/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-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 17:13:48,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 17:13:48,272 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 17:13:48,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 17:13:48,336 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-03 17:13:48,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-03 17:13:48,341 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-03 17:13:48,342 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-03 17:13:48,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-03 17:13:48,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-03 17:13:48,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-03 17:13:48,355 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-03 17:13:48,356 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-03 17:13:48,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-03 17:13:48,359 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-03 17:13:48,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-03 17:13:48,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-03 17:13:48,371 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-03 17:13:48,371 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-03 17:13:48,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-03 17:13:48,372 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-03 17:13:48,373 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-03 17:13:48,374 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-03 17:13:48,374 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-03 17:13:48,374 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-03 17:13:48,375 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 17:13:48,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 17:13:48,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 17:13:48,386 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 [2021-05-03 17:13:48,431 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 17:13:48,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 17:13:48,432 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 17:13:48,432 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 17:13:48,433 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 17:13:48,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 17:13:48,433 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 17:13:48,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 17:13:48,434 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 17:13:48,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 17:13:48,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 17:13:48,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 17:13:48,434 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 17:13:48,434 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 17:13:48,434 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 17:13:48,434 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 17:13:48,435 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 17:13:48,435 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 17:13:48,435 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 17:13:48,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 17:13:48,435 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 17:13:48,435 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 17:13:48,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 17:13:48,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 17:13:48,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 17:13:48,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 17:13:48,436 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 17:13:48,436 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 17:13:48,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 17:13:48,436 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 17:13:48,436 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 17:13:48,436 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 17:13:48,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 17:13:48,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 17:13:48,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 17:13:48,802 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 17:13:48,804 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 17:13:48,805 INFO L432 ainManager$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 [2021-05-03 17:13:48,806 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' [2021-05-03 17:13:48,845 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 17:13:48,847 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 17:13:48,848 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 17:13:48,849 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 17:13:48,849 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 17:13:48,859 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 03.05 05:13:48" (1/1) ... [2021-05-03 17:13:48,865 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 03.05 05:13:48" (1/1) ... [2021-05-03 17:13:48,876 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 17:13:48,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 17:13:48,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 17:13:48,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 17:13:48,886 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 03.05 05:13:48" (1/1) ... [2021-05-03 17:13:48,886 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 03.05 05:13:48" (1/1) ... [2021-05-03 17:13:48,887 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 03.05 05:13:48" (1/1) ... [2021-05-03 17:13:48,887 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 03.05 05:13:48" (1/1) ... [2021-05-03 17:13:48,890 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 03.05 05:13:48" (1/1) ... [2021-05-03 17:13:48,893 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 03.05 05:13:48" (1/1) ... [2021-05-03 17:13:48,895 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 03.05 05:13:48" (1/1) ... [2021-05-03 17:13:48,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 17:13:48,901 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 17:13:48,902 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 17:13:48,902 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 17:13:48,904 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 03.05 05:13:48" (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 [2021-05-03 17:13:48,973 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 17:13:48,974 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 17:13:48,974 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 17:13:48,974 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 17:13:48,975 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 17:13:48,975 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 17:13:48,975 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 17:13:48,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 17:13:48,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 17:13:48,976 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-03 17:13:48,976 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-03 17:13:48,976 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-03 17:13:48,976 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-05-03 17:13:48,976 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-05-03 17:13:48,976 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-05-03 17:13:48,977 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 17:13:49,272 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 17:13:49,272 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-03 17:13:49,274 INFO L202 PluginConnector]: Adding new model counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 05:13:49 BoogieIcfgContainer [2021-05-03 17:13:49,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 17:13:49,276 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 17:13:49,276 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 17:13:49,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 17:13:49,279 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 03.05 05:13:48" (1/2) ... [2021-05-03 17:13:49,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55b75de7 and model type counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 05:13:49, skipping insertion in model container [2021-05-03 17:13:49,280 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 03.05 05:13:49" (2/2) ... [2021-05-03 17:13:49,282 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-add-4-semi-Q67.wvr.bpl [2021-05-03 17:13:49,287 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 17:13:49,287 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 17:13:49,291 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 17:13:49,292 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 17:13:49,381 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-05-03 17:13:49,397 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-05-03 17:13:49,416 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 17:13:49,416 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 17:13:49,416 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 17:13:49,416 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 17:13:49,416 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 17:13:49,416 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 17:13:49,416 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 17:13:49,417 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 17:13:49,429 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-05-03 17:13:49,506 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) [2021-05-03 17:13:49,511 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) [2021-05-03 17:13:49,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 17:13:49,538 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:13:49,539 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:13:49,540 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:13:49,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:13:49,550 INFO L82 PathProgramCache]: Analyzing trace with hash -163076712, now seen corresponding path program 1 times [2021-05-03 17:13:49,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:13:49,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614357967] [2021-05-03 17:13:49,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:13:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:13:49,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614357967] [2021-05-03 17:13:49,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:13:49,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 17:13:49,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73672783] [2021-05-03 17:13:49,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 17:13:49,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:13:49,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 17:13:49,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 17:13:49,805 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) [2021-05-03 17:13:49,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:13:49,893 INFO L93 Difference]: Finished difference Result 856 states and 3119 transitions. [2021-05-03 17:13:49,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 17:13:49,895 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 [2021-05-03 17:13:49,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:13:49,924 INFO L225 Difference]: With dead ends: 856 [2021-05-03 17:13:49,924 INFO L226 Difference]: Without dead ends: 731 [2021-05-03 17:13:49,925 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 17:13:49,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-05-03 17:13:50,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 697. [2021-05-03 17:13:50,046 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) [2021-05-03 17:13:50,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 2592 transitions. [2021-05-03 17:13:50,054 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 2592 transitions. Word has length 21 [2021-05-03 17:13:50,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:13:50,058 INFO L480 AbstractCegarLoop]: Abstraction has 697 states and 2592 transitions. [2021-05-03 17:13:50,058 INFO L481 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) [2021-05-03 17:13:50,058 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 2592 transitions. [2021-05-03 17:13:50,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:13:50,063 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:13:50,064 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:13:50,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 17:13:50,065 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:13:50,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:13:50,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1142310058, now seen corresponding path program 1 times [2021-05-03 17:13:50,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:13:50,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146339116] [2021-05-03 17:13:50,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:13:50,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:50,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:13:50,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146339116] [2021-05-03 17:13:50,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217115985] [2021-05-03 17:13:50,188 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 [2021-05-03 17:13:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:50,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 17:13:50,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:13:50,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:13:50,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:13:50,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-05-03 17:13:50,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64314633] [2021-05-03 17:13:50,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 17:13:50,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:13:50,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 17:13:50,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:13:50,402 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) [2021-05-03 17:13:50,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:13:50,537 INFO L93 Difference]: Finished difference Result 1527 states and 5658 transitions. [2021-05-03 17:13:50,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 17:13:50,538 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 [2021-05-03 17:13:50,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:13:50,551 INFO L225 Difference]: With dead ends: 1527 [2021-05-03 17:13:50,552 INFO L226 Difference]: Without dead ends: 1527 [2021-05-03 17:13:50,553 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:13:50,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2021-05-03 17:13:50,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 837. [2021-05-03 17:13:50,641 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) [2021-05-03 17:13:50,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 3156 transitions. [2021-05-03 17:13:50,659 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 3156 transitions. Word has length 23 [2021-05-03 17:13:50,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:13:50,660 INFO L480 AbstractCegarLoop]: Abstraction has 837 states and 3156 transitions. [2021-05-03 17:13:50,660 INFO L481 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) [2021-05-03 17:13:50,660 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 3156 transitions. [2021-05-03 17:13:50,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:13:50,665 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:13:50,665 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:13:50,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-03 17:13:50,881 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:13:50,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:13:50,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1324630694, now seen corresponding path program 1 times [2021-05-03 17:13:50,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:13:50,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170754720] [2021-05-03 17:13:50,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:13:50,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:50,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:13:50,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170754720] [2021-05-03 17:13:50,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:13:50,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 17:13:50,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232260055] [2021-05-03 17:13:50,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 17:13:50,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:13:50,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 17:13:50,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:13:50,973 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) [2021-05-03 17:13:51,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:13:51,070 INFO L93 Difference]: Finished difference Result 1186 states and 4244 transitions. [2021-05-03 17:13:51,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 17:13:51,071 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 [2021-05-03 17:13:51,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:13:51,081 INFO L225 Difference]: With dead ends: 1186 [2021-05-03 17:13:51,082 INFO L226 Difference]: Without dead ends: 1076 [2021-05-03 17:13:51,088 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 17:13:51,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2021-05-03 17:13:51,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 805. [2021-05-03 17:13:51,128 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) [2021-05-03 17:13:51,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 3054 transitions. [2021-05-03 17:13:51,136 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 3054 transitions. Word has length 23 [2021-05-03 17:13:51,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:13:51,137 INFO L480 AbstractCegarLoop]: Abstraction has 805 states and 3054 transitions. [2021-05-03 17:13:51,137 INFO L481 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) [2021-05-03 17:13:51,137 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 3054 transitions. [2021-05-03 17:13:51,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:13:51,141 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:13:51,142 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:13:51,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 17:13:51,142 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:13:51,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:13:51,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1971805834, now seen corresponding path program 2 times [2021-05-03 17:13:51,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:13:51,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364043268] [2021-05-03 17:13:51,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:13:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:51,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:13:51,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364043268] [2021-05-03 17:13:51,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:13:51,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 17:13:51,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120887057] [2021-05-03 17:13:51,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 17:13:51,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:13:51,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 17:13:51,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-03 17:13:51,194 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) [2021-05-03 17:13:51,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:13:51,237 INFO L93 Difference]: Finished difference Result 1022 states and 3745 transitions. [2021-05-03 17:13:51,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 17:13:51,238 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 [2021-05-03 17:13:51,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:13:51,246 INFO L225 Difference]: With dead ends: 1022 [2021-05-03 17:13:51,247 INFO L226 Difference]: Without dead ends: 1022 [2021-05-03 17:13:51,247 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:13:51,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2021-05-03 17:13:51,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 847. [2021-05-03 17:13:51,280 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) [2021-05-03 17:13:51,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 3174 transitions. [2021-05-03 17:13:51,286 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 3174 transitions. Word has length 23 [2021-05-03 17:13:51,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:13:51,286 INFO L480 AbstractCegarLoop]: Abstraction has 847 states and 3174 transitions. [2021-05-03 17:13:51,286 INFO L481 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) [2021-05-03 17:13:51,286 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 3174 transitions. [2021-05-03 17:13:51,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:13:51,290 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:13:51,290 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:13:51,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 17:13:51,290 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:13:51,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:13:51,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1776150594, now seen corresponding path program 2 times [2021-05-03 17:13:51,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:13:51,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167073446] [2021-05-03 17:13:51,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:13:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:13:51,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167073446] [2021-05-03 17:13:51,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:13:51,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 17:13:51,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201930766] [2021-05-03 17:13:51,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 17:13:51,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:13:51,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 17:13:51,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:13:51,414 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) [2021-05-03 17:13:51,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:13:51,485 INFO L93 Difference]: Finished difference Result 1324 states and 4824 transitions. [2021-05-03 17:13:51,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 17:13:51,486 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 [2021-05-03 17:13:51,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:13:51,496 INFO L225 Difference]: With dead ends: 1324 [2021-05-03 17:13:51,496 INFO L226 Difference]: Without dead ends: 1288 [2021-05-03 17:13:51,497 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 17:13:51,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-05-03 17:13:51,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 893. [2021-05-03 17:13:51,539 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) [2021-05-03 17:13:51,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3335 transitions. [2021-05-03 17:13:51,546 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3335 transitions. Word has length 23 [2021-05-03 17:13:51,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:13:51,546 INFO L480 AbstractCegarLoop]: Abstraction has 893 states and 3335 transitions. [2021-05-03 17:13:51,546 INFO L481 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) [2021-05-03 17:13:51,547 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3335 transitions. [2021-05-03 17:13:51,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:13:51,551 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:13:51,551 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:13:51,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-03 17:13:51,551 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:13:51,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:13:51,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1017455134, now seen corresponding path program 3 times [2021-05-03 17:13:51,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:13:51,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493569902] [2021-05-03 17:13:51,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:13:51,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:13:51,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493569902] [2021-05-03 17:13:51,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:13:51,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 17:13:51,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845833321] [2021-05-03 17:13:51,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 17:13:51,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:13:51,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 17:13:51,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-03 17:13:51,587 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) [2021-05-03 17:13:51,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:13:51,635 INFO L93 Difference]: Finished difference Result 1414 states and 5206 transitions. [2021-05-03 17:13:51,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 17:13:51,636 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 [2021-05-03 17:13:51,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:13:51,647 INFO L225 Difference]: With dead ends: 1414 [2021-05-03 17:13:51,648 INFO L226 Difference]: Without dead ends: 1392 [2021-05-03 17:13:51,648 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:13:51,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2021-05-03 17:13:51,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1109. [2021-05-03 17:13:51,693 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) [2021-05-03 17:13:51,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 4226 transitions. [2021-05-03 17:13:51,701 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 4226 transitions. Word has length 23 [2021-05-03 17:13:51,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:13:51,702 INFO L480 AbstractCegarLoop]: Abstraction has 1109 states and 4226 transitions. [2021-05-03 17:13:51,702 INFO L481 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) [2021-05-03 17:13:51,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 4226 transitions. [2021-05-03 17:13:51,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:13:51,707 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:13:51,707 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:13:51,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-03 17:13:51,708 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:13:51,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:13:51,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1407416862, now seen corresponding path program 4 times [2021-05-03 17:13:51,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:13:51,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775025597] [2021-05-03 17:13:51,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:13:51,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:51,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:13:51,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775025597] [2021-05-03 17:13:51,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:13:51,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 17:13:51,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463463071] [2021-05-03 17:13:51,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 17:13:51,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:13:51,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 17:13:51,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:13:51,780 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) [2021-05-03 17:13:51,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:13:51,828 INFO L93 Difference]: Finished difference Result 1451 states and 5463 transitions. [2021-05-03 17:13:51,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 17:13:51,829 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 [2021-05-03 17:13:51,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:13:51,841 INFO L225 Difference]: With dead ends: 1451 [2021-05-03 17:13:51,841 INFO L226 Difference]: Without dead ends: 1451 [2021-05-03 17:13:51,841 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:13:51,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-05-03 17:13:51,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1131. [2021-05-03 17:13:51,888 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) [2021-05-03 17:13:51,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 4320 transitions. [2021-05-03 17:13:51,896 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 4320 transitions. Word has length 23 [2021-05-03 17:13:51,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:13:51,897 INFO L480 AbstractCegarLoop]: Abstraction has 1131 states and 4320 transitions. [2021-05-03 17:13:51,897 INFO L481 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) [2021-05-03 17:13:51,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 4320 transitions. [2021-05-03 17:13:51,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:13:51,905 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:13:51,905 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:13:51,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-03 17:13:51,905 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:13:51,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:13:51,906 INFO L82 PathProgramCache]: Analyzing trace with hash 832198006, now seen corresponding path program 1 times [2021-05-03 17:13:51,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:13:51,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901233570] [2021-05-03 17:13:51,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:13:51,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:52,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:13:52,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901233570] [2021-05-03 17:13:52,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147957224] [2021-05-03 17:13:52,026 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 [2021-05-03 17:13:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:52,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 17:13:52,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:13:52,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:13:52,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:13:52,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-05-03 17:13:52,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203663656] [2021-05-03 17:13:52,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 17:13:52,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:13:52,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 17:13:52,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:13:52,149 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) [2021-05-03 17:13:52,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:13:52,261 INFO L93 Difference]: Finished difference Result 1625 states and 6043 transitions. [2021-05-03 17:13:52,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 17:13:52,262 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 [2021-05-03 17:13:52,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:13:52,276 INFO L225 Difference]: With dead ends: 1625 [2021-05-03 17:13:52,276 INFO L226 Difference]: Without dead ends: 1546 [2021-05-03 17:13:52,277 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:13:52,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2021-05-03 17:13:52,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1118. [2021-05-03 17:13:52,325 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) [2021-05-03 17:13:52,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4266 transitions. [2021-05-03 17:13:52,332 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4266 transitions. Word has length 25 [2021-05-03 17:13:52,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:13:52,333 INFO L480 AbstractCegarLoop]: Abstraction has 1118 states and 4266 transitions. [2021-05-03 17:13:52,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:52,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4266 transitions. [2021-05-03 17:13:52,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:13:52,340 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:13:52,340 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:13:52,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:13:52,557 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:13:52,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:13:52,557 INFO L82 PathProgramCache]: Analyzing trace with hash 80621012, now seen corresponding path program 2 times [2021-05-03 17:13:52,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:13:52,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896825575] [2021-05-03 17:13:52,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:13:52,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:52,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:13:52,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896825575] [2021-05-03 17:13:52,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:13:52,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 17:13:52,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899503692] [2021-05-03 17:13:52,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 17:13:52,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:13:52,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 17:13:52,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-03 17:13:52,615 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) [2021-05-03 17:13:52,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:13:52,666 INFO L93 Difference]: Finished difference Result 1338 states and 5014 transitions. [2021-05-03 17:13:52,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 17:13:52,667 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 [2021-05-03 17:13:52,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:13:52,677 INFO L225 Difference]: With dead ends: 1338 [2021-05-03 17:13:52,677 INFO L226 Difference]: Without dead ends: 1338 [2021-05-03 17:13:52,677 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-03 17:13:52,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2021-05-03 17:13:52,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1133. [2021-05-03 17:13:52,714 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) [2021-05-03 17:13:52,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 4297 transitions. [2021-05-03 17:13:52,719 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 4297 transitions. Word has length 25 [2021-05-03 17:13:52,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:13:52,720 INFO L480 AbstractCegarLoop]: Abstraction has 1133 states and 4297 transitions. [2021-05-03 17:13:52,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:52,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 4297 transitions. [2021-05-03 17:13:52,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:13:52,724 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:13:52,724 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:13:52,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-03 17:13:52,724 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:13:52,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:13:52,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1880308832, now seen corresponding path program 1 times [2021-05-03 17:13:52,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:13:52,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787279702] [2021-05-03 17:13:52,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:13:52,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:52,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:13:52,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787279702] [2021-05-03 17:13:52,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186833391] [2021-05-03 17:13:52,776 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 [2021-05-03 17:13:52,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:52,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 17:13:52,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:13:52,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:13:52,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:13:52,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-05-03 17:13:52,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178828332] [2021-05-03 17:13:52,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 17:13:52,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:13:52,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 17:13:52,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:13:52,885 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) [2021-05-03 17:13:52,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:13:52,966 INFO L93 Difference]: Finished difference Result 1711 states and 6371 transitions. [2021-05-03 17:13:52,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 17:13:52,967 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 [2021-05-03 17:13:52,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:13:52,981 INFO L225 Difference]: With dead ends: 1711 [2021-05-03 17:13:52,981 INFO L226 Difference]: Without dead ends: 1659 [2021-05-03 17:13:52,982 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:13:52,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2021-05-03 17:13:53,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1105. [2021-05-03 17:13:53,025 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) [2021-05-03 17:13:53,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 4181 transitions. [2021-05-03 17:13:53,031 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 4181 transitions. Word has length 25 [2021-05-03 17:13:53,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:13:53,032 INFO L480 AbstractCegarLoop]: Abstraction has 1105 states and 4181 transitions. [2021-05-03 17:13:53,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:53,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 4181 transitions. [2021-05-03 17:13:53,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:13:53,036 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:13:53,037 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:13:53,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-03 17:13:53,264 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:13:53,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:13:53,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1955058084, now seen corresponding path program 3 times [2021-05-03 17:13:53,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:13:53,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430956619] [2021-05-03 17:13:53,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:13:53,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:53,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:13:53,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430956619] [2021-05-03 17:13:53,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:13:53,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 17:13:53,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926755938] [2021-05-03 17:13:53,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 17:13:53,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:13:53,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 17:13:53,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-03 17:13:53,302 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) [2021-05-03 17:13:53,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:13:53,351 INFO L93 Difference]: Finished difference Result 1111 states and 4195 transitions. [2021-05-03 17:13:53,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 17:13:53,352 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 [2021-05-03 17:13:53,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:13:53,357 INFO L225 Difference]: With dead ends: 1111 [2021-05-03 17:13:53,357 INFO L226 Difference]: Without dead ends: 946 [2021-05-03 17:13:53,358 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:13:53,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-05-03 17:13:53,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 858. [2021-05-03 17:13:53,384 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) [2021-05-03 17:13:53,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 3321 transitions. [2021-05-03 17:13:53,389 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 3321 transitions. Word has length 25 [2021-05-03 17:13:53,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:13:53,389 INFO L480 AbstractCegarLoop]: Abstraction has 858 states and 3321 transitions. [2021-05-03 17:13:53,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:53,390 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 3321 transitions. [2021-05-03 17:13:53,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:13:53,393 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:13:53,393 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:13:53,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-03 17:13:53,394 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:13:53,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:13:53,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1889596984, now seen corresponding path program 1 times [2021-05-03 17:13:53,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:13:53,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170747464] [2021-05-03 17:13:53,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:13:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:13:53,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170747464] [2021-05-03 17:13:53,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877616481] [2021-05-03 17:13:53,429 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 [2021-05-03 17:13:53,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:53,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 17:13:53,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:13:53,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:13:53,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:13:53,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-03 17:13:53,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490893329] [2021-05-03 17:13:53,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 17:13:53,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:13:53,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 17:13:53,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:13:53,535 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) [2021-05-03 17:13:53,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:13:53,605 INFO L93 Difference]: Finished difference Result 2765 states and 10475 transitions. [2021-05-03 17:13:53,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 17:13:53,605 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 [2021-05-03 17:13:53,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:13:53,618 INFO L225 Difference]: With dead ends: 2765 [2021-05-03 17:13:53,618 INFO L226 Difference]: Without dead ends: 2631 [2021-05-03 17:13:53,619 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-03 17:13:53,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2021-05-03 17:13:53,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 1964. [2021-05-03 17:13:53,687 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) [2021-05-03 17:13:53,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 7667 transitions. [2021-05-03 17:13:53,697 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 7667 transitions. Word has length 27 [2021-05-03 17:13:53,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:13:53,698 INFO L480 AbstractCegarLoop]: Abstraction has 1964 states and 7667 transitions. [2021-05-03 17:13:53,698 INFO L481 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) [2021-05-03 17:13:53,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 7667 transitions. [2021-05-03 17:13:53,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 17:13:53,705 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:13:53,705 INFO L551 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] [2021-05-03 17:13:53,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:13:53,921 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:13:53,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:13:53,921 INFO L82 PathProgramCache]: Analyzing trace with hash 444548470, now seen corresponding path program 2 times [2021-05-03 17:13:53,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:13:53,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390249832] [2021-05-03 17:13:53,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:13:53,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:54,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 17:13:54,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390249832] [2021-05-03 17:13:54,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805914213] [2021-05-03 17:13:54,013 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 [2021-05-03 17:13:54,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:13:54,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:13:54,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 17:13:54,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:13:54,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 17:13:54,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:13:54,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-05-03 17:13:54,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299868304] [2021-05-03 17:13:54,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 17:13:54,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:13:54,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 17:13:54,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:13:54,150 INFO L87 Difference]: Start difference. First operand 1964 states and 7667 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:54,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:13:54,266 INFO L93 Difference]: Finished difference Result 2660 states and 10383 transitions. [2021-05-03 17:13:54,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 17:13:54,267 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 17:13:54,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:13:54,278 INFO L225 Difference]: With dead ends: 2660 [2021-05-03 17:13:54,278 INFO L226 Difference]: Without dead ends: 2660 [2021-05-03 17:13:54,278 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 96.7ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:13:54,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2021-05-03 17:13:54,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 2137. [2021-05-03 17:13:54,335 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) [2021-05-03 17:13:54,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 8396 transitions. [2021-05-03 17:13:54,347 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 8396 transitions. Word has length 29 [2021-05-03 17:13:54,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:13:54,347 INFO L480 AbstractCegarLoop]: Abstraction has 2137 states and 8396 transitions. [2021-05-03 17:13:54,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:54,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 8396 transitions. [2021-05-03 17:13:54,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 17:13:54,355 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:13:54,355 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:13:54,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-03 17:13:54,569 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:13:54,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:13:54,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1645018294, now seen corresponding path program 1 times [2021-05-03 17:13:54,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:13:54,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041275928] [2021-05-03 17:13:54,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:13:54,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:54,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:13:54,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041275928] [2021-05-03 17:13:54,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371763783] [2021-05-03 17:13:54,686 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 [2021-05-03 17:13:54,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:54,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 17:13:54,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:13:54,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:13:54,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:13:54,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-03 17:13:54,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512214343] [2021-05-03 17:13:54,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:13:54,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:13:54,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:13:54,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:13:54,840 INFO L87 Difference]: Start difference. First operand 2137 states and 8396 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:54,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:13:54,934 INFO L93 Difference]: Finished difference Result 2794 states and 10644 transitions. [2021-05-03 17:13:54,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 17:13:54,935 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 17:13:54,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:13:54,953 INFO L225 Difference]: With dead ends: 2794 [2021-05-03 17:13:54,953 INFO L226 Difference]: Without dead ends: 2640 [2021-05-03 17:13:54,954 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:13:54,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2021-05-03 17:13:55,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 1918. [2021-05-03 17:13:55,037 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) [2021-05-03 17:13:55,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 7559 transitions. [2021-05-03 17:13:55,049 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 7559 transitions. Word has length 29 [2021-05-03 17:13:55,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:13:55,049 INFO L480 AbstractCegarLoop]: Abstraction has 1918 states and 7559 transitions. [2021-05-03 17:13:55,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:55,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 7559 transitions. [2021-05-03 17:13:55,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 17:13:55,058 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:13:55,058 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:13:55,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:13:55,273 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:13:55,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:13:55,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1661082892, now seen corresponding path program 2 times [2021-05-03 17:13:55,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:13:55,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837499984] [2021-05-03 17:13:55,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:13:55,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:13:55,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837499984] [2021-05-03 17:13:55,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111119392] [2021-05-03 17:13:55,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 17:13:55,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:13:55,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:13:55,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:13:55,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:13:55,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:13:55,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:13:55,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-05-03 17:13:55,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047975927] [2021-05-03 17:13:55,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 17:13:55,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:13:55,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 17:13:55,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 17:13:55,471 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) [2021-05-03 17:13:55,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:13:55,619 INFO L93 Difference]: Finished difference Result 5257 states and 20273 transitions. [2021-05-03 17:13:55,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 17:13:55,620 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 [2021-05-03 17:13:55,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:13:55,646 INFO L225 Difference]: With dead ends: 5257 [2021-05-03 17:13:55,647 INFO L226 Difference]: Without dead ends: 4937 [2021-05-03 17:13:55,647 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:13:55,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4937 states. [2021-05-03 17:13:55,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4937 to 2629. [2021-05-03 17:13:55,763 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) [2021-05-03 17:13:55,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2629 states to 2629 states and 10460 transitions. [2021-05-03 17:13:55,778 INFO L78 Accepts]: Start accepts. Automaton has 2629 states and 10460 transitions. Word has length 29 [2021-05-03 17:13:55,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:13:55,778 INFO L480 AbstractCegarLoop]: Abstraction has 2629 states and 10460 transitions. [2021-05-03 17:13:55,778 INFO L481 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) [2021-05-03 17:13:55,778 INFO L276 IsEmpty]: Start isEmpty. Operand 2629 states and 10460 transitions. [2021-05-03 17:13:55,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 17:13:55,789 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:13:55,789 INFO L551 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] [2021-05-03 17:13:56,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-03 17:13:56,005 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:13:56,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:13:56,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1512383048, now seen corresponding path program 3 times [2021-05-03 17:13:56,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:13:56,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479653135] [2021-05-03 17:13:56,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:13:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:56,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:13:56,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479653135] [2021-05-03 17:13:56,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650119911] [2021-05-03 17:13:56,064 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 [2021-05-03 17:13:56,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:13:56,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:13:56,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 17:13:56,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:13:56,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:13:56,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:13:56,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-05-03 17:13:56,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063087622] [2021-05-03 17:13:56,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:13:56,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:13:56,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:13:56,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:13:56,224 INFO L87 Difference]: Start difference. First operand 2629 states and 10460 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 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) [2021-05-03 17:13:57,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:13:57,004 INFO L93 Difference]: Finished difference Result 11182 states and 42971 transitions. [2021-05-03 17:13:57,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 17:13:57,005 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 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 [2021-05-03 17:13:57,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:13:57,073 INFO L225 Difference]: With dead ends: 11182 [2021-05-03 17:13:57,073 INFO L226 Difference]: Without dead ends: 10794 [2021-05-03 17:13:57,074 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 432.9ms TimeCoverageRelationStatistics Valid=311, Invalid=1171, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 17:13:57,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10794 states. [2021-05-03 17:13:57,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10794 to 5776. [2021-05-03 17:13:57,328 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) [2021-05-03 17:13:57,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5776 states to 5776 states and 23362 transitions. [2021-05-03 17:13:57,366 INFO L78 Accepts]: Start accepts. Automaton has 5776 states and 23362 transitions. Word has length 31 [2021-05-03 17:13:57,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:13:57,366 INFO L480 AbstractCegarLoop]: Abstraction has 5776 states and 23362 transitions. [2021-05-03 17:13:57,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 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) [2021-05-03 17:13:57,366 INFO L276 IsEmpty]: Start isEmpty. Operand 5776 states and 23362 transitions. [2021-05-03 17:13:57,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 17:13:57,389 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:13:57,389 INFO L551 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] [2021-05-03 17:13:57,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-03 17:13:57,616 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:13:57,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:13:57,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1087882488, now seen corresponding path program 4 times [2021-05-03 17:13:57,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:13:57,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100938819] [2021-05-03 17:13:57,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:13:57,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:57,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:13:57,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100938819] [2021-05-03 17:13:57,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145571250] [2021-05-03 17:13:57,682 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 [2021-05-03 17:13:57,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:13:57,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:13:57,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 17:13:57,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:13:57,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:13:57,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:13:57,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-03 17:13:57,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540126757] [2021-05-03 17:13:57,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:13:57,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:13:57,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:13:57,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:13:57,832 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) [2021-05-03 17:13:58,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:13:58,175 INFO L93 Difference]: Finished difference Result 14551 states and 57252 transitions. [2021-05-03 17:13:58,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 17:13:58,175 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 [2021-05-03 17:13:58,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:13:58,253 INFO L225 Difference]: With dead ends: 14551 [2021-05-03 17:13:58,253 INFO L226 Difference]: Without dead ends: 13651 [2021-05-03 17:13:58,254 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 135.1ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:13:58,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13651 states. [2021-05-03 17:13:58,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13651 to 8849. [2021-05-03 17:13:58,564 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) [2021-05-03 17:13:58,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8849 states to 8849 states and 37068 transitions. [2021-05-03 17:13:58,608 INFO L78 Accepts]: Start accepts. Automaton has 8849 states and 37068 transitions. Word has length 31 [2021-05-03 17:13:58,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:13:58,608 INFO L480 AbstractCegarLoop]: Abstraction has 8849 states and 37068 transitions. [2021-05-03 17:13:58,609 INFO L481 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) [2021-05-03 17:13:58,609 INFO L276 IsEmpty]: Start isEmpty. Operand 8849 states and 37068 transitions. [2021-05-03 17:13:58,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 17:13:58,640 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:13:58,640 INFO L551 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] [2021-05-03 17:13:58,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-03 17:13:58,853 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:13:58,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:13:58,853 INFO L82 PathProgramCache]: Analyzing trace with hash -96838436, now seen corresponding path program 5 times [2021-05-03 17:13:58,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:13:58,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569651668] [2021-05-03 17:13:58,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:13:58,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:58,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:13:58,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569651668] [2021-05-03 17:13:58,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400034035] [2021-05-03 17:13:58,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 17:13:58,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 17:13:58,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:13:58,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 17:13:58,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:13:59,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:13:59,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:13:59,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-05-03 17:13:59,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354048105] [2021-05-03 17:13:59,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 17:13:59,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:13:59,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 17:13:59,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:13:59,070 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) [2021-05-03 17:13:59,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:13:59,665 INFO L93 Difference]: Finished difference Result 24527 states and 98100 transitions. [2021-05-03 17:13:59,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 17:13:59,666 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 [2021-05-03 17:13:59,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:13:59,791 INFO L225 Difference]: With dead ends: 24527 [2021-05-03 17:13:59,791 INFO L226 Difference]: Without dead ends: 24223 [2021-05-03 17:13:59,792 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 254.0ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-05-03 17:13:59,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24223 states. [2021-05-03 17:14:00,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24223 to 12684. [2021-05-03 17:14:00,461 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) [2021-05-03 17:14:00,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12684 states to 12684 states and 55018 transitions. [2021-05-03 17:14:00,548 INFO L78 Accepts]: Start accepts. Automaton has 12684 states and 55018 transitions. Word has length 31 [2021-05-03 17:14:00,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:14:00,548 INFO L480 AbstractCegarLoop]: Abstraction has 12684 states and 55018 transitions. [2021-05-03 17:14:00,548 INFO L481 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) [2021-05-03 17:14:00,548 INFO L276 IsEmpty]: Start isEmpty. Operand 12684 states and 55018 transitions. [2021-05-03 17:14:00,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 17:14:00,610 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:14:00,610 INFO L551 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] [2021-05-03 17:14:00,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-03 17:14:00,825 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:14:00,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:14:00,825 INFO L82 PathProgramCache]: Analyzing trace with hash -554885668, now seen corresponding path program 6 times [2021-05-03 17:14:00,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:14:00,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409567566] [2021-05-03 17:14:00,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:14:00,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:14:00,891 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:14:00,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409567566] [2021-05-03 17:14:00,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473154222] [2021-05-03 17:14:00,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 17:14:00,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:14:00,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:14:00,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 17:14:00,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:14:01,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:14:01,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:14:01,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-05-03 17:14:01,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246876123] [2021-05-03 17:14:01,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:14:01,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:14:01,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:14:01,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:14:01,019 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) [2021-05-03 17:14:01,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:14:01,902 INFO L93 Difference]: Finished difference Result 61524 states and 263492 transitions. [2021-05-03 17:14:01,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 17:14:01,903 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 [2021-05-03 17:14:01,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:14:02,235 INFO L225 Difference]: With dead ends: 61524 [2021-05-03 17:14:02,235 INFO L226 Difference]: Without dead ends: 60380 [2021-05-03 17:14:02,235 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 304.8ms TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2021-05-03 17:14:02,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60380 states. [2021-05-03 17:14:04,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60380 to 33143. [2021-05-03 17:14:04,303 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) [2021-05-03 17:14:04,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33143 states to 33143 states and 157289 transitions. [2021-05-03 17:14:04,662 INFO L78 Accepts]: Start accepts. Automaton has 33143 states and 157289 transitions. Word has length 31 [2021-05-03 17:14:04,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:14:04,662 INFO L480 AbstractCegarLoop]: Abstraction has 33143 states and 157289 transitions. [2021-05-03 17:14:04,663 INFO L481 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) [2021-05-03 17:14:04,663 INFO L276 IsEmpty]: Start isEmpty. Operand 33143 states and 157289 transitions. [2021-05-03 17:14:04,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 17:14:04,800 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:14:04,800 INFO L551 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] [2021-05-03 17:14:05,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:14:05,001 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:14:05,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:14:05,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1161623840, now seen corresponding path program 7 times [2021-05-03 17:14:05,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:14:05,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638402175] [2021-05-03 17:14:05,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:14:05,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:14:05,053 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:14:05,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638402175] [2021-05-03 17:14:05,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168472225] [2021-05-03 17:14:05,054 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 [2021-05-03 17:14:05,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:14:05,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 17:14:05,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:14:05,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:14:05,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:14:05,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-03 17:14:05,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866700922] [2021-05-03 17:14:05,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:14:05,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:14:05,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:14:05,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:14:05,275 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) [2021-05-03 17:14:05,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:14:05,920 INFO L93 Difference]: Finished difference Result 44403 states and 202376 transitions. [2021-05-03 17:14:05,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 17:14:05,921 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 [2021-05-03 17:14:05,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:14:06,190 INFO L225 Difference]: With dead ends: 44403 [2021-05-03 17:14:06,191 INFO L226 Difference]: Without dead ends: 44271 [2021-05-03 17:14:06,191 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:14:06,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44271 states. [2021-05-03 17:14:07,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44271 to 33850. [2021-05-03 17:14:07,359 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) [2021-05-03 17:14:07,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33850 states to 33850 states and 160110 transitions. [2021-05-03 17:14:07,735 INFO L78 Accepts]: Start accepts. Automaton has 33850 states and 160110 transitions. Word has length 31 [2021-05-03 17:14:07,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:14:07,736 INFO L480 AbstractCegarLoop]: Abstraction has 33850 states and 160110 transitions. [2021-05-03 17:14:07,737 INFO L481 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) [2021-05-03 17:14:07,737 INFO L276 IsEmpty]: Start isEmpty. Operand 33850 states and 160110 transitions. [2021-05-03 17:14:07,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 17:14:07,884 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:14:07,885 INFO L551 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] [2021-05-03 17:14:08,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:14:08,101 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:14:08,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:14:08,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1949095460, now seen corresponding path program 8 times [2021-05-03 17:14:08,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:14:08,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480490966] [2021-05-03 17:14:08,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:14:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:14:08,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:14:08,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480490966] [2021-05-03 17:14:08,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783913753] [2021-05-03 17:14:08,189 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 [2021-05-03 17:14:08,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:14:08,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:14:08,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 17:14:08,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:14:08,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:14:08,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:14:08,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-05-03 17:14:08,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755980566] [2021-05-03 17:14:08,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:14:08,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:14:08,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:14:08,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:14:08,337 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) [2021-05-03 17:14:09,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:14:09,775 INFO L93 Difference]: Finished difference Result 66403 states and 284462 transitions. [2021-05-03 17:14:09,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 17:14:09,776 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 [2021-05-03 17:14:09,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:14:10,101 INFO L225 Difference]: With dead ends: 66403 [2021-05-03 17:14:10,101 INFO L226 Difference]: Without dead ends: 64922 [2021-05-03 17:14:10,102 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 636.9ms TimeCoverageRelationStatistics Valid=386, Invalid=1174, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 17:14:10,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64922 states. [2021-05-03 17:14:11,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64922 to 32872. [2021-05-03 17:14:11,703 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) [2021-05-03 17:14:11,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32872 states to 32872 states and 153094 transitions. [2021-05-03 17:14:11,840 INFO L78 Accepts]: Start accepts. Automaton has 32872 states and 153094 transitions. Word has length 31 [2021-05-03 17:14:11,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:14:11,840 INFO L480 AbstractCegarLoop]: Abstraction has 32872 states and 153094 transitions. [2021-05-03 17:14:11,840 INFO L481 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) [2021-05-03 17:14:11,840 INFO L276 IsEmpty]: Start isEmpty. Operand 32872 states and 153094 transitions. [2021-05-03 17:14:11,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 17:14:11,928 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:14:11,928 INFO L551 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] [2021-05-03 17:14:12,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-03 17:14:12,131 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:14:12,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:14:12,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1143514140, now seen corresponding path program 9 times [2021-05-03 17:14:12,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:14:12,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027019700] [2021-05-03 17:14:12,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:14:12,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:14:12,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:14:12,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027019700] [2021-05-03 17:14:12,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336711648] [2021-05-03 17:14:12,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 17:14:12,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:14:12,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:14:12,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 17:14:12,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:14:12,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:14:12,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:14:12,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-03 17:14:12,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107680994] [2021-05-03 17:14:12,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:14:12,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:14:12,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:14:12,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:14:12,314 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) [2021-05-03 17:14:13,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:14:13,517 INFO L93 Difference]: Finished difference Result 67837 states and 295603 transitions. [2021-05-03 17:14:13,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 17:14:13,518 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 [2021-05-03 17:14:13,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:14:13,803 INFO L225 Difference]: With dead ends: 67837 [2021-05-03 17:14:13,803 INFO L226 Difference]: Without dead ends: 67411 [2021-05-03 17:14:13,803 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 378.3ms TimeCoverageRelationStatistics Valid=253, Invalid=869, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 17:14:13,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67411 states. [2021-05-03 17:14:15,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67411 to 32800. [2021-05-03 17:14:15,301 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) [2021-05-03 17:14:15,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32800 states to 32800 states and 152429 transitions. [2021-05-03 17:14:15,841 INFO L78 Accepts]: Start accepts. Automaton has 32800 states and 152429 transitions. Word has length 31 [2021-05-03 17:14:15,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:14:15,841 INFO L480 AbstractCegarLoop]: Abstraction has 32800 states and 152429 transitions. [2021-05-03 17:14:15,841 INFO L481 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) [2021-05-03 17:14:15,841 INFO L276 IsEmpty]: Start isEmpty. Operand 32800 states and 152429 transitions. [2021-05-03 17:14:15,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 17:14:15,936 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:14:15,936 INFO L551 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] [2021-05-03 17:14:16,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:14:16,137 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:14:16,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:14:16,138 INFO L82 PathProgramCache]: Analyzing trace with hash -651453626, now seen corresponding path program 10 times [2021-05-03 17:14:16,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:14:16,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040378093] [2021-05-03 17:14:16,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:14:16,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:14:16,206 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:14:16,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040378093] [2021-05-03 17:14:16,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791287384] [2021-05-03 17:14:16,206 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 [2021-05-03 17:14:16,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:14:16,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:14:16,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 17:14:16,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:14:16,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 17:14:16,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:14:16,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-03 17:14:16,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362497780] [2021-05-03 17:14:16,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:14:16,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:14:16,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:14:16,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:14:16,323 INFO L87 Difference]: Start difference. First operand 32800 states and 152429 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:16,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:14:16,821 INFO L93 Difference]: Finished difference Result 54540 states and 247085 transitions. [2021-05-03 17:14:16,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 17:14:16,822 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 17:14:16,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:14:17,061 INFO L225 Difference]: With dead ends: 54540 [2021-05-03 17:14:17,061 INFO L226 Difference]: Without dead ends: 54365 [2021-05-03 17:14:17,061 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:14:17,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54365 states. [2021-05-03 17:14:18,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54365 to 44066. [2021-05-03 17:14:18,502 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) [2021-05-03 17:14:19,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44066 states to 44066 states and 208208 transitions. [2021-05-03 17:14:19,183 INFO L78 Accepts]: Start accepts. Automaton has 44066 states and 208208 transitions. Word has length 33 [2021-05-03 17:14:19,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:14:19,183 INFO L480 AbstractCegarLoop]: Abstraction has 44066 states and 208208 transitions. [2021-05-03 17:14:19,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:19,184 INFO L276 IsEmpty]: Start isEmpty. Operand 44066 states and 208208 transitions. [2021-05-03 17:14:19,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 17:14:19,313 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:14:19,314 INFO L551 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] [2021-05-03 17:14:19,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-03 17:14:19,514 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:14:19,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:14:19,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1136569790, now seen corresponding path program 11 times [2021-05-03 17:14:19,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:14:19,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324278364] [2021-05-03 17:14:19,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:14:19,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:14:19,567 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:14:19,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324278364] [2021-05-03 17:14:19,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506597386] [2021-05-03 17:14:19,568 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 [2021-05-03 17:14:19,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 17:14:19,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:14:19,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 17:14:19,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:14:19,692 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 17:14:19,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:14:19,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-03 17:14:19,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343682759] [2021-05-03 17:14:19,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:14:19,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:14:19,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:14:19,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:14:19,693 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) [2021-05-03 17:14:20,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:14:20,164 INFO L93 Difference]: Finished difference Result 55576 states and 253213 transitions. [2021-05-03 17:14:20,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 17:14:20,164 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 [2021-05-03 17:14:20,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:14:20,403 INFO L225 Difference]: With dead ends: 55576 [2021-05-03 17:14:20,404 INFO L226 Difference]: Without dead ends: 55382 [2021-05-03 17:14:20,404 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:14:20,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55382 states. [2021-05-03 17:14:21,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55382 to 44604. [2021-05-03 17:14:21,975 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) [2021-05-03 17:14:22,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44604 states to 44604 states and 210249 transitions. [2021-05-03 17:14:22,612 INFO L78 Accepts]: Start accepts. Automaton has 44604 states and 210249 transitions. Word has length 33 [2021-05-03 17:14:22,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:14:22,612 INFO L480 AbstractCegarLoop]: Abstraction has 44604 states and 210249 transitions. [2021-05-03 17:14:22,612 INFO L481 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) [2021-05-03 17:14:22,612 INFO L276 IsEmpty]: Start isEmpty. Operand 44604 states and 210249 transitions. [2021-05-03 17:14:22,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 17:14:22,741 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:14:22,742 INFO L551 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] [2021-05-03 17:14:22,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:14:22,942 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:14:22,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:14:22,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1774694910, now seen corresponding path program 12 times [2021-05-03 17:14:22,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:14:22,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234674364] [2021-05-03 17:14:22,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:14:22,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:14:23,013 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:14:23,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234674364] [2021-05-03 17:14:23,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292549241] [2021-05-03 17:14:23,013 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 [2021-05-03 17:14:23,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 17:14:23,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:14:23,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 17:14:23,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:14:23,167 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:14:23,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:14:23,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-03 17:14:23,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772253021] [2021-05-03 17:14:23,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:14:23,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:14:23,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:14:23,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:14:23,169 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) [2021-05-03 17:14:25,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:14:25,353 INFO L93 Difference]: Finished difference Result 141398 states and 642861 transitions. [2021-05-03 17:14:25,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 17:14:25,353 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 [2021-05-03 17:14:25,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:14:26,085 INFO L225 Difference]: With dead ends: 141398 [2021-05-03 17:14:26,086 INFO L226 Difference]: Without dead ends: 140699 [2021-05-03 17:14:26,086 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 387.4ms TimeCoverageRelationStatistics Valid=312, Invalid=1020, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 17:14:26,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140699 states. [2021-05-03 17:14:29,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140699 to 85571. [2021-05-03 17:14:29,931 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) [2021-05-03 17:14:30,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85571 states to 85571 states and 407516 transitions. [2021-05-03 17:14:30,958 INFO L78 Accepts]: Start accepts. Automaton has 85571 states and 407516 transitions. Word has length 33 [2021-05-03 17:14:30,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:14:30,958 INFO L480 AbstractCegarLoop]: Abstraction has 85571 states and 407516 transitions. [2021-05-03 17:14:30,958 INFO L481 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) [2021-05-03 17:14:30,958 INFO L276 IsEmpty]: Start isEmpty. Operand 85571 states and 407516 transitions. [2021-05-03 17:14:31,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 17:14:31,194 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:14:31,194 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:14:31,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-03 17:14:31,395 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:14:31,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:14:31,395 INFO L82 PathProgramCache]: Analyzing trace with hash -908424846, now seen corresponding path program 13 times [2021-05-03 17:14:31,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:14:31,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035368979] [2021-05-03 17:14:31,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:14:31,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:14:31,463 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 17:14:31,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035368979] [2021-05-03 17:14:31,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797264470] [2021-05-03 17:14:31,463 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 [2021-05-03 17:14:31,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:14:31,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 17:14:31,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:14:31,581 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:14:31,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:14:31,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-05-03 17:14:31,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333462947] [2021-05-03 17:14:31,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:14:31,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:14:31,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:14:31,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:14:31,583 INFO L87 Difference]: Start difference. First operand 85571 states and 407516 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:35,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:14:35,017 INFO L93 Difference]: Finished difference Result 205700 states and 956596 transitions. [2021-05-03 17:14:35,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 17:14:35,018 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 17:14:35,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:14:36,177 INFO L225 Difference]: With dead ends: 205700 [2021-05-03 17:14:36,178 INFO L226 Difference]: Without dead ends: 204198 [2021-05-03 17:14:36,178 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 243.3ms TimeCoverageRelationStatistics Valid=252, Invalid=678, Unknown=0, NotChecked=0, Total=930 [2021-05-03 17:14:36,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204198 states. [2021-05-03 17:14:43,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204198 to 179419. [2021-05-03 17:14:43,734 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) [2021-05-03 17:14:45,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179419 states to 179419 states and 848712 transitions. [2021-05-03 17:14:45,842 INFO L78 Accepts]: Start accepts. Automaton has 179419 states and 848712 transitions. Word has length 35 [2021-05-03 17:14:45,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:14:45,842 INFO L480 AbstractCegarLoop]: Abstraction has 179419 states and 848712 transitions. [2021-05-03 17:14:45,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:45,842 INFO L276 IsEmpty]: Start isEmpty. Operand 179419 states and 848712 transitions. [2021-05-03 17:14:46,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 17:14:46,724 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:14:46,724 INFO L551 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] [2021-05-03 17:14:46,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-03 17:14:46,925 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:14:46,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:14:46,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1478372264, now seen corresponding path program 14 times [2021-05-03 17:14:46,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:14:46,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118288677] [2021-05-03 17:14:46,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:14:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:14:46,992 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:14:46,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118288677] [2021-05-03 17:14:46,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140501636] [2021-05-03 17:14:46,993 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 [2021-05-03 17:14:47,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:14:47,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:14:47,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 17:14:47,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:14:47,132 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 17:14:47,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:14:47,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-05-03 17:14:47,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649744762] [2021-05-03 17:14:47,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:14:47,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:14:47,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:14:47,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:14:47,134 INFO L87 Difference]: Start difference. First operand 179419 states and 848712 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 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) [2021-05-03 17:14:52,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:14:52,729 INFO L93 Difference]: Finished difference Result 389060 states and 1801255 transitions. [2021-05-03 17:14:52,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 17:14:52,730 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 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 [2021-05-03 17:14:52,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:14:56,409 INFO L225 Difference]: With dead ends: 389060 [2021-05-03 17:14:56,410 INFO L226 Difference]: Without dead ends: 387773 [2021-05-03 17:14:56,410 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 360.6ms TimeCoverageRelationStatistics Valid=314, Invalid=1246, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 17:14:57,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387773 states. [2021-05-03 17:15:09,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387773 to 285677. [2021-05-03 17:15:09,833 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) [2021-05-03 17:15:13,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285677 states to 285677 states and 1374901 transitions. [2021-05-03 17:15:13,099 INFO L78 Accepts]: Start accepts. Automaton has 285677 states and 1374901 transitions. Word has length 35 [2021-05-03 17:15:13,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:15:13,099 INFO L480 AbstractCegarLoop]: Abstraction has 285677 states and 1374901 transitions. [2021-05-03 17:15:13,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 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) [2021-05-03 17:15:13,099 INFO L276 IsEmpty]: Start isEmpty. Operand 285677 states and 1374901 transitions. [2021-05-03 17:15:14,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 17:15:14,261 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:15:14,261 INFO L551 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] [2021-05-03 17:15:14,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-03 17:15:14,462 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:15:14,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:15:14,462 INFO L82 PathProgramCache]: Analyzing trace with hash 828413272, now seen corresponding path program 15 times [2021-05-03 17:15:14,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:15:14,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103812397] [2021-05-03 17:15:14,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:15:14,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:15:14,531 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:15:14,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103812397] [2021-05-03 17:15:14,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687821468] [2021-05-03 17:15:14,531 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 [2021-05-03 17:15:14,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:15:14,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:15:14,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 17:15:14,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:15:14,665 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 17:15:14,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:15:14,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-05-03 17:15:14,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561783222] [2021-05-03 17:15:14,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:15:14,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:15:14,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:15:14,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:15:14,667 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) [2021-05-03 17:15:15,612 WARN L205 SmtUtils]: Spent 877.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-05-03 17:15:34,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:15:34,127 INFO L93 Difference]: Finished difference Result 1050714 states and 4955717 transitions. [2021-05-03 17:15:34,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-03 17:15:34,127 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 [2021-05-03 17:15:34,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:15:45,036 INFO L225 Difference]: With dead ends: 1050714 [2021-05-03 17:15:45,037 INFO L226 Difference]: Without dead ends: 1048522 [2021-05-03 17:15:45,037 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 1519.2ms TimeCoverageRelationStatistics Valid=618, Invalid=2352, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 17:15:48,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048522 states. [2021-05-03 17:16:23,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048522 to 706654. [2021-05-03 17:16:25,342 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) [2021-05-03 17:16:34,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706654 states to 706654 states and 3502566 transitions. [2021-05-03 17:16:34,712 INFO L78 Accepts]: Start accepts. Automaton has 706654 states and 3502566 transitions. Word has length 35 [2021-05-03 17:16:34,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:16:34,713 INFO L480 AbstractCegarLoop]: Abstraction has 706654 states and 3502566 transitions. [2021-05-03 17:16:34,713 INFO L481 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) [2021-05-03 17:16:34,713 INFO L276 IsEmpty]: Start isEmpty. Operand 706654 states and 3502566 transitions. [2021-05-03 17:16:38,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 17:16:38,248 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:16:38,248 INFO L551 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] [2021-05-03 17:16:38,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-03 17:16:38,449 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:16:38,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:16:38,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1638836116, now seen corresponding path program 16 times [2021-05-03 17:16:38,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:16:38,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730795220] [2021-05-03 17:16:38,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:16:38,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:16:38,517 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:16:38,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730795220] [2021-05-03 17:16:38,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861814291] [2021-05-03 17:16:38,517 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 [2021-05-03 17:16:38,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:16:38,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:16:38,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 17:16:38,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:16:38,638 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 17:16:38,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:16:38,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-05-03 17:16:38,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605581908] [2021-05-03 17:16:38,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:16:38,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:16:38,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:16:38,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:16:38,640 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) [2021-05-03 17:16:59,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:16:59,442 INFO L93 Difference]: Finished difference Result 955483 states and 4512570 transitions. [2021-05-03 17:16:59,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 17:16:59,457 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 [2021-05-03 17:16:59,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:17:09,706 INFO L225 Difference]: With dead ends: 955483 [2021-05-03 17:17:09,707 INFO L226 Difference]: Without dead ends: 947993 [2021-05-03 17:17:09,707 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1422.4ms TimeCoverageRelationStatistics Valid=387, Invalid=1593, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 17:17:12,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947993 states. [2021-05-03 17:17:42,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947993 to 704846. [2021-05-03 17:17:45,122 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) [2021-05-03 17:17:58,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704846 states to 704846 states and 3477176 transitions. [2021-05-03 17:17:58,712 INFO L78 Accepts]: Start accepts. Automaton has 704846 states and 3477176 transitions. Word has length 35 [2021-05-03 17:17:58,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:17:58,712 INFO L480 AbstractCegarLoop]: Abstraction has 704846 states and 3477176 transitions. [2021-05-03 17:17:58,712 INFO L481 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) [2021-05-03 17:17:58,712 INFO L276 IsEmpty]: Start isEmpty. Operand 704846 states and 3477176 transitions. [2021-05-03 17:18:04,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 17:18:04,649 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:18:04,649 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:18:04,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-03 17:18:04,865 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:18:04,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:18:04,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1224532632, now seen corresponding path program 17 times [2021-05-03 17:18:04,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:18:04,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498641507] [2021-05-03 17:18:04,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:18:04,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:18:04,969 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 17:18:04,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498641507] [2021-05-03 17:18:04,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130738630] [2021-05-03 17:18:04,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 17:18:05,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:18:05,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:18:05,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 17:18:05,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:18:05,226 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 17:18:05,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:18:05,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-03 17:18:05,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275728393] [2021-05-03 17:18:05,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:18:05,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:18:05,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:18:05,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:18:05,230 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)