/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-POR-DelaySleep-NoLbe-Random42.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/dot-product-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-06 16:50:45,157 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-06 16:50:45,158 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-06 16:50:45,184 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-06 16:50:45,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-06 16:50:45,191 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-06 16:50:45,191 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-06 16:50:45,192 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-06 16:50:45,193 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-06 16:50:45,193 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-06 16:50:45,194 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-06 16:50:45,195 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-06 16:50:45,196 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-06 16:50:45,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-06 16:50:45,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-06 16:50:45,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-06 16:50:45,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-06 16:50:45,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-06 16:50:45,211 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-06 16:50:45,212 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-06 16:50:45,219 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-DelaySleep-NoLbe-Random42.epf [2021-06-06 16:50:45,263 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-06 16:50:45,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-06 16:50:45,264 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-06 16:50:45,264 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-06 16:50:45,265 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-06 16:50:45,266 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-06 16:50:45,266 INFO L138 SettingsManager]: * Use SBE=true [2021-06-06 16:50:45,266 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-06 16:50:45,266 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-06 16:50:45,266 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-06 16:50:45,266 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-06 16:50:45,267 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-06 16:50:45,267 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-06 16:50:45,267 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-06 16:50:45,267 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-06 16:50:45,267 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-06 16:50:45,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-06 16:50:45,267 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-06 16:50:45,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-06 16:50:45,267 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-06 16:50:45,267 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-06 16:50:45,268 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-06 16:50:45,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-06 16:50:45,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-06 16:50:45,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-06 16:50:45,268 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-06 16:50:45,268 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-06 16:50:45,268 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-06 16:50:45,268 INFO L138 SettingsManager]: * DFS Order used in POR=RANDOM [2021-06-06 16:50:45,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-06 16:50:45,268 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-06 16:50:45,268 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2021-06-06 16:50:45,269 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-06 16:50:45,269 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-06-06 16:50:45,269 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-06-06 16:50:45,269 INFO L138 SettingsManager]: * Random seed used by POR DFS order=42 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-06 16:50:45,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-06 16:50:45,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-06 16:50:45,531 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-06 16:50:45,532 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-06 16:50:45,533 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-06 16:50:45,534 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/dot-product-alt.wvr.bpl [2021-06-06 16:50:45,534 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/dot-product-alt.wvr.bpl' [2021-06-06 16:50:45,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-06 16:50:45,556 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-06 16:50:45,557 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-06 16:50:45,557 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-06 16:50:45,557 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-06 16:50:45,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 04:50:45" (1/1) ... [2021-06-06 16:50:45,572 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 04:50:45" (1/1) ... [2021-06-06 16:50:45,577 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-06 16:50:45,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-06 16:50:45,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-06 16:50:45,578 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-06 16:50:45,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 04:50:45" (1/1) ... [2021-06-06 16:50:45,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 04:50:45" (1/1) ... [2021-06-06 16:50:45,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 04:50:45" (1/1) ... [2021-06-06 16:50:45,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 04:50:45" (1/1) ... [2021-06-06 16:50:45,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 04:50:45" (1/1) ... [2021-06-06 16:50:45,591 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 04:50:45" (1/1) ... [2021-06-06 16:50:45,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 04:50:45" (1/1) ... [2021-06-06 16:50:45,593 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-06 16:50:45,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-06 16:50:45,593 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-06 16:50:45,593 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-06 16:50:45,595 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 04:50:45" (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 [2021-06-06 16:50:45,653 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-06 16:50:45,653 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-06 16:50:45,653 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-06 16:50:45,653 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-06 16:50:45,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-06 16:50:45,654 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-06 16:50:45,654 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-06 16:50:45,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-06 16:50:45,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-06 16:50:45,654 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-06 16:50:45,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-06 16:50:45,654 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-06 16:50:45,655 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-06 16:50:45,839 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-06 16:50:45,840 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-06 16:50:45,841 INFO L202 PluginConnector]: Adding new model dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.06 04:50:45 BoogieIcfgContainer [2021-06-06 16:50:45,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-06 16:50:45,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-06 16:50:45,842 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-06 16:50:45,844 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-06 16:50:45,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 04:50:45" (1/2) ... [2021-06-06 16:50:45,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57555886 and model type dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.06 04:50:45, skipping insertion in model container [2021-06-06 16:50:45,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.06 04:50:45" (2/2) ... [2021-06-06 16:50:45,846 INFO L111 eAbstractionObserver]: Analyzing ICFG dot-product-alt.wvr.bpl [2021-06-06 16:50:45,849 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-06 16:50:45,849 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-06 16:50:45,849 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-06 16:50:45,850 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-06 16:50:45,906 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-06 16:50:45,920 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 [2021-06-06 16:50:45,955 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-06 16:50:45,956 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-06 16:50:45,956 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-06 16:50:45,956 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-06 16:50:45,956 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-06 16:50:45,956 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-06 16:50:45,956 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-06 16:50:45,956 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-06 16:50:46,058 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 16:50:46,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 16:50:46,065 INFO L82 PathProgramCache]: Analyzing trace with hash 572032538, now seen corresponding path program 1 times [2021-06-06 16:50:46,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 16:50:46,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202491470] [2021-06-06 16:50:46,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 16:50:46,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 16:50:46,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 16:50:46,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 16:50:46,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202491470] [2021-06-06 16:50:46,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202491470] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 16:50:46,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 16:50:46,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-06 16:50:46,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466602351] [2021-06-06 16:50:46,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-06 16:50:46,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 16:50:46,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-06 16:50:46,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-06 16:50:46,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-06 16:50:46,211 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-06 16:50:46,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2021-06-06 16:50:46,212 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-06 16:50:46,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-06 16:50:46,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-06 16:50:46,226 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 16:50:46,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 16:50:46,227 INFO L82 PathProgramCache]: Analyzing trace with hash -899165153, now seen corresponding path program 1 times [2021-06-06 16:50:46,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 16:50:46,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95118689] [2021-06-06 16:50:46,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 16:50:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 16:50:46,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 16:50:46,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 16:50:46,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95118689] [2021-06-06 16:50:46,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95118689] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 16:50:46,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 16:50:46,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-06 16:50:46,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222476511] [2021-06-06 16:50:46,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-06 16:50:46,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 16:50:46,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-06 16:50:46,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-06 16:50:46,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-06 16:50:46,260 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-06 16:50:46,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) [2021-06-06 16:50:46,260 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-06 16:50:46,260 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-06 16:50:46,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-06 16:50:46,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-06 16:50:46,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-06 16:50:46,303 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 16:50:46,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 16:50:46,303 INFO L82 PathProgramCache]: Analyzing trace with hash 447355472, now seen corresponding path program 1 times [2021-06-06 16:50:46,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 16:50:46,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888585755] [2021-06-06 16:50:46,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 16:50:46,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 16:50:46,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 16:50:46,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 16:50:46,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888585755] [2021-06-06 16:50:46,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888585755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 16:50:46,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650960111] [2021-06-06 16:50:46,635 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 [2021-06-06 16:50:46,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 16:50:46,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-06 16:50:46,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 16:50:46,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 16:50:46,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-06-06 16:50:46,911 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 16:50:46,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 16:50:46,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 16:50:46,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-06 16:50:46,924 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 16:50:46,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 16:50:46,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-06-06 16:50:46,934 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 16:50:46,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 16:50:46,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-06 16:50:46,944 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:29, output treesize:3 [2021-06-06 16:50:46,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 16:50:46,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650960111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 16:50:46,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 16:50:46,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 16:50:46,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525499638] [2021-06-06 16:50:46,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 16:50:46,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 16:50:46,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 16:50:46,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-06 16:50:46,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-06 16:50:46,997 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-06 16:50:46,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 16:50:46,997 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-06 16:50:46,997 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-06 16:50:46,997 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-06 16:50:47,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-06 16:50:47,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-06 16:50:47,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 16:50:47,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 16:50:47,372 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 16:50:47,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 16:50:47,372 INFO L82 PathProgramCache]: Analyzing trace with hash 977670293, now seen corresponding path program 2 times [2021-06-06 16:50:47,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 16:50:47,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364937465] [2021-06-06 16:50:47,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 16:50:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 16:50:47,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 16:50:47,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 16:50:47,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364937465] [2021-06-06 16:50:47,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364937465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 16:50:47,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392579284] [2021-06-06 16:50:47,423 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 [2021-06-06 16:50:47,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 16:50:47,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 16:50:47,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 16:50:47,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 16:50:47,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 16:50:47,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392579284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 16:50:47,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 16:50:47,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 16:50:47,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813194246] [2021-06-06 16:50:47,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 16:50:47,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 16:50:47,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 16:50:47,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-06 16:50:47,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-06 16:50:47,596 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-06 16:50:47,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 16:50:47,596 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-06 16:50:47,596 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-06 16:50:47,596 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 9 states. [2021-06-06 16:50:47,596 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-06 16:50:47,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-06 16:50:47,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-06 16:50:47,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 16:50:47,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 16:50:48,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 16:50:48,108 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 16:50:48,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 16:50:48,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1727197347, now seen corresponding path program 1 times [2021-06-06 16:50:48,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 16:50:48,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729264380] [2021-06-06 16:50:48,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 16:50:48,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 16:50:48,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 16:50:48,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 16:50:48,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729264380] [2021-06-06 16:50:48,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729264380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 16:50:48,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144027888] [2021-06-06 16:50:48,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 16:50:48,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 16:50:48,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 16:50:48,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 16:50:48,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 16:50:48,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 16:50:48,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-06 16:50:48,967 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 16:50:48,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 16:50:48,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 16:50:48,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 16:50:48,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-06 16:50:48,980 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 16:50:48,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 16:50:48,992 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 16:50:48,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-06 16:50:48,996 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 16:50:49,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 16:50:49,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-06 16:50:49,007 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-06 16:50:49,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 16:50:49,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144027888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 16:50:49,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 16:50:49,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-06-06 16:50:49,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432951529] [2021-06-06 16:50:49,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-06 16:50:49,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 16:50:49,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-06 16:50:49,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-06-06 16:50:49,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-06 16:50:49,030 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-06 16:50:49,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 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) [2021-06-06 16:50:49,030 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-06 16:50:49,031 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-06 16:50:49,031 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 9 states. [2021-06-06 16:50:49,031 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 18 states. [2021-06-06 16:50:49,031 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-06 16:50:49,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-06 16:50:49,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-06 16:50:49,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 16:50:49,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 16:50:49,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 16:50:49,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 16:50:49,804 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 16:50:49,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 16:50:49,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1318102659, now seen corresponding path program 2 times [2021-06-06 16:50:49,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 16:50:49,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011211358] [2021-06-06 16:50:49,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 16:50:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 16:50:49,878 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 16:50:49,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 16:50:49,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011211358] [2021-06-06 16:50:49,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011211358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 16:50:49,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532610024] [2021-06-06 16:50:49,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 16:50:49,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 16:50:49,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 16:50:49,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 16:50:49,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 16:50:50,053 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 16:50:50,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532610024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 16:50:50,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 16:50:50,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 16:50:50,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113599981] [2021-06-06 16:50:50,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 16:50:50,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 16:50:50,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 16:50:50,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-06 16:50:50,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-06 16:50:50,056 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-06 16:50:50,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 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) [2021-06-06 16:50:50,058 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-06 16:50:50,058 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-06 16:50:50,058 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 9 states. [2021-06-06 16:50:50,058 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 18 states. [2021-06-06 16:50:50,058 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-06-06 16:50:50,059 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-06 16:50:50,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-06 16:50:50,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-06 16:50:50,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 16:50:50,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 16:50:50,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 16:50:50,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 16:50:50,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-06-06 16:50:50,517 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 16:50:50,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 16:50:50,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1164940299, now seen corresponding path program 3 times [2021-06-06 16:50:50,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 16:50:50,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527161033] [2021-06-06 16:50:50,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 16:50:50,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 16:50:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 16:50:50,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 16:50:50,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527161033] [2021-06-06 16:50:50,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527161033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 16:50:50,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484150284] [2021-06-06 16:50:50,630 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 16:50:50,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 16:50:50,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 16:50:50,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 16:50:50,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 16:50:50,827 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 16:50:50,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484150284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 16:50:50,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 16:50:50,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-06 16:50:50,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101755385] [2021-06-06 16:50:50,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 16:50:50,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 16:50:50,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 16:50:50,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-06 16:50:50,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-06 16:50:50,828 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-06 16:50:50,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 16:50:50,828 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-06 16:50:50,828 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-06 16:50:50,829 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 9 states. [2021-06-06 16:50:50,829 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 18 states. [2021-06-06 16:50:50,829 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-06-06 16:50:50,829 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 17 states. [2021-06-06 16:50:50,829 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-06 16:50:51,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-06 16:50:51,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-06 16:50:51,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 16:50:51,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 16:50:51,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 16:50:51,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 16:50:51,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 16:50:51,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 16:50:51,469 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 16:50:51,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 16:50:51,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1275963069, now seen corresponding path program 4 times [2021-06-06 16:50:51,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 16:50:51,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130406335] [2021-06-06 16:50:51,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 16:50:51,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 16:50:52,015 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 16:50:52,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 16:50:52,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130406335] [2021-06-06 16:50:52,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130406335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 16:50:52,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896289577] [2021-06-06 16:50:52,015 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 16:50:52,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 16:50:52,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 16:50:52,049 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-06 16:50:52,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 16:50:59,348 WARN L205 SmtUtils]: Spent 959.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-06-06 16:51:00,362 WARN L205 SmtUtils]: Spent 961.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-06-06 16:51:03,332 WARN L205 SmtUtils]: Spent 990.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-06-06 16:51:04,365 WARN L205 SmtUtils]: Spent 965.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-06-06 16:51:04,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 16:51:04,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 16:51:04,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 63 [2021-06-06 16:51:04,401 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-06 16:51:04,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 16:51:04,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 16:51:04,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 16:51:04,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 47 [2021-06-06 16:51:04,425 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-06 16:51:04,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 16:51:04,462 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 16:51:04,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 87 [2021-06-06 16:51:14,714 WARN L205 SmtUtils]: Spent 3.67 s on a formula simplification. DAG size of input: 5504 DAG size of output: 5502 [2021-06-06 16:51:19,799 WARN L205 SmtUtils]: Spent 3.91 s on a formula simplification. DAG size of input: 5640 DAG size of output: 5591 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown