/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/threaded-sum-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-98196c323137eee61a7c1131837b356358d783d4-98196c3 [2021-06-17 03:30:13,902 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-17 03:30:13,904 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-17 03:30:13,936 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-17 03:30:13,936 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-17 03:30:13,938 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-17 03:30:13,940 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-17 03:30:13,944 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-17 03:30:13,946 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-17 03:30:13,949 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-17 03:30:13,950 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-17 03:30:13,951 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-06-17 03:30:13,979 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-17 03:30:13,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-17 03:30:13,980 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-17 03:30:13,983 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 [2021-06-17 03:30:14,012 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-17 03:30:14,013 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-17 03:30:14,013 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-17 03:30:14,013 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-17 03:30:14,015 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-17 03:30:14,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-17 03:30:14,016 INFO L138 SettingsManager]: * Use SBE=true [2021-06-17 03:30:14,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-17 03:30:14,016 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-17 03:30:14,016 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-17 03:30:14,017 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-17 03:30:14,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-17 03:30:14,017 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-17 03:30:14,017 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-17 03:30:14,017 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-17 03:30:14,018 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-17 03:30:14,018 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-17 03:30:14,018 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-17 03:30:14,018 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-17 03:30:14,018 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-17 03:30:14,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-17 03:30:14,018 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-17 03:30:14,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-17 03:30:14,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-17 03:30:14,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-17 03:30:14,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-17 03:30:14,019 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-17 03:30:14,019 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-17 03:30:14,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-17 03:30:14,019 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-17 03:30:14,019 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2021-06-17 03:30:14,020 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-17 03:30:14,020 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SETS [2021-06-17 03:30:14,020 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-17 03:30:14,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-17 03:30:14,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-17 03:30:14,328 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-17 03:30:14,329 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-17 03:30:14,330 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-17 03:30:14,331 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/threaded-sum-3.wvr.bpl [2021-06-17 03:30:14,331 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/threaded-sum-3.wvr.bpl' [2021-06-17 03:30:14,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-17 03:30:14,348 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-17 03:30:14,350 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-17 03:30:14,350 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-17 03:30:14,350 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-17 03:30:14,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.06 03:30:14" (1/1) ... [2021-06-17 03:30:14,364 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.06 03:30:14" (1/1) ... [2021-06-17 03:30:14,370 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-17 03:30:14,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-17 03:30:14,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-17 03:30:14,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-17 03:30:14,377 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.06 03:30:14" (1/1) ... [2021-06-17 03:30:14,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.06 03:30:14" (1/1) ... [2021-06-17 03:30:14,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.06 03:30:14" (1/1) ... [2021-06-17 03:30:14,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.06 03:30:14" (1/1) ... [2021-06-17 03:30:14,381 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.06 03:30:14" (1/1) ... [2021-06-17 03:30:14,384 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.06 03:30:14" (1/1) ... [2021-06-17 03:30:14,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.06 03:30:14" (1/1) ... [2021-06-17 03:30:14,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-17 03:30:14,390 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-17 03:30:14,390 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-17 03:30:14,391 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-17 03:30:14,392 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.06 03:30:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-17 03:30:14,451 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-17 03:30:14,451 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-17 03:30:14,451 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-17 03:30:14,451 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-17 03:30:14,451 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-17 03:30:14,451 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-17 03:30:14,452 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-17 03:30:14,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-17 03:30:14,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-17 03:30:14,452 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-17 03:30:14,452 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-17 03:30:14,452 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-17 03:30:14,452 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-17 03:30:14,695 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-17 03:30:14,695 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-17 03:30:14,696 INFO L202 PluginConnector]: Adding new model threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.06 03:30:14 BoogieIcfgContainer [2021-06-17 03:30:14,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-17 03:30:14,698 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-17 03:30:14,698 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-17 03:30:14,700 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-17 03:30:14,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.06 03:30:14" (1/2) ... [2021-06-17 03:30:14,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@701d08e7 and model type threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.06 03:30:14, skipping insertion in model container [2021-06-17 03:30:14,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.06 03:30:14" (2/2) ... [2021-06-17 03:30:14,702 INFO L111 eAbstractionObserver]: Analyzing ICFG threaded-sum-3.wvr.bpl [2021-06-17 03:30:14,705 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-17 03:30:14,705 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-17 03:30:14,705 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-17 03:30:14,706 INFO L470 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-17 03:30:14,787 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-17 03:30:14,805 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 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 [2021-06-17 03:30:14,857 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 03:30:14,858 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 03:30:14,858 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 03:30:14,858 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 03:30:14,858 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 03:30:14,858 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 03:30:14,858 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 03:30:14,858 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-17 03:30:15,041 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 03:30:15,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 03:30:15,045 INFO L82 PathProgramCache]: Analyzing trace with hash 266096509, now seen corresponding path program 1 times [2021-06-17 03:30:15,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 03:30:15,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687408292] [2021-06-17 03:30:15,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 03:30:15,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 03:30:15,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-17 03:30:15,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 03:30:15,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687408292] [2021-06-17 03:30:15,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687408292] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 03:30:15,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 03:30:15,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 03:30:15,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604373198] [2021-06-17 03:30:15,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 03:30:15,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 03:30:15,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 03:30:15,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-17 03:30:15,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 03:30:15,165 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 03:30:15,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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) [2021-06-17 03:30:15,166 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 03:30:15,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 03:30:15,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-17 03:30:15,235 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 03:30:15,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 03:30:15,236 INFO L82 PathProgramCache]: Analyzing trace with hash -722729789, now seen corresponding path program 2 times [2021-06-17 03:30:15,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 03:30:15,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481582285] [2021-06-17 03:30:15,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 03:30:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 03:30:15,290 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-17 03:30:15,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 03:30:15,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481582285] [2021-06-17 03:30:15,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481582285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 03:30:15,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967286282] [2021-06-17 03:30:15,292 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 03:30:15,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-17 03:30:15,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-17 03:30:15,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-17 03:30:15,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-17 03:30:15,479 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-17 03:30:15,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967286282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 03:30:15,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-17 03:30:15,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-17 03:30:15,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294527025] [2021-06-17 03:30:15,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 03:30:15,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 03:30:15,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 03:30:15,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-17 03:30:15,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 03:30:15,481 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 03:30:15,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-17 03:30:15,482 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 03:30:15,482 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 03:30:15,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 03:30:15,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 03:30:15,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 03:30:15,761 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 03:30:15,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 03:30:15,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1584933565, now seen corresponding path program 3 times [2021-06-17 03:30:15,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 03:30:15,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701721271] [2021-06-17 03:30:15,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 03:30:15,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 03:30:16,876 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-17 03:30:16,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 03:30:16,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701721271] [2021-06-17 03:30:16,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701721271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 03:30:16,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405761117] [2021-06-17 03:30:16,877 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 03:30:16,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-17 03:30:16,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-17 03:30:16,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-17 03:30:16,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-17 03:30:17,648 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-06-17 03:30:17,940 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2021-06-17 03:30:18,179 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-17 03:30:18,657 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-06-17 03:30:18,712 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-17 03:30:18,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405761117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 03:30:18,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-17 03:30:18,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 35 [2021-06-17 03:30:18,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166611461] [2021-06-17 03:30:18,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-17 03:30:18,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 03:30:18,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-17 03:30:18,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1049, Unknown=0, NotChecked=0, Total=1260 [2021-06-17 03:30:18,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 03:30:18,718 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 03:30:18,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-17 03:30:18,718 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 03:30:18,718 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2021-06-17 03:30:18,719 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 03:30:19,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 03:30:19,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 03:30:19,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-17 03:30:19,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 03:30:19,318 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 03:30:19,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 03:30:19,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1958674534, now seen corresponding path program 4 times [2021-06-17 03:30:19,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 03:30:19,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874795254] [2021-06-17 03:30:19,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 03:30:19,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 03:30:19,355 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 60 proven. 1 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-06-17 03:30:19,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 03:30:19,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874795254] [2021-06-17 03:30:19,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874795254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 03:30:19,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076689341] [2021-06-17 03:30:19,356 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 03:30:19,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-17 03:30:19,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-17 03:30:19,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-17 03:30:19,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-17 03:30:19,475 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 60 proven. 1 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-06-17 03:30:19,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076689341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 03:30:19,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-17 03:30:19,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-17 03:30:19,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941117311] [2021-06-17 03:30:19,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 03:30:19,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 03:30:19,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 03:30:19,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-17 03:30:19,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 03:30:19,477 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 03:30:19,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-17 03:30:19,477 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 03:30:19,478 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2021-06-17 03:30:19,478 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 18 states. [2021-06-17 03:30:19,478 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 03:30:19,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 03:30:19,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 03:30:19,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-17 03:30:19,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 03:30:19,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 03:30:19,737 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 03:30:19,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 03:30:19,737 INFO L82 PathProgramCache]: Analyzing trace with hash 484905656, now seen corresponding path program 5 times [2021-06-17 03:30:19,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 03:30:19,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577070556] [2021-06-17 03:30:19,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 03:30:19,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 03:30:19,974 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 42 proven. 166 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-17 03:30:19,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 03:30:19,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577070556] [2021-06-17 03:30:19,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577070556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 03:30:19,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873066773] [2021-06-17 03:30:19,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 03:30:20,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-17 03:30:20,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-17 03:30:20,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-17 03:30:20,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-17 03:30:20,382 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 37 proven. 155 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-06-17 03:30:20,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873066773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 03:30:20,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-17 03:30:20,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 22 [2021-06-17 03:30:20,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106662760] [2021-06-17 03:30:20,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-17 03:30:20,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 03:30:20,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-17 03:30:20,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-06-17 03:30:20,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 03:30:20,388 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 03:30:20,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 22 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-17 03:30:20,388 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 03:30:20,388 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2021-06-17 03:30:20,388 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 18 states. [2021-06-17 03:30:20,388 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 03:30:20,388 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 03:30:20,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 03:30:20,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 03:30:20,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-17 03:30:20,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 03:30:20,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-17 03:30:20,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-17 03:30:20,877 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 03:30:20,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 03:30:20,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1201924474, now seen corresponding path program 6 times [2021-06-17 03:30:20,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 03:30:20,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709351337] [2021-06-17 03:30:20,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 03:30:20,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 03:30:20,917 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2021-06-17 03:30:20,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 03:30:20,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709351337] [2021-06-17 03:30:20,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709351337] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 03:30:20,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 03:30:20,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 03:30:20,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361904043] [2021-06-17 03:30:20,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 03:30:20,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 03:30:20,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 03:30:20,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 03:30:20,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 03:30:20,918 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 03:30:20,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-17 03:30:20,918 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 03:30:20,919 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2021-06-17 03:30:20,919 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 18 states. [2021-06-17 03:30:20,919 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 03:30:20,919 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-06-17 03:30:20,919 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 03:30:20,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 03:30:20,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 03:30:20,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-17 03:30:20,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 03:30:20,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-17 03:30:20,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 03:30:20,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-06-17 03:30:20,953 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 03:30:20,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 03:30:20,954 INFO L82 PathProgramCache]: Analyzing trace with hash -263626664, now seen corresponding path program 7 times [2021-06-17 03:30:20,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 03:30:20,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427579571] [2021-06-17 03:30:20,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 03:30:21,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 03:36:06,549 WARN L205 SmtUtils]: Spent 5.74 m on a formula simplification. DAG size of input: 111 DAG size of output: 53 [2021-06-17 03:43:30,339 WARN L205 SmtUtils]: Spent 7.39 m on a formula simplification. DAG size of input: 149 DAG size of output: 110 [2021-06-17 03:43:30,581 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 38 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown