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:22,158 INFO L93 Difference]: Finished difference Result 11079 states and 32153 transitions. [2021-07-09 18:38:22,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:38:22,159 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) 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 34 [2021-07-09 18:38:22,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:22,177 INFO L225 Difference]: With dead ends: 11079 [2021-07-09 18:38:22,177 INFO L226 Difference]: Without dead ends: 10985 [2021-07-09 18:38:22,177 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 217.2ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:38:22,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10985 states. [2021-07-09 18:38:22,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10985 to 9971. [2021-07-09 18:38:22,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9971 states, 9970 states have (on average 2.919558676028084) internal successors, (29108), 9970 states have internal predecessors, (29108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:22,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9971 states to 9971 states and 29108 transitions. [2021-07-09 18:38:22,326 INFO L78 Accepts]: Start accepts. Automaton has 9971 states and 29108 transitions. Word has length 34 [2021-07-09 18:38:22,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:22,326 INFO L482 AbstractCegarLoop]: Abstraction has 9971 states and 29108 transitions. [2021-07-09 18:38:22,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) 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 18:38:22,326 INFO L276 IsEmpty]: Start isEmpty. Operand 9971 states and 29108 transitions. [2021-07-09 18:38:22,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:38:22,339 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:22,339 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:22,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-09 18:38:22,540 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:22,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:22,540 INFO L82 PathProgramCache]: Analyzing trace with hash 380365402, now seen corresponding path program 65 times [2021-07-09 18:38:22,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:22,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511440766] [2021-07-09 18:38:22,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:22,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:22,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:22,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511440766] [2021-07-09 18:38:22,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511440766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:22,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844639921] [2021-07-09 18:38:22,622 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 18:38:22,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:38:22,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:22,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:38:22,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:22,795 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:22,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844639921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:22,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:22,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-09 18:38:22,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430678941] [2021-07-09 18:38:22,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:38:22,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:22,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:38:22,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:38:22,796 INFO L87 Difference]: Start difference. First operand 9971 states and 29108 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 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 18:38:23,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:23,003 INFO L93 Difference]: Finished difference Result 10775 states and 31285 transitions. [2021-07-09 18:38:23,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:38:23,004 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:38:23,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:23,022 INFO L225 Difference]: With dead ends: 10775 [2021-07-09 18:38:23,022 INFO L226 Difference]: Without dead ends: 10661 [2021-07-09 18:38:23,023 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 174.5ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:38:23,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10661 states. [2021-07-09 18:38:23,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10661 to 8963. [2021-07-09 18:38:23,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8963 states, 8962 states have (on average 2.92256192814104) internal successors, (26192), 8962 states have internal predecessors, (26192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:23,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8963 states to 8963 states and 26192 transitions. [2021-07-09 18:38:23,216 INFO L78 Accepts]: Start accepts. Automaton has 8963 states and 26192 transitions. Word has length 34 [2021-07-09 18:38:23,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:23,216 INFO L482 AbstractCegarLoop]: Abstraction has 8963 states and 26192 transitions. [2021-07-09 18:38:23,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 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 18:38:23,216 INFO L276 IsEmpty]: Start isEmpty. Operand 8963 states and 26192 transitions. [2021-07-09 18:38:23,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:38:23,228 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:23,228 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:23,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-07-09 18:38:23,428 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:23,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:23,429 INFO L82 PathProgramCache]: Analyzing trace with hash 2118924544, now seen corresponding path program 66 times [2021-07-09 18:38:23,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:23,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405058199] [2021-07-09 18:38:23,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:23,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:23,494 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:23,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:23,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405058199] [2021-07-09 18:38:23,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405058199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:23,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145417768] [2021-07-09 18:38:23,494 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 18:38:23,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:38:23,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:23,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:38:23,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:23,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:23,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145417768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:23,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:23,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-07-09 18:38:23,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015998850] [2021-07-09 18:38:23,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:38:23,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:23,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:38:23,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:38:23,667 INFO L87 Difference]: Start difference. First operand 8963 states and 26192 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) 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 18:38:23,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:23,862 INFO L93 Difference]: Finished difference Result 10683 states and 31168 transitions. [2021-07-09 18:38:23,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:38:23,862 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) 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 34 [2021-07-09 18:38:23,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:23,881 INFO L225 Difference]: With dead ends: 10683 [2021-07-09 18:38:23,882 INFO L226 Difference]: Without dead ends: 10601 [2021-07-09 18:38:23,882 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 159.8ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:38:23,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10601 states. [2021-07-09 18:38:24,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10601 to 9899. [2021-07-09 18:38:24,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9899 states, 9898 states have (on average 2.931501313396646) internal successors, (29016), 9898 states have internal predecessors, (29016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:24,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9899 states to 9899 states and 29016 transitions. [2021-07-09 18:38:24,032 INFO L78 Accepts]: Start accepts. Automaton has 9899 states and 29016 transitions. Word has length 34 [2021-07-09 18:38:24,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:24,033 INFO L482 AbstractCegarLoop]: Abstraction has 9899 states and 29016 transitions. [2021-07-09 18:38:24,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) 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 18:38:24,033 INFO L276 IsEmpty]: Start isEmpty. Operand 9899 states and 29016 transitions. [2021-07-09 18:38:24,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:38:24,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:24,046 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:24,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:24,246 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:24,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:24,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1999841532, now seen corresponding path program 67 times [2021-07-09 18:38:24,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:24,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729070033] [2021-07-09 18:38:24,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:24,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:24,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:38:24,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:24,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729070033] [2021-07-09 18:38:24,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729070033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:24,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303753802] [2021-07-09 18:38:24,310 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 18:38:24,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:24,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:38:24,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:24,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:24,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303753802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:24,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:24,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-07-09 18:38:24,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505139449] [2021-07-09 18:38:24,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:38:24,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:24,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:38:24,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:38:24,488 INFO L87 Difference]: Start difference. First operand 9899 states and 29016 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) 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 18:38:24,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:24,674 INFO L93 Difference]: Finished difference Result 10680 states and 31156 transitions. [2021-07-09 18:38:24,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:38:24,674 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) 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 34 [2021-07-09 18:38:24,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:24,693 INFO L225 Difference]: With dead ends: 10680 [2021-07-09 18:38:24,693 INFO L226 Difference]: Without dead ends: 10568 [2021-07-09 18:38:24,694 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 163.3ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:38:24,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10568 states. [2021-07-09 18:38:24,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10568 to 8935. [2021-07-09 18:38:24,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8935 states, 8934 states have (on average 2.9267965077233042) internal successors, (26148), 8934 states have internal predecessors, (26148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:24,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8935 states to 8935 states and 26148 transitions. [2021-07-09 18:38:24,855 INFO L78 Accepts]: Start accepts. Automaton has 8935 states and 26148 transitions. Word has length 34 [2021-07-09 18:38:24,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:24,855 INFO L482 AbstractCegarLoop]: Abstraction has 8935 states and 26148 transitions. [2021-07-09 18:38:24,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) 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 18:38:24,855 INFO L276 IsEmpty]: Start isEmpty. Operand 8935 states and 26148 transitions. [2021-07-09 18:38:24,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:38:24,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:24,867 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:25,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-07-09 18:38:25,068 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:25,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:25,068 INFO L82 PathProgramCache]: Analyzing trace with hash 2144129114, now seen corresponding path program 68 times [2021-07-09 18:38:25,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:25,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108205856] [2021-07-09 18:38:25,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:25,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:25,149 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:38:25,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:25,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108205856] [2021-07-09 18:38:25,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108205856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:25,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407382017] [2021-07-09 18:38:25,150 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 18:38:25,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:38:25,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:25,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:38:25,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:25,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407382017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:25,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:25,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-09 18:38:25,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47362439] [2021-07-09 18:38:25,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:38:25,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:25,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:38:25,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:38:25,360 INFO L87 Difference]: Start difference. First operand 8935 states and 26148 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 18:38:25,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:25,750 INFO L93 Difference]: Finished difference Result 10608 states and 30827 transitions. [2021-07-09 18:38:25,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:38:25,750 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 34 [2021-07-09 18:38:25,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:25,767 INFO L225 Difference]: With dead ends: 10608 [2021-07-09 18:38:25,767 INFO L226 Difference]: Without dead ends: 10484 [2021-07-09 18:38:25,767 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 330.4ms TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:38:25,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10484 states. [2021-07-09 18:38:25,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10484 to 10195. [2021-07-09 18:38:25,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10195 states, 10194 states have (on average 2.9315283500098097) internal successors, (29884), 10194 states have internal predecessors, (29884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:25,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10195 states to 10195 states and 29884 transitions. [2021-07-09 18:38:25,918 INFO L78 Accepts]: Start accepts. Automaton has 10195 states and 29884 transitions. Word has length 34 [2021-07-09 18:38:25,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:25,918 INFO L482 AbstractCegarLoop]: Abstraction has 10195 states and 29884 transitions. [2021-07-09 18:38:25,918 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 18:38:25,919 INFO L276 IsEmpty]: Start isEmpty. Operand 10195 states and 29884 transitions. [2021-07-09 18:38:25,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:38:25,932 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:25,932 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:26,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:26,133 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:26,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:26,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1151402982, now seen corresponding path program 69 times [2021-07-09 18:38:26,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:26,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463549095] [2021-07-09 18:38:26,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:26,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:26,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:26,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463549095] [2021-07-09 18:38:26,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463549095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:26,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107719310] [2021-07-09 18:38:26,234 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 18:38:26,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:38:26,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:26,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:38:26,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:26,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107719310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:26,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:26,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-09 18:38:26,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763446966] [2021-07-09 18:38:26,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:38:26,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:26,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:38:26,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:38:26,452 INFO L87 Difference]: Start difference. First operand 10195 states and 29884 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:26,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:26,788 INFO L93 Difference]: Finished difference Result 10519 states and 30598 transitions. [2021-07-09 18:38:26,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:38:26,788 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:38:26,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:26,802 INFO L225 Difference]: With dead ends: 10519 [2021-07-09 18:38:26,802 INFO L226 Difference]: Without dead ends: 10443 [2021-07-09 18:38:26,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 342.4ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:38:26,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10443 states. [2021-07-09 18:38:26,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10443 to 10179. [2021-07-09 18:38:26,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10179 states, 10178 states have (on average 2.9320102181175085) internal successors, (29842), 10178 states have internal predecessors, (29842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:26,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10179 states to 10179 states and 29842 transitions. [2021-07-09 18:38:26,938 INFO L78 Accepts]: Start accepts. Automaton has 10179 states and 29842 transitions. Word has length 34 [2021-07-09 18:38:26,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:26,938 INFO L482 AbstractCegarLoop]: Abstraction has 10179 states and 29842 transitions. [2021-07-09 18:38:26,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:26,939 INFO L276 IsEmpty]: Start isEmpty. Operand 10179 states and 29842 transitions. [2021-07-09 18:38:26,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:38:26,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:26,952 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:27,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-09 18:38:27,152 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:27,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:27,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1142772374, now seen corresponding path program 70 times [2021-07-09 18:38:27,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:27,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399427453] [2021-07-09 18:38:27,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:27,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:27,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399427453] [2021-07-09 18:38:27,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399427453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:27,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761372601] [2021-07-09 18:38:27,190 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 18:38:27,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:38:27,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:27,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:38:27,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:27,306 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:27,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761372601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:27,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:27,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:38:27,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034657465] [2021-07-09 18:38:27,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:38:27,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:27,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:38:27,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:38:27,307 INFO L87 Difference]: Start difference. First operand 10179 states and 29842 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 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 18:38:27,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:27,633 INFO L93 Difference]: Finished difference Result 12685 states and 36351 transitions. [2021-07-09 18:38:27,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:38:27,634 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 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 37 [2021-07-09 18:38:27,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:27,657 INFO L225 Difference]: With dead ends: 12685 [2021-07-09 18:38:27,657 INFO L226 Difference]: Without dead ends: 12685 [2021-07-09 18:38:27,657 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 217.6ms TimeCoverageRelationStatistics Valid=314, Invalid=876, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:38:27,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12685 states. [2021-07-09 18:38:27,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12685 to 10409. [2021-07-09 18:38:27,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10409 states, 10408 states have (on average 2.9320714834742505) internal successors, (30517), 10408 states have internal predecessors, (30517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:27,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10409 states to 10409 states and 30517 transitions. [2021-07-09 18:38:27,830 INFO L78 Accepts]: Start accepts. Automaton has 10409 states and 30517 transitions. Word has length 37 [2021-07-09 18:38:27,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:27,831 INFO L482 AbstractCegarLoop]: Abstraction has 10409 states and 30517 transitions. [2021-07-09 18:38:27,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 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 18:38:27,831 INFO L276 IsEmpty]: Start isEmpty. Operand 10409 states and 30517 transitions. [2021-07-09 18:38:27,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:38:27,844 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:27,844 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:28,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-09 18:38:28,045 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:28,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:28,045 INFO L82 PathProgramCache]: Analyzing trace with hash 2120048080, now seen corresponding path program 71 times [2021-07-09 18:38:28,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:28,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727341585] [2021-07-09 18:38:28,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:28,077 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:28,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:28,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727341585] [2021-07-09 18:38:28,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727341585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:28,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864530815] [2021-07-09 18:38:28,078 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 18:38:28,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:38:28,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:28,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:38:28,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:28,189 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:28,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864530815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:28,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:28,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:38:28,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099364530] [2021-07-09 18:38:28,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:38:28,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:28,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:38:28,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:38:28,190 INFO L87 Difference]: Start difference. First operand 10409 states and 30517 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 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 18:38:28,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:28,644 INFO L93 Difference]: Finished difference Result 17849 states and 51482 transitions. [2021-07-09 18:38:28,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:38:28,644 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 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 37 [2021-07-09 18:38:28,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:28,678 INFO L225 Difference]: With dead ends: 17849 [2021-07-09 18:38:28,678 INFO L226 Difference]: Without dead ends: 17735 [2021-07-09 18:38:28,678 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 341.9ms TimeCoverageRelationStatistics Valid=512, Invalid=1210, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:38:28,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17735 states. [2021-07-09 18:38:28,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17735 to 11709. [2021-07-09 18:38:28,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11709 states, 11708 states have (on average 2.949180047830543) internal successors, (34529), 11708 states have internal predecessors, (34529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:28,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11709 states to 11709 states and 34529 transitions. [2021-07-09 18:38:28,950 INFO L78 Accepts]: Start accepts. Automaton has 11709 states and 34529 transitions. Word has length 37 [2021-07-09 18:38:28,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:28,950 INFO L482 AbstractCegarLoop]: Abstraction has 11709 states and 34529 transitions. [2021-07-09 18:38:28,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 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 18:38:28,950 INFO L276 IsEmpty]: Start isEmpty. Operand 11709 states and 34529 transitions. [2021-07-09 18:38:28,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:38:28,966 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:28,966 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:29,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-07-09 18:38:29,167 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:29,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:29,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1923457314, now seen corresponding path program 72 times [2021-07-09 18:38:29,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:29,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080486649] [2021-07-09 18:38:29,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:29,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:29,189 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:29,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:29,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080486649] [2021-07-09 18:38:29,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080486649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:29,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978538321] [2021-07-09 18:38:29,189 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 18:38:29,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:38:29,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:29,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:38:29,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:29,296 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:29,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978538321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:29,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:29,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-07-09 18:38:29,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877768811] [2021-07-09 18:38:29,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:38:29,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:29,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:38:29,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:38:29,297 INFO L87 Difference]: Start difference. First operand 11709 states and 34529 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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 18:38:29,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:29,727 INFO L93 Difference]: Finished difference Result 21184 states and 60988 transitions. [2021-07-09 18:38:29,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:38:29,727 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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 37 [2021-07-09 18:38:29,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:29,765 INFO L225 Difference]: With dead ends: 21184 [2021-07-09 18:38:29,765 INFO L226 Difference]: Without dead ends: 21177 [2021-07-09 18:38:29,765 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 287.2ms TimeCoverageRelationStatistics Valid=546, Invalid=1014, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:38:29,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21177 states. [2021-07-09 18:38:30,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21177 to 14606. [2021-07-09 18:38:30,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14606 states, 14605 states have (on average 2.9456350564875042) internal successors, (43021), 14605 states have internal predecessors, (43021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:30,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14606 states to 14606 states and 43021 transitions. [2021-07-09 18:38:30,123 INFO L78 Accepts]: Start accepts. Automaton has 14606 states and 43021 transitions. Word has length 37 [2021-07-09 18:38:30,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:30,124 INFO L482 AbstractCegarLoop]: Abstraction has 14606 states and 43021 transitions. [2021-07-09 18:38:30,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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 18:38:30,124 INFO L276 IsEmpty]: Start isEmpty. Operand 14606 states and 43021 transitions. [2021-07-09 18:38:30,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:38:30,144 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:30,144 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:30,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:30,345 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:30,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:30,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1994538828, now seen corresponding path program 73 times [2021-07-09 18:38:30,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:30,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367870995] [2021-07-09 18:38:30,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:30,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:30,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367870995] [2021-07-09 18:38:30,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367870995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:30,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594468457] [2021-07-09 18:38:30,374 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 18:38:30,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:30,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:38:30,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:30,483 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:30,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594468457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:30,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:30,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-07-09 18:38:30,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250952771] [2021-07-09 18:38:30,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:38:30,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:30,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:38:30,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:38:30,484 INFO L87 Difference]: Start difference. First operand 14606 states and 43021 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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 18:38:30,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:30,758 INFO L93 Difference]: Finished difference Result 15856 states and 46020 transitions. [2021-07-09 18:38:30,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:38:30,758 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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 37 [2021-07-09 18:38:30,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:30,786 INFO L225 Difference]: With dead ends: 15856 [2021-07-09 18:38:30,786 INFO L226 Difference]: Without dead ends: 15842 [2021-07-09 18:38:30,787 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 153.5ms TimeCoverageRelationStatistics Valid=194, Invalid=562, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:38:30,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15842 states. [2021-07-09 18:38:30,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15842 to 14446. [2021-07-09 18:38:31,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14446 states, 14445 states have (on average 2.94932502596054) internal successors, (42603), 14445 states have internal predecessors, (42603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:31,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14446 states to 14446 states and 42603 transitions. [2021-07-09 18:38:31,038 INFO L78 Accepts]: Start accepts. Automaton has 14446 states and 42603 transitions. Word has length 37 [2021-07-09 18:38:31,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:31,038 INFO L482 AbstractCegarLoop]: Abstraction has 14446 states and 42603 transitions. [2021-07-09 18:38:31,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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 18:38:31,039 INFO L276 IsEmpty]: Start isEmpty. Operand 14446 states and 42603 transitions. [2021-07-09 18:38:31,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:38:31,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:31,059 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:31,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:31,259 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:31,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:31,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1971300784, now seen corresponding path program 74 times [2021-07-09 18:38:31,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:31,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470136874] [2021-07-09 18:38:31,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:31,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:31,288 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:38:31,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:31,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470136874] [2021-07-09 18:38:31,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470136874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:31,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760329467] [2021-07-09 18:38:31,288 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 18:38:31,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:38:31,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:31,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:38:31,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:31,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760329467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:31,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:31,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-07-09 18:38:31,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656616133] [2021-07-09 18:38:31,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:38:31,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:31,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:38:31,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:38:31,407 INFO L87 Difference]: Start difference. First operand 14446 states and 42603 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 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 18:38:31,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:31,800 INFO L93 Difference]: Finished difference Result 19655 states and 57129 transitions. [2021-07-09 18:38:31,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:38:31,801 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 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 37 [2021-07-09 18:38:31,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:31,838 INFO L225 Difference]: With dead ends: 19655 [2021-07-09 18:38:31,839 INFO L226 Difference]: Without dead ends: 19625 [2021-07-09 18:38:31,839 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 250.9ms TimeCoverageRelationStatistics Valid=386, Invalid=874, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:38:31,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19625 states. [2021-07-09 18:38:32,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19625 to 17272. [2021-07-09 18:38:32,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17272 states, 17271 states have (on average 2.963927971744543) internal successors, (51190), 17271 states have internal predecessors, (51190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:32,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17272 states to 17272 states and 51190 transitions. [2021-07-09 18:38:32,196 INFO L78 Accepts]: Start accepts. Automaton has 17272 states and 51190 transitions. Word has length 37 [2021-07-09 18:38:32,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:32,196 INFO L482 AbstractCegarLoop]: Abstraction has 17272 states and 51190 transitions. [2021-07-09 18:38:32,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 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 18:38:32,196 INFO L276 IsEmpty]: Start isEmpty. Operand 17272 states and 51190 transitions. [2021-07-09 18:38:32,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:38:32,220 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:32,220 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:32,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-07-09 18:38:32,420 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:32,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:32,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1535121346, now seen corresponding path program 75 times [2021-07-09 18:38:32,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:32,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715546571] [2021-07-09 18:38:32,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:32,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:32,447 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:32,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:32,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715546571] [2021-07-09 18:38:32,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715546571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:32,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752761961] [2021-07-09 18:38:32,447 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 18:38:32,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:38:32,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:32,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:38:32,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:32,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752761961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:32,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:32,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 18:38:32,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863648299] [2021-07-09 18:38:32,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:38:32,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:32,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:38:32,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:38:32,564 INFO L87 Difference]: Start difference. First operand 17272 states and 51190 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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 18:38:32,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:32,894 INFO L93 Difference]: Finished difference Result 20092 states and 58489 transitions. [2021-07-09 18:38:32,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:38:32,894 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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 37 [2021-07-09 18:38:32,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:32,932 INFO L225 Difference]: With dead ends: 20092 [2021-07-09 18:38:32,932 INFO L226 Difference]: Without dead ends: 20029 [2021-07-09 18:38:32,932 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 174.5ms TimeCoverageRelationStatistics Valid=237, Invalid=693, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:38:32,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20029 states. [2021-07-09 18:38:33,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20029 to 17180. [2021-07-09 18:38:33,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17180 states, 17179 states have (on average 2.957913731881949) internal successors, (50814), 17179 states have internal predecessors, (50814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:33,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17180 states to 17180 states and 50814 transitions. [2021-07-09 18:38:33,349 INFO L78 Accepts]: Start accepts. Automaton has 17180 states and 50814 transitions. Word has length 37 [2021-07-09 18:38:33,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:33,349 INFO L482 AbstractCegarLoop]: Abstraction has 17180 states and 50814 transitions. [2021-07-09 18:38:33,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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 18:38:33,349 INFO L276 IsEmpty]: Start isEmpty. Operand 17180 states and 50814 transitions. [2021-07-09 18:38:33,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:38:33,372 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:33,372 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:33,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:33,572 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:33,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:33,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1028118072, now seen corresponding path program 76 times [2021-07-09 18:38:33,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:33,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6141674] [2021-07-09 18:38:33,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:33,597 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:38:33,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:33,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6141674] [2021-07-09 18:38:33,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6141674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:33,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248912544] [2021-07-09 18:38:33,598 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 18:38:33,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:38:33,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:33,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:38:33,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:33,794 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:33,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248912544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:33,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:33,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 18:38:33,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813196161] [2021-07-09 18:38:33,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:38:33,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:33,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:38:33,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:38:33,795 INFO L87 Difference]: Start difference. First operand 17180 states and 50814 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 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 18:38:34,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:34,152 INFO L93 Difference]: Finished difference Result 20914 states and 60232 transitions. [2021-07-09 18:38:34,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:38:34,153 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 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 37 [2021-07-09 18:38:34,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:34,189 INFO L225 Difference]: With dead ends: 20914 [2021-07-09 18:38:34,190 INFO L226 Difference]: Without dead ends: 20914 [2021-07-09 18:38:34,190 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 199.9ms TimeCoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:38:34,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20914 states. [2021-07-09 18:38:34,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20914 to 17066. [2021-07-09 18:38:34,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17066 states, 17065 states have (on average 2.9520656314093174) internal successors, (50377), 17065 states have internal predecessors, (50377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:34,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17066 states to 17066 states and 50377 transitions. [2021-07-09 18:38:34,569 INFO L78 Accepts]: Start accepts. Automaton has 17066 states and 50377 transitions. Word has length 37 [2021-07-09 18:38:34,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:34,569 INFO L482 AbstractCegarLoop]: Abstraction has 17066 states and 50377 transitions. [2021-07-09 18:38:34,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 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 18:38:34,570 INFO L276 IsEmpty]: Start isEmpty. Operand 17066 states and 50377 transitions. [2021-07-09 18:38:34,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:38:34,595 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:34,595 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:34,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:34,796 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:34,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:34,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1338371294, now seen corresponding path program 77 times [2021-07-09 18:38:34,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:34,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528978195] [2021-07-09 18:38:34,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:34,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:34,822 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:38:34,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:34,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528978195] [2021-07-09 18:38:34,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528978195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:34,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959255024] [2021-07-09 18:38:34,822 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:38:34,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:38:34,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:34,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:38:34,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:34,944 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:34,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959255024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:34,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:34,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 18:38:34,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472247579] [2021-07-09 18:38:34,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:38:34,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:34,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:38:34,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:38:34,945 INFO L87 Difference]: Start difference. First operand 17066 states and 50377 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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 18:38:35,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:35,411 INFO L93 Difference]: Finished difference Result 20100 states and 58146 transitions. [2021-07-09 18:38:35,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:38:35,412 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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 37 [2021-07-09 18:38:35,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:35,449 INFO L225 Difference]: With dead ends: 20100 [2021-07-09 18:38:35,449 INFO L226 Difference]: Without dead ends: 20052 [2021-07-09 18:38:35,449 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 244.8ms TimeCoverageRelationStatistics Valid=379, Invalid=953, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:38:35,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20052 states. [2021-07-09 18:38:35,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20052 to 17066. [2021-07-09 18:38:35,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17066 states, 17065 states have (on average 2.9480808672721945) internal successors, (50309), 17065 states have internal predecessors, (50309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:35,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17066 states to 17066 states and 50309 transitions. [2021-07-09 18:38:35,768 INFO L78 Accepts]: Start accepts. Automaton has 17066 states and 50309 transitions. Word has length 37 [2021-07-09 18:38:35,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:35,768 INFO L482 AbstractCegarLoop]: Abstraction has 17066 states and 50309 transitions. [2021-07-09 18:38:35,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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 18:38:35,768 INFO L276 IsEmpty]: Start isEmpty. Operand 17066 states and 50309 transitions. [2021-07-09 18:38:35,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:38:35,793 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:35,793 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:35,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:35,993 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:35,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:35,994 INFO L82 PathProgramCache]: Analyzing trace with hash 451443562, now seen corresponding path program 78 times [2021-07-09 18:38:35,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:35,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820114483] [2021-07-09 18:38:35,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:35,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:36,018 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:38:36,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:36,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820114483] [2021-07-09 18:38:36,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820114483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:36,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222615990] [2021-07-09 18:38:36,018 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) [2021-07-09 18:38:36,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:38:36,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:36,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:38:36,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:36,250 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:36,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222615990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:36,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:36,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-07-09 18:38:36,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169898869] [2021-07-09 18:38:36,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:38:36,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:36,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:38:36,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:38:36,251 INFO L87 Difference]: Start difference. First operand 17066 states and 50309 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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 18:38:36,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:36,596 INFO L93 Difference]: Finished difference Result 23441 states and 67906 transitions. [2021-07-09 18:38:36,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:38:36,597 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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 37 [2021-07-09 18:38:36,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:36,639 INFO L225 Difference]: With dead ends: 23441 [2021-07-09 18:38:36,639 INFO L226 Difference]: Without dead ends: 23441 [2021-07-09 18:38:36,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 316.1ms TimeCoverageRelationStatistics Valid=308, Invalid=684, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:38:36,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23441 states. [2021-07-09 18:38:37,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23441 to 21266. [2021-07-09 18:38:37,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21266 states, 21265 states have (on average 2.9432870914648483) internal successors, (62589), 21265 states have internal predecessors, (62589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:37,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21266 states to 21266 states and 62589 transitions. [2021-07-09 18:38:37,081 INFO L78 Accepts]: Start accepts. Automaton has 21266 states and 62589 transitions. Word has length 37 [2021-07-09 18:38:37,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:37,082 INFO L482 AbstractCegarLoop]: Abstraction has 21266 states and 62589 transitions. [2021-07-09 18:38:37,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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 18:38:37,082 INFO L276 IsEmpty]: Start isEmpty. Operand 21266 states and 62589 transitions. [2021-07-09 18:38:37,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:38:37,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:37,110 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:37,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:37,319 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:37,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:37,319 INFO L82 PathProgramCache]: Analyzing trace with hash 592527180, now seen corresponding path program 79 times [2021-07-09 18:38:37,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:37,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185995154] [2021-07-09 18:38:37,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:37,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:37,339 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:37,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:37,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185995154] [2021-07-09 18:38:37,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185995154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:37,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033174491] [2021-07-09 18:38:37,340 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 18:38:37,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:37,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:38:37,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:37,459 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:37,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033174491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:37,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:37,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-07-09 18:38:37,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460031011] [2021-07-09 18:38:37,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:38:37,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:37,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:38:37,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:38:37,460 INFO L87 Difference]: Start difference. First operand 21266 states and 62589 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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 18:38:37,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:37,778 INFO L93 Difference]: Finished difference Result 23280 states and 67487 transitions. [2021-07-09 18:38:37,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:38:37,778 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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 37 [2021-07-09 18:38:37,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:37,823 INFO L225 Difference]: With dead ends: 23280 [2021-07-09 18:38:37,823 INFO L226 Difference]: Without dead ends: 23266 [2021-07-09 18:38:37,823 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 166.7ms TimeCoverageRelationStatistics Valid=186, Invalid=464, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:38:37,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23266 states. [2021-07-09 18:38:38,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23266 to 21266. [2021-07-09 18:38:38,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21266 states, 21265 states have (on average 2.9401833999529745) internal successors, (62523), 21265 states have internal predecessors, (62523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:38,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21266 states to 21266 states and 62523 transitions. [2021-07-09 18:38:38,353 INFO L78 Accepts]: Start accepts. Automaton has 21266 states and 62523 transitions. Word has length 37 [2021-07-09 18:38:38,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:38,353 INFO L482 AbstractCegarLoop]: Abstraction has 21266 states and 62523 transitions. [2021-07-09 18:38:38,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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 18:38:38,353 INFO L276 IsEmpty]: Start isEmpty. Operand 21266 states and 62523 transitions. [2021-07-09 18:38:38,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:38:38,383 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:38,383 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:38,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-07-09 18:38:38,597 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:38,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:38,597 INFO L82 PathProgramCache]: Analyzing trace with hash 676925954, now seen corresponding path program 80 times [2021-07-09 18:38:38,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:38,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063275000] [2021-07-09 18:38:38,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:38,624 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:38:38,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:38,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063275000] [2021-07-09 18:38:38,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063275000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:38,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677086765] [2021-07-09 18:38:38,625 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 18:38:38,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:38:38,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:38,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:38:38,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:38,737 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:38,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677086765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:38,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:38,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 18:38:38,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962824692] [2021-07-09 18:38:38,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:38:38,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:38,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:38:38,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:38:38,738 INFO L87 Difference]: Start difference. First operand 21266 states and 62523 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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 18:38:39,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:39,164 INFO L93 Difference]: Finished difference Result 24705 states and 71536 transitions. [2021-07-09 18:38:39,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:38:39,165 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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 37 [2021-07-09 18:38:39,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:39,212 INFO L225 Difference]: With dead ends: 24705 [2021-07-09 18:38:39,212 INFO L226 Difference]: Without dead ends: 24649 [2021-07-09 18:38:39,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 181.4ms TimeCoverageRelationStatistics Valid=216, Invalid=596, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:38:39,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24649 states. [2021-07-09 18:38:39,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24649 to 22536. [2021-07-09 18:38:39,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22536 states, 22535 states have (on average 2.9332149988906147) internal successors, (66100), 22535 states have internal predecessors, (66100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:39,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22536 states to 22536 states and 66100 transitions. [2021-07-09 18:38:39,643 INFO L78 Accepts]: Start accepts. Automaton has 22536 states and 66100 transitions. Word has length 37 [2021-07-09 18:38:39,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:39,643 INFO L482 AbstractCegarLoop]: Abstraction has 22536 states and 66100 transitions. [2021-07-09 18:38:39,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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 18:38:39,643 INFO L276 IsEmpty]: Start isEmpty. Operand 22536 states and 66100 transitions. [2021-07-09 18:38:39,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:38:39,675 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:39,675 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:39,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-09 18:38:39,876 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:39,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:39,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1978003832, now seen corresponding path program 81 times [2021-07-09 18:38:39,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:39,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411902300] [2021-07-09 18:38:39,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:39,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:39,923 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:39,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:39,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411902300] [2021-07-09 18:38:39,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411902300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:39,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272413047] [2021-07-09 18:38:39,923 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 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 18:38:39,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:38:39,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:39,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:38:39,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:40,034 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:40,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272413047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:40,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:40,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:38:40,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064342471] [2021-07-09 18:38:40,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:38:40,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:40,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:38:40,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:38:40,035 INFO L87 Difference]: Start difference. First operand 22536 states and 66100 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 18:38:40,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:40,601 INFO L93 Difference]: Finished difference Result 25861 states and 74940 transitions. [2021-07-09 18:38:40,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:38:40,601 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 37 [2021-07-09 18:38:40,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:40,653 INFO L225 Difference]: With dead ends: 25861 [2021-07-09 18:38:40,653 INFO L226 Difference]: Without dead ends: 25763 [2021-07-09 18:38:40,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 202.7ms TimeCoverageRelationStatistics Valid=288, Invalid=834, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:38:40,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25763 states. [2021-07-09 18:38:41,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25763 to 23892. [2021-07-09 18:38:41,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23892 states, 23891 states have (on average 2.935582436900925) internal successors, (70134), 23891 states have internal predecessors, (70134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:41,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23892 states to 23892 states and 70134 transitions. [2021-07-09 18:38:41,120 INFO L78 Accepts]: Start accepts. Automaton has 23892 states and 70134 transitions. Word has length 37 [2021-07-09 18:38:41,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:41,121 INFO L482 AbstractCegarLoop]: Abstraction has 23892 states and 70134 transitions. [2021-07-09 18:38:41,121 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 18:38:41,121 INFO L276 IsEmpty]: Start isEmpty. Operand 23892 states and 70134 transitions. [2021-07-09 18:38:41,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:38:41,240 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:41,241 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:41,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-09 18:38:41,441 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:41,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:41,441 INFO L82 PathProgramCache]: Analyzing trace with hash -865916238, now seen corresponding path program 82 times [2021-07-09 18:38:41,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:41,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163572287] [2021-07-09 18:38:41,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:41,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:41,473 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:41,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:41,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163572287] [2021-07-09 18:38:41,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163572287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:41,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141435675] [2021-07-09 18:38:41,474 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 18:38:41,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:38:41,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:41,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:38:41,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:41,585 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:41,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141435675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:41,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:41,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:38:41,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411199905] [2021-07-09 18:38:41,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:38:41,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:41,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:38:41,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:38:41,586 INFO L87 Difference]: Start difference. First operand 23892 states and 70134 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 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 18:38:42,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:42,043 INFO L93 Difference]: Finished difference Result 27875 states and 80321 transitions. [2021-07-09 18:38:42,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:38:42,044 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 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 37 [2021-07-09 18:38:42,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:42,096 INFO L225 Difference]: With dead ends: 27875 [2021-07-09 18:38:42,097 INFO L226 Difference]: Without dead ends: 27875 [2021-07-09 18:38:42,097 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 243.5ms TimeCoverageRelationStatistics Valid=371, Invalid=961, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:38:42,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27875 states. [2021-07-09 18:38:42,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27875 to 23948. [2021-07-09 18:38:42,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23948 states, 23947 states have (on average 2.9341462396124776) internal successors, (70264), 23947 states have internal predecessors, (70264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:42,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23948 states to 23948 states and 70264 transitions. [2021-07-09 18:38:42,551 INFO L78 Accepts]: Start accepts. Automaton has 23948 states and 70264 transitions. Word has length 37 [2021-07-09 18:38:42,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:42,552 INFO L482 AbstractCegarLoop]: Abstraction has 23948 states and 70264 transitions. [2021-07-09 18:38:42,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 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 18:38:42,552 INFO L276 IsEmpty]: Start isEmpty. Operand 23948 states and 70264 transitions. [2021-07-09 18:38:42,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:38:42,582 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:42,582 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:42,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:42,783 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:42,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:42,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1500573128, now seen corresponding path program 83 times [2021-07-09 18:38:42,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:42,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505776054] [2021-07-09 18:38:42,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:42,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:42,812 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:42,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:42,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505776054] [2021-07-09 18:38:42,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505776054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:42,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876133102] [2021-07-09 18:38:42,812 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 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 18:38:42,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:38:42,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:42,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:38:42,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:42,912 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:42,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876133102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:42,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:42,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:38:42,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516492600] [2021-07-09 18:38:42,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:38:42,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:42,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:38:42,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:38:42,913 INFO L87 Difference]: Start difference. First operand 23948 states and 70264 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 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 18:38:43,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:43,443 INFO L93 Difference]: Finished difference Result 27736 states and 80333 transitions. [2021-07-09 18:38:43,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:38:43,443 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 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 37 [2021-07-09 18:38:43,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:43,501 INFO L225 Difference]: With dead ends: 27736 [2021-07-09 18:38:43,501 INFO L226 Difference]: Without dead ends: 27682 [2021-07-09 18:38:43,502 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 336.4ms TimeCoverageRelationStatistics Valid=475, Invalid=1007, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:38:43,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27682 states. [2021-07-09 18:38:43,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27682 to 23344. [2021-07-09 18:38:43,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23344 states, 23343 states have (on average 2.927044510131517) internal successors, (68326), 23343 states have internal predecessors, (68326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:44,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23344 states to 23344 states and 68326 transitions. [2021-07-09 18:38:44,015 INFO L78 Accepts]: Start accepts. Automaton has 23344 states and 68326 transitions. Word has length 37 [2021-07-09 18:38:44,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:44,015 INFO L482 AbstractCegarLoop]: Abstraction has 23344 states and 68326 transitions. [2021-07-09 18:38:44,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 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 18:38:44,015 INFO L276 IsEmpty]: Start isEmpty. Operand 23344 states and 68326 transitions. [2021-07-09 18:38:44,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:38:44,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:44,128 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:44,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-07-09 18:38:44,328 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:44,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:44,329 INFO L82 PathProgramCache]: Analyzing trace with hash 685913988, now seen corresponding path program 84 times [2021-07-09 18:38:44,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:44,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965895019] [2021-07-09 18:38:44,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:44,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:44,354 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:44,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:44,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965895019] [2021-07-09 18:38:44,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965895019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:44,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978615320] [2021-07-09 18:38:44,354 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 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 18:38:44,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:38:44,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:44,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:38:44,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:44,455 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:44,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978615320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:44,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:44,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 18:38:44,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499283928] [2021-07-09 18:38:44,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:38:44,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:44,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:38:44,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:38:44,456 INFO L87 Difference]: Start difference. First operand 23344 states and 68326 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:44,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:44,993 INFO L93 Difference]: Finished difference Result 29936 states and 86164 transitions. [2021-07-09 18:38:44,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:38:44,993 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:38:44,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:45,055 INFO L225 Difference]: With dead ends: 29936 [2021-07-09 18:38:45,056 INFO L226 Difference]: Without dead ends: 29929 [2021-07-09 18:38:45,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 315.1ms TimeCoverageRelationStatistics Valid=603, Invalid=1119, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:38:45,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29929 states. [2021-07-09 18:38:45,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29929 to 24778. [2021-07-09 18:38:45,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24778 states, 24777 states have (on average 2.9320337409694477) internal successors, (72647), 24777 states have internal predecessors, (72647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:45,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24778 states to 24778 states and 72647 transitions. [2021-07-09 18:38:45,656 INFO L78 Accepts]: Start accepts. Automaton has 24778 states and 72647 transitions. Word has length 37 [2021-07-09 18:38:45,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:45,656 INFO L482 AbstractCegarLoop]: Abstraction has 24778 states and 72647 transitions. [2021-07-09 18:38:45,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:45,656 INFO L276 IsEmpty]: Start isEmpty. Operand 24778 states and 72647 transitions. [2021-07-09 18:38:45,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:38:45,689 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:45,689 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:45,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-07-09 18:38:45,890 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:45,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:45,890 INFO L82 PathProgramCache]: Analyzing trace with hash 308942834, now seen corresponding path program 85 times [2021-07-09 18:38:45,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:45,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015003625] [2021-07-09 18:38:45,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:45,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:45,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:45,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015003625] [2021-07-09 18:38:45,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015003625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:45,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645074500] [2021-07-09 18:38:45,918 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 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 18:38:45,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:45,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:38:45,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:46,043 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:46,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645074500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:46,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:46,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 18:38:46,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302253824] [2021-07-09 18:38:46,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:38:46,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:46,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:38:46,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:38:46,044 INFO L87 Difference]: Start difference. First operand 24778 states and 72647 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:46,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:46,408 INFO L93 Difference]: Finished difference Result 27753 states and 80201 transitions. [2021-07-09 18:38:46,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:38:46,409 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:38:46,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:46,469 INFO L225 Difference]: With dead ends: 27753 [2021-07-09 18:38:46,469 INFO L226 Difference]: Without dead ends: 27732 [2021-07-09 18:38:46,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 181.6ms TimeCoverageRelationStatistics Valid=222, Invalid=648, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:38:46,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27732 states. [2021-07-09 18:38:46,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27732 to 24300. [2021-07-09 18:38:46,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24300 states, 24299 states have (on average 2.930490966706449) internal successors, (71208), 24299 states have internal predecessors, (71208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:47,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24300 states to 24300 states and 71208 transitions. [2021-07-09 18:38:47,021 INFO L78 Accepts]: Start accepts. Automaton has 24300 states and 71208 transitions. Word has length 37 [2021-07-09 18:38:47,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:47,021 INFO L482 AbstractCegarLoop]: Abstraction has 24300 states and 71208 transitions. [2021-07-09 18:38:47,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:47,021 INFO L276 IsEmpty]: Start isEmpty. Operand 24300 states and 71208 transitions. [2021-07-09 18:38:47,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:38:47,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:47,052 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:47,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:47,252 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:47,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:47,253 INFO L82 PathProgramCache]: Analyzing trace with hash 258861524, now seen corresponding path program 86 times [2021-07-09 18:38:47,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:47,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106017489] [2021-07-09 18:38:47,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:47,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:47,280 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:47,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:47,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106017489] [2021-07-09 18:38:47,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106017489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:47,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158711985] [2021-07-09 18:38:47,280 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 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 18:38:47,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:38:47,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:47,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:38:47,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:47,384 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:47,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158711985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:47,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:47,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 18:38:47,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047641205] [2021-07-09 18:38:47,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:38:47,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:47,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:38:47,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:38:47,385 INFO L87 Difference]: Start difference. First operand 24300 states and 71208 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:47,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:47,808 INFO L93 Difference]: Finished difference Result 28646 states and 82626 transitions. [2021-07-09 18:38:47,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:38:47,808 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:38:47,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:47,870 INFO L225 Difference]: With dead ends: 28646 [2021-07-09 18:38:47,870 INFO L226 Difference]: Without dead ends: 28590 [2021-07-09 18:38:47,870 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 261.9ms TimeCoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:38:47,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28590 states. [2021-07-09 18:38:48,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28590 to 24644. [2021-07-09 18:38:48,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24644 states, 24643 states have (on average 2.9266728888528184) internal successors, (72122), 24643 states have internal predecessors, (72122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:48,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24644 states to 24644 states and 72122 transitions. [2021-07-09 18:38:48,469 INFO L78 Accepts]: Start accepts. Automaton has 24644 states and 72122 transitions. Word has length 37 [2021-07-09 18:38:48,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:48,469 INFO L482 AbstractCegarLoop]: Abstraction has 24644 states and 72122 transitions. [2021-07-09 18:38:48,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:48,469 INFO L276 IsEmpty]: Start isEmpty. Operand 24644 states and 72122 transitions. [2021-07-09 18:38:48,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:38:48,503 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:48,503 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:48,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:48,703 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:48,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:48,703 INFO L82 PathProgramCache]: Analyzing trace with hash 613645396, now seen corresponding path program 87 times [2021-07-09 18:38:48,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:48,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250831908] [2021-07-09 18:38:48,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:48,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:48,728 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:38:48,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:48,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250831908] [2021-07-09 18:38:48,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250831908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:48,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567930626] [2021-07-09 18:38:48,728 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 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 18:38:48,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:38:48,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:48,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:38:48,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:48,855 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:48,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567930626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:48,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:48,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 18:38:48,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836022206] [2021-07-09 18:38:48,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:38:48,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:48,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:38:48,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:38:48,856 INFO L87 Difference]: Start difference. First operand 24644 states and 72122 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 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 18:38:49,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:49,343 INFO L93 Difference]: Finished difference Result 30237 states and 87214 transitions. [2021-07-09 18:38:49,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:38:49,343 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 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 37 [2021-07-09 18:38:49,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:49,408 INFO L225 Difference]: With dead ends: 30237 [2021-07-09 18:38:49,408 INFO L226 Difference]: Without dead ends: 30237 [2021-07-09 18:38:49,408 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 275.3ms TimeCoverageRelationStatistics Valid=397, Invalid=935, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:38:49,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30237 states. [2021-07-09 18:38:49,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30237 to 26462. [2021-07-09 18:38:50,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26462 states, 26461 states have (on average 2.9321265258304674) internal successors, (77587), 26461 states have internal predecessors, (77587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:50,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26462 states to 26462 states and 77587 transitions. [2021-07-09 18:38:50,095 INFO L78 Accepts]: Start accepts. Automaton has 26462 states and 77587 transitions. Word has length 37 [2021-07-09 18:38:50,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:50,095 INFO L482 AbstractCegarLoop]: Abstraction has 26462 states and 77587 transitions. [2021-07-09 18:38:50,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 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 18:38:50,095 INFO L276 IsEmpty]: Start isEmpty. Operand 26462 states and 77587 transitions. [2021-07-09 18:38:50,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:38:50,130 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:50,130 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:50,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:50,337 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:50,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:50,337 INFO L82 PathProgramCache]: Analyzing trace with hash 402948350, now seen corresponding path program 88 times [2021-07-09 18:38:50,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:50,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210010] [2021-07-09 18:38:50,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:50,363 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:38:50,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:50,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210010] [2021-07-09 18:38:50,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:50,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216103711] [2021-07-09 18:38:50,364 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 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 18:38:50,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:38:50,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:50,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:38:50,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:50,485 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:50,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216103711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:50,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:50,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 18:38:50,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455684181] [2021-07-09 18:38:50,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:38:50,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:50,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:38:50,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:38:50,486 INFO L87 Difference]: Start difference. First operand 26462 states and 77587 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:50,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:50,973 INFO L93 Difference]: Finished difference Result 29627 states and 86019 transitions. [2021-07-09 18:38:50,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:38:50,973 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:38:50,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:51,033 INFO L225 Difference]: With dead ends: 29627 [2021-07-09 18:38:51,033 INFO L226 Difference]: Without dead ends: 29615 [2021-07-09 18:38:51,033 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 199.9ms TimeCoverageRelationStatistics Valid=321, Invalid=671, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:38:51,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29615 states. [2021-07-09 18:38:51,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29615 to 27386. [2021-07-09 18:38:51,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27386 states, 27385 states have (on average 2.9343436187693994) internal successors, (80357), 27385 states have internal predecessors, (80357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:51,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27386 states to 27386 states and 80357 transitions. [2021-07-09 18:38:51,691 INFO L78 Accepts]: Start accepts. Automaton has 27386 states and 80357 transitions. Word has length 37 [2021-07-09 18:38:51,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:51,691 INFO L482 AbstractCegarLoop]: Abstraction has 27386 states and 80357 transitions. [2021-07-09 18:38:51,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:51,691 INFO L276 IsEmpty]: Start isEmpty. Operand 27386 states and 80357 transitions. [2021-07-09 18:38:51,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:38:51,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:51,730 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:51,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-07-09 18:38:51,931 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:51,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:51,931 INFO L82 PathProgramCache]: Analyzing trace with hash 754729014, now seen corresponding path program 89 times [2021-07-09 18:38:51,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:51,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850681878] [2021-07-09 18:38:51,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:51,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:51,970 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:38:51,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:51,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850681878] [2021-07-09 18:38:51,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850681878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:51,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304554274] [2021-07-09 18:38:51,970 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 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 18:38:51,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:38:52,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:52,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:38:52,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:52,102 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:52,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304554274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:52,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:52,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 18:38:52,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844608198] [2021-07-09 18:38:52,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:38:52,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:52,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:38:52,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:38:52,102 INFO L87 Difference]: Start difference. First operand 27386 states and 80357 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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 18:38:52,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:52,489 INFO L93 Difference]: Finished difference Result 30942 states and 89428 transitions. [2021-07-09 18:38:52,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:38:52,489 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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 37 [2021-07-09 18:38:52,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:52,553 INFO L225 Difference]: With dead ends: 30942 [2021-07-09 18:38:52,554 INFO L226 Difference]: Without dead ends: 30928 [2021-07-09 18:38:52,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 177.5ms TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:38:52,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30928 states. [2021-07-09 18:38:53,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30928 to 26470. [2021-07-09 18:38:53,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26470 states, 26469 states have (on average 2.926782273603083) internal successors, (77469), 26469 states have internal predecessors, (77469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:53,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26470 states to 26470 states and 77469 transitions. [2021-07-09 18:38:53,172 INFO L78 Accepts]: Start accepts. Automaton has 26470 states and 77469 transitions. Word has length 37 [2021-07-09 18:38:53,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:53,172 INFO L482 AbstractCegarLoop]: Abstraction has 26470 states and 77469 transitions. [2021-07-09 18:38:53,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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 18:38:53,172 INFO L276 IsEmpty]: Start isEmpty. Operand 26470 states and 77469 transitions. [2021-07-09 18:38:53,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:38:53,207 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:53,207 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:53,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-07-09 18:38:53,407 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:53,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:53,407 INFO L82 PathProgramCache]: Analyzing trace with hash 839127788, now seen corresponding path program 90 times [2021-07-09 18:38:53,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:53,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263973788] [2021-07-09 18:38:53,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:53,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:53,441 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:38:53,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:53,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263973788] [2021-07-09 18:38:53,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263973788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:53,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335734892] [2021-07-09 18:38:53,442 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 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 18:38:53,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:38:53,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:53,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:38:53,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:53,548 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:53,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335734892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:53,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:53,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 18:38:53,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754651093] [2021-07-09 18:38:53,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:38:53,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:53,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:38:53,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:38:53,549 INFO L87 Difference]: Start difference. First operand 26470 states and 77469 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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 18:38:54,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:54,049 INFO L93 Difference]: Finished difference Result 35038 states and 101252 transitions. [2021-07-09 18:38:54,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:38:54,050 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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 37 [2021-07-09 18:38:54,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:54,128 INFO L225 Difference]: With dead ends: 35038 [2021-07-09 18:38:54,128 INFO L226 Difference]: Without dead ends: 34982 [2021-07-09 18:38:54,129 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 165.0ms TimeCoverageRelationStatistics Valid=207, Invalid=605, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:38:54,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34982 states. [2021-07-09 18:38:54,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34982 to 26896. [2021-07-09 18:38:54,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26896 states, 26895 states have (on average 2.923814835471277) internal successors, (78636), 26895 states have internal predecessors, (78636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:54,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26896 states to 26896 states and 78636 transitions. [2021-07-09 18:38:54,804 INFO L78 Accepts]: Start accepts. Automaton has 26896 states and 78636 transitions. Word has length 37 [2021-07-09 18:38:54,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:54,804 INFO L482 AbstractCegarLoop]: Abstraction has 26896 states and 78636 transitions. [2021-07-09 18:38:54,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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 18:38:54,804 INFO L276 IsEmpty]: Start isEmpty. Operand 26896 states and 78636 transitions. [2021-07-09 18:38:54,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:38:54,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:54,838 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:55,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-09 18:38:55,039 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:55,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:55,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1815801998, now seen corresponding path program 91 times [2021-07-09 18:38:55,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:55,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670359729] [2021-07-09 18:38:55,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:55,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:55,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:55,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670359729] [2021-07-09 18:38:55,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670359729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:55,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689941972] [2021-07-09 18:38:55,083 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 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 18:38:55,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:55,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:38:55,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:55,195 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:55,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689941972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:55,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:55,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:38:55,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778852073] [2021-07-09 18:38:55,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:38:55,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:55,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:38:55,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:38:55,196 INFO L87 Difference]: Start difference. First operand 26896 states and 78636 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:55,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:55,573 INFO L93 Difference]: Finished difference Result 34762 states and 100280 transitions. [2021-07-09 18:38:55,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:38:55,573 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:38:55,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:55,649 INFO L225 Difference]: With dead ends: 34762 [2021-07-09 18:38:55,650 INFO L226 Difference]: Without dead ends: 34664 [2021-07-09 18:38:55,650 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 200.7ms TimeCoverageRelationStatistics Valid=250, Invalid=742, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:38:55,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34664 states. [2021-07-09 18:38:56,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34664 to 28630. [2021-07-09 18:38:56,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28630 states, 28629 states have (on average 2.9249711830661216) internal successors, (83739), 28629 states have internal predecessors, (83739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:56,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28630 states to 28630 states and 83739 transitions. [2021-07-09 18:38:56,428 INFO L78 Accepts]: Start accepts. Automaton has 28630 states and 83739 transitions. Word has length 37 [2021-07-09 18:38:56,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:56,429 INFO L482 AbstractCegarLoop]: Abstraction has 28630 states and 83739 transitions. [2021-07-09 18:38:56,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:56,429 INFO L276 IsEmpty]: Start isEmpty. Operand 28630 states and 83739 transitions. [2021-07-09 18:38:56,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:38:56,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:56,470 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:56,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-07-09 18:38:56,670 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:56,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:56,671 INFO L82 PathProgramCache]: Analyzing trace with hash 930686374, now seen corresponding path program 92 times [2021-07-09 18:38:56,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:56,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902360398] [2021-07-09 18:38:56,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:56,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:56,698 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:56,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:56,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902360398] [2021-07-09 18:38:56,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902360398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:56,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510673199] [2021-07-09 18:38:56,699 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 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 18:38:56,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:38:56,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:56,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:38:56,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:56,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510673199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:56,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:56,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:38:56,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732709049] [2021-07-09 18:38:56,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:38:56,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:56,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:38:56,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:38:56,798 INFO L87 Difference]: Start difference. First operand 28630 states and 83739 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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 18:38:57,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:57,354 INFO L93 Difference]: Finished difference Result 36830 states and 106101 transitions. [2021-07-09 18:38:57,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:38:57,355 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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 37 [2021-07-09 18:38:57,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:57,431 INFO L225 Difference]: With dead ends: 36830 [2021-07-09 18:38:57,431 INFO L226 Difference]: Without dead ends: 36830 [2021-07-09 18:38:57,432 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 313.9ms TimeCoverageRelationStatistics Valid=578, Invalid=1314, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:38:57,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36830 states. [2021-07-09 18:38:58,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36830 to 29087. [2021-07-09 18:38:58,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29087 states, 29086 states have (on average 2.927009557862889) internal successors, (85135), 29086 states have internal predecessors, (85135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:58,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29087 states to 29087 states and 85135 transitions. [2021-07-09 18:38:58,215 INFO L78 Accepts]: Start accepts. Automaton has 29087 states and 85135 transitions. Word has length 37 [2021-07-09 18:38:58,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:58,215 INFO L482 AbstractCegarLoop]: Abstraction has 29087 states and 85135 transitions. [2021-07-09 18:38:58,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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 18:38:58,215 INFO L276 IsEmpty]: Start isEmpty. Operand 29087 states and 85135 transitions. [2021-07-09 18:38:58,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:38:58,256 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:58,256 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:58,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-09 18:38:58,457 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:58,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:58,457 INFO L82 PathProgramCache]: Analyzing trace with hash 719989328, now seen corresponding path program 93 times [2021-07-09 18:38:58,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:58,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146378358] [2021-07-09 18:38:58,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:58,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:58,487 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:58,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:58,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146378358] [2021-07-09 18:38:58,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146378358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:58,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854667694] [2021-07-09 18:38:58,488 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 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 18:38:58,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:38:58,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:58,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:38:58,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:58,580 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:58,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854667694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:58,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:58,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:38:58,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684834529] [2021-07-09 18:38:58,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:38:58,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:58,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:38:58,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:38:58,580 INFO L87 Difference]: Start difference. First operand 29087 states and 85135 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 18:38:58,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:58,999 INFO L93 Difference]: Finished difference Result 32333 states and 93601 transitions. [2021-07-09 18:38:58,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:38:58,999 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 37 [2021-07-09 18:38:58,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:59,070 INFO L225 Difference]: With dead ends: 32333 [2021-07-09 18:38:59,070 INFO L226 Difference]: Without dead ends: 32321 [2021-07-09 18:38:59,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 194.6ms TimeCoverageRelationStatistics Valid=389, Invalid=733, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:38:59,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32321 states. [2021-07-09 18:38:59,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32321 to 28821. [2021-07-09 18:38:59,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28821 states, 28820 states have (on average 2.9254684247050657) internal successors, (84312), 28820 states have internal predecessors, (84312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:59,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28821 states to 28821 states and 84312 transitions. [2021-07-09 18:38:59,771 INFO L78 Accepts]: Start accepts. Automaton has 28821 states and 84312 transitions. Word has length 37 [2021-07-09 18:38:59,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:59,771 INFO L482 AbstractCegarLoop]: Abstraction has 28821 states and 84312 transitions. [2021-07-09 18:38:59,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 18:38:59,771 INFO L276 IsEmpty]: Start isEmpty. Operand 28821 states and 84312 transitions. [2021-07-09 18:38:59,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:38:59,813 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:59,813 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:00,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-07-09 18:39:00,013 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:00,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:00,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1448741146, now seen corresponding path program 94 times [2021-07-09 18:39:00,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:00,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160525792] [2021-07-09 18:39:00,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:00,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:00,045 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:00,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:00,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160525792] [2021-07-09 18:39:00,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160525792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:00,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506355197] [2021-07-09 18:39:00,046 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 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 18:39:00,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:39:00,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:00,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:00,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:00,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506355197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:00,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:00,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:39:00,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193447817] [2021-07-09 18:39:00,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:39:00,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:00,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:39:00,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:39:00,140 INFO L87 Difference]: Start difference. First operand 28821 states and 84312 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 18:39:00,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:00,741 INFO L93 Difference]: Finished difference Result 33430 states and 96240 transitions. [2021-07-09 18:39:00,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:39:00,742 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 37 [2021-07-09 18:39:00,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:00,814 INFO L225 Difference]: With dead ends: 33430 [2021-07-09 18:39:00,814 INFO L226 Difference]: Without dead ends: 33423 [2021-07-09 18:39:00,814 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 348.1ms TimeCoverageRelationStatistics Valid=568, Invalid=1072, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:39:00,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33423 states. [2021-07-09 18:39:01,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33423 to 29449. [2021-07-09 18:39:01,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29449 states, 29448 states have (on average 2.9228470524314045) internal successors, (86072), 29448 states have internal predecessors, (86072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:01,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29449 states to 29449 states and 86072 transitions. [2021-07-09 18:39:01,535 INFO L78 Accepts]: Start accepts. Automaton has 29449 states and 86072 transitions. Word has length 37 [2021-07-09 18:39:01,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:01,535 INFO L482 AbstractCegarLoop]: Abstraction has 29449 states and 86072 transitions. [2021-07-09 18:39:01,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 18:39:01,536 INFO L276 IsEmpty]: Start isEmpty. Operand 29449 states and 86072 transitions. [2021-07-09 18:39:01,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:39:01,577 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:01,577 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:01,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-07-09 18:39:01,778 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:01,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:01,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1071769992, now seen corresponding path program 95 times [2021-07-09 18:39:01,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:01,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308243312] [2021-07-09 18:39:01,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:01,807 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:01,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:01,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308243312] [2021-07-09 18:39:01,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308243312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:01,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382512717] [2021-07-09 18:39:01,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:39:01,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:39:01,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:01,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:01,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:01,899 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:01,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382512717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:01,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:01,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:39:01,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194237285] [2021-07-09 18:39:01,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:39:01,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:01,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:39:01,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:39:01,900 INFO L87 Difference]: Start difference. First operand 29449 states and 86072 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 18:39:02,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:02,431 INFO L93 Difference]: Finished difference Result 36836 states and 106178 transitions. [2021-07-09 18:39:02,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:39:02,431 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 37 [2021-07-09 18:39:02,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:02,505 INFO L225 Difference]: With dead ends: 36836 [2021-07-09 18:39:02,505 INFO L226 Difference]: Without dead ends: 36822 [2021-07-09 18:39:02,505 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 197.7ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:39:02,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36822 states. [2021-07-09 18:39:03,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36822 to 29007. [2021-07-09 18:39:03,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29007 states, 29006 states have (on average 2.9205336826863406) internal successors, (84713), 29006 states have internal predecessors, (84713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:03,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29007 states to 29007 states and 84713 transitions. [2021-07-09 18:39:03,260 INFO L78 Accepts]: Start accepts. Automaton has 29007 states and 84713 transitions. Word has length 37 [2021-07-09 18:39:03,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:03,261 INFO L482 AbstractCegarLoop]: Abstraction has 29007 states and 84713 transitions. [2021-07-09 18:39:03,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 18:39:03,261 INFO L276 IsEmpty]: Start isEmpty. Operand 29007 states and 84713 transitions. [2021-07-09 18:39:03,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:39:03,302 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:03,302 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:03,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:03,502 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:03,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:03,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1156168766, now seen corresponding path program 96 times [2021-07-09 18:39:03,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:03,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563027785] [2021-07-09 18:39:03,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:03,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:03,533 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:03,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:03,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563027785] [2021-07-09 18:39:03,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563027785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:03,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996957129] [2021-07-09 18:39:03,533 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 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 18:39:03,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:39:03,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:03,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:03,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:03,642 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:03,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996957129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:03,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:03,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:39:03,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141152175] [2021-07-09 18:39:03,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:39:03,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:03,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:39:03,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:39:03,643 INFO L87 Difference]: Start difference. First operand 29007 states and 84713 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 18:39:04,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:04,147 INFO L93 Difference]: Finished difference Result 41031 states and 118463 transitions. [2021-07-09 18:39:04,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:39:04,148 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 37 [2021-07-09 18:39:04,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:04,231 INFO L225 Difference]: With dead ends: 41031 [2021-07-09 18:39:04,231 INFO L226 Difference]: Without dead ends: 40975 [2021-07-09 18:39:04,232 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 192.2ms TimeCoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:39:04,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40975 states. [2021-07-09 18:39:04,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40975 to 29017. [2021-07-09 18:39:04,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29017 states, 29016 states have (on average 2.9198373311276535) internal successors, (84722), 29016 states have internal predecessors, (84722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:04,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29017 states to 29017 states and 84722 transitions. [2021-07-09 18:39:04,922 INFO L78 Accepts]: Start accepts. Automaton has 29017 states and 84722 transitions. Word has length 37 [2021-07-09 18:39:04,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:04,922 INFO L482 AbstractCegarLoop]: Abstraction has 29017 states and 84722 transitions. [2021-07-09 18:39:04,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 18:39:04,923 INFO L276 IsEmpty]: Start isEmpty. Operand 29017 states and 84722 transitions. [2021-07-09 18:39:04,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:39:04,963 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:04,963 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:05,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:05,177 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:05,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:05,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1498761020, now seen corresponding path program 97 times [2021-07-09 18:39:05,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:05,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196986768] [2021-07-09 18:39:05,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:05,206 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:05,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:05,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196986768] [2021-07-09 18:39:05,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196986768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:05,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062815530] [2021-07-09 18:39:05,206 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 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 18:39:05,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:05,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:05,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:05,414 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:05,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062815530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:05,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:05,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:39:05,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414159824] [2021-07-09 18:39:05,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:39:05,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:05,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:39:05,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:39:05,415 INFO L87 Difference]: Start difference. First operand 29017 states and 84722 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 18:39:05,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:05,733 INFO L93 Difference]: Finished difference Result 35489 states and 102692 transitions. [2021-07-09 18:39:05,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:39:05,733 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 37 [2021-07-09 18:39:05,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:05,811 INFO L225 Difference]: With dead ends: 35489 [2021-07-09 18:39:05,811 INFO L226 Difference]: Without dead ends: 35440 [2021-07-09 18:39:05,811 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 160.0ms TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:39:05,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35440 states. [2021-07-09 18:39:06,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35440 to 29017. [2021-07-09 18:39:06,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29017 states, 29016 states have (on average 2.9190102012682657) internal successors, (84698), 29016 states have internal predecessors, (84698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:06,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29017 states to 29017 states and 84698 transitions. [2021-07-09 18:39:06,531 INFO L78 Accepts]: Start accepts. Automaton has 29017 states and 84698 transitions. Word has length 37 [2021-07-09 18:39:06,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:06,531 INFO L482 AbstractCegarLoop]: Abstraction has 29017 states and 84698 transitions. [2021-07-09 18:39:06,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 18:39:06,532 INFO L276 IsEmpty]: Start isEmpty. Operand 29017 states and 84698 transitions. [2021-07-09 18:39:06,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:39:06,574 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:06,574 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:06,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:06,775 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:06,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:06,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1139106120, now seen corresponding path program 98 times [2021-07-09 18:39:06,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:06,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807234648] [2021-07-09 18:39:06,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:06,806 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:06,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:06,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807234648] [2021-07-09 18:39:06,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807234648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:06,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852543913] [2021-07-09 18:39:06,806 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 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 18:39:06,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:39:06,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:06,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:06,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:06,906 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:06,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852543913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:06,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:06,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:39:06,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135407156] [2021-07-09 18:39:06,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:39:06,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:06,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:39:06,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:39:06,907 INFO L87 Difference]: Start difference. First operand 29017 states and 84698 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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 18:39:07,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:07,175 INFO L93 Difference]: Finished difference Result 32744 states and 95315 transitions. [2021-07-09 18:39:07,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:39:07,175 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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 37 [2021-07-09 18:39:07,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:07,248 INFO L225 Difference]: With dead ends: 32744 [2021-07-09 18:39:07,249 INFO L226 Difference]: Without dead ends: 32737 [2021-07-09 18:39:07,249 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:39:07,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32737 states. [2021-07-09 18:39:07,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32737 to 28808. [2021-07-09 18:39:07,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28808 states, 28807 states have (on average 2.919602874301385) internal successors, (84105), 28807 states have internal predecessors, (84105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:07,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28808 states to 28808 states and 84105 transitions. [2021-07-09 18:39:07,934 INFO L78 Accepts]: Start accepts. Automaton has 28808 states and 84105 transitions. Word has length 37 [2021-07-09 18:39:07,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:07,934 INFO L482 AbstractCegarLoop]: Abstraction has 28808 states and 84105 transitions. [2021-07-09 18:39:07,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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 18:39:07,935 INFO L276 IsEmpty]: Start isEmpty. Operand 28808 states and 84105 transitions. [2021-07-09 18:39:07,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:39:07,975 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:07,975 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:08,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:08,177 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:08,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:08,177 INFO L82 PathProgramCache]: Analyzing trace with hash -658181484, now seen corresponding path program 99 times [2021-07-09 18:39:08,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:08,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15886534] [2021-07-09 18:39:08,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:08,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:08,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:08,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15886534] [2021-07-09 18:39:08,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15886534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:08,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525787393] [2021-07-09 18:39:08,214 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 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 18:39:08,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:39:08,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:08,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:08,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:08,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525787393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:08,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:08,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:39:08,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930449687] [2021-07-09 18:39:08,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:39:08,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:08,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:39:08,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:39:08,317 INFO L87 Difference]: Start difference. First operand 28808 states and 84105 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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 18:39:08,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:08,539 INFO L93 Difference]: Finished difference Result 34783 states and 100971 transitions. [2021-07-09 18:39:08,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:39:08,539 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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 37 [2021-07-09 18:39:08,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:08,751 INFO L225 Difference]: With dead ends: 34783 [2021-07-09 18:39:08,751 INFO L226 Difference]: Without dead ends: 34717 [2021-07-09 18:39:08,752 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 97.0ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:39:08,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34717 states. [2021-07-09 18:39:09,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34717 to 28808. [2021-07-09 18:39:09,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28808 states, 28807 states have (on average 2.9192210226681015) internal successors, (84094), 28807 states have internal predecessors, (84094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:09,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28808 states to 28808 states and 84094 transitions. [2021-07-09 18:39:09,345 INFO L78 Accepts]: Start accepts. Automaton has 28808 states and 84094 transitions. Word has length 37 [2021-07-09 18:39:09,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:09,345 INFO L482 AbstractCegarLoop]: Abstraction has 28808 states and 84094 transitions. [2021-07-09 18:39:09,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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 18:39:09,346 INFO L276 IsEmpty]: Start isEmpty. Operand 28808 states and 84094 transitions. [2021-07-09 18:39:09,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:39:09,387 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:09,388 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:09,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:09,588 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:09,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:09,588 INFO L82 PathProgramCache]: Analyzing trace with hash -137360910, now seen corresponding path program 100 times [2021-07-09 18:39:09,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:09,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568089652] [2021-07-09 18:39:09,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:09,621 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:09,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:09,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568089652] [2021-07-09 18:39:09,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568089652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:09,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950524105] [2021-07-09 18:39:09,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:39:09,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:39:09,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:09,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:09,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:09,715 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:09,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950524105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:09,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:09,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:39:09,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462685688] [2021-07-09 18:39:09,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:39:09,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:09,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:39:09,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:39:09,716 INFO L87 Difference]: Start difference. First operand 28808 states and 84094 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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 18:39:09,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:09,976 INFO L93 Difference]: Finished difference Result 32159 states and 93482 transitions. [2021-07-09 18:39:09,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:39:09,976 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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 37 [2021-07-09 18:39:09,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:10,178 INFO L225 Difference]: With dead ends: 32159 [2021-07-09 18:39:10,178 INFO L226 Difference]: Without dead ends: 32159 [2021-07-09 18:39:10,179 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:39:10,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32159 states. [2021-07-09 18:39:10,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32159 to 29022. [2021-07-09 18:39:10,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29022 states, 29021 states have (on average 2.918817408083801) internal successors, (84707), 29021 states have internal predecessors, (84707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:10,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29022 states to 29022 states and 84707 transitions. [2021-07-09 18:39:10,778 INFO L78 Accepts]: Start accepts. Automaton has 29022 states and 84707 transitions. Word has length 37 [2021-07-09 18:39:10,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:10,778 INFO L482 AbstractCegarLoop]: Abstraction has 29022 states and 84707 transitions. [2021-07-09 18:39:10,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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 18:39:10,778 INFO L276 IsEmpty]: Start isEmpty. Operand 29022 states and 84707 transitions. [2021-07-09 18:39:10,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:39:10,817 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:10,817 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:11,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-07-09 18:39:11,019 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:11,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:11,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1394759394, now seen corresponding path program 101 times [2021-07-09 18:39:11,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:11,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691280036] [2021-07-09 18:39:11,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:11,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:11,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691280036] [2021-07-09 18:39:11,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691280036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:11,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806703675] [2021-07-09 18:39:11,049 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 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 18:39:11,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:39:11,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:11,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:11,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:11,148 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:11,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806703675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:11,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:11,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:39:11,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058243895] [2021-07-09 18:39:11,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:39:11,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:11,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:39:11,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:39:11,149 INFO L87 Difference]: Start difference. First operand 29022 states and 84707 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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 18:39:11,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:11,379 INFO L93 Difference]: Finished difference Result 34766 states and 100469 transitions. [2021-07-09 18:39:11,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:39:11,379 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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 37 [2021-07-09 18:39:11,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:11,447 INFO L225 Difference]: With dead ends: 34766 [2021-07-09 18:39:11,447 INFO L226 Difference]: Without dead ends: 34712 [2021-07-09 18:39:11,447 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:39:11,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34712 states. [2021-07-09 18:39:12,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34712 to 29022. [2021-07-09 18:39:12,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29022 states, 29021 states have (on average 2.918541745632473) internal successors, (84699), 29021 states have internal predecessors, (84699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:12,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29022 states to 29022 states and 84699 transitions. [2021-07-09 18:39:12,162 INFO L78 Accepts]: Start accepts. Automaton has 29022 states and 84699 transitions. Word has length 37 [2021-07-09 18:39:12,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:12,162 INFO L482 AbstractCegarLoop]: Abstraction has 29022 states and 84699 transitions. [2021-07-09 18:39:12,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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 18:39:12,162 INFO L276 IsEmpty]: Start isEmpty. Operand 29022 states and 84699 transitions. [2021-07-09 18:39:12,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:39:12,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:12,211 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:12,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-07-09 18:39:12,412 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:12,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:12,412 INFO L82 PathProgramCache]: Analyzing trace with hash -176149936, now seen corresponding path program 102 times [2021-07-09 18:39:12,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:12,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434563145] [2021-07-09 18:39:12,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:12,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:12,450 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:12,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:12,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434563145] [2021-07-09 18:39:12,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434563145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:12,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455222422] [2021-07-09 18:39:12,451 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 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 18:39:12,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:39:12,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:12,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:12,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:12,554 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:12,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455222422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:12,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:12,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:39:12,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356829006] [2021-07-09 18:39:12,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:39:12,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:12,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:39:12,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:39:12,555 INFO L87 Difference]: Start difference. First operand 29022 states and 84699 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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 18:39:12,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:12,898 INFO L93 Difference]: Finished difference Result 31470 states and 91225 transitions. [2021-07-09 18:39:12,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:39:12,898 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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 37 [2021-07-09 18:39:12,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:13,104 INFO L225 Difference]: With dead ends: 31470 [2021-07-09 18:39:13,104 INFO L226 Difference]: Without dead ends: 31470 [2021-07-09 18:39:13,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 139.0ms TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:39:13,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31470 states. [2021-07-09 18:39:13,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31470 to 29312. [2021-07-09 18:39:13,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29312 states, 29311 states have (on average 2.917744191600423) internal successors, (85522), 29311 states have internal predecessors, (85522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:13,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29312 states to 29312 states and 85522 transitions. [2021-07-09 18:39:13,741 INFO L78 Accepts]: Start accepts. Automaton has 29312 states and 85522 transitions. Word has length 37 [2021-07-09 18:39:13,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:13,741 INFO L482 AbstractCegarLoop]: Abstraction has 29312 states and 85522 transitions. [2021-07-09 18:39:13,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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 18:39:13,742 INFO L276 IsEmpty]: Start isEmpty. Operand 29312 states and 85522 transitions. [2021-07-09 18:39:13,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:39:13,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:13,791 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:14,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-07-09 18:39:14,000 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:14,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:14,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1979611270, now seen corresponding path program 103 times [2021-07-09 18:39:14,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:14,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572780574] [2021-07-09 18:39:14,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:14,042 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:14,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:14,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572780574] [2021-07-09 18:39:14,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572780574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:14,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847394021] [2021-07-09 18:39:14,042 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 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 18:39:14,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:14,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:14,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:14,136 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:14,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847394021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:14,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:14,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:39:14,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267774806] [2021-07-09 18:39:14,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:39:14,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:14,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:39:14,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:39:14,137 INFO L87 Difference]: Start difference. First operand 29312 states and 85522 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 18:39:14,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:14,477 INFO L93 Difference]: Finished difference Result 35663 states and 102618 transitions. [2021-07-09 18:39:14,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:39:14,478 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 37 [2021-07-09 18:39:14,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:14,699 INFO L225 Difference]: With dead ends: 35663 [2021-07-09 18:39:14,699 INFO L226 Difference]: Without dead ends: 35621 [2021-07-09 18:39:14,700 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 177.5ms TimeCoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:39:14,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35621 states. [2021-07-09 18:39:15,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35621 to 30052. [2021-07-09 18:39:15,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30052 states, 30051 states have (on average 2.922365312302419) internal successors, (87820), 30051 states have internal predecessors, (87820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:15,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30052 states to 30052 states and 87820 transitions. [2021-07-09 18:39:15,402 INFO L78 Accepts]: Start accepts. Automaton has 30052 states and 87820 transitions. Word has length 37 [2021-07-09 18:39:15,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:15,402 INFO L482 AbstractCegarLoop]: Abstraction has 30052 states and 87820 transitions. [2021-07-09 18:39:15,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 18:39:15,402 INFO L276 IsEmpty]: Start isEmpty. Operand 30052 states and 87820 transitions. [2021-07-09 18:39:15,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:39:15,451 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:15,451 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:15,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:15,652 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:15,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:15,652 INFO L82 PathProgramCache]: Analyzing trace with hash 2112887858, now seen corresponding path program 104 times [2021-07-09 18:39:15,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:15,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628442599] [2021-07-09 18:39:15,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:15,680 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:15,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:15,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628442599] [2021-07-09 18:39:15,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628442599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:15,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539433006] [2021-07-09 18:39:15,680 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:39:15,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:39:15,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:15,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:15,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:15,777 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:15,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539433006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:15,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:15,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:39:15,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551352014] [2021-07-09 18:39:15,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:39:15,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:15,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:39:15,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:39:15,778 INFO L87 Difference]: Start difference. First operand 30052 states and 87820 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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 18:39:16,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:16,353 INFO L93 Difference]: Finished difference Result 34791 states and 100558 transitions. [2021-07-09 18:39:16,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:39:16,353 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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 37 [2021-07-09 18:39:16,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:16,431 INFO L225 Difference]: With dead ends: 34791 [2021-07-09 18:39:16,432 INFO L226 Difference]: Without dead ends: 34791 [2021-07-09 18:39:16,432 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 240.9ms TimeCoverageRelationStatistics Valid=425, Invalid=907, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:39:16,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34791 states. [2021-07-09 18:39:16,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34791 to 31196. [2021-07-09 18:39:17,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31196 states, 31195 states have (on average 2.9202756852059624) internal successors, (91098), 31195 states have internal predecessors, (91098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:17,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31196 states to 31196 states and 91098 transitions. [2021-07-09 18:39:17,102 INFO L78 Accepts]: Start accepts. Automaton has 31196 states and 91098 transitions. Word has length 37 [2021-07-09 18:39:17,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:17,102 INFO L482 AbstractCegarLoop]: Abstraction has 31196 states and 91098 transitions. [2021-07-09 18:39:17,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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 18:39:17,102 INFO L276 IsEmpty]: Start isEmpty. Operand 31196 states and 91098 transitions. [2021-07-09 18:39:17,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:39:17,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:17,150 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:17,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-07-09 18:39:17,350 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:17,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:17,351 INFO L82 PathProgramCache]: Analyzing trace with hash 184409928, now seen corresponding path program 105 times [2021-07-09 18:39:17,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:17,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997783043] [2021-07-09 18:39:17,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:17,378 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:17,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:17,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997783043] [2021-07-09 18:39:17,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997783043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:17,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679062474] [2021-07-09 18:39:17,378 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 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 18:39:17,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:39:17,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:17,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:17,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:17,472 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:17,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679062474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:17,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:17,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:39:17,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780008396] [2021-07-09 18:39:17,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:39:17,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:17,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:39:17,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:39:17,473 INFO L87 Difference]: Start difference. First operand 31196 states and 91098 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 18:39:17,702 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-07-09 18:39:17,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:18,000 INFO L93 Difference]: Finished difference Result 39476 states and 113843 transitions. [2021-07-09 18:39:18,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:39:18,000 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 37 [2021-07-09 18:39:18,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:18,092 INFO L225 Difference]: With dead ends: 39476 [2021-07-09 18:39:18,092 INFO L226 Difference]: Without dead ends: 39428 [2021-07-09 18:39:18,092 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 320.7ms TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:39:18,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39428 states. [2021-07-09 18:39:18,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39428 to 33980. [2021-07-09 18:39:18,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33980 states, 33979 states have (on average 2.9163895347126165) internal successors, (99096), 33979 states have internal predecessors, (99096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:19,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33980 states to 33980 states and 99096 transitions. [2021-07-09 18:39:19,026 INFO L78 Accepts]: Start accepts. Automaton has 33980 states and 99096 transitions. Word has length 37 [2021-07-09 18:39:19,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:19,026 INFO L482 AbstractCegarLoop]: Abstraction has 33980 states and 99096 transitions. [2021-07-09 18:39:19,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 18:39:19,026 INFO L276 IsEmpty]: Start isEmpty. Operand 33980 states and 99096 transitions. [2021-07-09 18:39:19,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:39:19,078 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:19,078 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:19,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:19,279 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:19,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:19,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1148303984, now seen corresponding path program 106 times [2021-07-09 18:39:19,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:19,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94063483] [2021-07-09 18:39:19,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:19,308 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:19,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:19,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94063483] [2021-07-09 18:39:19,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94063483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:19,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270412406] [2021-07-09 18:39:19,308 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 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 18:39:19,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:39:19,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:19,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:19,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:19,422 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:19,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270412406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:19,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:19,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:39:19,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205274219] [2021-07-09 18:39:19,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:39:19,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:19,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:39:19,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:39:19,423 INFO L87 Difference]: Start difference. First operand 33980 states and 99096 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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 18:39:19,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:19,958 INFO L93 Difference]: Finished difference Result 38964 states and 112439 transitions. [2021-07-09 18:39:19,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:39:19,958 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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 37 [2021-07-09 18:39:19,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:20,171 INFO L225 Difference]: With dead ends: 38964 [2021-07-09 18:39:20,171 INFO L226 Difference]: Without dead ends: 38964 [2021-07-09 18:39:20,171 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 271.3ms TimeCoverageRelationStatistics Valid=568, Invalid=1072, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:39:20,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38964 states. [2021-07-09 18:39:20,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38964 to 35404. [2021-07-09 18:39:20,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35404 states, 35403 states have (on average 2.923989492415897) internal successors, (103518), 35403 states have internal predecessors, (103518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:20,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35404 states to 35404 states and 103518 transitions. [2021-07-09 18:39:20,903 INFO L78 Accepts]: Start accepts. Automaton has 35404 states and 103518 transitions. Word has length 37 [2021-07-09 18:39:20,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:20,903 INFO L482 AbstractCegarLoop]: Abstraction has 35404 states and 103518 transitions. [2021-07-09 18:39:20,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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 18:39:20,903 INFO L276 IsEmpty]: Start isEmpty. Operand 35404 states and 103518 transitions. [2021-07-09 18:39:20,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:39:20,957 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:20,957 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:21,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-07-09 18:39:21,157 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:21,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:21,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1359001030, now seen corresponding path program 107 times [2021-07-09 18:39:21,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:21,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929279834] [2021-07-09 18:39:21,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:21,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:21,193 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:21,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:21,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929279834] [2021-07-09 18:39:21,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929279834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:21,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284176228] [2021-07-09 18:39:21,194 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:39:21,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:39:21,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:21,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:21,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:21,301 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:21,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284176228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:21,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:21,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:39:21,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920897809] [2021-07-09 18:39:21,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:39:21,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:21,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:39:21,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:39:21,302 INFO L87 Difference]: Start difference. First operand 35404 states and 103518 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 18:39:21,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:21,905 INFO L93 Difference]: Finished difference Result 42608 states and 123206 transitions. [2021-07-09 18:39:21,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:39:21,905 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 37 [2021-07-09 18:39:21,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:22,006 INFO L225 Difference]: With dead ends: 42608 [2021-07-09 18:39:22,006 INFO L226 Difference]: Without dead ends: 42590 [2021-07-09 18:39:22,006 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 210.2ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:39:22,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42590 states. [2021-07-09 18:39:22,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42590 to 35964. [2021-07-09 18:39:22,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35964 states, 35963 states have (on average 2.924227678447293) internal successors, (105164), 35963 states have internal predecessors, (105164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:22,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35964 states to 35964 states and 105164 transitions. [2021-07-09 18:39:22,993 INFO L78 Accepts]: Start accepts. Automaton has 35964 states and 105164 transitions. Word has length 37 [2021-07-09 18:39:22,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:22,993 INFO L482 AbstractCegarLoop]: Abstraction has 35964 states and 105164 transitions. [2021-07-09 18:39:22,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 18:39:22,993 INFO L276 IsEmpty]: Start isEmpty. Operand 35964 states and 105164 transitions. [2021-07-09 18:39:23,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:39:23,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:23,048 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:23,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:23,249 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:23,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:23,249 INFO L82 PathProgramCache]: Analyzing trace with hash -630249212, now seen corresponding path program 108 times [2021-07-09 18:39:23,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:23,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868462257] [2021-07-09 18:39:23,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:23,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:23,276 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:23,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:23,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868462257] [2021-07-09 18:39:23,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868462257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:23,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216811246] [2021-07-09 18:39:23,277 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 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 18:39:23,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:39:23,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:23,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:23,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:23,380 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:23,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216811246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:23,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:23,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:39:23,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278952591] [2021-07-09 18:39:23,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:39:23,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:23,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:39:23,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:39:23,381 INFO L87 Difference]: Start difference. First operand 35964 states and 105164 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 18:39:23,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:23,944 INFO L93 Difference]: Finished difference Result 41823 states and 120036 transitions. [2021-07-09 18:39:23,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:39:23,944 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 37 [2021-07-09 18:39:23,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:24,167 INFO L225 Difference]: With dead ends: 41823 [2021-07-09 18:39:24,168 INFO L226 Difference]: Without dead ends: 41816 [2021-07-09 18:39:24,168 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 298.9ms TimeCoverageRelationStatistics Valid=578, Invalid=1314, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:39:24,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41816 states. [2021-07-09 18:39:24,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41816 to 34914. [2021-07-09 18:39:24,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34914 states, 34913 states have (on average 2.913441984361126) internal successors, (101717), 34913 states have internal predecessors, (101717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:24,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34914 states to 34914 states and 101717 transitions. [2021-07-09 18:39:24,914 INFO L78 Accepts]: Start accepts. Automaton has 34914 states and 101717 transitions. Word has length 37 [2021-07-09 18:39:24,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:24,914 INFO L482 AbstractCegarLoop]: Abstraction has 34914 states and 101717 transitions. [2021-07-09 18:39:24,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 18:39:24,914 INFO L276 IsEmpty]: Start isEmpty. Operand 34914 states and 101717 transitions. [2021-07-09 18:39:24,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:39:24,967 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:24,967 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:25,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:25,168 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:25,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:25,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1007220366, now seen corresponding path program 109 times [2021-07-09 18:39:25,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:25,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728774750] [2021-07-09 18:39:25,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:25,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:25,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:25,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728774750] [2021-07-09 18:39:25,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728774750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:25,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698894737] [2021-07-09 18:39:25,197 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 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 18:39:25,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:25,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:25,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:25,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698894737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:25,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:25,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:39:25,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605734443] [2021-07-09 18:39:25,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:39:25,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:25,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:39:25,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:39:25,288 INFO L87 Difference]: Start difference. First operand 34914 states and 101717 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 18:39:25,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:25,790 INFO L93 Difference]: Finished difference Result 37167 states and 107431 transitions. [2021-07-09 18:39:25,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:39:25,790 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 37 [2021-07-09 18:39:25,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:25,862 INFO L225 Difference]: With dead ends: 37167 [2021-07-09 18:39:25,862 INFO L226 Difference]: Without dead ends: 37153 [2021-07-09 18:39:25,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 185.3ms TimeCoverageRelationStatistics Valid=367, Invalid=689, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:39:25,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37153 states. [2021-07-09 18:39:26,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37153 to 32388. [2021-07-09 18:39:26,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32388 states, 32387 states have (on average 2.9138234476796248) internal successors, (94370), 32387 states have internal predecessors, (94370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:26,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32388 states to 32388 states and 94370 transitions. [2021-07-09 18:39:26,547 INFO L78 Accepts]: Start accepts. Automaton has 32388 states and 94370 transitions. Word has length 37 [2021-07-09 18:39:26,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:26,547 INFO L482 AbstractCegarLoop]: Abstraction has 32388 states and 94370 transitions. [2021-07-09 18:39:26,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 18:39:26,547 INFO L276 IsEmpty]: Start isEmpty. Operand 32388 states and 94370 transitions. [2021-07-09 18:39:26,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:39:26,596 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:26,597 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:26,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:26,812 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:26,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:26,813 INFO L82 PathProgramCache]: Analyzing trace with hash 186679958, now seen corresponding path program 110 times [2021-07-09 18:39:26,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:26,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761155820] [2021-07-09 18:39:26,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:26,843 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:26,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:26,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761155820] [2021-07-09 18:39:26,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761155820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:26,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876089585] [2021-07-09 18:39:26,845 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 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 18:39:26,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:39:26,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:26,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:26,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:26,955 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:26,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876089585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:26,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:26,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:39:26,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557778929] [2021-07-09 18:39:26,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:39:26,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:26,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:39:26,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:39:26,956 INFO L87 Difference]: Start difference. First operand 32388 states and 94370 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:27,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:27,509 INFO L93 Difference]: Finished difference Result 36029 states and 103999 transitions. [2021-07-09 18:39:27,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:39:27,509 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:39:27,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:27,586 INFO L225 Difference]: With dead ends: 36029 [2021-07-09 18:39:27,586 INFO L226 Difference]: Without dead ends: 36017 [2021-07-09 18:39:27,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 222.6ms TimeCoverageRelationStatistics Valid=340, Invalid=782, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:39:27,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36017 states. [2021-07-09 18:39:28,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36017 to 32678. [2021-07-09 18:39:28,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32678 states, 32677 states have (on average 2.913884383511338) internal successors, (95217), 32677 states have internal predecessors, (95217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:28,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32678 states to 32678 states and 95217 transitions. [2021-07-09 18:39:28,301 INFO L78 Accepts]: Start accepts. Automaton has 32678 states and 95217 transitions. Word has length 37 [2021-07-09 18:39:28,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:28,302 INFO L482 AbstractCegarLoop]: Abstraction has 32678 states and 95217 transitions. [2021-07-09 18:39:28,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:28,302 INFO L276 IsEmpty]: Start isEmpty. Operand 32678 states and 95217 transitions. [2021-07-09 18:39:28,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:39:28,349 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:28,349 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:28,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:28,550 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:28,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:28,550 INFO L82 PathProgramCache]: Analyzing trace with hash -910944820, now seen corresponding path program 111 times [2021-07-09 18:39:28,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:28,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184313932] [2021-07-09 18:39:28,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:28,574 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:28,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:28,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184313932] [2021-07-09 18:39:28,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184313932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:28,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835933230] [2021-07-09 18:39:28,574 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 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 18:39:28,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:39:28,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:28,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:28,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:28,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835933230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:28,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:28,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 18:39:28,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441208391] [2021-07-09 18:39:28,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:39:28,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:28,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:39:28,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:39:28,675 INFO L87 Difference]: Start difference. First operand 32678 states and 95217 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 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 18:39:29,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:29,245 INFO L93 Difference]: Finished difference Result 37754 states and 108873 transitions. [2021-07-09 18:39:29,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:39:29,245 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 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 37 [2021-07-09 18:39:29,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:29,333 INFO L225 Difference]: With dead ends: 37754 [2021-07-09 18:39:29,333 INFO L226 Difference]: Without dead ends: 37748 [2021-07-09 18:39:29,333 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 350.7ms TimeCoverageRelationStatistics Valid=390, Invalid=800, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:39:29,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37748 states. [2021-07-09 18:39:29,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37748 to 32756. [2021-07-09 18:39:29,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32756 states, 32755 states have (on average 2.913753625400702) internal successors, (95440), 32755 states have internal predecessors, (95440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:30,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32756 states to 32756 states and 95440 transitions. [2021-07-09 18:39:30,052 INFO L78 Accepts]: Start accepts. Automaton has 32756 states and 95440 transitions. Word has length 37 [2021-07-09 18:39:30,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:30,052 INFO L482 AbstractCegarLoop]: Abstraction has 32756 states and 95440 transitions. [2021-07-09 18:39:30,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 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 18:39:30,052 INFO L276 IsEmpty]: Start isEmpty. Operand 32756 states and 95440 transitions. [2021-07-09 18:39:30,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:39:30,102 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:30,103 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:30,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:30,303 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:30,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:30,303 INFO L82 PathProgramCache]: Analyzing trace with hash -11649450, now seen corresponding path program 112 times [2021-07-09 18:39:30,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:30,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070600221] [2021-07-09 18:39:30,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:30,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:30,329 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:30,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:30,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070600221] [2021-07-09 18:39:30,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070600221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:30,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654808] [2021-07-09 18:39:30,329 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 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 18:39:30,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:39:30,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:30,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:30,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:30,425 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:30,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:30,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:30,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 18:39:30,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733724450] [2021-07-09 18:39:30,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:39:30,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:30,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:39:30,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:39:30,426 INFO L87 Difference]: Start difference. First operand 32756 states and 95440 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 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 18:39:31,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:31,082 INFO L93 Difference]: Finished difference Result 39250 states and 113105 transitions. [2021-07-09 18:39:31,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:39:31,082 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 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 37 [2021-07-09 18:39:31,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:31,171 INFO L225 Difference]: With dead ends: 39250 [2021-07-09 18:39:31,172 INFO L226 Difference]: Without dead ends: 39250 [2021-07-09 18:39:31,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 400.9ms TimeCoverageRelationStatistics Valid=603, Invalid=1119, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:39:31,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39250 states. [2021-07-09 18:39:31,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39250 to 34480. [2021-07-09 18:39:31,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34480 states, 34479 states have (on average 2.9163258795208677) internal successors, (100552), 34479 states have internal predecessors, (100552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:31,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34480 states to 34480 states and 100552 transitions. [2021-07-09 18:39:31,938 INFO L78 Accepts]: Start accepts. Automaton has 34480 states and 100552 transitions. Word has length 37 [2021-07-09 18:39:31,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:31,939 INFO L482 AbstractCegarLoop]: Abstraction has 34480 states and 100552 transitions. [2021-07-09 18:39:31,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 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 18:39:31,939 INFO L276 IsEmpty]: Start isEmpty. Operand 34480 states and 100552 transitions. [2021-07-09 18:39:31,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:39:31,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:31,985 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:32,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-07-09 18:39:32,186 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:32,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:32,186 INFO L82 PathProgramCache]: Analyzing trace with hash 129434168, now seen corresponding path program 113 times [2021-07-09 18:39:32,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:32,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065473000] [2021-07-09 18:39:32,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:32,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:32,210 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:39:32,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:32,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065473000] [2021-07-09 18:39:32,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065473000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:32,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418608596] [2021-07-09 18:39:32,210 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 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 18:39:32,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:39:32,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:32,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:32,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:32,307 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:32,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418608596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:32,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:32,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 18:39:32,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430262337] [2021-07-09 18:39:32,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:39:32,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:32,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:39:32,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:39:32,308 INFO L87 Difference]: Start difference. First operand 34480 states and 100552 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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 18:39:32,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:32,904 INFO L93 Difference]: Finished difference Result 38561 states and 111257 transitions. [2021-07-09 18:39:32,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:39:32,904 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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 37 [2021-07-09 18:39:32,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:32,986 INFO L225 Difference]: With dead ends: 38561 [2021-07-09 18:39:32,986 INFO L226 Difference]: Without dead ends: 38540 [2021-07-09 18:39:32,986 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 228.0ms TimeCoverageRelationStatistics Valid=430, Invalid=830, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:39:33,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38540 states. [2021-07-09 18:39:33,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38540 to 31858. [2021-07-09 18:39:33,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31858 states, 31857 states have (on average 2.9098471293593247) internal successors, (92699), 31857 states have internal predecessors, (92699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:33,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31858 states to 31858 states and 92699 transitions. [2021-07-09 18:39:33,713 INFO L78 Accepts]: Start accepts. Automaton has 31858 states and 92699 transitions. Word has length 37 [2021-07-09 18:39:33,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:33,713 INFO L482 AbstractCegarLoop]: Abstraction has 31858 states and 92699 transitions. [2021-07-09 18:39:33,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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 18:39:33,713 INFO L276 IsEmpty]: Start isEmpty. Operand 31858 states and 92699 transitions. [2021-07-09 18:39:33,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:39:33,758 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:33,758 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:33,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-07-09 18:39:33,959 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:33,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:33,959 INFO L82 PathProgramCache]: Analyzing trace with hash 213832942, now seen corresponding path program 114 times [2021-07-09 18:39:33,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:33,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905623922] [2021-07-09 18:39:33,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:33,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:33,986 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:33,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:33,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905623922] [2021-07-09 18:39:33,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905623922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:33,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152761412] [2021-07-09 18:39:33,987 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 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 18:39:34,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:39:34,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:34,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:34,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:34,085 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:34,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152761412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:34,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:34,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:39:34,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146501655] [2021-07-09 18:39:34,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:39:34,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:34,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:39:34,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:39:34,086 INFO L87 Difference]: Start difference. First operand 31858 states and 92699 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 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 18:39:34,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:34,506 INFO L93 Difference]: Finished difference Result 37036 states and 106722 transitions. [2021-07-09 18:39:34,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:39:34,508 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 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 37 [2021-07-09 18:39:34,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:34,744 INFO L225 Difference]: With dead ends: 37036 [2021-07-09 18:39:34,744 INFO L226 Difference]: Without dead ends: 36980 [2021-07-09 18:39:34,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 208.6ms TimeCoverageRelationStatistics Valid=373, Invalid=817, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:39:34,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36980 states. [2021-07-09 18:39:35,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36980 to 32346. [2021-07-09 18:39:35,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32346 states, 32345 states have (on average 2.913000463750193) internal successors, (94221), 32345 states have internal predecessors, (94221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:35,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32346 states to 32346 states and 94221 transitions. [2021-07-09 18:39:35,455 INFO L78 Accepts]: Start accepts. Automaton has 32346 states and 94221 transitions. Word has length 37 [2021-07-09 18:39:35,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:35,455 INFO L482 AbstractCegarLoop]: Abstraction has 32346 states and 94221 transitions. [2021-07-09 18:39:35,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 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 18:39:35,455 INFO L276 IsEmpty]: Start isEmpty. Operand 32346 states and 94221 transitions. [2021-07-09 18:39:35,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:39:35,505 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:35,505 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:35,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-07-09 18:39:35,706 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:35,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:35,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1613237908, now seen corresponding path program 115 times [2021-07-09 18:39:35,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:35,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206641001] [2021-07-09 18:39:35,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:35,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:35,747 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:35,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:35,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206641001] [2021-07-09 18:39:35,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206641001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:35,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604741763] [2021-07-09 18:39:35,747 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 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 18:39:35,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:35,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:35,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:35,872 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:35,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604741763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:35,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:35,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:39:35,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836240989] [2021-07-09 18:39:35,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:39:35,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:35,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:39:35,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:39:35,873 INFO L87 Difference]: Start difference. First operand 32346 states and 94221 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 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 18:39:36,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:36,459 INFO L93 Difference]: Finished difference Result 37351 states and 107673 transitions. [2021-07-09 18:39:36,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:39:36,459 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 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 37 [2021-07-09 18:39:36,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:36,536 INFO L225 Difference]: With dead ends: 37351 [2021-07-09 18:39:36,537 INFO L226 Difference]: Without dead ends: 37339 [2021-07-09 18:39:36,537 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 248.9ms TimeCoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:39:36,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37339 states. [2021-07-09 18:39:37,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37339 to 33412. [2021-07-09 18:39:37,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33412 states, 33411 states have (on average 2.9077848612732335) internal successors, (97152), 33411 states have internal predecessors, (97152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:37,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33412 states to 33412 states and 97152 transitions. [2021-07-09 18:39:37,199 INFO L78 Accepts]: Start accepts. Automaton has 33412 states and 97152 transitions. Word has length 37 [2021-07-09 18:39:37,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:37,199 INFO L482 AbstractCegarLoop]: Abstraction has 33412 states and 97152 transitions. [2021-07-09 18:39:37,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 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 18:39:37,199 INFO L276 IsEmpty]: Start isEmpty. Operand 33412 states and 97152 transitions. [2021-07-09 18:39:37,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:39:37,247 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:37,247 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:37,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-07-09 18:39:37,447 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:37,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:37,448 INFO L82 PathProgramCache]: Analyzing trace with hash -15482446, now seen corresponding path program 116 times [2021-07-09 18:39:37,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:37,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181532336] [2021-07-09 18:39:37,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:37,471 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:37,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:37,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181532336] [2021-07-09 18:39:37,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181532336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:37,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823709239] [2021-07-09 18:39:37,472 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 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 18:39:37,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:39:37,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:37,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:37,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:37,593 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:37,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823709239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:37,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:37,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 18:39:37,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384265408] [2021-07-09 18:39:37,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:39:37,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:37,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:39:37,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:39:37,594 INFO L87 Difference]: Start difference. First operand 33412 states and 97152 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 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 18:39:38,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:38,216 INFO L93 Difference]: Finished difference Result 42266 states and 121578 transitions. [2021-07-09 18:39:38,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:39:38,221 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 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 37 [2021-07-09 18:39:38,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:38,313 INFO L225 Difference]: With dead ends: 42266 [2021-07-09 18:39:38,313 INFO L226 Difference]: Without dead ends: 42260 [2021-07-09 18:39:38,313 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 269.9ms TimeCoverageRelationStatistics Valid=467, Invalid=1015, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:39:38,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42260 states. [2021-07-09 18:39:38,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42260 to 36196. [2021-07-09 18:39:39,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36196 states, 36195 states have (on average 2.9085232766956763) internal successors, (105274), 36195 states have internal predecessors, (105274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:39,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36196 states to 36196 states and 105274 transitions. [2021-07-09 18:39:39,101 INFO L78 Accepts]: Start accepts. Automaton has 36196 states and 105274 transitions. Word has length 37 [2021-07-09 18:39:39,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:39,101 INFO L482 AbstractCegarLoop]: Abstraction has 36196 states and 105274 transitions. [2021-07-09 18:39:39,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 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 18:39:39,101 INFO L276 IsEmpty]: Start isEmpty. Operand 36196 states and 105274 transitions. [2021-07-09 18:39:39,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:39:39,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:39,283 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:39,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:39,484 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:39,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:39,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1464079188, now seen corresponding path program 117 times [2021-07-09 18:39:39,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:39,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431124654] [2021-07-09 18:39:39,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:39,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:39,505 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:39,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:39,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431124654] [2021-07-09 18:39:39,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431124654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:39,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464810483] [2021-07-09 18:39:39,506 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 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 18:39:39,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:39:39,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:39,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:39,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:39,615 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:39,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464810483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:39,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:39,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-07-09 18:39:39,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074177096] [2021-07-09 18:39:39,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:39:39,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:39,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:39:39,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:39:39,616 INFO L87 Difference]: Start difference. First operand 36196 states and 105274 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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 18:39:40,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:40,200 INFO L93 Difference]: Finished difference Result 47527 states and 136941 transitions. [2021-07-09 18:39:40,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:39:40,201 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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 37 [2021-07-09 18:39:40,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:40,319 INFO L225 Difference]: With dead ends: 47527 [2021-07-09 18:39:40,319 INFO L226 Difference]: Without dead ends: 47527 [2021-07-09 18:39:40,320 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 285.6ms TimeCoverageRelationStatistics Valid=546, Invalid=1014, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:39:40,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47527 states. [2021-07-09 18:39:41,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47527 to 41782. [2021-07-09 18:39:41,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41782 states, 41781 states have (on average 2.9070869533998707) internal successors, (121461), 41781 states have internal predecessors, (121461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:41,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41782 states to 41782 states and 121461 transitions. [2021-07-09 18:39:41,295 INFO L78 Accepts]: Start accepts. Automaton has 41782 states and 121461 transitions. Word has length 37 [2021-07-09 18:39:41,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:41,295 INFO L482 AbstractCegarLoop]: Abstraction has 41782 states and 121461 transitions. [2021-07-09 18:39:41,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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 18:39:41,295 INFO L276 IsEmpty]: Start isEmpty. Operand 41782 states and 121461 transitions. [2021-07-09 18:39:41,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:39:41,356 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:41,356 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:41,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:41,557 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:41,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:41,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1605162806, now seen corresponding path program 118 times [2021-07-09 18:39:41,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:41,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961777923] [2021-07-09 18:39:41,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:41,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:39:41,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:41,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961777923] [2021-07-09 18:39:41,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961777923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:41,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814519421] [2021-07-09 18:39:41,578 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 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 18:39:41,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:39:41,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:41,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:41,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:41,680 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:41,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814519421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:41,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:41,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-07-09 18:39:41,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398226791] [2021-07-09 18:39:41,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:39:41,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:41,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:39:41,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:39:41,681 INFO L87 Difference]: Start difference. First operand 41782 states and 121461 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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 18:39:42,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:42,309 INFO L93 Difference]: Finished difference Result 46978 states and 135486 transitions. [2021-07-09 18:39:42,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:39:42,309 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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 37 [2021-07-09 18:39:42,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:42,417 INFO L225 Difference]: With dead ends: 46978 [2021-07-09 18:39:42,417 INFO L226 Difference]: Without dead ends: 46964 [2021-07-09 18:39:42,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 386.0ms TimeCoverageRelationStatistics Valid=466, Invalid=940, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:39:42,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46964 states. [2021-07-09 18:39:43,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46964 to 40988. [2021-07-09 18:39:43,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40988 states, 40987 states have (on average 2.9025300705101618) internal successors, (118966), 40987 states have internal predecessors, (118966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:43,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40988 states to 40988 states and 118966 transitions. [2021-07-09 18:39:43,419 INFO L78 Accepts]: Start accepts. Automaton has 40988 states and 118966 transitions. Word has length 37 [2021-07-09 18:39:43,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:43,419 INFO L482 AbstractCegarLoop]: Abstraction has 40988 states and 118966 transitions. [2021-07-09 18:39:43,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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 18:39:43,419 INFO L276 IsEmpty]: Start isEmpty. Operand 40988 states and 118966 transitions. [2021-07-09 18:39:43,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:39:43,477 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:43,477 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:43,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:43,678 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:43,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:43,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1689561580, now seen corresponding path program 119 times [2021-07-09 18:39:43,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:43,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741405209] [2021-07-09 18:39:43,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:43,703 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:39:43,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:43,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741405209] [2021-07-09 18:39:43,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741405209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:43,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406468602] [2021-07-09 18:39:43,704 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 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 18:39:43,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:39:43,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:43,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:43,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:43,811 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:43,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406468602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:43,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:43,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 18:39:43,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220907929] [2021-07-09 18:39:43,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:39:43,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:43,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:39:43,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:39:43,812 INFO L87 Difference]: Start difference. First operand 40988 states and 118966 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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 18:39:44,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:44,440 INFO L93 Difference]: Finished difference Result 47765 states and 137692 transitions. [2021-07-09 18:39:44,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:39:44,440 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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 37 [2021-07-09 18:39:44,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:44,544 INFO L225 Difference]: With dead ends: 47765 [2021-07-09 18:39:44,544 INFO L226 Difference]: Without dead ends: 47709 [2021-07-09 18:39:44,544 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 232.0ms TimeCoverageRelationStatistics Valid=411, Invalid=921, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:39:44,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47709 states. [2021-07-09 18:39:45,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47709 to 41900. [2021-07-09 18:39:45,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41900 states, 41899 states have (on average 2.9004988185875558) internal successors, (121528), 41899 states have internal predecessors, (121528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:45,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41900 states to 41900 states and 121528 transitions. [2021-07-09 18:39:45,394 INFO L78 Accepts]: Start accepts. Automaton has 41900 states and 121528 transitions. Word has length 37 [2021-07-09 18:39:45,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:45,394 INFO L482 AbstractCegarLoop]: Abstraction has 41900 states and 121528 transitions. [2021-07-09 18:39:45,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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 18:39:45,394 INFO L276 IsEmpty]: Start isEmpty. Operand 41900 states and 121528 transitions. [2021-07-09 18:39:45,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:39:45,601 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:45,601 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:45,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:45,816 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:45,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:45,817 INFO L82 PathProgramCache]: Analyzing trace with hash -965368206, now seen corresponding path program 120 times [2021-07-09 18:39:45,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:45,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206913487] [2021-07-09 18:39:45,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:45,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:45,853 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:45,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:45,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206913487] [2021-07-09 18:39:45,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206913487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:45,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582388755] [2021-07-09 18:39:45,853 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 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 18:39:45,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:39:45,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:45,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:45,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:45,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582388755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:45,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:45,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:39:45,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076194602] [2021-07-09 18:39:45,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:39:45,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:45,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:39:45,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:39:45,968 INFO L87 Difference]: Start difference. First operand 41900 states and 121528 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 18:39:46,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:46,417 INFO L93 Difference]: Finished difference Result 48735 states and 140489 transitions. [2021-07-09 18:39:46,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:39:46,417 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 37 [2021-07-09 18:39:46,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:46,534 INFO L225 Difference]: With dead ends: 48735 [2021-07-09 18:39:46,534 INFO L226 Difference]: Without dead ends: 48637 [2021-07-09 18:39:46,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 222.1ms TimeCoverageRelationStatistics Valid=364, Invalid=896, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:39:46,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48637 states. [2021-07-09 18:39:47,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48637 to 43264. [2021-07-09 18:39:47,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43264 states, 43263 states have (on average 2.899382844462936) internal successors, (125436), 43263 states have internal predecessors, (125436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:47,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43264 states to 43264 states and 125436 transitions. [2021-07-09 18:39:47,510 INFO L78 Accepts]: Start accepts. Automaton has 43264 states and 125436 transitions. Word has length 37 [2021-07-09 18:39:47,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:47,510 INFO L482 AbstractCegarLoop]: Abstraction has 43264 states and 125436 transitions. [2021-07-09 18:39:47,510 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 18:39:47,510 INFO L276 IsEmpty]: Start isEmpty. Operand 43264 states and 125436 transitions. [2021-07-09 18:39:47,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:39:47,572 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:47,572 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:47,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:47,773 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:47,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:47,773 INFO L82 PathProgramCache]: Analyzing trace with hash -168599578, now seen corresponding path program 121 times [2021-07-09 18:39:47,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:47,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162290406] [2021-07-09 18:39:47,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:47,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:47,895 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:47,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:47,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162290406] [2021-07-09 18:39:47,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162290406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:47,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574796055] [2021-07-09 18:39:47,896 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 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 18:39:47,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:47,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:39:47,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:48,109 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:48,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574796055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:48,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:48,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 18:39:48,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332518186] [2021-07-09 18:39:48,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:39:48,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:48,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:39:48,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:39:48,110 INFO L87 Difference]: Start difference. First operand 43264 states and 125436 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 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 18:39:48,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:48,770 INFO L93 Difference]: Finished difference Result 58686 states and 170040 transitions. [2021-07-09 18:39:48,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:39:48,771 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 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 40 [2021-07-09 18:39:48,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:48,917 INFO L225 Difference]: With dead ends: 58686 [2021-07-09 18:39:48,917 INFO L226 Difference]: Without dead ends: 58556 [2021-07-09 18:39:48,918 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 426.2ms TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:39:48,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58556 states. [2021-07-09 18:39:50,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58556 to 58022. [2021-07-09 18:39:50,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58022 states, 58021 states have (on average 2.9038623946502127) internal successors, (168485), 58021 states have internal predecessors, (168485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:50,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58022 states to 58022 states and 168485 transitions. [2021-07-09 18:39:50,249 INFO L78 Accepts]: Start accepts. Automaton has 58022 states and 168485 transitions. Word has length 40 [2021-07-09 18:39:50,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:50,249 INFO L482 AbstractCegarLoop]: Abstraction has 58022 states and 168485 transitions. [2021-07-09 18:39:50,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 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 18:39:50,249 INFO L276 IsEmpty]: Start isEmpty. Operand 58022 states and 168485 transitions. [2021-07-09 18:39:50,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:39:50,347 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:50,347 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:50,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:50,548 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:50,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:50,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1587056994, now seen corresponding path program 122 times [2021-07-09 18:39:50,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:50,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398078834] [2021-07-09 18:39:50,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:50,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:50,874 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:50,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:50,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398078834] [2021-07-09 18:39:50,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398078834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:50,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155156830] [2021-07-09 18:39:50,874 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 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 18:39:50,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:39:50,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:50,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:39:50,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:51,099 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:51,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155156830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:51,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:51,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-07-09 18:39:51,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80006522] [2021-07-09 18:39:51,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:39:51,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:51,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:39:51,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:39:51,100 INFO L87 Difference]: Start difference. First operand 58022 states and 168485 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 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 18:39:51,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:51,598 INFO L93 Difference]: Finished difference Result 59437 states and 172239 transitions. [2021-07-09 18:39:51,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:39:51,599 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 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 40 [2021-07-09 18:39:51,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:51,746 INFO L225 Difference]: With dead ends: 59437 [2021-07-09 18:39:51,746 INFO L226 Difference]: Without dead ends: 59301 [2021-07-09 18:39:51,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 247.6ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:39:52,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59301 states. [2021-07-09 18:39:52,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59301 to 51338. [2021-07-09 18:39:52,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51338 states, 51337 states have (on average 2.8983579094999707) internal successors, (148793), 51337 states have internal predecessors, (148793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:53,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51338 states to 51338 states and 148793 transitions. [2021-07-09 18:39:53,005 INFO L78 Accepts]: Start accepts. Automaton has 51338 states and 148793 transitions. Word has length 40 [2021-07-09 18:39:53,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:53,005 INFO L482 AbstractCegarLoop]: Abstraction has 51338 states and 148793 transitions. [2021-07-09 18:39:53,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 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 18:39:53,005 INFO L276 IsEmpty]: Start isEmpty. Operand 51338 states and 148793 transitions. [2021-07-09 18:39:53,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:39:53,386 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:53,386 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:53,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-07-09 18:39:53,599 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:53,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:53,600 INFO L82 PathProgramCache]: Analyzing trace with hash -278483584, now seen corresponding path program 123 times [2021-07-09 18:39:53,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:53,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602117257] [2021-07-09 18:39:53,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:53,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:53,682 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:53,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:53,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602117257] [2021-07-09 18:39:53,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602117257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:53,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570694995] [2021-07-09 18:39:53,683 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 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 18:39:53,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:39:53,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:53,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:39:53,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:53,905 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:53,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570694995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:53,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:53,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-07-09 18:39:53,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035029724] [2021-07-09 18:39:53,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:39:53,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:53,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:39:53,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:39:53,906 INFO L87 Difference]: Start difference. First operand 51338 states and 148793 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 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 18:39:54,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:54,323 INFO L93 Difference]: Finished difference Result 54288 states and 157054 transitions. [2021-07-09 18:39:54,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:39:54,324 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 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 40 [2021-07-09 18:39:54,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:54,478 INFO L225 Difference]: With dead ends: 54288 [2021-07-09 18:39:54,478 INFO L226 Difference]: Without dead ends: 54157 [2021-07-09 18:39:54,478 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 222.5ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:39:54,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54157 states. [2021-07-09 18:39:55,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54157 to 49332. [2021-07-09 18:39:55,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49332 states, 49331 states have (on average 2.899920942206726) internal successors, (143056), 49331 states have internal predecessors, (143056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:55,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49332 states to 49332 states and 143056 transitions. [2021-07-09 18:39:55,640 INFO L78 Accepts]: Start accepts. Automaton has 49332 states and 143056 transitions. Word has length 40 [2021-07-09 18:39:55,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:55,641 INFO L482 AbstractCegarLoop]: Abstraction has 49332 states and 143056 transitions. [2021-07-09 18:39:55,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 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 18:39:55,641 INFO L276 IsEmpty]: Start isEmpty. Operand 49332 states and 143056 transitions. [2021-07-09 18:39:55,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:39:55,716 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:55,716 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:55,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-07-09 18:39:55,916 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:55,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:55,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1999940992, now seen corresponding path program 124 times [2021-07-09 18:39:55,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:55,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765337131] [2021-07-09 18:39:55,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:55,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:56,145 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 12 [2021-07-09 18:39:56,172 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:39:56,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:56,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765337131] [2021-07-09 18:39:56,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765337131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:56,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178412215] [2021-07-09 18:39:56,172 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 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 18:39:56,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:39:56,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:56,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:39:56,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:56,396 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:56,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178412215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:56,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:56,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-07-09 18:39:56,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806899926] [2021-07-09 18:39:56,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:39:56,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:56,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:39:56,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:39:56,397 INFO L87 Difference]: Start difference. First operand 49332 states and 143056 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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 18:39:56,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:56,808 INFO L93 Difference]: Finished difference Result 50140 states and 145062 transitions. [2021-07-09 18:39:56,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:39:56,808 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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 40 [2021-07-09 18:39:56,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:56,925 INFO L225 Difference]: With dead ends: 50140 [2021-07-09 18:39:56,925 INFO L226 Difference]: Without dead ends: 50002 [2021-07-09 18:39:56,925 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 394.4ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:39:56,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50002 states. [2021-07-09 18:39:57,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50002 to 49328. [2021-07-09 18:39:57,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49328 states, 49327 states have (on average 2.898169359579946) internal successors, (142958), 49327 states have internal predecessors, (142958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:58,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49328 states to 49328 states and 142958 transitions. [2021-07-09 18:39:58,047 INFO L78 Accepts]: Start accepts. Automaton has 49328 states and 142958 transitions. Word has length 40 [2021-07-09 18:39:58,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:58,047 INFO L482 AbstractCegarLoop]: Abstraction has 49328 states and 142958 transitions. [2021-07-09 18:39:58,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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 18:39:58,047 INFO L276 IsEmpty]: Start isEmpty. Operand 49328 states and 142958 transitions. [2021-07-09 18:39:58,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:39:58,118 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:58,118 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:58,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-07-09 18:39:58,319 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:58,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:58,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1295591104, now seen corresponding path program 125 times [2021-07-09 18:39:58,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:58,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044817639] [2021-07-09 18:39:58,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:58,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:58,437 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:58,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:58,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044817639] [2021-07-09 18:39:58,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044817639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:58,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519426241] [2021-07-09 18:39:58,437 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 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 18:39:58,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:39:58,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:58,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:39:58,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:58,829 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:58,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519426241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:58,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:58,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-09 18:39:58,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963904992] [2021-07-09 18:39:58,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:39:58,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:58,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:39:58,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:39:58,830 INFO L87 Difference]: Start difference. First operand 49328 states and 142958 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 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 18:39:59,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:59,272 INFO L93 Difference]: Finished difference Result 50012 states and 144533 transitions. [2021-07-09 18:39:59,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:39:59,273 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 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 40 [2021-07-09 18:39:59,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:59,393 INFO L225 Difference]: With dead ends: 50012 [2021-07-09 18:39:59,393 INFO L226 Difference]: Without dead ends: 49858 [2021-07-09 18:39:59,394 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 410.8ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:39:59,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49858 states. [2021-07-09 18:40:00,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49858 to 44902. [2021-07-09 18:40:00,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44902 states, 44901 states have (on average 2.895815237967974) internal successors, (130025), 44901 states have internal predecessors, (130025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:00,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44902 states to 44902 states and 130025 transitions. [2021-07-09 18:40:00,485 INFO L78 Accepts]: Start accepts. Automaton has 44902 states and 130025 transitions. Word has length 40 [2021-07-09 18:40:00,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:00,485 INFO L482 AbstractCegarLoop]: Abstraction has 44902 states and 130025 transitions. [2021-07-09 18:40:00,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 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 18:40:00,485 INFO L276 IsEmpty]: Start isEmpty. Operand 44902 states and 130025 transitions. [2021-07-09 18:40:00,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:40:00,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:00,560 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:00,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:00,760 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:00,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:00,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1712941184, now seen corresponding path program 126 times [2021-07-09 18:40:00,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:00,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526261633] [2021-07-09 18:40:00,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:00,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:00,861 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:00,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:00,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526261633] [2021-07-09 18:40:00,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526261633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:00,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166628952] [2021-07-09 18:40:00,861 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 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 18:40:00,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:40:00,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:00,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:40:00,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:01,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166628952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:01,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:01,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 21 [2021-07-09 18:40:01,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873841661] [2021-07-09 18:40:01,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:40:01,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:01,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:40:01,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:40:01,093 INFO L87 Difference]: Start difference. First operand 44902 states and 130025 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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 18:40:01,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:01,889 INFO L93 Difference]: Finished difference Result 53560 states and 155441 transitions. [2021-07-09 18:40:01,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:40:01,892 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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 40 [2021-07-09 18:40:01,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:02,025 INFO L225 Difference]: With dead ends: 53560 [2021-07-09 18:40:02,026 INFO L226 Difference]: Without dead ends: 53454 [2021-07-09 18:40:02,026 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 352.4ms TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:40:02,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53454 states. [2021-07-09 18:40:03,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53454 to 52666. [2021-07-09 18:40:03,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52666 states, 52665 states have (on average 2.9090477546757807) internal successors, (153205), 52665 states have internal predecessors, (153205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:03,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52666 states to 52666 states and 153205 transitions. [2021-07-09 18:40:03,281 INFO L78 Accepts]: Start accepts. Automaton has 52666 states and 153205 transitions. Word has length 40 [2021-07-09 18:40:03,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:03,281 INFO L482 AbstractCegarLoop]: Abstraction has 52666 states and 153205 transitions. [2021-07-09 18:40:03,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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 18:40:03,281 INFO L276 IsEmpty]: Start isEmpty. Operand 52666 states and 153205 transitions. [2021-07-09 18:40:03,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:40:03,376 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:03,376 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:03,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:03,577 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:03,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:03,577 INFO L82 PathProgramCache]: Analyzing trace with hash 707939840, now seen corresponding path program 127 times [2021-07-09 18:40:03,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:03,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139384573] [2021-07-09 18:40:03,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:03,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:03,673 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:03,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:03,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139384573] [2021-07-09 18:40:03,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139384573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:03,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711394040] [2021-07-09 18:40:03,674 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 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 18:40:03,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:03,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:40:03,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:04,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711394040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:04,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:04,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-07-09 18:40:04,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101319866] [2021-07-09 18:40:04,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:40:04,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:04,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:40:04,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:40:04,098 INFO L87 Difference]: Start difference. First operand 52666 states and 153205 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 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 18:40:04,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:04,666 INFO L93 Difference]: Finished difference Result 54310 states and 157576 transitions. [2021-07-09 18:40:04,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:40:04,666 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 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 40 [2021-07-09 18:40:04,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:04,814 INFO L225 Difference]: With dead ends: 54310 [2021-07-09 18:40:04,814 INFO L226 Difference]: Without dead ends: 54186 [2021-07-09 18:40:04,814 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 282.4ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:40:04,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54186 states. [2021-07-09 18:40:05,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54186 to 52670. [2021-07-09 18:40:05,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52670 states, 52669 states have (on average 2.9054092540203915) internal successors, (153025), 52669 states have internal predecessors, (153025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:06,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52670 states to 52670 states and 153025 transitions. [2021-07-09 18:40:06,117 INFO L78 Accepts]: Start accepts. Automaton has 52670 states and 153025 transitions. Word has length 40 [2021-07-09 18:40:06,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:06,117 INFO L482 AbstractCegarLoop]: Abstraction has 52670 states and 153025 transitions. [2021-07-09 18:40:06,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 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 18:40:06,117 INFO L276 IsEmpty]: Start isEmpty. Operand 52670 states and 153025 transitions. [2021-07-09 18:40:06,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:40:06,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:06,215 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:06,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:06,416 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:06,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:06,416 INFO L82 PathProgramCache]: Analyzing trace with hash 858134054, now seen corresponding path program 128 times [2021-07-09 18:40:06,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:06,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960547827] [2021-07-09 18:40:06,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:06,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:06,507 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:06,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:06,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960547827] [2021-07-09 18:40:06,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960547827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:06,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957791863] [2021-07-09 18:40:06,508 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 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 18:40:06,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:06,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:06,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:40:06,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:06,911 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-07-09 18:40:06,927 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:06,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957791863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:06,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:06,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-07-09 18:40:06,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141935807] [2021-07-09 18:40:06,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:40:06,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:06,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:40:06,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:40:06,928 INFO L87 Difference]: Start difference. First operand 52670 states and 153025 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:07,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:07,813 INFO L93 Difference]: Finished difference Result 57020 states and 165804 transitions. [2021-07-09 18:40:07,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:40:07,814 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:40:07,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:07,965 INFO L225 Difference]: With dead ends: 57020 [2021-07-09 18:40:07,965 INFO L226 Difference]: Without dead ends: 56880 [2021-07-09 18:40:07,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 521.1ms TimeCoverageRelationStatistics Valid=148, Invalid=1334, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:40:08,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56880 states.