/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-4-semi-Q67.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 07:11:20,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 07:11:20,117 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 07:11:20,152 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 07:11:20,202 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 07:11:20,203 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 07:11:20,203 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 07:11:20,207 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 [2021-06-05 07:11:20,241 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 07:11:20,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 07:11:20,242 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 07:11:20,242 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 07:11:20,244 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 07:11:20,244 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 07:11:20,244 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 07:11:20,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 07:11:20,245 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 07:11:20,245 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 07:11:20,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 07:11:20,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 07:11:20,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 07:11:20,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 07:11:20,246 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 07:11:20,247 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 07:11:20,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 07:11:20,247 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 07:11:20,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 07:11:20,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 07:11:20,247 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 07:11:20,248 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 07:11:20,248 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 07:11:20,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 07:11:20,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 07:11:20,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 07:11:20,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 07:11:20,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 07:11:20,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 07:11:20,249 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 07:11:20,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 07:11:20,249 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 07:11:20,542 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 07:11:20,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 07:11:20,561 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 07:11:20,562 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 07:11:20,563 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 07:11:20,563 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-4-semi-Q67.wvr.bpl [2021-06-05 07:11:20,564 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-4-semi-Q67.wvr.bpl' [2021-06-05 07:11:20,604 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 07:11:20,605 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 07:11:20,607 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 07:11:20,607 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 07:11:20,607 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 07:11:20,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:11:20" (1/1) ... [2021-06-05 07:11:20,630 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:11:20" (1/1) ... [2021-06-05 07:11:20,637 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 07:11:20,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 07:11:20,639 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 07:11:20,639 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 07:11:20,646 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:11:20" (1/1) ... [2021-06-05 07:11:20,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:11:20" (1/1) ... [2021-06-05 07:11:20,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:11:20" (1/1) ... [2021-06-05 07:11:20,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:11:20" (1/1) ... [2021-06-05 07:11:20,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:11:20" (1/1) ... [2021-06-05 07:11:20,657 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:11:20" (1/1) ... [2021-06-05 07:11:20,658 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:11:20" (1/1) ... [2021-06-05 07:11:20,662 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 07:11:20,663 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 07:11:20,663 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 07:11:20,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 07:11:20,665 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:11:20" (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 [2021-06-05 07:11:20,746 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 07:11:20,746 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 07:11:20,747 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 07:11:20,747 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 07:11:20,747 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 07:11:20,747 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 07:11:20,747 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 07:11:20,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 07:11:20,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 07:11:20,748 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 07:11:20,748 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 07:11:20,748 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 07:11:20,748 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 07:11:20,748 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 07:11:20,748 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 07:11:20,749 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 07:11:21,024 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 07:11:21,025 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 07:11:21,026 INFO L202 PluginConnector]: Adding new model counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 07:11:21 BoogieIcfgContainer [2021-06-05 07:11:21,026 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 07:11:21,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 07:11:21,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 07:11:21,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 07:11:21,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:11:20" (1/2) ... [2021-06-05 07:11:21,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c437f1b and model type counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 07:11:21, skipping insertion in model container [2021-06-05 07:11:21,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 07:11:21" (2/2) ... [2021-06-05 07:11:21,032 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-add-4-semi-Q67.wvr.bpl [2021-06-05 07:11:21,053 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 07:11:21,054 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 07:11:21,054 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 07:11:21,055 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 07:11:21,148 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 07:11:21,187 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 07:11:21,212 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 07:11:21,212 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 07:11:21,212 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 07:11:21,213 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 07:11:21,213 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 07:11:21,213 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 07:11:21,213 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 07:11:21,213 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 07:11:21,227 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-06-05 07:11:21,284 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 433 states, 431 states have (on average 3.8445475638051043) internal successors, (1657), 432 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:21,287 INFO L276 IsEmpty]: Start isEmpty. Operand has 433 states, 431 states have (on average 3.8445475638051043) internal successors, (1657), 432 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:21,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 07:11:21,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:21,310 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:21,310 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:21,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:21,318 INFO L82 PathProgramCache]: Analyzing trace with hash -346285064, now seen corresponding path program 1 times [2021-06-05 07:11:21,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:21,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033012773] [2021-06-05 07:11:21,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:21,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:21,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:21,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:21,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033012773] [2021-06-05 07:11:21,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033012773] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:11:21,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:11:21,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 07:11:21,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387902826] [2021-06-05 07:11:21,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 07:11:21,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:21,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 07:11:21,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 07:11:21,526 INFO L87 Difference]: Start difference. First operand has 433 states, 431 states have (on average 3.8445475638051043) internal successors, (1657), 432 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:21,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:21,588 INFO L93 Difference]: Finished difference Result 856 states and 3119 transitions. [2021-06-05 07:11:21,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 07:11:21,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 07:11:21,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:21,607 INFO L225 Difference]: With dead ends: 856 [2021-06-05 07:11:21,608 INFO L226 Difference]: Without dead ends: 731 [2021-06-05 07:11:21,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 07:11:21,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-06-05 07:11:21,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 697. [2021-06-05 07:11:21,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 3.7241379310344827) internal successors, (2592), 696 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:21,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 2592 transitions. [2021-06-05 07:11:21,706 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 2592 transitions. Word has length 21 [2021-06-05 07:11:21,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:21,707 INFO L482 AbstractCegarLoop]: Abstraction has 697 states and 2592 transitions. [2021-06-05 07:11:21,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:21,707 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 2592 transitions. [2021-06-05 07:11:21,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:11:21,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:21,710 INFO L521 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] [2021-06-05 07:11:21,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 07:11:21,711 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:21,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:21,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1325518410, now seen corresponding path program 1 times [2021-06-05 07:11:21,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:21,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047505725] [2021-06-05 07:11:21,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:21,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:21,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:21,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:21,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047505725] [2021-06-05 07:11:21,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047505725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:21,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672150018] [2021-06-05 07:11:21,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:21,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:21,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 07:11:21,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:21,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:21,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672150018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:21,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:21,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-06-05 07:11:21,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944769781] [2021-06-05 07:11:21,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:11:21,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:21,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:11:22,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:11:22,000 INFO L87 Difference]: Start difference. First operand 697 states and 2592 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:22,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:22,088 INFO L93 Difference]: Finished difference Result 1527 states and 5658 transitions. [2021-06-05 07:11:22,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 07:11:22,089 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 07:11:22,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:22,099 INFO L225 Difference]: With dead ends: 1527 [2021-06-05 07:11:22,099 INFO L226 Difference]: Without dead ends: 1527 [2021-06-05 07:11:22,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:11:22,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2021-06-05 07:11:22,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 837. [2021-06-05 07:11:22,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 3.77511961722488) internal successors, (3156), 836 states have internal predecessors, (3156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:22,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 3156 transitions. [2021-06-05 07:11:22,144 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 3156 transitions. Word has length 23 [2021-06-05 07:11:22,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:22,144 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 3156 transitions. [2021-06-05 07:11:22,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:22,144 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 3156 transitions. [2021-06-05 07:11:22,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:11:22,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:22,147 INFO L521 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] [2021-06-05 07:11:22,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 07:11:22,369 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:22,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:22,369 INFO L82 PathProgramCache]: Analyzing trace with hash -622773130, now seen corresponding path program 1 times [2021-06-05 07:11:22,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:22,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856025281] [2021-06-05 07:11:22,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:22,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:22,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:22,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:22,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856025281] [2021-06-05 07:11:22,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856025281] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:11:22,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:11:22,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 07:11:22,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828339877] [2021-06-05 07:11:22,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:11:22,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:22,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:11:22,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:11:22,466 INFO L87 Difference]: Start difference. First operand 837 states and 3156 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:22,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:22,587 INFO L93 Difference]: Finished difference Result 1186 states and 4244 transitions. [2021-06-05 07:11:22,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 07:11:22,588 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 07:11:22,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:22,595 INFO L225 Difference]: With dead ends: 1186 [2021-06-05 07:11:22,595 INFO L226 Difference]: Without dead ends: 1076 [2021-06-05 07:11:22,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:11:22,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2021-06-05 07:11:22,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 805. [2021-06-05 07:11:22,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 3.798507462686567) internal successors, (3054), 804 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:22,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 3054 transitions. [2021-06-05 07:11:22,626 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 3054 transitions. Word has length 23 [2021-06-05 07:11:22,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:22,627 INFO L482 AbstractCegarLoop]: Abstraction has 805 states and 3054 transitions. [2021-06-05 07:11:22,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:22,627 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 3054 transitions. [2021-06-05 07:11:22,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:11:22,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:22,629 INFO L521 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] [2021-06-05 07:11:22,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 07:11:22,630 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:22,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:22,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1350746626, now seen corresponding path program 2 times [2021-06-05 07:11:22,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:22,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163832919] [2021-06-05 07:11:22,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:22,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:22,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:22,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163832919] [2021-06-05 07:11:22,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163832919] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:11:22,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:11:22,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 07:11:22,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828038091] [2021-06-05 07:11:22,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 07:11:22,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:22,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 07:11:22,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:11:22,664 INFO L87 Difference]: Start difference. First operand 805 states and 3054 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:22,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:22,701 INFO L93 Difference]: Finished difference Result 1022 states and 3745 transitions. [2021-06-05 07:11:22,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 07:11:22,702 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 07:11:22,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:22,708 INFO L225 Difference]: With dead ends: 1022 [2021-06-05 07:11:22,708 INFO L226 Difference]: Without dead ends: 1022 [2021-06-05 07:11:22,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:11:22,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2021-06-05 07:11:22,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 847. [2021-06-05 07:11:22,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 3.75177304964539) internal successors, (3174), 846 states have internal predecessors, (3174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:22,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 3174 transitions. [2021-06-05 07:11:22,737 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 3174 transitions. Word has length 23 [2021-06-05 07:11:22,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:22,737 INFO L482 AbstractCegarLoop]: Abstraction has 847 states and 3174 transitions. [2021-06-05 07:11:22,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:22,737 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 3174 transitions. [2021-06-05 07:11:22,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:11:22,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:22,740 INFO L521 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] [2021-06-05 07:11:22,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 07:11:22,740 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:22,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:22,741 INFO L82 PathProgramCache]: Analyzing trace with hash 84290046, now seen corresponding path program 2 times [2021-06-05 07:11:22,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:22,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78063361] [2021-06-05 07:11:22,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:22,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:22,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:22,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78063361] [2021-06-05 07:11:22,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78063361] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:11:22,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:11:22,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 07:11:22,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163724115] [2021-06-05 07:11:22,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:11:22,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:22,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:11:22,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:11:22,786 INFO L87 Difference]: Start difference. First operand 847 states and 3174 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:22,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:22,851 INFO L93 Difference]: Finished difference Result 1324 states and 4824 transitions. [2021-06-05 07:11:22,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 07:11:22,851 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 07:11:22,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:22,859 INFO L225 Difference]: With dead ends: 1324 [2021-06-05 07:11:22,859 INFO L226 Difference]: Without dead ends: 1288 [2021-06-05 07:11:22,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:11:22,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-06-05 07:11:22,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 893. [2021-06-05 07:11:22,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.7387892376681613) internal successors, (3335), 892 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:22,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3335 transitions. [2021-06-05 07:11:22,892 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3335 transitions. Word has length 23 [2021-06-05 07:11:22,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:22,892 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3335 transitions. [2021-06-05 07:11:22,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:22,892 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3335 transitions. [2021-06-05 07:11:22,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:11:22,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:22,895 INFO L521 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] [2021-06-05 07:11:22,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 07:11:22,895 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:22,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:22,896 INFO L82 PathProgramCache]: Analyzing trace with hash 227514278, now seen corresponding path program 3 times [2021-06-05 07:11:22,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:22,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004665916] [2021-06-05 07:11:22,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:22,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:22,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:22,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:22,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004665916] [2021-06-05 07:11:22,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004665916] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:11:22,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:11:22,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 07:11:22,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277398199] [2021-06-05 07:11:22,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 07:11:22,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:22,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 07:11:22,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:11:22,928 INFO L87 Difference]: Start difference. First operand 893 states and 3335 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:22,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:22,973 INFO L93 Difference]: Finished difference Result 1414 states and 5206 transitions. [2021-06-05 07:11:22,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 07:11:22,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 07:11:22,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:22,982 INFO L225 Difference]: With dead ends: 1414 [2021-06-05 07:11:22,983 INFO L226 Difference]: Without dead ends: 1392 [2021-06-05 07:11:22,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:11:22,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2021-06-05 07:11:23,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1109. [2021-06-05 07:11:23,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1109 states, 1108 states have (on average 3.8140794223826715) internal successors, (4226), 1108 states have internal predecessors, (4226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:23,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 4226 transitions. [2021-06-05 07:11:23,021 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 4226 transitions. Word has length 23 [2021-06-05 07:11:23,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:23,021 INFO L482 AbstractCegarLoop]: Abstraction has 1109 states and 4226 transitions. [2021-06-05 07:11:23,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:23,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 4226 transitions. [2021-06-05 07:11:23,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:11:23,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:23,024 INFO L521 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] [2021-06-05 07:11:23,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 07:11:23,025 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:23,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:23,025 INFO L82 PathProgramCache]: Analyzing trace with hash -162447450, now seen corresponding path program 4 times [2021-06-05 07:11:23,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:23,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111096383] [2021-06-05 07:11:23,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:23,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:23,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:23,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:23,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111096383] [2021-06-05 07:11:23,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111096383] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:11:23,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:11:23,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 07:11:23,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855128752] [2021-06-05 07:11:23,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:11:23,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:23,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:11:23,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:11:23,071 INFO L87 Difference]: Start difference. First operand 1109 states and 4226 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:23,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:23,111 INFO L93 Difference]: Finished difference Result 1451 states and 5463 transitions. [2021-06-05 07:11:23,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 07:11:23,112 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 07:11:23,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:23,121 INFO L225 Difference]: With dead ends: 1451 [2021-06-05 07:11:23,122 INFO L226 Difference]: Without dead ends: 1451 [2021-06-05 07:11:23,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:11:23,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-06-05 07:11:23,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1131. [2021-06-05 07:11:23,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 3.8230088495575223) internal successors, (4320), 1130 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:23,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 4320 transitions. [2021-06-05 07:11:23,167 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 4320 transitions. Word has length 23 [2021-06-05 07:11:23,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:23,167 INFO L482 AbstractCegarLoop]: Abstraction has 1131 states and 4320 transitions. [2021-06-05 07:11:23,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:23,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 4320 transitions. [2021-06-05 07:11:23,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:11:23,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:23,171 INFO L521 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] [2021-06-05 07:11:23,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 07:11:23,172 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:23,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:23,172 INFO L82 PathProgramCache]: Analyzing trace with hash 770281974, now seen corresponding path program 1 times [2021-06-05 07:11:23,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:23,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059994406] [2021-06-05 07:11:23,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:23,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:23,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:11:23,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:23,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059994406] [2021-06-05 07:11:23,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059994406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:23,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561433620] [2021-06-05 07:11:23,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:23,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:23,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 07:11:23,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:23,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:11:23,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561433620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:23,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:23,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-06-05 07:11:23,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698733602] [2021-06-05 07:11:23,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:11:23,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:23,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:11:23,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:11:23,419 INFO L87 Difference]: Start difference. First operand 1131 states and 4320 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:23,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:23,519 INFO L93 Difference]: Finished difference Result 1625 states and 6043 transitions. [2021-06-05 07:11:23,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 07:11:23,520 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:11:23,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:23,529 INFO L225 Difference]: With dead ends: 1625 [2021-06-05 07:11:23,529 INFO L226 Difference]: Without dead ends: 1546 [2021-06-05 07:11:23,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:11:23,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2021-06-05 07:11:23,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1118. [2021-06-05 07:11:23,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.819158460161146) internal successors, (4266), 1117 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:23,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4266 transitions. [2021-06-05 07:11:23,565 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4266 transitions. Word has length 25 [2021-06-05 07:11:23,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:23,566 INFO L482 AbstractCegarLoop]: Abstraction has 1118 states and 4266 transitions. [2021-06-05 07:11:23,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:23,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4266 transitions. [2021-06-05 07:11:23,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:11:23,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:23,570 INFO L521 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] [2021-06-05 07:11:23,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:23,785 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:23,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:23,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1325590424, now seen corresponding path program 2 times [2021-06-05 07:11:23,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:23,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100484757] [2021-06-05 07:11:23,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:23,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:23,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:11:23,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:23,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100484757] [2021-06-05 07:11:23,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100484757] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:11:23,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:11:23,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 07:11:23,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014725512] [2021-06-05 07:11:23,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 07:11:23,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:23,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 07:11:23,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:11:23,839 INFO L87 Difference]: Start difference. First operand 1118 states and 4266 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:23,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:23,864 INFO L93 Difference]: Finished difference Result 1338 states and 5014 transitions. [2021-06-05 07:11:23,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 07:11:23,864 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:11:23,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:23,872 INFO L225 Difference]: With dead ends: 1338 [2021-06-05 07:11:23,872 INFO L226 Difference]: Without dead ends: 1338 [2021-06-05 07:11:23,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:11:23,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2021-06-05 07:11:23,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1133. [2021-06-05 07:11:23,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1132 states have (on average 3.795936395759717) internal successors, (4297), 1132 states have internal predecessors, (4297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:23,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 4297 transitions. [2021-06-05 07:11:23,905 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 4297 transitions. Word has length 25 [2021-06-05 07:11:23,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:23,906 INFO L482 AbstractCegarLoop]: Abstraction has 1133 states and 4297 transitions. [2021-06-05 07:11:23,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:23,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 4297 transitions. [2021-06-05 07:11:23,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:11:23,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:23,909 INFO L521 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] [2021-06-05 07:11:23,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 07:11:23,909 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:23,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:23,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1169689052, now seen corresponding path program 1 times [2021-06-05 07:11:23,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:23,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391258087] [2021-06-05 07:11:23,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:23,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:23,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:23,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:23,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391258087] [2021-06-05 07:11:23,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391258087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:23,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843573183] [2021-06-05 07:11:23,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:24,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:24,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 07:11:24,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:24,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:24,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843573183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:24,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:24,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-06-05 07:11:24,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980180360] [2021-06-05 07:11:24,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:11:24,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:24,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:11:24,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:11:24,110 INFO L87 Difference]: Start difference. First operand 1133 states and 4297 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:24,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:24,173 INFO L93 Difference]: Finished difference Result 1711 states and 6371 transitions. [2021-06-05 07:11:24,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 07:11:24,174 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:11:24,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:24,186 INFO L225 Difference]: With dead ends: 1711 [2021-06-05 07:11:24,187 INFO L226 Difference]: Without dead ends: 1659 [2021-06-05 07:11:24,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:11:24,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2021-06-05 07:11:24,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1105. [2021-06-05 07:11:24,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1104 states have (on average 3.7871376811594204) internal successors, (4181), 1104 states have internal predecessors, (4181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:24,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 4181 transitions. [2021-06-05 07:11:24,219 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 4181 transitions. Word has length 25 [2021-06-05 07:11:24,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:24,219 INFO L482 AbstractCegarLoop]: Abstraction has 1105 states and 4181 transitions. [2021-06-05 07:11:24,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:24,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 4181 transitions. [2021-06-05 07:11:24,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:11:24,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:24,222 INFO L521 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] [2021-06-05 07:11:24,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 07:11:24,437 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:24,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:24,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1094939800, now seen corresponding path program 3 times [2021-06-05 07:11:24,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:24,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236234922] [2021-06-05 07:11:24,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:24,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:24,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:11:24,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:24,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236234922] [2021-06-05 07:11:24,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236234922] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:11:24,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:11:24,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 07:11:24,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437860416] [2021-06-05 07:11:24,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 07:11:24,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:24,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 07:11:24,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:11:24,478 INFO L87 Difference]: Start difference. First operand 1105 states and 4181 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:24,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:24,523 INFO L93 Difference]: Finished difference Result 1111 states and 4195 transitions. [2021-06-05 07:11:24,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 07:11:24,523 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:11:24,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:24,527 INFO L225 Difference]: With dead ends: 1111 [2021-06-05 07:11:24,528 INFO L226 Difference]: Without dead ends: 946 [2021-06-05 07:11:24,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:11:24,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-06-05 07:11:24,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 858. [2021-06-05 07:11:24,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.8751458576429405) internal successors, (3321), 857 states have internal predecessors, (3321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:24,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 3321 transitions. [2021-06-05 07:11:24,553 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 3321 transitions. Word has length 25 [2021-06-05 07:11:24,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:24,554 INFO L482 AbstractCegarLoop]: Abstraction has 858 states and 3321 transitions. [2021-06-05 07:11:24,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:24,554 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 3321 transitions. [2021-06-05 07:11:24,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:11:24,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:24,557 INFO L521 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] [2021-06-05 07:11:24,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 07:11:24,557 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:24,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:24,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1165509964, now seen corresponding path program 1 times [2021-06-05 07:11:24,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:24,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331789335] [2021-06-05 07:11:24,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:24,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:24,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:24,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331789335] [2021-06-05 07:11:24,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331789335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:24,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105025869] [2021-06-05 07:11:24,592 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) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:24,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 07:11:24,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:24,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:24,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105025869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:24,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:24,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-06-05 07:11:24,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914628363] [2021-06-05 07:11:24,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:11:24,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:24,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:11:24,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:11:24,716 INFO L87 Difference]: Start difference. First operand 858 states and 3321 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 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) [2021-06-05 07:11:24,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:24,779 INFO L93 Difference]: Finished difference Result 2765 states and 10475 transitions. [2021-06-05 07:11:24,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 07:11:24,780 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 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 27 [2021-06-05 07:11:24,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:24,789 INFO L225 Difference]: With dead ends: 2765 [2021-06-05 07:11:24,789 INFO L226 Difference]: Without dead ends: 2631 [2021-06-05 07:11:24,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:11:24,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2021-06-05 07:11:24,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 1964. [2021-06-05 07:11:24,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1963 states have (on average 3.905756495160469) internal successors, (7667), 1963 states have internal predecessors, (7667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:24,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 7667 transitions. [2021-06-05 07:11:24,857 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 7667 transitions. Word has length 27 [2021-06-05 07:11:24,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:24,858 INFO L482 AbstractCegarLoop]: Abstraction has 1964 states and 7667 transitions. [2021-06-05 07:11:24,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 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) [2021-06-05 07:11:24,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 7667 transitions. [2021-06-05 07:11:24,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 07:11:24,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:24,864 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:25,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:25,084 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:25,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:25,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1684408818, now seen corresponding path program 2 times [2021-06-05 07:11:25,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:25,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779279568] [2021-06-05 07:11:25,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:25,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:25,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 07:11:25,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:25,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779279568] [2021-06-05 07:11:25,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779279568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:25,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079235767] [2021-06-05 07:11:25,151 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 [2021-06-05 07:11:25,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:11:25,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:25,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 07:11:25,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 07:11:25,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079235767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:25,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:25,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-06-05 07:11:25,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146693208] [2021-06-05 07:11:25,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:11:25,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:25,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:11:25,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:11:25,296 INFO L87 Difference]: Start difference. First operand 1964 states and 7667 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:25,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:25,407 INFO L93 Difference]: Finished difference Result 2660 states and 10383 transitions. [2021-06-05 07:11:25,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 07:11:25,407 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 07:11:25,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:25,417 INFO L225 Difference]: With dead ends: 2660 [2021-06-05 07:11:25,417 INFO L226 Difference]: Without dead ends: 2660 [2021-06-05 07:11:25,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:11:25,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2021-06-05 07:11:25,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 2137. [2021-06-05 07:11:25,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2136 states have (on average 3.9307116104868913) internal successors, (8396), 2136 states have internal predecessors, (8396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:25,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 8396 transitions. [2021-06-05 07:11:25,487 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 8396 transitions. Word has length 29 [2021-06-05 07:11:25,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:25,487 INFO L482 AbstractCegarLoop]: Abstraction has 2137 states and 8396 transitions. [2021-06-05 07:11:25,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:25,488 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 8396 transitions. [2021-06-05 07:11:25,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 07:11:25,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:25,494 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:25,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 07:11:25,709 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:25,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:25,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1964960968, now seen corresponding path program 1 times [2021-06-05 07:11:25,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:25,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241875145] [2021-06-05 07:11:25,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:25,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:25,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:11:25,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:25,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241875145] [2021-06-05 07:11:25,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241875145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:25,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114996467] [2021-06-05 07:11:25,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-05 07:11:25,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:25,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:11:25,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:25,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:25,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114996467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:25,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:25,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 07:11:25,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582101783] [2021-06-05 07:11:25,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:11:25,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:25,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:11:25,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:11:25,890 INFO L87 Difference]: Start difference. First operand 2137 states and 8396 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 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) [2021-06-05 07:11:25,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:25,965 INFO L93 Difference]: Finished difference Result 2794 states and 10644 transitions. [2021-06-05 07:11:25,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 07:11:25,966 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 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 29 [2021-06-05 07:11:25,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:25,975 INFO L225 Difference]: With dead ends: 2794 [2021-06-05 07:11:25,975 INFO L226 Difference]: Without dead ends: 2640 [2021-06-05 07:11:25,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:11:25,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2021-06-05 07:11:26,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 1918. [2021-06-05 07:11:26,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1918 states, 1917 states have (on average 3.9431403234220137) internal successors, (7559), 1917 states have internal predecessors, (7559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:26,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 7559 transitions. [2021-06-05 07:11:26,030 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 7559 transitions. Word has length 29 [2021-06-05 07:11:26,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:26,030 INFO L482 AbstractCegarLoop]: Abstraction has 1918 states and 7559 transitions. [2021-06-05 07:11:26,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 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) [2021-06-05 07:11:26,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 7559 transitions. [2021-06-05 07:11:26,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 07:11:26,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:26,036 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:26,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:26,260 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:26,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:26,260 INFO L82 PathProgramCache]: Analyzing trace with hash 659344036, now seen corresponding path program 2 times [2021-06-05 07:11:26,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:26,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078037571] [2021-06-05 07:11:26,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:26,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:11:26,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:26,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078037571] [2021-06-05 07:11:26,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078037571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:26,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542639722] [2021-06-05 07:11:26,313 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 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 [2021-06-05 07:11:26,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:11:26,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:26,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:11:26,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:26,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:11:26,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542639722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:26,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:26,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-06-05 07:11:26,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917761084] [2021-06-05 07:11:26,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 07:11:26,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:26,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 07:11:26,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:11:26,479 INFO L87 Difference]: Start difference. First operand 1918 states and 7559 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:26,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:26,606 INFO L93 Difference]: Finished difference Result 5257 states and 20273 transitions. [2021-06-05 07:11:26,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:11:26,607 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 07:11:26,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:26,624 INFO L225 Difference]: With dead ends: 5257 [2021-06-05 07:11:26,624 INFO L226 Difference]: Without dead ends: 4937 [2021-06-05 07:11:26,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:11:26,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4937 states. [2021-06-05 07:11:26,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4937 to 2629. [2021-06-05 07:11:26,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2629 states, 2628 states have (on average 3.980213089802131) internal successors, (10460), 2628 states have internal predecessors, (10460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:26,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2629 states to 2629 states and 10460 transitions. [2021-06-05 07:11:26,708 INFO L78 Accepts]: Start accepts. Automaton has 2629 states and 10460 transitions. Word has length 29 [2021-06-05 07:11:26,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:26,709 INFO L482 AbstractCegarLoop]: Abstraction has 2629 states and 10460 transitions. [2021-06-05 07:11:26,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:26,709 INFO L276 IsEmpty]: Start isEmpty. Operand 2629 states and 10460 transitions. [2021-06-05 07:11:26,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 07:11:26,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:26,716 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:26,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 07:11:26,933 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:26,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:26,933 INFO L82 PathProgramCache]: Analyzing trace with hash 958895088, now seen corresponding path program 3 times [2021-06-05 07:11:26,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:26,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421705609] [2021-06-05 07:11:26,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:26,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:11:26,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:26,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421705609] [2021-06-05 07:11:26,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421705609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:26,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818688678] [2021-06-05 07:11:26,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 07:11:27,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:11:27,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:27,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 07:11:27,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:27,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:11:27,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818688678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:27,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:27,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 07:11:27,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713249355] [2021-06-05 07:11:27,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:11:27,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:27,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:11:27,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:11:27,151 INFO L87 Difference]: Start difference. First operand 2629 states and 10460 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 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) [2021-06-05 07:11:27,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:27,830 INFO L93 Difference]: Finished difference Result 11182 states and 42971 transitions. [2021-06-05 07:11:27,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:11:27,830 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 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 31 [2021-06-05 07:11:27,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:27,870 INFO L225 Difference]: With dead ends: 11182 [2021-06-05 07:11:27,870 INFO L226 Difference]: Without dead ends: 10794 [2021-06-05 07:11:27,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 415.9ms TimeCoverageRelationStatistics Valid=311, Invalid=1171, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:11:27,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10794 states. [2021-06-05 07:11:28,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10794 to 5776. [2021-06-05 07:11:28,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5776 states, 5775 states have (on average 4.045367965367966) internal successors, (23362), 5775 states have internal predecessors, (23362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:28,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5776 states to 5776 states and 23362 transitions. [2021-06-05 07:11:28,055 INFO L78 Accepts]: Start accepts. Automaton has 5776 states and 23362 transitions. Word has length 31 [2021-06-05 07:11:28,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:28,055 INFO L482 AbstractCegarLoop]: Abstraction has 5776 states and 23362 transitions. [2021-06-05 07:11:28,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 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) [2021-06-05 07:11:28,056 INFO L276 IsEmpty]: Start isEmpty. Operand 5776 states and 23362 transitions. [2021-06-05 07:11:28,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 07:11:28,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:28,077 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:28,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 07:11:28,293 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:28,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:28,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1392155722, now seen corresponding path program 4 times [2021-06-05 07:11:28,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:28,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705674966] [2021-06-05 07:11:28,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:28,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:11:28,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:28,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705674966] [2021-06-05 07:11:28,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705674966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:28,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762003226] [2021-06-05 07:11:28,361 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 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 [2021-06-05 07:11:28,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:11:28,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:28,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 07:11:28,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:28,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:11:28,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762003226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:28,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:28,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 07:11:28,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808147599] [2021-06-05 07:11:28,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:11:28,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:28,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:11:28,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:11:28,491 INFO L87 Difference]: Start difference. First operand 5776 states and 23362 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:28,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:28,728 INFO L93 Difference]: Finished difference Result 14551 states and 57252 transitions. [2021-06-05 07:11:28,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 07:11:28,733 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 07:11:28,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:28,832 INFO L225 Difference]: With dead ends: 14551 [2021-06-05 07:11:28,832 INFO L226 Difference]: Without dead ends: 13651 [2021-06-05 07:11:28,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:11:28,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13651 states. [2021-06-05 07:11:29,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13651 to 8849. [2021-06-05 07:11:29,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8849 states, 8848 states have (on average 4.189421338155515) internal successors, (37068), 8848 states have internal predecessors, (37068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:29,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8849 states to 8849 states and 37068 transitions. [2021-06-05 07:11:29,100 INFO L78 Accepts]: Start accepts. Automaton has 8849 states and 37068 transitions. Word has length 31 [2021-06-05 07:11:29,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:29,100 INFO L482 AbstractCegarLoop]: Abstraction has 8849 states and 37068 transitions. [2021-06-05 07:11:29,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:29,101 INFO L276 IsEmpty]: Start isEmpty. Operand 8849 states and 37068 transitions. [2021-06-05 07:11:29,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 07:11:29,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:29,123 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:29,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 07:11:29,337 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:29,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:29,337 INFO L82 PathProgramCache]: Analyzing trace with hash 291561130, now seen corresponding path program 5 times [2021-06-05 07:11:29,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:29,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418538757] [2021-06-05 07:11:29,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:29,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:11:29,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:29,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418538757] [2021-06-05 07:11:29,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418538757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:29,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075514401] [2021-06-05 07:11:29,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:29,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:11:29,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:29,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 07:11:29,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:29,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:11:29,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075514401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:29,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:29,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-06-05 07:11:29,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572657953] [2021-06-05 07:11:29,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:11:29,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:29,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:11:29,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:11:29,708 INFO L87 Difference]: Start difference. First operand 8849 states and 37068 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) [2021-06-05 07:11:30,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:30,122 INFO L93 Difference]: Finished difference Result 24527 states and 98100 transitions. [2021-06-05 07:11:30,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:11:30,122 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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 31 [2021-06-05 07:11:30,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:30,274 INFO L225 Difference]: With dead ends: 24527 [2021-06-05 07:11:30,275 INFO L226 Difference]: Without dead ends: 24223 [2021-06-05 07:11:30,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 189.2ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:11:30,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24223 states. [2021-06-05 07:11:30,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24223 to 12684. [2021-06-05 07:11:30,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12684 states, 12683 states have (on average 4.337932665773082) internal successors, (55018), 12683 states have internal predecessors, (55018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:30,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12684 states to 12684 states and 55018 transitions. [2021-06-05 07:11:30,902 INFO L78 Accepts]: Start accepts. Automaton has 12684 states and 55018 transitions. Word has length 31 [2021-06-05 07:11:30,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:30,902 INFO L482 AbstractCegarLoop]: Abstraction has 12684 states and 55018 transitions. [2021-06-05 07:11:30,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) [2021-06-05 07:11:30,902 INFO L276 IsEmpty]: Start isEmpty. Operand 12684 states and 55018 transitions. [2021-06-05 07:11:31,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 07:11:31,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:31,037 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:31,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 07:11:31,252 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:31,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:31,252 INFO L82 PathProgramCache]: Analyzing trace with hash -166486102, now seen corresponding path program 6 times [2021-06-05 07:11:31,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:31,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493332726] [2021-06-05 07:11:31,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:31,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:31,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:31,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493332726] [2021-06-05 07:11:31,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493332726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:31,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361663016] [2021-06-05 07:11:31,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:31,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:11:31,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:31,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:11:31,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:31,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:11:31,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361663016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:31,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:31,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-06-05 07:11:31,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862680294] [2021-06-05 07:11:31,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:11:31,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:31,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:11:31,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:11:31,453 INFO L87 Difference]: Start difference. First operand 12684 states and 55018 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-06-05 07:11:32,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:32,365 INFO L93 Difference]: Finished difference Result 61524 states and 263492 transitions. [2021-06-05 07:11:32,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:11:32,366 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 31 [2021-06-05 07:11:32,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:32,566 INFO L225 Difference]: With dead ends: 61524 [2021-06-05 07:11:32,566 INFO L226 Difference]: Without dead ends: 60380 [2021-06-05 07:11:32,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 318.2ms TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:11:32,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60380 states. [2021-06-05 07:11:34,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60380 to 33143. [2021-06-05 07:11:34,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33143 states, 33142 states have (on average 4.745911532194798) internal successors, (157289), 33142 states have internal predecessors, (157289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:34,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33143 states to 33143 states and 157289 transitions. [2021-06-05 07:11:34,337 INFO L78 Accepts]: Start accepts. Automaton has 33143 states and 157289 transitions. Word has length 31 [2021-06-05 07:11:34,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:34,337 INFO L482 AbstractCegarLoop]: Abstraction has 33143 states and 157289 transitions. [2021-06-05 07:11:34,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-06-05 07:11:34,338 INFO L276 IsEmpty]: Start isEmpty. Operand 33143 states and 157289 transitions. [2021-06-05 07:11:34,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 07:11:34,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:34,418 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:34,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:34,619 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:34,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:34,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1888374044, now seen corresponding path program 7 times [2021-06-05 07:11:34,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:34,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605295557] [2021-06-05 07:11:34,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:34,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:34,674 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:11:34,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:34,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605295557] [2021-06-05 07:11:34,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605295557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:34,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75445393] [2021-06-05 07:11:34,674 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 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 [2021-06-05 07:11:34,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:34,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:11:34,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:34,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:11:34,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75445393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:34,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:34,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 07:11:34,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767780406] [2021-06-05 07:11:34,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:11:34,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:34,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:11:34,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:11:34,803 INFO L87 Difference]: Start difference. First operand 33143 states and 157289 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-06-05 07:11:35,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:35,323 INFO L93 Difference]: Finished difference Result 44403 states and 202376 transitions. [2021-06-05 07:11:35,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:11:35,325 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 31 [2021-06-05 07:11:35,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:35,466 INFO L225 Difference]: With dead ends: 44403 [2021-06-05 07:11:35,466 INFO L226 Difference]: Without dead ends: 44271 [2021-06-05 07:11:35,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:11:35,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44271 states. [2021-06-05 07:11:36,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44271 to 33850. [2021-06-05 07:11:36,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33850 states, 33849 states have (on average 4.7301249667641585) internal successors, (160110), 33849 states have internal predecessors, (160110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:36,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33850 states to 33850 states and 160110 transitions. [2021-06-05 07:11:36,678 INFO L78 Accepts]: Start accepts. Automaton has 33850 states and 160110 transitions. Word has length 31 [2021-06-05 07:11:36,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:36,678 INFO L482 AbstractCegarLoop]: Abstraction has 33850 states and 160110 transitions. [2021-06-05 07:11:36,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-06-05 07:11:36,678 INFO L276 IsEmpty]: Start isEmpty. Operand 33850 states and 160110 transitions. [2021-06-05 07:11:36,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 07:11:36,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:36,772 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:36,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:36,994 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:36,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:36,994 INFO L82 PathProgramCache]: Analyzing trace with hash -704126048, now seen corresponding path program 8 times [2021-06-05 07:11:36,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:36,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777287110] [2021-06-05 07:11:36,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:37,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:37,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777287110] [2021-06-05 07:11:37,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777287110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:37,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381779622] [2021-06-05 07:11:37,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 07:11:37,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:11:37,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:37,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 07:11:37,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:37,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:37,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381779622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:37,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:37,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 07:11:37,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263871204] [2021-06-05 07:11:37,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:11:37,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:37,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:11:37,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:11:37,240 INFO L87 Difference]: Start difference. First operand 33850 states and 160110 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 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) [2021-06-05 07:11:38,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:38,584 INFO L93 Difference]: Finished difference Result 66403 states and 284462 transitions. [2021-06-05 07:11:38,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:11:38,585 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 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 31 [2021-06-05 07:11:38,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:38,811 INFO L225 Difference]: With dead ends: 66403 [2021-06-05 07:11:38,811 INFO L226 Difference]: Without dead ends: 64922 [2021-06-05 07:11:38,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 520.7ms TimeCoverageRelationStatistics Valid=386, Invalid=1174, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 07:11:38,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64922 states. [2021-06-05 07:11:39,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64922 to 32872. [2021-06-05 07:11:39,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32872 states, 32871 states have (on average 4.6574183931124695) internal successors, (153094), 32871 states have internal predecessors, (153094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:39,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32872 states to 32872 states and 153094 transitions. [2021-06-05 07:11:39,948 INFO L78 Accepts]: Start accepts. Automaton has 32872 states and 153094 transitions. Word has length 31 [2021-06-05 07:11:39,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:39,948 INFO L482 AbstractCegarLoop]: Abstraction has 32872 states and 153094 transitions. [2021-06-05 07:11:39,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 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) [2021-06-05 07:11:39,948 INFO L276 IsEmpty]: Start isEmpty. Operand 32872 states and 153094 transitions. [2021-06-05 07:11:40,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 07:11:40,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:40,016 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:40,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 07:11:40,218 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:40,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:40,218 INFO L82 PathProgramCache]: Analyzing trace with hash 101455272, now seen corresponding path program 9 times [2021-06-05 07:11:40,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:40,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136258646] [2021-06-05 07:11:40,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:40,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:40,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:40,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:40,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136258646] [2021-06-05 07:11:40,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136258646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:40,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411616745] [2021-06-05 07:11:40,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:40,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:11:40,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:40,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 07:11:40,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:40,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:11:40,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411616745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:40,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:40,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 07:11:40,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144740328] [2021-06-05 07:11:40,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:11:40,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:40,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:11:40,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:11:40,403 INFO L87 Difference]: Start difference. First operand 32872 states and 153094 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:41,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:41,597 INFO L93 Difference]: Finished difference Result 67837 states and 295603 transitions. [2021-06-05 07:11:41,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:11:41,597 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 07:11:41,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:41,788 INFO L225 Difference]: With dead ends: 67837 [2021-06-05 07:11:41,788 INFO L226 Difference]: Without dead ends: 67411 [2021-06-05 07:11:41,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 435.9ms TimeCoverageRelationStatistics Valid=253, Invalid=869, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 07:11:42,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67411 states. [2021-06-05 07:11:43,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67411 to 32800. [2021-06-05 07:11:43,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32800 states, 32799 states have (on average 4.647367297783469) internal successors, (152429), 32799 states have internal predecessors, (152429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:43,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32800 states to 32800 states and 152429 transitions. [2021-06-05 07:11:43,448 INFO L78 Accepts]: Start accepts. Automaton has 32800 states and 152429 transitions. Word has length 31 [2021-06-05 07:11:43,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:43,448 INFO L482 AbstractCegarLoop]: Abstraction has 32800 states and 152429 transitions. [2021-06-05 07:11:43,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:43,448 INFO L276 IsEmpty]: Start isEmpty. Operand 32800 states and 152429 transitions. [2021-06-05 07:11:43,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 07:11:43,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:43,521 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:43,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:43,721 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:43,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:43,722 INFO L82 PathProgramCache]: Analyzing trace with hash 903160218, now seen corresponding path program 10 times [2021-06-05 07:11:43,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:43,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002257487] [2021-06-05 07:11:43,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:43,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:43,795 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:11:43,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:43,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002257487] [2021-06-05 07:11:43,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002257487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:43,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156684744] [2021-06-05 07:11:43,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:43,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:11:43,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:43,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 07:11:43,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:43,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 07:11:43,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156684744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:43,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:43,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 07:11:43,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741451560] [2021-06-05 07:11:43,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:11:43,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:43,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:11:43,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:11:43,911 INFO L87 Difference]: Start difference. First operand 32800 states and 152429 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-06-05 07:11:44,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:44,292 INFO L93 Difference]: Finished difference Result 54540 states and 247085 transitions. [2021-06-05 07:11:44,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:11:44,292 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 33 [2021-06-05 07:11:44,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:44,467 INFO L225 Difference]: With dead ends: 54540 [2021-06-05 07:11:44,468 INFO L226 Difference]: Without dead ends: 54365 [2021-06-05 07:11:44,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:11:44,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54365 states. [2021-06-05 07:11:45,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54365 to 44066. [2021-06-05 07:11:45,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44066 states, 44065 states have (on average 4.725019857029388) internal successors, (208208), 44065 states have internal predecessors, (208208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:46,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44066 states to 44066 states and 208208 transitions. [2021-06-05 07:11:46,184 INFO L78 Accepts]: Start accepts. Automaton has 44066 states and 208208 transitions. Word has length 33 [2021-06-05 07:11:46,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:46,184 INFO L482 AbstractCegarLoop]: Abstraction has 44066 states and 208208 transitions. [2021-06-05 07:11:46,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-06-05 07:11:46,184 INFO L276 IsEmpty]: Start isEmpty. Operand 44066 states and 208208 transitions. [2021-06-05 07:11:46,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 07:11:46,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:46,295 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:46,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 07:11:46,505 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:46,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:46,505 INFO L82 PathProgramCache]: Analyzing trace with hash 108399622, now seen corresponding path program 11 times [2021-06-05 07:11:46,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:46,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156542856] [2021-06-05 07:11:46,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:46,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:46,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:11:46,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:46,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156542856] [2021-06-05 07:11:46,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156542856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:46,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907518244] [2021-06-05 07:11:46,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:46,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:11:46,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:46,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 07:11:46,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:46,686 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 07:11:46,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907518244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:46,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:46,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 07:11:46,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613703080] [2021-06-05 07:11:46,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:11:46,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:46,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:11:46,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:11:46,687 INFO L87 Difference]: Start difference. First operand 44066 states and 208208 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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) [2021-06-05 07:11:47,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:47,066 INFO L93 Difference]: Finished difference Result 55576 states and 253213 transitions. [2021-06-05 07:11:47,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:11:47,067 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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 33 [2021-06-05 07:11:47,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:47,252 INFO L225 Difference]: With dead ends: 55576 [2021-06-05 07:11:47,252 INFO L226 Difference]: Without dead ends: 55382 [2021-06-05 07:11:47,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:11:47,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55382 states. [2021-06-05 07:11:48,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55382 to 44604. [2021-06-05 07:11:48,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44604 states, 44603 states have (on average 4.71378606820169) internal successors, (210249), 44603 states have internal predecessors, (210249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:48,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44604 states to 44604 states and 210249 transitions. [2021-06-05 07:11:48,795 INFO L78 Accepts]: Start accepts. Automaton has 44604 states and 210249 transitions. Word has length 33 [2021-06-05 07:11:48,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:48,796 INFO L482 AbstractCegarLoop]: Abstraction has 44604 states and 210249 transitions. [2021-06-05 07:11:48,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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) [2021-06-05 07:11:48,796 INFO L276 IsEmpty]: Start isEmpty. Operand 44604 states and 210249 transitions. [2021-06-05 07:11:49,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 07:11:49,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:49,307 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:49,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:49,508 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:49,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:49,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1275302974, now seen corresponding path program 12 times [2021-06-05 07:11:49,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:49,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565183814] [2021-06-05 07:11:49,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:11:49,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:49,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565183814] [2021-06-05 07:11:49,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565183814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:49,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452857176] [2021-06-05 07:11:49,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:49,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 07:11:49,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:49,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:11:49,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:49,691 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:11:49,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452857176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:49,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:49,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 07:11:49,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312390310] [2021-06-05 07:11:49,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:11:49,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:49,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:11:49,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:11:49,693 INFO L87 Difference]: Start difference. First operand 44604 states and 210249 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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) [2021-06-05 07:11:51,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:51,522 INFO L93 Difference]: Finished difference Result 141398 states and 642861 transitions. [2021-06-05 07:11:51,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:11:51,523 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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 33 [2021-06-05 07:11:51,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:52,100 INFO L225 Difference]: With dead ends: 141398 [2021-06-05 07:11:52,101 INFO L226 Difference]: Without dead ends: 140699 [2021-06-05 07:11:52,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 379.7ms TimeCoverageRelationStatistics Valid=312, Invalid=1020, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:11:52,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140699 states. [2021-06-05 07:11:54,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140699 to 85571. [2021-06-05 07:11:55,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85571 states, 85570 states have (on average 4.762369989482295) internal successors, (407516), 85570 states have internal predecessors, (407516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:55,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85571 states to 85571 states and 407516 transitions. [2021-06-05 07:11:55,948 INFO L78 Accepts]: Start accepts. Automaton has 85571 states and 407516 transitions. Word has length 33 [2021-06-05 07:11:55,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:55,948 INFO L482 AbstractCegarLoop]: Abstraction has 85571 states and 407516 transitions. [2021-06-05 07:11:55,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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) [2021-06-05 07:11:55,948 INFO L276 IsEmpty]: Start isEmpty. Operand 85571 states and 407516 transitions. [2021-06-05 07:11:56,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:11:56,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:56,228 INFO L521 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, 1] [2021-06-05 07:11:56,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 07:11:56,429 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:56,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:56,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1471051102, now seen corresponding path program 13 times [2021-06-05 07:11:56,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:56,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049526997] [2021-06-05 07:11:56,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:56,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:56,519 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 07:11:56,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:56,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049526997] [2021-06-05 07:11:56,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049526997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:56,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896128747] [2021-06-05 07:11:56,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:56,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:56,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:11:56,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:56,643 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:11:56,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896128747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:56,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:56,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-06-05 07:11:56,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546940041] [2021-06-05 07:11:56,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:11:56,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:56,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:11:56,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:11:56,644 INFO L87 Difference]: Start difference. First operand 85571 states and 407516 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:58,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:58,815 INFO L93 Difference]: Finished difference Result 205700 states and 956596 transitions. [2021-06-05 07:11:58,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:11:58,816 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:11:58,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:00,150 INFO L225 Difference]: With dead ends: 205700 [2021-06-05 07:12:00,150 INFO L226 Difference]: Without dead ends: 204198 [2021-06-05 07:12:00,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 229.9ms TimeCoverageRelationStatistics Valid=252, Invalid=678, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:12:00,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204198 states. [2021-06-05 07:12:04,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204198 to 179419. [2021-06-05 07:12:05,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179419 states, 179418 states have (on average 4.730361502190416) internal successors, (848712), 179418 states have internal predecessors, (848712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:06,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179419 states to 179419 states and 848712 transitions. [2021-06-05 07:12:06,954 INFO L78 Accepts]: Start accepts. Automaton has 179419 states and 848712 transitions. Word has length 35 [2021-06-05 07:12:06,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:06,954 INFO L482 AbstractCegarLoop]: Abstraction has 179419 states and 848712 transitions. [2021-06-05 07:12:06,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:06,954 INFO L276 IsEmpty]: Start isEmpty. Operand 179419 states and 848712 transitions. [2021-06-05 07:12:07,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:12:07,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:07,492 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:07,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 07:12:07,692 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:07,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:07,692 INFO L82 PathProgramCache]: Analyzing trace with hash -233402852, now seen corresponding path program 14 times [2021-06-05 07:12:07,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:07,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96882034] [2021-06-05 07:12:07,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:07,743 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:12:07,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:07,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96882034] [2021-06-05 07:12:07,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96882034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:07,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113560089] [2021-06-05 07:12:07,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:07,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:12:07,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:07,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 07:12:07,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:07,869 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 07:12:07,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113560089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:07,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:07,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 07:12:07,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82924470] [2021-06-05 07:12:07,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:12:07,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:07,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:12:07,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:12:07,870 INFO L87 Difference]: Start difference. First operand 179419 states and 848712 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:12,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:12,070 INFO L93 Difference]: Finished difference Result 389060 states and 1801255 transitions. [2021-06-05 07:12:12,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 07:12:12,070 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:12:12,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:14,705 INFO L225 Difference]: With dead ends: 389060 [2021-06-05 07:12:14,706 INFO L226 Difference]: Without dead ends: 387773 [2021-06-05 07:12:14,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 321.6ms TimeCoverageRelationStatistics Valid=314, Invalid=1246, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 07:12:15,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387773 states. [2021-06-05 07:12:24,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387773 to 285677. [2021-06-05 07:12:24,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285677 states, 285676 states have (on average 4.812798414987609) internal successors, (1374901), 285676 states have internal predecessors, (1374901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:26,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285677 states to 285677 states and 1374901 transitions. [2021-06-05 07:12:26,919 INFO L78 Accepts]: Start accepts. Automaton has 285677 states and 1374901 transitions. Word has length 35 [2021-06-05 07:12:26,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:26,919 INFO L482 AbstractCegarLoop]: Abstraction has 285677 states and 1374901 transitions. [2021-06-05 07:12:26,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:26,919 INFO L276 IsEmpty]: Start isEmpty. Operand 285677 states and 1374901 transitions. [2021-06-05 07:12:27,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:12:27,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:27,771 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:27,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 07:12:27,971 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:27,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:27,972 INFO L82 PathProgramCache]: Analyzing trace with hash 828413272, now seen corresponding path program 15 times [2021-06-05 07:12:27,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:27,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37620215] [2021-06-05 07:12:27,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:28,028 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:12:28,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:28,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37620215] [2021-06-05 07:12:28,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37620215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:28,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435290692] [2021-06-05 07:12:28,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:28,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:12:28,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:28,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:12:28,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:28,172 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 07:12:28,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435290692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:28,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:28,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 07:12:28,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281964563] [2021-06-05 07:12:28,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:12:28,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:28,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:12:28,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:12:28,173 INFO L87 Difference]: Start difference. First operand 285677 states and 1374901 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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) [2021-06-05 07:12:42,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:42,157 INFO L93 Difference]: Finished difference Result 1050714 states and 4955717 transitions. [2021-06-05 07:12:42,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 07:12:42,158 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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 35 [2021-06-05 07:12:42,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:53,179 INFO L225 Difference]: With dead ends: 1050714 [2021-06-05 07:12:53,179 INFO L226 Difference]: Without dead ends: 1048522 [2021-06-05 07:12:53,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 591.5ms TimeCoverageRelationStatistics Valid=618, Invalid=2352, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 07:12:55,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048522 states. [2021-06-05 07:13:22,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048522 to 706654. [2021-06-05 07:13:24,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706654 states, 706653 states have (on average 4.956557178700154) internal successors, (3502566), 706653 states have internal predecessors, (3502566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:31,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706654 states to 706654 states and 3502566 transitions. [2021-06-05 07:13:31,832 INFO L78 Accepts]: Start accepts. Automaton has 706654 states and 3502566 transitions. Word has length 35 [2021-06-05 07:13:31,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:31,832 INFO L482 AbstractCegarLoop]: Abstraction has 706654 states and 3502566 transitions. [2021-06-05 07:13:31,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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) [2021-06-05 07:13:31,832 INFO L276 IsEmpty]: Start isEmpty. Operand 706654 states and 3502566 transitions. [2021-06-05 07:13:34,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:13:34,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:34,007 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:13:34,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 07:13:34,213 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:34,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:34,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1638836116, now seen corresponding path program 16 times [2021-06-05 07:13:34,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:34,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921216194] [2021-06-05 07:13:34,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:34,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:34,293 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:13:34,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:34,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921216194] [2021-06-05 07:13:34,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921216194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:34,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360143983] [2021-06-05 07:13:34,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:34,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:13:34,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:34,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 07:13:34,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:35,233 WARN L205 SmtUtils]: Spent 849.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 07:13:35,273 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 07:13:35,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360143983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:35,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:35,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 07:13:35,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087055534] [2021-06-05 07:13:35,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:13:35,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:35,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:13:35,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:13:35,275 INFO L87 Difference]: Start difference. First operand 706654 states and 3502566 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 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) [2021-06-05 07:13:49,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:49,747 INFO L93 Difference]: Finished difference Result 955483 states and 4512570 transitions. [2021-06-05 07:13:49,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 07:13:49,747 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 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 35 [2021-06-05 07:13:49,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:59,329 INFO L225 Difference]: With dead ends: 955483 [2021-06-05 07:13:59,329 INFO L226 Difference]: Without dead ends: 947993 [2021-06-05 07:13:59,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 428.0ms TimeCoverageRelationStatistics Valid=387, Invalid=1593, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:14:00,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947993 states. [2021-06-05 07:14:25,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947993 to 704846. [2021-06-05 07:14:27,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704846 states, 704845 states have (on average 4.933249154069334) internal successors, (3477176), 704845 states have internal predecessors, (3477176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:37,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704846 states to 704846 states and 3477176 transitions. [2021-06-05 07:14:37,595 INFO L78 Accepts]: Start accepts. Automaton has 704846 states and 3477176 transitions. Word has length 35 [2021-06-05 07:14:37,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:14:37,595 INFO L482 AbstractCegarLoop]: Abstraction has 704846 states and 3477176 transitions. [2021-06-05 07:14:37,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 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) [2021-06-05 07:14:37,596 INFO L276 IsEmpty]: Start isEmpty. Operand 704846 states and 3477176 transitions. [2021-06-05 07:14:42,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:14:42,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:14:42,427 INFO L521 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, 1] [2021-06-05 07:14:42,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 07:14:42,627 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:14:42,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:14:42,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1825465252, now seen corresponding path program 17 times [2021-06-05 07:14:42,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:14:42,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353347331] [2021-06-05 07:14:42,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:14:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:42,702 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 07:14:42,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:14:42,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353347331] [2021-06-05 07:14:42,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353347331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:42,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388246666] [2021-06-05 07:14:42,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:14:42,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:14:42,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:14:42,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 07:14:42,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:14:42,907 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 07:14:42,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388246666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:42,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:14:42,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 07:14:42,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717817607] [2021-06-05 07:14:42,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:14:42,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:14:42,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:14:42,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:14:42,909 INFO L87 Difference]: Start difference. First operand 704846 states and 3477176 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 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)