/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-NewStatesSleepPersistent-NoLbe-Lockstep.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-fun.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-14 13:25:36,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-14 13:25:36,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-14 13:25:36,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-14 13:25:36,523 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-NewStatesSleepPersistent-NoLbe-Lockstep.epf [2021-07-14 13:25:36,558 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-14 13:25:36,558 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-14 13:25:36,559 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-14 13:25:36,559 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-14 13:25:36,561 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-14 13:25:36,562 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-14 13:25:36,562 INFO L138 SettingsManager]: * Use SBE=true [2021-07-14 13:25:36,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-14 13:25:36,562 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-14 13:25:36,562 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-14 13:25:36,563 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-14 13:25:36,563 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-14 13:25:36,563 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-14 13:25:36,564 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-14 13:25:36,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-14 13:25:36,564 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-14 13:25:36,564 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-14 13:25:36,564 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-14 13:25:36,564 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-14 13:25:36,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-14 13:25:36,565 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-14 13:25:36,565 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-14 13:25:36,565 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-14 13:25:36,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-14 13:25:36,565 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-14 13:25:36,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-14 13:25:36,565 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-14 13:25:36,566 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-14 13:25:36,566 INFO L138 SettingsManager]: * DFS Order used in POR=PSEUDO_LOCKSTEP [2021-07-14 13:25:36,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-14 13:25:36,566 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-14 13:25:36,566 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2021-07-14 13:25:36,566 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-14 13:25:36,567 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES [2021-07-14 13:25:36,567 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-14 13:25:36,866 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-14 13:25:36,892 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-14 13:25:36,894 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-14 13:25:36,895 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-14 13:25:36,896 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-14 13:25:36,897 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-fun.wvr.bpl [2021-07-14 13:25:36,897 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-fun.wvr.bpl' [2021-07-14 13:25:36,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-14 13:25:36,936 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-14 13:25:36,937 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-14 13:25:36,937 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-14 13:25:36,938 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-14 13:25:36,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.07 01:25:36" (1/1) ... [2021-07-14 13:25:36,957 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.07 01:25:36" (1/1) ... [2021-07-14 13:25:36,963 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-14 13:25:36,965 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-14 13:25:36,965 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-14 13:25:36,965 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-14 13:25:36,971 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.07 01:25:36" (1/1) ... [2021-07-14 13:25:36,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.07 01:25:36" (1/1) ... [2021-07-14 13:25:36,972 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.07 01:25:36" (1/1) ... [2021-07-14 13:25:36,972 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.07 01:25:36" (1/1) ... [2021-07-14 13:25:36,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.07 01:25:36" (1/1) ... [2021-07-14 13:25:36,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.07 01:25:36" (1/1) ... [2021-07-14 13:25:36,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.07 01:25:36" (1/1) ... [2021-07-14 13:25:36,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-14 13:25:36,978 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-14 13:25:36,978 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-14 13:25:36,978 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-14 13:25:36,979 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.07 01:25:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-14 13:25:37,032 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-14 13:25:37,032 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-14 13:25:37,032 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-14 13:25:37,033 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-14 13:25:37,033 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-14 13:25:37,033 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-14 13:25:37,033 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-14 13:25:37,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-14 13:25:37,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-14 13:25:37,034 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-14 13:25:37,228 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-14 13:25:37,228 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-14 13:25:37,244 INFO L202 PluginConnector]: Adding new model counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 01:25:37 BoogieIcfgContainer [2021-07-14 13:25:37,245 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-14 13:25:37,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-14 13:25:37,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-14 13:25:37,249 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-14 13:25:37,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.07 01:25:36" (1/2) ... [2021-07-14 13:25:37,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1644ef15 and model type counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 01:25:37, skipping insertion in model container [2021-07-14 13:25:37,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 01:25:37" (2/2) ... [2021-07-14 13:25:37,251 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-fun.wvr.bpl [2021-07-14 13:25:37,255 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-14 13:25:37,255 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-14 13:25:37,255 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-14 13:25:37,256 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-14 13:25:37,317 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-14 13:25:37,336 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-07-14 13:25:37,386 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-14 13:25:37,386 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-14 13:25:37,386 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-14 13:25:37,386 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-14 13:25:37,386 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-14 13:25:37,386 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-14 13:25:37,387 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-14 13:25:37,387 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-14 13:25:37,524 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-14 13:25:37,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-14 13:25:37,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1609088188, now seen corresponding path program 1 times [2021-07-14 13:25:37,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-14 13:25:37,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188650573] [2021-07-14 13:25:37,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-14 13:25:37,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 13:25:37,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-14 13:25:37,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-14 13:25:37,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188650573] [2021-07-14 13:25:37,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188650573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 13:25:37,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425396383] [2021-07-14 13:25:37,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-14 13:25:37,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 13:25:37,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-14 13:25:37,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-14 13:25:37,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-14 13:25:37,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-14 13:25:37,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 13:25:37,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-14 13:25:37,848 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-07-14 13:25:37,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-14 13:25:37,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-14 13:25:37,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 13:25:37,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-14 13:25:37,871 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-14 13:25:37,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-14 13:25:37,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425396383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 13:25:37,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-14 13:25:37,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-14 13:25:37,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957393021] [2021-07-14 13:25:37,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-14 13:25:37,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-14 13:25:37,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-14 13:25:37,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-14 13:25:37,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-14 13:25:37,906 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-07-14 13:25:37,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-07-14 13:25:37,907 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-07-14 13:25:37,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-14 13:25:38,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-07-14 13:25:38,145 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-14 13:25:38,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-14 13:25:38,146 INFO L82 PathProgramCache]: Analyzing trace with hash -613991360, now seen corresponding path program 2 times [2021-07-14 13:25:38,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-14 13:25:38,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881348702] [2021-07-14 13:25:38,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-14 13:25:38,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 13:25:38,318 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 13:25:38,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-14 13:25:38,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881348702] [2021-07-14 13:25:38,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881348702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 13:25:38,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849773778] [2021-07-14 13:25:38,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-14 13:25:38,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-14 13:25:38,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-14 13:25:38,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-14 13:25:38,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-14 13:25:38,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 13:25:38,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849773778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 13:25:38,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-14 13:25:38,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-14 13:25:38,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379856422] [2021-07-14 13:25:38,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-14 13:25:38,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-14 13:25:38,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-14 13:25:38,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-14 13:25:38,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-14 13:25:38,615 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-07-14 13:25:38,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-14 13:25:38,615 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-07-14 13:25:38,615 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-07-14 13:25:38,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-14 13:25:38,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-14 13:25:39,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-14 13:25:39,145 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-14 13:25:39,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-14 13:25:39,146 INFO L82 PathProgramCache]: Analyzing trace with hash -60420164, now seen corresponding path program 3 times [2021-07-14 13:25:39,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-14 13:25:39,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807875502] [2021-07-14 13:25:39,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-14 13:25:39,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 13:25:39,232 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-14 13:25:39,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-14 13:25:39,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807875502] [2021-07-14 13:25:39,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807875502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 13:25:39,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867392258] [2021-07-14 13:25:39,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-14 13:25:39,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-14 13:25:39,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-14 13:25:39,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-14 13:25:39,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-14 13:25:39,431 INFO L446 ElimStorePlain]: Different costs {6=[f], 10=[f_inv]} [2021-07-14 13:25:39,456 INFO L354 Elim1Store]: treesize reduction 32, result has 34.7 percent of original size [2021-07-14 13:25:39,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 63 [2021-07-14 13:25:39,544 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-14 13:25:39,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 13:25:39,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 13:25:39,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 53 [2021-07-14 13:25:39,610 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-14 13:25:39,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 13:25:39,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-14 13:25:39,612 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:76, output treesize:3 [2021-07-14 13:25:39,622 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-14 13:25:39,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867392258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 13:25:39,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-14 13:25:39,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-07-14 13:25:39,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182470011] [2021-07-14 13:25:39,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-14 13:25:39,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-14 13:25:39,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-14 13:25:39,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-14 13:25:39,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-14 13:25:39,625 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-07-14 13:25:39,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-14 13:25:39,625 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-07-14 13:25:39,625 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 12 states. [2021-07-14 13:25:39,625 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-07-14 13:25:39,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-14 13:25:39,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-14 13:25:39,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-14 13:25:40,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-14 13:25:40,014 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-14 13:25:40,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-14 13:25:40,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1575162828, now seen corresponding path program 4 times [2021-07-14 13:25:40,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-14 13:25:40,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517944435] [2021-07-14 13:25:40,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-14 13:25:40,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 13:25:40,158 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-14 13:25:40,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-14 13:25:40,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517944435] [2021-07-14 13:25:40,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517944435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 13:25:40,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198186467] [2021-07-14 13:25:40,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-14 13:25:40,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-14 13:25:40,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-14 13:25:40,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-14 13:25:40,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-14 13:25:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 13:25:40,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198186467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 13:25:40,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-14 13:25:40,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-14 13:25:40,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767008920] [2021-07-14 13:25:40,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-14 13:25:40,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-14 13:25:40,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-14 13:25:40,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-07-14 13:25:40,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-14 13:25:40,542 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-07-14 13:25:40,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 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) [2021-07-14 13:25:40,543 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-07-14 13:25:40,543 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 15 states. [2021-07-14 13:25:40,543 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-07-14 13:25:40,543 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-07-14 13:25:41,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-14 13:25:41,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-14 13:25:41,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-14 13:25:41,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-14 13:25:41,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-14 13:25:41,461 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-14 13:25:41,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-14 13:25:41,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1689864560, now seen corresponding path program 5 times [2021-07-14 13:25:41,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-14 13:25:41,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514898405] [2021-07-14 13:25:41,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-14 13:25:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 13:25:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-14 13:25:41,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-14 13:25:41,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514898405] [2021-07-14 13:25:41,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514898405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 13:25:41,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863056576] [2021-07-14 13:25:41,565 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 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 [2021-07-14 13:25:41,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-14 13:25:41,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-14 13:25:41,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-14 13:25:41,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-14 13:25:41,838 INFO L354 Elim1Store]: treesize reduction 48, result has 60.3 percent of original size [2021-07-14 13:25:41,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 118 treesize of output 121 [2021-07-14 13:25:41,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-14 13:25:41,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 13:25:41,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-14 13:25:41,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:118, output treesize:276 [2021-07-14 13:25:42,752 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2021-07-14 13:25:42,967 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 181 [2021-07-14 13:25:43,519 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 324 [2021-07-14 13:25:45,470 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 324 DAG size of output: 48 [2021-07-14 13:25:46,529 INFO L354 Elim1Store]: treesize reduction 118, result has 2.5 percent of original size [2021-07-14 13:25:46,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 146 treesize of output 58 [2021-07-14 13:25:46,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-14 13:25:46,675 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 84 [2021-07-14 13:25:46,676 INFO L628 ElimStorePlain]: treesize reduction 444, result has 43.1 percent of original size [2021-07-14 13:25:46,737 INFO L354 Elim1Store]: treesize reduction 81, result has 33.1 percent of original size [2021-07-14 13:25:46,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 68 [2021-07-14 13:25:46,742 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-14 13:25:46,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 13:25:46,806 INFO L354 Elim1Store]: treesize reduction 111, result has 8.3 percent of original size [2021-07-14 13:25:46,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 75 treesize of output 41 [2021-07-14 13:25:46,809 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-14 13:25:46,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 13:25:46,873 INFO L354 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2021-07-14 13:25:46,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 59 treesize of output 40 [2021-07-14 13:25:46,874 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-14 13:25:46,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 13:25:46,976 INFO L354 Elim1Store]: treesize reduction 60, result has 50.4 percent of original size [2021-07-14 13:25:46,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 81 treesize of output 102 [2021-07-14 13:25:46,989 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-14 13:25:46,998 INFO L628 ElimStorePlain]: treesize reduction 92, result has 3.2 percent of original size [2021-07-14 13:25:46,998 INFO L518 ElimStorePlain]: Eliminatee v_prenex_15 vanished before elimination [2021-07-14 13:25:46,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-14 13:25:46,999 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:920, output treesize:3 [2021-07-14 13:25:47,009 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-14 13:25:47,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863056576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 13:25:47,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-14 13:25:47,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 20 [2021-07-14 13:25:47,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460022556] [2021-07-14 13:25:47,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-14 13:25:47,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-14 13:25:47,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-14 13:25:47,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-07-14 13:25:47,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-14 13:25:47,011 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-07-14 13:25:47,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-14 13:25:47,011 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-07-14 13:25:47,011 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 15 states. [2021-07-14 13:25:47,011 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-07-14 13:25:47,011 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 27 states. [2021-07-14 13:25:47,011 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-07-14 13:25:47,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-14 13:25:47,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-14 13:25:47,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-14 13:25:47,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-14 13:25:47,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-14 13:25:47,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-14 13:25:47,477 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-14 13:25:47,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-14 13:25:47,477 INFO L82 PathProgramCache]: Analyzing trace with hash 991463146, now seen corresponding path program 6 times [2021-07-14 13:25:47,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-14 13:25:47,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805847516] [2021-07-14 13:25:47,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-14 13:25:47,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 13:25:47,699 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 63 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-14 13:25:47,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-14 13:25:47,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805847516] [2021-07-14 13:25:47,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805847516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 13:25:47,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126637830] [2021-07-14 13:25:47,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-14 13:25:47,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-14 13:25:47,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-14 13:25:47,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-14 13:25:47,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-14 13:25:48,181 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 49 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 13:25:48,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126637830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 13:25:48,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-14 13:25:48,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-07-14 13:25:48,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384401168] [2021-07-14 13:25:48,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-14 13:25:48,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-14 13:25:48,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-14 13:25:48,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1038, Unknown=0, NotChecked=0, Total=1260 [2021-07-14 13:25:48,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-14 13:25:48,184 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-07-14 13:25:48,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-14 13:25:48,184 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-07-14 13:25:48,184 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 15 states. [2021-07-14 13:25:48,184 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-07-14 13:25:48,184 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 27 states. [2021-07-14 13:25:48,184 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 10 states. [2021-07-14 13:25:48,184 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-07-14 13:25:49,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-14 13:25:49,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-14 13:25:49,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-14 13:25:49,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-14 13:25:49,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-14 13:25:49,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-14 13:25:49,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-14 13:25:49,404 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-14 13:25:49,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-14 13:25:49,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1060887260, now seen corresponding path program 7 times [2021-07-14 13:25:49,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-14 13:25:49,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555943119] [2021-07-14 13:25:49,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-14 13:25:49,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 13:25:49,535 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-14 13:25:49,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-14 13:25:49,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555943119] [2021-07-14 13:25:49,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555943119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 13:25:49,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373230432] [2021-07-14 13:25:49,536 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-14 13:25:49,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 13:25:49,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-14 13:25:49,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-14 13:25:50,048 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 99 [2021-07-14 13:25:50,049 INFO L354 Elim1Store]: treesize reduction 128, result has 55.7 percent of original size [2021-07-14 13:25:50,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 229 treesize of output 233 [2021-07-14 13:25:50,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-14 13:25:50,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 13:25:50,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-14 13:25:50,177 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:229, output treesize:878 [2021-07-14 13:25:50,330 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-07-14 13:26:50,716 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 20 [2021-07-14 13:26:51,216 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 14400 conjuctions. This might take some time... [2021-07-14 13:27:12,367 INFO L193 XnfTransformerHelper]: Simplified to disjunction of 14400 conjuctions. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown