/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/chl/sre-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 17:54:33,930 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 17:54:33,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 17:54:33,965 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-19 17:54:33,965 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-19 17:54:33,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-19 17:54:33,970 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-19 17:54:33,975 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-19 17:54:33,977 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-19 17:54:33,981 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-19 17:54:33,982 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-19 17:54:33,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-19 17:54:33,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 17:54:33,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 17:54:33,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 17:54:33,986 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 17:54:33,987 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 17:54:33,987 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 17:54:33,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 17:54:33,994 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 17:54:33,995 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 17:54:33,996 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 17:54:33,997 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 17:54:33,998 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 17:54:34,002 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-19 17:54:34,002 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-19 17:54:34,002 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-19 17:54:34,003 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-19 17:54:34,003 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-19 17:54:34,003 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-19 17:54:34,003 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-19 17:54:34,004 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-19 17:54:34,004 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-19 17:54:34,005 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-19 17:54:34,005 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-19 17:54:34,006 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-19 17:54:34,006 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-19 17:54:34,006 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-19 17:54:34,006 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 17:54:34,007 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 17:54:34,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 17:54:34,012 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 [2021-02-19 17:54:34,037 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 17:54:34,037 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 17:54:34,038 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 17:54:34,038 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 17:54:34,040 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 17:54:34,040 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 17:54:34,040 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 17:54:34,040 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 17:54:34,041 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 17:54:34,041 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 17:54:34,041 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 17:54:34,041 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 17:54:34,042 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 17:54:34,042 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 17:54:34,042 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 17:54:34,042 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 17:54:34,042 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 17:54:34,042 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 17:54:34,042 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 17:54:34,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 17:54:34,042 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 17:54:34,042 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 17:54:34,043 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 17:54:34,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:54:34,043 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 17:54:34,043 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 17:54:34,043 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 17:54:34,043 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 17:54:34,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 17:54:34,043 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 17:54:34,043 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 17:54:34,043 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 17:54:34,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 17:54:34,283 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 17:54:34,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 17:54:34,285 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 17:54:34,288 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 17:54:34,288 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/sre-subst.wvr.bpl [2021-02-19 17:54:34,288 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/sre-subst.wvr.bpl' [2021-02-19 17:54:34,304 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 17:54:34,307 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 17:54:34,310 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 17:54:34,310 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 17:54:34,310 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 17:54:34,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sre-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:54:34" (1/1) ... [2021-02-19 17:54:34,325 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sre-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:54:34" (1/1) ... [2021-02-19 17:54:34,330 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 17:54:34,331 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 17:54:34,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 17:54:34,331 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 17:54:34,335 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sre-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:54:34" (1/1) ... [2021-02-19 17:54:34,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sre-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:54:34" (1/1) ... [2021-02-19 17:54:34,336 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sre-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:54:34" (1/1) ... [2021-02-19 17:54:34,336 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sre-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:54:34" (1/1) ... [2021-02-19 17:54:34,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sre-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:54:34" (1/1) ... [2021-02-19 17:54:34,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sre-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:54:34" (1/1) ... [2021-02-19 17:54:34,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sre-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:54:34" (1/1) ... [2021-02-19 17:54:34,339 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 17:54:34,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 17:54:34,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 17:54:34,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 17:54:34,341 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sre-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:54:34" (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 [2021-02-19 17:54:34,384 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 17:54:34,385 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 17:54:34,385 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 17:54:34,385 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 17:54:34,385 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 17:54:34,385 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 17:54:34,385 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 17:54:34,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 17:54:34,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 17:54:34,385 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-02-19 17:54:34,385 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-02-19 17:54:34,385 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-02-19 17:54:34,386 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 17:54:34,502 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 17:54:34,502 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 17:54:34,504 INFO L202 PluginConnector]: Adding new model sre-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:54:34 BoogieIcfgContainer [2021-02-19 17:54:34,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 17:54:34,505 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 17:54:34,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 17:54:34,507 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 17:54:34,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sre-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:54:34" (1/2) ... [2021-02-19 17:54:34,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ef97576 and model type sre-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:54:34, skipping insertion in model container [2021-02-19 17:54:34,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sre-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:54:34" (2/2) ... [2021-02-19 17:54:34,511 INFO L111 eAbstractionObserver]: Analyzing ICFG sre-subst.wvr.bpl [2021-02-19 17:54:34,515 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 17:54:34,515 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 17:54:34,517 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 17:54:34,518 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 17:54:34,573 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-02-19 17:54:34,584 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-02-19 17:54:34,609 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 17:54:34,609 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 17:54:34,609 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 17:54:34,609 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 17:54:34,609 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 17:54:34,609 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 17:54:34,609 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 17:54:34,609 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 17:54:34,615 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 19 transitions, 62 flow [2021-02-19 17:54:34,628 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:34,630 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:34,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:54:34,635 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:34,635 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:34,635 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:34,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:34,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1166045959, now seen corresponding path program 1 times [2021-02-19 17:54:34,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:34,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999295261] [2021-02-19 17:54:34,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:35,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:35,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999295261] [2021-02-19 17:54:35,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:54:35,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 17:54:35,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544659830] [2021-02-19 17:54:35,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:54:35,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:35,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:54:35,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:54:35,026 INFO L87 Difference]: Start difference. First operand has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 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 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:35,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:35,188 INFO L93 Difference]: Finished difference Result 98 states and 183 transitions. [2021-02-19 17:54:35,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:54:35,189 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-02-19 17:54:35,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:35,197 INFO L225 Difference]: With dead ends: 98 [2021-02-19 17:54:35,198 INFO L226 Difference]: Without dead ends: 72 [2021-02-19 17:54:35,199 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:54:35,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-02-19 17:54:35,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 55. [2021-02-19 17:54:35,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:35,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 105 transitions. [2021-02-19 17:54:35,228 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 105 transitions. Word has length 14 [2021-02-19 17:54:35,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:35,229 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 105 transitions. [2021-02-19 17:54:35,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:35,229 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 105 transitions. [2021-02-19 17:54:35,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:54:35,229 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:35,230 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:35,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 17:54:35,230 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:35,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:35,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1802957561, now seen corresponding path program 2 times [2021-02-19 17:54:35,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:35,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435601177] [2021-02-19 17:54:35,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:35,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:35,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:35,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435601177] [2021-02-19 17:54:35,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:54:35,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 17:54:35,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084948182] [2021-02-19 17:54:35,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:54:35,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:35,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:54:35,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:54:35,428 INFO L87 Difference]: Start difference. First operand 55 states and 105 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:35,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:35,551 INFO L93 Difference]: Finished difference Result 93 states and 168 transitions. [2021-02-19 17:54:35,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:54:35,552 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-02-19 17:54:35,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:35,553 INFO L225 Difference]: With dead ends: 93 [2021-02-19 17:54:35,553 INFO L226 Difference]: Without dead ends: 65 [2021-02-19 17:54:35,554 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:54:35,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-02-19 17:54:35,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 48. [2021-02-19 17:54:35,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:35,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 91 transitions. [2021-02-19 17:54:35,566 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 91 transitions. Word has length 14 [2021-02-19 17:54:35,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:35,566 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 91 transitions. [2021-02-19 17:54:35,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:35,566 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 91 transitions. [2021-02-19 17:54:35,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:54:35,567 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:35,568 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:35,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 17:54:35,568 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:35,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:35,569 INFO L82 PathProgramCache]: Analyzing trace with hash 2138675463, now seen corresponding path program 3 times [2021-02-19 17:54:35,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:35,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568450718] [2021-02-19 17:54:35,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:35,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:35,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568450718] [2021-02-19 17:54:35,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:54:35,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 17:54:35,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219735318] [2021-02-19 17:54:35,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:54:35,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:35,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:54:35,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:54:35,709 INFO L87 Difference]: Start difference. First operand 48 states and 91 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:35,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:35,833 INFO L93 Difference]: Finished difference Result 80 states and 141 transitions. [2021-02-19 17:54:35,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:54:35,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-02-19 17:54:35,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:35,835 INFO L225 Difference]: With dead ends: 80 [2021-02-19 17:54:35,835 INFO L226 Difference]: Without dead ends: 54 [2021-02-19 17:54:35,835 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:54:35,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-02-19 17:54:35,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2021-02-19 17:54:35,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 36 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:35,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 64 transitions. [2021-02-19 17:54:35,840 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 64 transitions. Word has length 14 [2021-02-19 17:54:35,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:35,840 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 64 transitions. [2021-02-19 17:54:35,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:35,840 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 64 transitions. [2021-02-19 17:54:35,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:54:35,840 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:35,840 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:35,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 17:54:35,841 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:35,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:35,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1206578217, now seen corresponding path program 4 times [2021-02-19 17:54:35,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:35,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156890010] [2021-02-19 17:54:35,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:35,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:36,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:36,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156890010] [2021-02-19 17:54:36,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:54:36,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 17:54:36,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041837252] [2021-02-19 17:54:36,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:54:36,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:36,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:54:36,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:54:36,017 INFO L87 Difference]: Start difference. First operand 37 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:36,243 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-02-19 17:54:36,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:36,256 INFO L93 Difference]: Finished difference Result 56 states and 96 transitions. [2021-02-19 17:54:36,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:54:36,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-02-19 17:54:36,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:36,257 INFO L225 Difference]: With dead ends: 56 [2021-02-19 17:54:36,257 INFO L226 Difference]: Without dead ends: 33 [2021-02-19 17:54:36,257 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:54:36,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-02-19 17:54:36,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-02-19 17:54:36,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:36,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 56 transitions. [2021-02-19 17:54:36,259 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 56 transitions. Word has length 14 [2021-02-19 17:54:36,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:36,259 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 56 transitions. [2021-02-19 17:54:36,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:36,259 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 56 transitions. [2021-02-19 17:54:36,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:54:36,260 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:36,260 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:36,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 17:54:36,260 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:36,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:36,260 INFO L82 PathProgramCache]: Analyzing trace with hash 531109417, now seen corresponding path program 5 times [2021-02-19 17:54:36,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:36,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980611466] [2021-02-19 17:54:36,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:36,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:36,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:36,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980611466] [2021-02-19 17:54:36,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:54:36,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 17:54:36,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907676861] [2021-02-19 17:54:36,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:54:36,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:36,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:54:36,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:54:36,409 INFO L87 Difference]: Start difference. First operand 33 states and 56 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:36,630 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-02-19 17:54:36,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:36,634 INFO L93 Difference]: Finished difference Result 48 states and 80 transitions. [2021-02-19 17:54:36,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:54:36,634 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-02-19 17:54:36,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:36,635 INFO L225 Difference]: With dead ends: 48 [2021-02-19 17:54:36,635 INFO L226 Difference]: Without dead ends: 27 [2021-02-19 17:54:36,638 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:54:36,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-02-19 17:54:36,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-02-19 17:54:36,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:36,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 41 transitions. [2021-02-19 17:54:36,642 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 41 transitions. Word has length 14 [2021-02-19 17:54:36,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:36,642 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 41 transitions. [2021-02-19 17:54:36,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:36,642 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 41 transitions. [2021-02-19 17:54:36,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:54:36,643 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:36,643 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:36,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 17:54:36,643 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:36,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:36,644 INFO L82 PathProgramCache]: Analyzing trace with hash 202726535, now seen corresponding path program 6 times [2021-02-19 17:54:36,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:36,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934941673] [2021-02-19 17:54:36,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:36,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934941673] [2021-02-19 17:54:36,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:54:36,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 17:54:36,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314663885] [2021-02-19 17:54:36,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:54:36,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:36,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:54:36,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:54:36,825 INFO L87 Difference]: Start difference. First operand 27 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:37,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:37,032 INFO L93 Difference]: Finished difference Result 25 states and 39 transitions. [2021-02-19 17:54:37,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:54:37,034 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-02-19 17:54:37,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:37,034 INFO L225 Difference]: With dead ends: 25 [2021-02-19 17:54:37,034 INFO L226 Difference]: Without dead ends: 0 [2021-02-19 17:54:37,038 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:54:37,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-19 17:54:37,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-19 17:54:37,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:37,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-19 17:54:37,039 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-02-19 17:54:37,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:37,039 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-19 17:54:37,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:37,039 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-19 17:54:37,039 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-19 17:54:37,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-19 17:54:37,043 INFO L202 PluginConnector]: Adding new model sre-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 05:54:37 BasicIcfg [2021-02-19 17:54:37,043 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 17:54:37,043 INFO L168 Benchmark]: Toolchain (without parser) took 2738.70 ms. Allocated memory was 255.9 MB in the beginning and 350.2 MB in the end (delta: 94.4 MB). Free memory was 236.1 MB in the beginning and 334.6 MB in the end (delta: -98.4 MB). Peak memory consumption was 102.9 MB. Max. memory is 16.0 GB. [2021-02-19 17:54:37,044 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 255.9 MB. Free memory is still 237.1 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 17:54:37,044 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.28 ms. Allocated memory is still 255.9 MB. Free memory was 235.6 MB in the beginning and 234.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 17:54:37,044 INFO L168 Benchmark]: Boogie Preprocessor took 7.97 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 233.3 MB in the end (delta: 855.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 17:54:37,044 INFO L168 Benchmark]: RCFGBuilder took 164.59 ms. Allocated memory is still 255.9 MB. Free memory was 233.3 MB in the beginning and 239.5 MB in the end (delta: -6.2 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. [2021-02-19 17:54:37,045 INFO L168 Benchmark]: TraceAbstraction took 2537.95 ms. Allocated memory was 255.9 MB in the beginning and 350.2 MB in the end (delta: 94.4 MB). Free memory was 239.5 MB in the beginning and 334.6 MB in the end (delta: -95.1 MB). Peak memory consumption was 105.3 MB. Max. memory is 16.0 GB. [2021-02-19 17:54:37,046 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 255.9 MB. Free memory is still 237.1 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.28 ms. Allocated memory is still 255.9 MB. Free memory was 235.6 MB in the beginning and 234.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 7.97 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 233.3 MB in the end (delta: 855.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 164.59 ms. Allocated memory is still 255.9 MB. Free memory was 233.3 MB in the beginning and 239.5 MB in the end (delta: -6.2 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 2537.95 ms. Allocated memory was 255.9 MB in the beginning and 350.2 MB in the end (delta: 94.4 MB). Free memory was 239.5 MB in the beginning and 334.6 MB in the end (delta: -95.1 MB). Peak memory consumption was 105.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.4s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 119 SDtfs, 147 SDslu, 177 SDs, 0 SdLazy, 80 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 51 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 28626 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...