/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-POR-Persistent-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-14 09:05:49,269 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-14 09:05:49,272 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-14 09:05:49,314 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-14 09:05:49,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-14 09:05:49,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-14 09:05:49,374 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-14 09:05:49,374 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-POR-Persistent-NoLbe.epf [2021-07-14 09:05:49,412 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-14 09:05:49,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-14 09:05:49,413 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-14 09:05:49,413 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-14 09:05:49,415 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-14 09:05:49,415 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-14 09:05:49,416 INFO L138 SettingsManager]: * Use SBE=true [2021-07-14 09:05:49,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-14 09:05:49,416 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-14 09:05:49,416 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-14 09:05:49,417 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-14 09:05:49,417 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-14 09:05:49,417 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-14 09:05:49,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-14 09:05:49,418 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-14 09:05:49,418 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-14 09:05:49,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-14 09:05:49,418 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-14 09:05:49,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-14 09:05:49,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-14 09:05:49,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-14 09:05:49,419 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-14 09:05:49,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-14 09:05:49,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-14 09:05:49,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-14 09:05:49,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-14 09:05:49,419 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-14 09:05:49,419 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-14 09:05:49,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-14 09:05:49,420 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-14 09:05:49,420 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2021-07-14 09:05:49,420 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-14 09:05:49,420 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SETS [2021-07-14 09:05:49,420 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-14 09:05:49,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-14 09:05:49,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-14 09:05:49,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-14 09:05:49,732 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-14 09:05:49,733 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-14 09:05:49,734 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl [2021-07-14 09:05:49,734 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl' [2021-07-14 09:05:49,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-14 09:05:49,758 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-14 09:05:49,759 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-14 09:05:49,759 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-14 09:05:49,759 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-14 09:05:49,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.07 09:05:49" (1/1) ... [2021-07-14 09:05:49,776 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.07 09:05:49" (1/1) ... [2021-07-14 09:05:49,783 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-14 09:05:49,785 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-14 09:05:49,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-14 09:05:49,785 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-14 09:05:49,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.07 09:05:49" (1/1) ... [2021-07-14 09:05:49,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.07 09:05:49" (1/1) ... [2021-07-14 09:05:49,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.07 09:05:49" (1/1) ... [2021-07-14 09:05:49,793 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.07 09:05:49" (1/1) ... [2021-07-14 09:05:49,795 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.07 09:05:49" (1/1) ... [2021-07-14 09:05:49,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.07 09:05:49" (1/1) ... [2021-07-14 09:05:49,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.07 09:05:49" (1/1) ... [2021-07-14 09:05:49,798 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-14 09:05:49,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-14 09:05:49,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-14 09:05:49,799 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-14 09:05:49,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.07 09:05:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-14 09:05:49,863 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-14 09:05:49,863 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-14 09:05:49,864 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-14 09:05:49,864 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-14 09:05:49,864 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-14 09:05:49,864 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-14 09:05:49,864 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-14 09:05:49,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-14 09:05:49,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-14 09:05:49,867 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-14 09:05:50,041 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-14 09:05:50,042 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-14 09:05:50,043 INFO L202 PluginConnector]: Adding new model nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 09:05:50 BoogieIcfgContainer [2021-07-14 09:05:50,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-14 09:05:50,045 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-14 09:05:50,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-14 09:05:50,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-14 09:05:50,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.07 09:05:49" (1/2) ... [2021-07-14 09:05:50,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cdcdad8 and model type nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 09:05:50, skipping insertion in model container [2021-07-14 09:05:50,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 09:05:50" (2/2) ... [2021-07-14 09:05:50,050 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-counter-alt2.wvr.bpl [2021-07-14 09:05:50,054 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-14 09:05:50,054 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-14 09:05:50,054 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-14 09:05:50,055 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-14 09:05:50,100 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-14 09:05:50,129 INFO L255 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 [2021-07-14 09:05:50,195 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-14 09:05:50,195 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-14 09:05:50,195 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-14 09:05:50,195 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-14 09:05:50,195 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-14 09:05:50,195 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-14 09:05:50,195 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-14 09:05:50,196 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-14 09:05:50,348 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-14 09:05:50,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-14 09:05:50,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1583978233, now seen corresponding path program 1 times [2021-07-14 09:05:50,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-14 09:05:50,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934849318] [2021-07-14 09:05:50,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-14 09:05:50,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 09:05:50,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 09:05:50,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-14 09:05:50,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934849318] [2021-07-14 09:05:50,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934849318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 09:05:50,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403871429] [2021-07-14 09:05:50,648 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 [2021-07-14 09:05:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 09:05:50,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-14 09:05:50,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-14 09:05:51,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 09:05:51,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403871429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 09:05:51,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-14 09:05:51,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-14 09:05:51,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054417572] [2021-07-14 09:05:51,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-14 09:05:51,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-14 09:05:51,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-14 09:05:51,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-14 09:05:51,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-14 09:05:51,029 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-07-14 09:05:51,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-14 09:05:51,031 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-07-14 09:05:51,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-14 09:05:51,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-07-14 09:05:51,349 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-14 09:05:51,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-14 09:05:51,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1935227519, now seen corresponding path program 2 times [2021-07-14 09:05:51,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-14 09:05:51,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533729290] [2021-07-14 09:05:51,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-14 09:05:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 09:05:51,539 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 09:05:51,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-14 09:05:51,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533729290] [2021-07-14 09:05:51,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533729290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 09:05:51,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162719639] [2021-07-14 09:05:51,540 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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-14 09:05:51,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-14 09:05:51,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-14 09:05:51,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-14 09:05:51,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-14 09:05:52,048 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 09:05:52,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162719639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 09:05:52,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-14 09:05:52,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-14 09:05:52,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860155822] [2021-07-14 09:05:52,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-14 09:05:52,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-14 09:05:52,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-14 09:05:52,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-07-14 09:05:52,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-14 09:05:52,052 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-07-14 09:05:52,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-14 09:05:52,052 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 9 states. [2021-07-14 09:05:52,052 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-07-14 09:05:52,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-14 09:05:52,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-14 09:05:52,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-14 09:05:52,921 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-14 09:05:52,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-14 09:05:52,921 INFO L82 PathProgramCache]: Analyzing trace with hash -327940485, now seen corresponding path program 3 times [2021-07-14 09:05:52,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-14 09:05:52,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396347597] [2021-07-14 09:05:52,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-14 09:05:52,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 09:05:53,117 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 09:05:53,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-14 09:05:53,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396347597] [2021-07-14 09:05:53,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396347597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 09:05:53,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198351522] [2021-07-14 09:05:53,118 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 [2021-07-14 09:05:53,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-14 09:05:53,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-14 09:05:53,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-14 09:05:53,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-14 09:05:53,687 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 09:05:53,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198351522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 09:05:53,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-14 09:05:53,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-14 09:05:53,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405526128] [2021-07-14 09:05:53,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-14 09:05:53,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-14 09:05:53,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-14 09:05:53,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-07-14 09:05:53,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-14 09:05:53,693 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-07-14 09:05:53,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-14 09:05:53,693 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 9 states. [2021-07-14 09:05:53,693 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 23 states. [2021-07-14 09:05:53,694 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-07-14 09:05:54,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-14 09:05:54,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-14 09:05:54,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-14 09:05:54,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-14 09:05:54,614 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-14 09:05:54,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-14 09:05:54,614 INFO L82 PathProgramCache]: Analyzing trace with hash 467047543, now seen corresponding path program 4 times [2021-07-14 09:05:54,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-14 09:05:54,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859439837] [2021-07-14 09:05:54,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-14 09:05:54,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 09:05:54,775 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 25 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 09:05:54,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-14 09:05:54,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859439837] [2021-07-14 09:05:54,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859439837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 09:05:54,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156253996] [2021-07-14 09:05:54,776 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-14 09:05:54,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-14 09:05:54,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-14 09:05:54,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-14 09:05:54,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown