/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-Sleep-NoLbe-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/two-queue.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 21:56:04,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 21:56:04,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 21:56:04,195 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 21:56:04,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 21:56:04,202 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 21:56:04,203 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 21:56:04,203 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 21:56:04,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 21:56:04,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 21:56:04,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 21:56:04,207 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 21:56:04,208 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 21:56:04,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 21:56:04,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 21:56:04,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 21:56:04,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-19 21:56:04,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 21:56:04,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 21:56:04,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 21:56:04,218 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-Sleep-NoLbe-Delay.epf [2021-02-19 21:56:04,232 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 21:56:04,232 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 21:56:04,233 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 21:56:04,233 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 21:56:04,234 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 21:56:04,234 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 21:56:04,234 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 21:56:04,234 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 21:56:04,234 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 21:56:04,234 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 21:56:04,234 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 21:56:04,234 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 21:56:04,234 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 21:56:04,235 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 21:56:04,235 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 21:56:04,235 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 21:56:04,235 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 21:56:04,235 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 21:56:04,235 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 21:56:04,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 21:56:04,235 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 21:56:04,235 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 21:56:04,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 21:56:04,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 21:56:04,236 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 21:56:04,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 21:56:04,236 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 21:56:04,236 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 21:56:04,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 21:56:04,236 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 21:56:04,236 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2021-02-19 21:56:04,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 21:56:04,237 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-02-19 21:56:04,237 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 21:56:04,450 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 21:56:04,469 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 21:56:04,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 21:56:04,472 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 21:56:04,473 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 21:56:04,476 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/two-queue.wvr.bpl [2021-02-19 21:56:04,477 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/two-queue.wvr.bpl' [2021-02-19 21:56:04,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 21:56:04,520 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 21:56:04,520 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 21:56:04,520 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 21:56:04,521 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 21:56:04,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 09:56:04" (1/1) ... [2021-02-19 21:56:04,534 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 09:56:04" (1/1) ... [2021-02-19 21:56:04,538 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 21:56:04,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 21:56:04,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 21:56:04,539 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 21:56:04,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 09:56:04" (1/1) ... [2021-02-19 21:56:04,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 09:56:04" (1/1) ... [2021-02-19 21:56:04,544 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 09:56:04" (1/1) ... [2021-02-19 21:56:04,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 09:56:04" (1/1) ... [2021-02-19 21:56:04,546 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 09:56:04" (1/1) ... [2021-02-19 21:56:04,547 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 09:56:04" (1/1) ... [2021-02-19 21:56:04,548 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 09:56:04" (1/1) ... [2021-02-19 21:56:04,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 21:56:04,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 21:56:04,551 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 21:56:04,551 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 21:56:04,552 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 09:56:04" (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 21:56:04,596 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 21:56:04,596 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 21:56:04,596 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 21:56:04,596 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 21:56:04,597 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 21:56:04,597 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 21:56:04,597 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 21:56:04,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 21:56:04,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 21:56:04,598 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 21:56:04,745 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 21:56:04,745 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 21:56:04,746 INFO L202 PluginConnector]: Adding new model two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 09:56:04 BoogieIcfgContainer [2021-02-19 21:56:04,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 21:56:04,747 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 21:56:04,748 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 21:56:04,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 21:56:04,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 09:56:04" (1/2) ... [2021-02-19 21:56:04,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d13af2f and model type two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 09:56:04, skipping insertion in model container [2021-02-19 21:56:04,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 09:56:04" (2/2) ... [2021-02-19 21:56:04,751 INFO L111 eAbstractionObserver]: Analyzing ICFG two-queue.wvr.bpl [2021-02-19 21:56:04,754 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 21:56:04,755 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 21:56:04,757 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 21:56:04,757 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 21:56:04,809 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-02-19 21:56:04,820 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-02-19 21:56:04,844 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 21:56:04,844 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 21:56:04,844 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 21:56:04,844 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 21:56:04,844 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 21:56:04,844 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 21:56:04,844 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 21:56:04,845 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 21:56:04,908 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 21:56:04,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 21:56:04,911 INFO L82 PathProgramCache]: Analyzing trace with hash 319432284, now seen corresponding path program 1 times [2021-02-19 21:56:04,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 21:56:04,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341068658] [2021-02-19 21:56:04,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 21:56:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 21:56:05,015 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 21:56:05,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341068658] [2021-02-19 21:56:05,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 21:56:05,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-02-19 21:56:05,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846044560] [2021-02-19 21:56:05,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 21:56:05,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 21:56:05,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 21:56:05,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 21:56:05,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-02-19 21:56:05,032 INFO L480 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-02-19 21:56:05,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 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 21:56:05,034 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-02-19 21:56:05,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 21:56:05,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 21:56:05,102 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 21:56:05,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 21:56:05,103 INFO L82 PathProgramCache]: Analyzing trace with hash 140094047, now seen corresponding path program 1 times [2021-02-19 21:56:05,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 21:56:05,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273595713] [2021-02-19 21:56:05,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 21:56:05,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 21:56:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 21:56:05,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273595713] [2021-02-19 21:56:05,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 21:56:05,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-02-19 21:56:05,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104126678] [2021-02-19 21:56:05,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 21:56:05,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 21:56:05,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 21:56:05,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 21:56:05,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-02-19 21:56:05,147 INFO L480 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-02-19 21:56:05,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 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 21:56:05,147 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-02-19 21:56:05,147 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-02-19 21:56:05,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 21:56:05,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 21:56:05,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 21:56:05,171 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 21:56:05,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 21:56:05,172 INFO L82 PathProgramCache]: Analyzing trace with hash -15010014, now seen corresponding path program 1 times [2021-02-19 21:56:05,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 21:56:05,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562408051] [2021-02-19 21:56:05,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 21:56:05,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 21:56:05,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 21:56:05,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562408051] [2021-02-19 21:56:05,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142991939] [2021-02-19 21:56:05,392 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 [2021-02-19 21:56:05,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 21:56:05,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 21:56:05,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 21:56:05,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-02-19 21:56:05,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 21:56:05,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 21:56:05,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 21:56:05,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:11 [2021-02-19 21:56:05,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-02-19 21:56:05,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 21:56:05,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 21:56:05,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 21:56:05,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:9 [2021-02-19 21:56:05,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 21:56:05,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 21:56:05,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 21:56:05,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746288810] [2021-02-19 21:56:05,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 21:56:05,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 21:56:05,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 21:56:05,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 21:56:05,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-02-19 21:56:05,725 INFO L480 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-02-19 21:56:05,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-02-19 21:56:05,725 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-02-19 21:56:05,725 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-02-19 21:56:05,725 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-02-19 21:56:06,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 21:56:06,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 21:56:06,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 21:56:06,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 21:56:06,254 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 21:56:06,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 21:56:06,254 INFO L82 PathProgramCache]: Analyzing trace with hash -362239963, now seen corresponding path program 2 times [2021-02-19 21:56:06,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 21:56:06,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166299822] [2021-02-19 21:56:06,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 21:56:06,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 21:56:06,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 21:56:06,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166299822] [2021-02-19 21:56:06,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281372634] [2021-02-19 21:56:06,322 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 21:56:06,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 21:56:06,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 21:56:06,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2021-02-19 21:56:06,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 21:56:06,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 21:56:06,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-02-19 21:56:06,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-02-19 21:56:06,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31427972] [2021-02-19 21:56:06,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 21:56:06,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 21:56:06,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 21:56:06,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-02-19 21:56:06,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-02-19 21:56:06,427 INFO L480 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-02-19 21:56:06,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) 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) [2021-02-19 21:56:06,427 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-02-19 21:56:06,427 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-02-19 21:56:06,427 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 12 states. [2021-02-19 21:56:06,427 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-02-19 21:56:06,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 21:56:06,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 21:56:06,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 21:56:06,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 21:56:06,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 21:56:06,662 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 21:56:06,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 21:56:06,662 INFO L82 PathProgramCache]: Analyzing trace with hash -989419282, now seen corresponding path program 3 times [2021-02-19 21:56:06,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 21:56:06,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739470604] [2021-02-19 21:56:06,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 21:56:06,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 21:56:06,706 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 21:56:06,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739470604] [2021-02-19 21:56:06,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969191698] [2021-02-19 21:56:06,706 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 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 [2021-02-19 21:56:06,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 21:56:06,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 21:56:06,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 21:56:06,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 21:56:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-02-19 21:56:06,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-02-19 21:56:06,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-02-19 21:56:06,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477766886] [2021-02-19 21:56:06,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 21:56:06,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 21:56:06,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 21:56:06,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-02-19 21:56:06,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-02-19 21:56:06,800 INFO L480 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-02-19 21:56:06,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 21:56:06,800 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-02-19 21:56:06,801 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-02-19 21:56:06,801 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 12 states. [2021-02-19 21:56:06,801 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-02-19 21:56:06,801 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-02-19 21:56:06,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 21:56:06,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 21:56:06,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 21:56:06,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 21:56:06,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 21:56:07,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 21:56:07,014 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 21:56:07,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 21:56:07,015 INFO L82 PathProgramCache]: Analyzing trace with hash 575250920, now seen corresponding path program 4 times [2021-02-19 21:56:07,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 21:56:07,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417817884] [2021-02-19 21:56:07,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 21:56:07,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 21:56:07,278 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 21:56:07,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417817884] [2021-02-19 21:56:07,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411911114] [2021-02-19 21:56:07,278 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 21:56:07,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 21:56:07,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 21:56:07,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 21:56:07,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 21:56:07,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-02-19 21:56:07,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 21:56:07,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 21:56:07,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 21:56:07,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-02-19 21:56:07,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-02-19 21:56:07,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 21:56:07,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 21:56:07,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 21:56:07,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:9 [2021-02-19 21:56:07,465 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 21:56:07,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 21:56:07,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-02-19 21:56:07,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997447649] [2021-02-19 21:56:07,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 21:56:07,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 21:56:07,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 21:56:07,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-02-19 21:56:07,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-02-19 21:56:07,467 INFO L480 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-02-19 21:56:07,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 21:56:07,467 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-02-19 21:56:07,467 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-02-19 21:56:07,467 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 12 states. [2021-02-19 21:56:07,467 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-02-19 21:56:07,467 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-02-19 21:56:07,467 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-02-19 21:56:08,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 21:56:08,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 21:56:08,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 21:56:08,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 21:56:08,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 21:56:08,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 21:56:08,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-02-19 21:56:08,379 INFO L202 PluginConnector]: Adding new model two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 09:56:08 BasicIcfg [2021-02-19 21:56:08,379 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 21:56:08,380 INFO L168 Benchmark]: Toolchain (without parser) took 3862.84 ms. Allocated memory was 255.9 MB in the beginning and 415.2 MB in the end (delta: 159.4 MB). Free memory was 236.2 MB in the beginning and 286.0 MB in the end (delta: -49.7 MB). Peak memory consumption was 109.4 MB. Max. memory is 16.0 GB. [2021-02-19 21:56:08,380 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.4 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 21:56:08,380 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.70 ms. Allocated memory is still 255.9 MB. Free memory was 235.7 MB in the beginning and 234.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 21:56:08,380 INFO L168 Benchmark]: Boogie Preprocessor took 10.74 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 233.4 MB in the end (delta: 858.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 21:56:08,380 INFO L168 Benchmark]: RCFGBuilder took 195.97 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 236.0 MB in the end (delta: -2.6 MB). Peak memory consumption was 17.4 MB. Max. memory is 16.0 GB. [2021-02-19 21:56:08,380 INFO L168 Benchmark]: TraceAbstraction took 3632.00 ms. Allocated memory was 255.9 MB in the beginning and 415.2 MB in the end (delta: 159.4 MB). Free memory was 235.3 MB in the beginning and 286.0 MB in the end (delta: -50.7 MB). Peak memory consumption was 108.7 MB. Max. memory is 16.0 GB. [2021-02-19 21:56:08,381 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 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.4 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 17.70 ms. Allocated memory is still 255.9 MB. Free memory was 235.7 MB in the beginning and 234.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.74 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 233.4 MB in the end (delta: 858.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 195.97 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 236.0 MB in the end (delta: -2.6 MB). Peak memory consumption was 17.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 3632.00 ms. Allocated memory was 255.9 MB in the beginning and 415.2 MB in the end (delta: 159.4 MB). Free memory was 235.3 MB in the beginning and 286.0 MB in the end (delta: -50.7 MB). Peak memory consumption was 108.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 61]: 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 3 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.5s, OverallIterations: 6, TraceHistogramMax: 0, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=0occurred 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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 234 NumberOfCodeBlocks, 234 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 224 ConstructedInterpolants, 0 QuantifiedInterpolants, 31416 SizeOfPredicates, 15 NumberOfNonLiveVariables, 292 ConjunctsInSsa, 54 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 82/111 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...