/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-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 19:48:27,763 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 19:48:27,765 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 19:48:27,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-12 19:48:27,809 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-12 19:48:27,812 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-12 19:48:27,814 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-12 19:48:27,821 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-12 19:48:27,823 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-12 19:48:27,828 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-12 19:48:27,828 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-12 19:48:27,830 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-12 19:48:27,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-12 19:48:27,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-12 19:48:27,843 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-12 19:48:27,844 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-12 19:48:27,847 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-12 19:48:27,848 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-12 19:48:27,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-12 19:48:27,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-12 19:48:27,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-12 19:48:27,858 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-12 19:48:27,859 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-12 19:48:27,861 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-12 19:48:27,864 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-12 19:48:27,864 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-12 19:48:27,864 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-12 19:48:27,865 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-12 19:48:27,866 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-12 19:48:27,866 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-12 19:48:27,867 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-12 19:48:27,867 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-12 19:48:27,869 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-12 19:48:27,869 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-12 19:48:27,872 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-12 19:48:27,872 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-12 19:48:27,873 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-12 19:48:27,873 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-12 19:48:27,873 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-12 19:48:27,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-12 19:48:27,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-12 19:48:27,878 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-FA-NoLbe.epf [2021-06-12 19:48:27,912 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 19:48:27,912 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 19:48:27,913 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 19:48:27,913 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 19:48:27,915 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 19:48:27,915 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 19:48:27,916 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 19:48:27,916 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 19:48:27,916 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 19:48:27,916 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 19:48:27,917 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 19:48:27,917 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 19:48:27,917 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 19:48:27,917 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 19:48:27,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 19:48:27,918 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 19:48:27,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 19:48:27,918 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 19:48:27,918 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 19:48:27,918 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 19:48:27,918 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 19:48:27,919 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 19:48:27,919 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 19:48:27,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 19:48:27,919 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 19:48:27,919 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 19:48:27,919 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 19:48:27,919 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 19:48:27,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 19:48:27,920 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 19:48:27,920 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 19:48:27,920 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 19:48:28,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 19:48:28,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 19:48:28,209 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 19:48:28,210 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 19:48:28,211 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 19:48:28,211 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3.wvr.bpl [2021-06-12 19:48:28,212 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3.wvr.bpl' [2021-06-12 19:48:28,248 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 19:48:28,249 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 19:48:28,250 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 19:48:28,251 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 19:48:28,251 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 19:48:28,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:48:28" (1/1) ... [2021-06-12 19:48:28,266 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:48:28" (1/1) ... [2021-06-12 19:48:28,272 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 19:48:28,274 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 19:48:28,274 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 19:48:28,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 19:48:28,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:48:28" (1/1) ... [2021-06-12 19:48:28,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:48:28" (1/1) ... [2021-06-12 19:48:28,280 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:48:28" (1/1) ... [2021-06-12 19:48:28,280 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:48:28" (1/1) ... [2021-06-12 19:48:28,284 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:48:28" (1/1) ... [2021-06-12 19:48:28,287 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:48:28" (1/1) ... [2021-06-12 19:48:28,287 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:48:28" (1/1) ... [2021-06-12 19:48:28,288 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 19:48:28,289 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 19:48:28,289 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 19:48:28,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 19:48:28,291 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:48:28" (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 [2021-06-12 19:48:28,340 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 19:48:28,340 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 19:48:28,340 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 19:48:28,340 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 19:48:28,341 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 19:48:28,341 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 19:48:28,341 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 19:48:28,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 19:48:28,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 19:48:28,341 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 19:48:28,341 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 19:48:28,341 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 19:48:28,341 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-12 19:48:28,342 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-12 19:48:28,342 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-12 19:48:28,342 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-06-12 19:48:28,342 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-06-12 19:48:28,342 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-06-12 19:48:28,342 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-06-12 19:48:28,342 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-06-12 19:48:28,342 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-06-12 19:48:28,343 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 19:48:28,506 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 19:48:28,506 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 19:48:28,507 INFO L202 PluginConnector]: Adding new model exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 07:48:28 BoogieIcfgContainer [2021-06-12 19:48:28,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 19:48:28,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 19:48:28,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 19:48:28,511 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 19:48:28,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:48:28" (1/2) ... [2021-06-12 19:48:28,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f33f74 and model type exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 07:48:28, skipping insertion in model container [2021-06-12 19:48:28,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 07:48:28" (2/2) ... [2021-06-12 19:48:28,514 INFO L111 eAbstractionObserver]: Analyzing ICFG exp3x3.wvr.bpl [2021-06-12 19:48:28,518 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 19:48:28,518 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 19:48:28,518 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 19:48:28,519 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 19:48:28,616 INFO L149 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2021-06-12 19:48:28,633 INFO L255 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-06-12 19:48:28,651 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 19:48:28,651 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 19:48:28,651 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 19:48:28,651 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 19:48:28,651 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 19:48:28,652 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 19:48:28,652 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 19:48:28,652 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 19:48:28,660 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 60 places, 47 transitions, 142 flow [2021-06-12 19:48:29,343 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 6831 states, 6829 states have (on average 5.865426856055059) internal successors, (40055), 6830 states have internal predecessors, (40055), 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) [2021-06-12 19:48:29,390 INFO L276 IsEmpty]: Start isEmpty. Operand has 6831 states, 6829 states have (on average 5.865426856055059) internal successors, (40055), 6830 states have internal predecessors, (40055), 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) [2021-06-12 19:48:29,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 19:48:29,460 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:29,461 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:29,462 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:29,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:29,470 INFO L82 PathProgramCache]: Analyzing trace with hash -857197690, now seen corresponding path program 1 times [2021-06-12 19:48:29,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:29,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860199186] [2021-06-12 19:48:29,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:29,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:48:29,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:29,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860199186] [2021-06-12 19:48:29,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860199186] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:48:29,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:48:29,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 19:48:29,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561501723] [2021-06-12 19:48:29,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 19:48:29,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:29,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 19:48:29,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 19:48:29,768 INFO L87 Difference]: Start difference. First operand has 6831 states, 6829 states have (on average 5.865426856055059) internal successors, (40055), 6830 states have internal predecessors, (40055), 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) Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:30,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:30,106 INFO L93 Difference]: Finished difference Result 13654 states and 80102 transitions. [2021-06-12 19:48:30,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 19:48:30,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 19:48:30,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:30,371 INFO L225 Difference]: With dead ends: 13654 [2021-06-12 19:48:30,371 INFO L226 Difference]: Without dead ends: 13527 [2021-06-12 19:48:30,373 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 19:48:30,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13527 states. [2021-06-12 19:48:31,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13527 to 8158. [2021-06-12 19:48:31,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8158 states, 8157 states have (on average 5.851538555841609) internal successors, (47731), 8157 states have internal predecessors, (47731), 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) [2021-06-12 19:48:31,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8158 states to 8158 states and 47731 transitions. [2021-06-12 19:48:31,244 INFO L78 Accepts]: Start accepts. Automaton has 8158 states and 47731 transitions. Word has length 27 [2021-06-12 19:48:31,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:31,254 INFO L482 AbstractCegarLoop]: Abstraction has 8158 states and 47731 transitions. [2021-06-12 19:48:31,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:31,255 INFO L276 IsEmpty]: Start isEmpty. Operand 8158 states and 47731 transitions. [2021-06-12 19:48:31,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 19:48:31,305 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:31,306 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:31,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 19:48:31,306 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:31,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:31,309 INFO L82 PathProgramCache]: Analyzing trace with hash 825785348, now seen corresponding path program 1 times [2021-06-12 19:48:31,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:31,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505757031] [2021-06-12 19:48:31,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:31,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:31,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:48:31,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:31,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505757031] [2021-06-12 19:48:31,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505757031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:31,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259507687] [2021-06-12 19:48:31,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:48:31,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:31,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-12 19:48:31,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:48:31,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:48:31,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259507687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:31,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:48:31,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-12 19:48:31,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478515411] [2021-06-12 19:48:31,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 19:48:31,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:31,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 19:48:31,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:48:31,674 INFO L87 Difference]: Start difference. First operand 8158 states and 47731 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:32,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:32,242 INFO L93 Difference]: Finished difference Result 21114 states and 121111 transitions. [2021-06-12 19:48:32,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 19:48:32,244 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 19:48:32,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:32,649 INFO L225 Difference]: With dead ends: 21114 [2021-06-12 19:48:32,649 INFO L226 Difference]: Without dead ends: 21114 [2021-06-12 19:48:32,650 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:48:32,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21114 states. [2021-06-12 19:48:33,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21114 to 10411. [2021-06-12 19:48:33,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10411 states, 10410 states have (on average 5.94447646493756) internal successors, (61882), 10410 states have internal predecessors, (61882), 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) [2021-06-12 19:48:33,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10411 states to 10411 states and 61882 transitions. [2021-06-12 19:48:33,512 INFO L78 Accepts]: Start accepts. Automaton has 10411 states and 61882 transitions. Word has length 29 [2021-06-12 19:48:33,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:33,512 INFO L482 AbstractCegarLoop]: Abstraction has 10411 states and 61882 transitions. [2021-06-12 19:48:33,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:33,512 INFO L276 IsEmpty]: Start isEmpty. Operand 10411 states and 61882 transitions. [2021-06-12 19:48:33,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 19:48:33,556 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:33,556 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:33,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-12 19:48:33,772 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:33,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:33,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1262307080, now seen corresponding path program 1 times [2021-06-12 19:48:33,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:33,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106106594] [2021-06-12 19:48:33,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:33,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:33,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:48:33,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:33,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106106594] [2021-06-12 19:48:33,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106106594] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:48:33,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:48:33,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 19:48:33,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345097848] [2021-06-12 19:48:33,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:48:33,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:33,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:48:33,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:48:33,822 INFO L87 Difference]: Start difference. First operand 10411 states and 61882 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) [2021-06-12 19:48:34,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:34,121 INFO L93 Difference]: Finished difference Result 14973 states and 85568 transitions. [2021-06-12 19:48:34,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 19:48:34,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) Word has length 29 [2021-06-12 19:48:34,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:34,205 INFO L225 Difference]: With dead ends: 14973 [2021-06-12 19:48:34,205 INFO L226 Difference]: Without dead ends: 14893 [2021-06-12 19:48:34,206 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:48:34,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14893 states. [2021-06-12 19:48:34,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14893 to 11995. [2021-06-12 19:48:34,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11995 states, 11994 states have (on average 5.837335334333834) internal successors, (70013), 11994 states have internal predecessors, (70013), 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) [2021-06-12 19:48:34,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11995 states to 11995 states and 70013 transitions. [2021-06-12 19:48:34,949 INFO L78 Accepts]: Start accepts. Automaton has 11995 states and 70013 transitions. Word has length 29 [2021-06-12 19:48:34,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:34,949 INFO L482 AbstractCegarLoop]: Abstraction has 11995 states and 70013 transitions. [2021-06-12 19:48:34,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) [2021-06-12 19:48:34,949 INFO L276 IsEmpty]: Start isEmpty. Operand 11995 states and 70013 transitions. [2021-06-12 19:48:34,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 19:48:34,993 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:34,993 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:34,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 19:48:34,994 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:34,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:34,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1768142840, now seen corresponding path program 1 times [2021-06-12 19:48:34,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:34,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929063701] [2021-06-12 19:48:34,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:35,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:35,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:48:35,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:35,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929063701] [2021-06-12 19:48:35,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929063701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:35,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356141939] [2021-06-12 19:48:35,024 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 [2021-06-12 19:48:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:35,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-12 19:48:35,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:48:35,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:48:35,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356141939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:35,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:48:35,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-12 19:48:35,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333444629] [2021-06-12 19:48:35,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:48:35,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:35,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:48:35,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:48:35,129 INFO L87 Difference]: Start difference. First operand 11995 states and 70013 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) [2021-06-12 19:48:35,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:35,618 INFO L93 Difference]: Finished difference Result 30637 states and 176852 transitions. [2021-06-12 19:48:35,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:48:35,618 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) Word has length 29 [2021-06-12 19:48:35,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:35,818 INFO L225 Difference]: With dead ends: 30637 [2021-06-12 19:48:35,818 INFO L226 Difference]: Without dead ends: 30637 [2021-06-12 19:48:35,819 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:48:35,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30637 states. [2021-06-12 19:48:36,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30637 to 15205. [2021-06-12 19:48:36,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15205 states, 15204 states have (on average 5.956393054459353) internal successors, (90561), 15204 states have internal predecessors, (90561), 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) [2021-06-12 19:48:36,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15205 states to 15205 states and 90561 transitions. [2021-06-12 19:48:36,849 INFO L78 Accepts]: Start accepts. Automaton has 15205 states and 90561 transitions. Word has length 29 [2021-06-12 19:48:36,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:36,850 INFO L482 AbstractCegarLoop]: Abstraction has 15205 states and 90561 transitions. [2021-06-12 19:48:36,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) [2021-06-12 19:48:36,850 INFO L276 IsEmpty]: Start isEmpty. Operand 15205 states and 90561 transitions. [2021-06-12 19:48:36,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 19:48:36,907 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:36,907 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:37,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:48:37,131 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:37,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:37,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1844891750, now seen corresponding path program 1 times [2021-06-12 19:48:37,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:37,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86948931] [2021-06-12 19:48:37,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:37,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:48:37,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:37,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86948931] [2021-06-12 19:48:37,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86948931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:37,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090117818] [2021-06-12 19:48:37,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-12 19:48:37,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:37,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-12 19:48:37,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:48:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:48:37,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090117818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:37,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:48:37,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-12 19:48:37,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473418441] [2021-06-12 19:48:37,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:48:37,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:37,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:48:37,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:48:37,294 INFO L87 Difference]: Start difference. First operand 15205 states and 90561 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) [2021-06-12 19:48:37,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:37,770 INFO L93 Difference]: Finished difference Result 36877 states and 218066 transitions. [2021-06-12 19:48:37,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:48:37,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) Word has length 29 [2021-06-12 19:48:37,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:37,930 INFO L225 Difference]: With dead ends: 36877 [2021-06-12 19:48:37,930 INFO L226 Difference]: Without dead ends: 36877 [2021-06-12 19:48:37,931 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:48:38,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36877 states. [2021-06-12 19:48:38,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36877 to 20146. [2021-06-12 19:48:39,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20146 states, 20145 states have (on average 6.068304790270538) internal successors, (122246), 20145 states have internal predecessors, (122246), 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) [2021-06-12 19:48:39,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20146 states to 20146 states and 122246 transitions. [2021-06-12 19:48:39,111 INFO L78 Accepts]: Start accepts. Automaton has 20146 states and 122246 transitions. Word has length 29 [2021-06-12 19:48:39,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:39,111 INFO L482 AbstractCegarLoop]: Abstraction has 20146 states and 122246 transitions. [2021-06-12 19:48:39,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) [2021-06-12 19:48:39,111 INFO L276 IsEmpty]: Start isEmpty. Operand 20146 states and 122246 transitions. [2021-06-12 19:48:39,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 19:48:39,164 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:39,164 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:39,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:48:39,366 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:39,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:39,366 INFO L82 PathProgramCache]: Analyzing trace with hash 415252998, now seen corresponding path program 1 times [2021-06-12 19:48:39,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:39,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726279378] [2021-06-12 19:48:39,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:39,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:39,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:48:39,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:39,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726279378] [2021-06-12 19:48:39,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726279378] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:48:39,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:48:39,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 19:48:39,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849370675] [2021-06-12 19:48:39,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:48:39,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:39,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:48:39,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:48:39,414 INFO L87 Difference]: Start difference. First operand 20146 states and 122246 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) [2021-06-12 19:48:39,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:39,988 INFO L93 Difference]: Finished difference Result 31288 states and 185448 transitions. [2021-06-12 19:48:39,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:48:39,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) Word has length 29 [2021-06-12 19:48:39,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:40,122 INFO L225 Difference]: With dead ends: 31288 [2021-06-12 19:48:40,123 INFO L226 Difference]: Without dead ends: 31121 [2021-06-12 19:48:40,123 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:48:40,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31121 states. [2021-06-12 19:48:41,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31121 to 21451. [2021-06-12 19:48:41,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21451 states, 21450 states have (on average 6.020652680652681) internal successors, (129143), 21450 states have internal predecessors, (129143), 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) [2021-06-12 19:48:41,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21451 states to 21451 states and 129143 transitions. [2021-06-12 19:48:41,242 INFO L78 Accepts]: Start accepts. Automaton has 21451 states and 129143 transitions. Word has length 29 [2021-06-12 19:48:41,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:41,242 INFO L482 AbstractCegarLoop]: Abstraction has 21451 states and 129143 transitions. [2021-06-12 19:48:41,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) [2021-06-12 19:48:41,243 INFO L276 IsEmpty]: Start isEmpty. Operand 21451 states and 129143 transitions. [2021-06-12 19:48:41,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 19:48:41,302 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:41,302 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:41,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-12 19:48:41,303 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:41,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:41,303 INFO L82 PathProgramCache]: Analyzing trace with hash 436841416, now seen corresponding path program 1 times [2021-06-12 19:48:41,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:41,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682710530] [2021-06-12 19:48:41,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:41,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:48:41,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:41,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682710530] [2021-06-12 19:48:41,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682710530] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:48:41,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:48:41,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 19:48:41,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528050836] [2021-06-12 19:48:41,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:48:41,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:41,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:48:41,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:48:41,340 INFO L87 Difference]: Start difference. First operand 21451 states and 129143 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) [2021-06-12 19:48:41,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:41,959 INFO L93 Difference]: Finished difference Result 36020 states and 210532 transitions. [2021-06-12 19:48:41,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:48:41,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) Word has length 29 [2021-06-12 19:48:41,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:42,154 INFO L225 Difference]: With dead ends: 36020 [2021-06-12 19:48:42,154 INFO L226 Difference]: Without dead ends: 35844 [2021-06-12 19:48:42,155 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:48:42,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35844 states. [2021-06-12 19:48:42,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35844 to 23309. [2021-06-12 19:48:42,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23309 states, 23308 states have (on average 5.963188604770894) internal successors, (138990), 23308 states have internal predecessors, (138990), 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) [2021-06-12 19:48:43,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23309 states to 23309 states and 138990 transitions. [2021-06-12 19:48:43,077 INFO L78 Accepts]: Start accepts. Automaton has 23309 states and 138990 transitions. Word has length 29 [2021-06-12 19:48:43,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:43,077 INFO L482 AbstractCegarLoop]: Abstraction has 23309 states and 138990 transitions. [2021-06-12 19:48:43,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) [2021-06-12 19:48:43,078 INFO L276 IsEmpty]: Start isEmpty. Operand 23309 states and 138990 transitions. [2021-06-12 19:48:43,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 19:48:43,143 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:43,143 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:43,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-12 19:48:43,143 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:43,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:43,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1878403238, now seen corresponding path program 2 times [2021-06-12 19:48:43,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:43,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762793305] [2021-06-12 19:48:43,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:43,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:43,409 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-12 19:48:43,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:48:43,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:43,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762793305] [2021-06-12 19:48:43,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762793305] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:48:43,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:48:43,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 19:48:43,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536733444] [2021-06-12 19:48:43,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:48:43,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:43,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:48:43,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:48:43,423 INFO L87 Difference]: Start difference. First operand 23309 states and 138990 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) [2021-06-12 19:48:43,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:43,767 INFO L93 Difference]: Finished difference Result 35264 states and 207669 transitions. [2021-06-12 19:48:43,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:48:43,767 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) Word has length 29 [2021-06-12 19:48:43,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:43,913 INFO L225 Difference]: With dead ends: 35264 [2021-06-12 19:48:43,913 INFO L226 Difference]: Without dead ends: 35264 [2021-06-12 19:48:43,913 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:48:44,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35264 states. [2021-06-12 19:48:45,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35264 to 26215. [2021-06-12 19:48:45,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26215 states, 26214 states have (on average 5.978828107118334) internal successors, (156729), 26214 states have internal predecessors, (156729), 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) [2021-06-12 19:48:45,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26215 states to 26215 states and 156729 transitions. [2021-06-12 19:48:45,240 INFO L78 Accepts]: Start accepts. Automaton has 26215 states and 156729 transitions. Word has length 29 [2021-06-12 19:48:45,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:45,240 INFO L482 AbstractCegarLoop]: Abstraction has 26215 states and 156729 transitions. [2021-06-12 19:48:45,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) [2021-06-12 19:48:45,241 INFO L276 IsEmpty]: Start isEmpty. Operand 26215 states and 156729 transitions. [2021-06-12 19:48:45,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 19:48:45,310 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:45,310 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:45,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-12 19:48:45,311 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:45,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:45,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1069767712, now seen corresponding path program 2 times [2021-06-12 19:48:45,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:45,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851009140] [2021-06-12 19:48:45,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:45,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:45,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:48:45,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:45,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851009140] [2021-06-12 19:48:45,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851009140] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:48:45,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:48:45,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 19:48:45,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029941318] [2021-06-12 19:48:45,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:48:45,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:45,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:48:45,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:48:45,334 INFO L87 Difference]: Start difference. First operand 26215 states and 156729 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) [2021-06-12 19:48:45,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:45,919 INFO L93 Difference]: Finished difference Result 35265 states and 205937 transitions. [2021-06-12 19:48:45,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:48:45,919 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) Word has length 29 [2021-06-12 19:48:45,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:46,080 INFO L225 Difference]: With dead ends: 35265 [2021-06-12 19:48:46,080 INFO L226 Difference]: Without dead ends: 35115 [2021-06-12 19:48:46,081 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:48:46,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35115 states. [2021-06-12 19:48:46,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35115 to 27707. [2021-06-12 19:48:46,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27707 states, 27706 states have (on average 5.942972641305133) internal successors, (164656), 27706 states have internal predecessors, (164656), 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) [2021-06-12 19:48:47,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27707 states to 27707 states and 164656 transitions. [2021-06-12 19:48:47,378 INFO L78 Accepts]: Start accepts. Automaton has 27707 states and 164656 transitions. Word has length 29 [2021-06-12 19:48:47,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:47,378 INFO L482 AbstractCegarLoop]: Abstraction has 27707 states and 164656 transitions. [2021-06-12 19:48:47,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) [2021-06-12 19:48:47,379 INFO L276 IsEmpty]: Start isEmpty. Operand 27707 states and 164656 transitions. [2021-06-12 19:48:47,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 19:48:47,482 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:47,483 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:47,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-12 19:48:47,483 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:47,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:47,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1363058564, now seen corresponding path program 2 times [2021-06-12 19:48:47,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:47,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505928558] [2021-06-12 19:48:47,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:47,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:47,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:48:47,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:47,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505928558] [2021-06-12 19:48:47,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505928558] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:48:47,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:48:47,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 19:48:47,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977844554] [2021-06-12 19:48:47,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:48:47,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:47,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:48:47,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:48:47,516 INFO L87 Difference]: Start difference. First operand 27707 states and 164656 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) [2021-06-12 19:48:47,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:47,916 INFO L93 Difference]: Finished difference Result 45133 states and 263334 transitions. [2021-06-12 19:48:47,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:48:47,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) Word has length 29 [2021-06-12 19:48:47,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:48,474 INFO L225 Difference]: With dead ends: 45133 [2021-06-12 19:48:48,474 INFO L226 Difference]: Without dead ends: 45133 [2021-06-12 19:48:48,474 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:48:48,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45133 states. [2021-06-12 19:48:49,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45133 to 32206. [2021-06-12 19:48:49,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32206 states, 32205 states have (on average 5.952895513119081) internal successors, (191713), 32205 states have internal predecessors, (191713), 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) [2021-06-12 19:48:49,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32206 states to 32206 states and 191713 transitions. [2021-06-12 19:48:49,617 INFO L78 Accepts]: Start accepts. Automaton has 32206 states and 191713 transitions. Word has length 29 [2021-06-12 19:48:49,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:49,617 INFO L482 AbstractCegarLoop]: Abstraction has 32206 states and 191713 transitions. [2021-06-12 19:48:49,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) [2021-06-12 19:48:49,617 INFO L276 IsEmpty]: Start isEmpty. Operand 32206 states and 191713 transitions. [2021-06-12 19:48:50,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 19:48:50,137 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:50,137 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:50,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-12 19:48:50,137 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:50,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:50,139 INFO L82 PathProgramCache]: Analyzing trace with hash -69829824, now seen corresponding path program 2 times [2021-06-12 19:48:50,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:50,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624048936] [2021-06-12 19:48:50,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:50,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:50,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:48:50,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:50,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624048936] [2021-06-12 19:48:50,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624048936] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:48:50,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:48:50,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 19:48:50,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120103239] [2021-06-12 19:48:50,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:48:50,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:50,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:48:50,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:48:50,195 INFO L87 Difference]: Start difference. First operand 32206 states and 191713 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) [2021-06-12 19:48:50,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:50,566 INFO L93 Difference]: Finished difference Result 45104 states and 260644 transitions. [2021-06-12 19:48:50,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:48:50,567 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) Word has length 29 [2021-06-12 19:48:50,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:51,146 INFO L225 Difference]: With dead ends: 45104 [2021-06-12 19:48:51,146 INFO L226 Difference]: Without dead ends: 44872 [2021-06-12 19:48:51,147 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:48:51,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44872 states. [2021-06-12 19:48:52,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44872 to 34465. [2021-06-12 19:48:52,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34465 states, 34464 states have (on average 5.9103122098421546) internal successors, (203693), 34464 states have internal predecessors, (203693), 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) [2021-06-12 19:48:52,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34465 states to 34465 states and 203693 transitions. [2021-06-12 19:48:52,436 INFO L78 Accepts]: Start accepts. Automaton has 34465 states and 203693 transitions. Word has length 29 [2021-06-12 19:48:52,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:52,437 INFO L482 AbstractCegarLoop]: Abstraction has 34465 states and 203693 transitions. [2021-06-12 19:48:52,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) [2021-06-12 19:48:52,437 INFO L276 IsEmpty]: Start isEmpty. Operand 34465 states and 203693 transitions. [2021-06-12 19:48:52,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 19:48:52,864 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:52,864 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:52,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-12 19:48:52,864 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:52,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:52,866 INFO L82 PathProgramCache]: Analyzing trace with hash 176225484, now seen corresponding path program 2 times [2021-06-12 19:48:52,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:52,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832357888] [2021-06-12 19:48:52,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:52,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:52,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:48:52,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:52,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832357888] [2021-06-12 19:48:52,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832357888] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:48:52,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:48:52,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 19:48:52,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113250112] [2021-06-12 19:48:52,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:48:52,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:52,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:48:52,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:48:52,926 INFO L87 Difference]: Start difference. First operand 34465 states and 203693 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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) [2021-06-12 19:48:53,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:53,366 INFO L93 Difference]: Finished difference Result 47735 states and 276681 transitions. [2021-06-12 19:48:53,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:48:53,371 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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) Word has length 29 [2021-06-12 19:48:53,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:53,957 INFO L225 Difference]: With dead ends: 47735 [2021-06-12 19:48:53,957 INFO L226 Difference]: Without dead ends: 47735 [2021-06-12 19:48:53,957 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:48:54,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47735 states. [2021-06-12 19:48:55,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47735 to 37708. [2021-06-12 19:48:55,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37708 states, 37707 states have (on average 5.9143660328321) internal successors, (223013), 37707 states have internal predecessors, (223013), 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) [2021-06-12 19:48:55,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37708 states to 37708 states and 223013 transitions. [2021-06-12 19:48:55,249 INFO L78 Accepts]: Start accepts. Automaton has 37708 states and 223013 transitions. Word has length 29 [2021-06-12 19:48:55,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:55,249 INFO L482 AbstractCegarLoop]: Abstraction has 37708 states and 223013 transitions. [2021-06-12 19:48:55,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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) [2021-06-12 19:48:55,250 INFO L276 IsEmpty]: Start isEmpty. Operand 37708 states and 223013 transitions. [2021-06-12 19:48:55,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 19:48:55,748 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:55,748 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:55,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-12 19:48:55,748 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:55,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:55,749 INFO L82 PathProgramCache]: Analyzing trace with hash -593663994, now seen corresponding path program 1 times [2021-06-12 19:48:55,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:55,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189214834] [2021-06-12 19:48:55,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:55,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:55,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:48:55,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:55,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189214834] [2021-06-12 19:48:55,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189214834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:55,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415076973] [2021-06-12 19:48:55,865 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 [2021-06-12 19:48:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:55,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:48:55,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:48:56,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:48:56,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415076973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:56,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:48:56,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-06-12 19:48:56,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808897413] [2021-06-12 19:48:56,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:48:56,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:56,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:48:56,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:48:56,052 INFO L87 Difference]: Start difference. First operand 37708 states and 223013 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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) [2021-06-12 19:48:56,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:56,472 INFO L93 Difference]: Finished difference Result 48610 states and 280421 transitions. [2021-06-12 19:48:56,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:48:56,473 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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) Word has length 31 [2021-06-12 19:48:56,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:57,114 INFO L225 Difference]: With dead ends: 48610 [2021-06-12 19:48:57,114 INFO L226 Difference]: Without dead ends: 48062 [2021-06-12 19:48:57,114 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.4ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:48:57,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48062 states. [2021-06-12 19:48:58,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48062 to 40315. [2021-06-12 19:48:58,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40315 states, 40314 states have (on average 5.896785235898199) internal successors, (237723), 40314 states have internal predecessors, (237723), 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) [2021-06-12 19:48:58,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40315 states to 40315 states and 237723 transitions. [2021-06-12 19:48:58,889 INFO L78 Accepts]: Start accepts. Automaton has 40315 states and 237723 transitions. Word has length 31 [2021-06-12 19:48:58,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:58,889 INFO L482 AbstractCegarLoop]: Abstraction has 40315 states and 237723 transitions. [2021-06-12 19:48:58,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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) [2021-06-12 19:48:58,890 INFO L276 IsEmpty]: Start isEmpty. Operand 40315 states and 237723 transitions. [2021-06-12 19:48:59,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 19:48:59,010 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:59,011 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:59,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:48:59,211 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:59,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:59,212 INFO L82 PathProgramCache]: Analyzing trace with hash 2113132984, now seen corresponding path program 2 times [2021-06-12 19:48:59,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:59,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136745031] [2021-06-12 19:48:59,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:59,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:59,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:48:59,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:59,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136745031] [2021-06-12 19:48:59,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136745031] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:48:59,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:48:59,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 19:48:59,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426526800] [2021-06-12 19:48:59,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:48:59,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:59,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:48:59,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:48:59,260 INFO L87 Difference]: Start difference. First operand 40315 states and 237723 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:00,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:49:00,125 INFO L93 Difference]: Finished difference Result 50404 states and 290958 transitions. [2021-06-12 19:49:00,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 19:49:00,126 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 19:49:00,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:49:00,401 INFO L225 Difference]: With dead ends: 50404 [2021-06-12 19:49:00,401 INFO L226 Difference]: Without dead ends: 49856 [2021-06-12 19:49:00,401 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:49:00,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49856 states. [2021-06-12 19:49:01,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49856 to 42372. [2021-06-12 19:49:01,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42372 states, 42371 states have (on average 5.882112765806802) internal successors, (249231), 42371 states have internal predecessors, (249231), 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) [2021-06-12 19:49:02,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42372 states to 42372 states and 249231 transitions. [2021-06-12 19:49:02,062 INFO L78 Accepts]: Start accepts. Automaton has 42372 states and 249231 transitions. Word has length 31 [2021-06-12 19:49:02,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:49:02,062 INFO L482 AbstractCegarLoop]: Abstraction has 42372 states and 249231 transitions. [2021-06-12 19:49:02,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:02,063 INFO L276 IsEmpty]: Start isEmpty. Operand 42372 states and 249231 transitions. [2021-06-12 19:49:02,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 19:49:02,166 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:49:02,166 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:49:02,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-12 19:49:02,166 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:49:02,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:49:02,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1191880650, now seen corresponding path program 1 times [2021-06-12 19:49:02,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:49:02,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057298494] [2021-06-12 19:49:02,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:49:02,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:02,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:49:02,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:49:02,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057298494] [2021-06-12 19:49:02,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057298494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:02,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691002158] [2021-06-12 19:49:02,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-12 19:49:02,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:02,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:49:02,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:49:02,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:49:02,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691002158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:02,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:49:02,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-06-12 19:49:02,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258990730] [2021-06-12 19:49:02,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:49:02,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:49:02,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:49:02,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:49:02,383 INFO L87 Difference]: Start difference. First operand 42372 states and 249231 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 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) [2021-06-12 19:49:03,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:49:03,455 INFO L93 Difference]: Finished difference Result 53113 states and 305911 transitions. [2021-06-12 19:49:03,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:49:03,455 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 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) Word has length 31 [2021-06-12 19:49:03,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:49:03,863 INFO L225 Difference]: With dead ends: 53113 [2021-06-12 19:49:03,864 INFO L226 Difference]: Without dead ends: 52637 [2021-06-12 19:49:03,864 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:49:04,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52637 states. [2021-06-12 19:49:05,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52637 to 45439. [2021-06-12 19:49:05,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45439 states, 45438 states have (on average 5.865487037281571) internal successors, (266516), 45438 states have internal predecessors, (266516), 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) [2021-06-12 19:49:05,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45439 states to 45439 states and 266516 transitions. [2021-06-12 19:49:05,833 INFO L78 Accepts]: Start accepts. Automaton has 45439 states and 266516 transitions. Word has length 31 [2021-06-12 19:49:05,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:49:05,833 INFO L482 AbstractCegarLoop]: Abstraction has 45439 states and 266516 transitions. [2021-06-12 19:49:05,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 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) [2021-06-12 19:49:05,834 INFO L276 IsEmpty]: Start isEmpty. Operand 45439 states and 266516 transitions. [2021-06-12 19:49:05,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 19:49:05,946 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:49:05,946 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:49:06,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-12 19:49:06,147 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:49:06,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:49:06,147 INFO L82 PathProgramCache]: Analyzing trace with hash -831103464, now seen corresponding path program 2 times [2021-06-12 19:49:06,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:49:06,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908284351] [2021-06-12 19:49:06,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:49:06,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:06,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:49:06,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:49:06,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908284351] [2021-06-12 19:49:06,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908284351] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:49:06,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:49:06,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 19:49:06,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235337438] [2021-06-12 19:49:06,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:49:06,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:49:06,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:49:06,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:49:06,185 INFO L87 Difference]: Start difference. First operand 45439 states and 266516 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:06,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:49:06,963 INFO L93 Difference]: Finished difference Result 55542 states and 319905 transitions. [2021-06-12 19:49:06,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 19:49:06,963 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 19:49:06,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:49:07,195 INFO L225 Difference]: With dead ends: 55542 [2021-06-12 19:49:07,196 INFO L226 Difference]: Without dead ends: 55066 [2021-06-12 19:49:07,196 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:49:07,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55066 states. [2021-06-12 19:49:08,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55066 to 48103. [2021-06-12 19:49:08,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48103 states, 48102 states have (on average 5.849070724709991) internal successors, (281352), 48102 states have internal predecessors, (281352), 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) [2021-06-12 19:49:09,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48103 states to 48103 states and 281352 transitions. [2021-06-12 19:49:09,393 INFO L78 Accepts]: Start accepts. Automaton has 48103 states and 281352 transitions. Word has length 31 [2021-06-12 19:49:09,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:49:09,394 INFO L482 AbstractCegarLoop]: Abstraction has 48103 states and 281352 transitions. [2021-06-12 19:49:09,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:09,394 INFO L276 IsEmpty]: Start isEmpty. Operand 48103 states and 281352 transitions. [2021-06-12 19:49:09,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 19:49:09,547 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:49:09,547 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:49:09,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-12 19:49:09,548 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:49:09,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:49:09,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1332009242, now seen corresponding path program 1 times [2021-06-12 19:49:09,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:49:09,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378907130] [2021-06-12 19:49:09,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:49:09,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:09,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:49:09,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:49:09,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378907130] [2021-06-12 19:49:09,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378907130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:09,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556178578] [2021-06-12 19:49:09,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-12 19:49:09,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:09,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:49:09,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:49:09,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:49:09,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556178578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:09,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:49:09,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-06-12 19:49:09,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958434213] [2021-06-12 19:49:09,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:49:09,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:49:09,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:49:09,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:49:09,744 INFO L87 Difference]: Start difference. First operand 48103 states and 281352 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 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) [2021-06-12 19:49:10,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:49:10,662 INFO L93 Difference]: Finished difference Result 56784 states and 326793 transitions. [2021-06-12 19:49:10,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:49:10,663 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 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) Word has length 31 [2021-06-12 19:49:10,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:49:10,921 INFO L225 Difference]: With dead ends: 56784 [2021-06-12 19:49:10,921 INFO L226 Difference]: Without dead ends: 56381 [2021-06-12 19:49:10,922 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:49:11,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56381 states. [2021-06-12 19:49:12,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56381 to 50997. [2021-06-12 19:49:12,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50997 states, 50996 states have (on average 5.823652835516511) internal successors, (296983), 50996 states have internal predecessors, (296983), 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) [2021-06-12 19:49:13,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50997 states to 50997 states and 296983 transitions. [2021-06-12 19:49:13,088 INFO L78 Accepts]: Start accepts. Automaton has 50997 states and 296983 transitions. Word has length 31 [2021-06-12 19:49:13,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:49:13,088 INFO L482 AbstractCegarLoop]: Abstraction has 50997 states and 296983 transitions. [2021-06-12 19:49:13,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 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) [2021-06-12 19:49:13,088 INFO L276 IsEmpty]: Start isEmpty. Operand 50997 states and 296983 transitions. [2021-06-12 19:49:13,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 19:49:13,287 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:49:13,287 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:49:13,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-12 19:49:13,488 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:49:13,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:49:13,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1023820348, now seen corresponding path program 2 times [2021-06-12 19:49:13,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:49:13,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564216692] [2021-06-12 19:49:13,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:49:13,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:13,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:49:13,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:49:13,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564216692] [2021-06-12 19:49:13,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564216692] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:49:13,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:49:13,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 19:49:13,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095324718] [2021-06-12 19:49:13,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:49:13,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:49:13,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:49:13,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:49:13,531 INFO L87 Difference]: Start difference. First operand 50997 states and 296983 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:14,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:49:14,463 INFO L93 Difference]: Finished difference Result 58483 states and 336376 transitions. [2021-06-12 19:49:14,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 19:49:14,464 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 19:49:14,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:49:14,753 INFO L225 Difference]: With dead ends: 58483 [2021-06-12 19:49:14,754 INFO L226 Difference]: Without dead ends: 58080 [2021-06-12 19:49:14,754 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:49:14,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58080 states. [2021-06-12 19:49:16,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58080 to 53054. [2021-06-12 19:49:16,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53054 states, 53053 states have (on average 5.811565792697868) internal successors, (308321), 53053 states have internal predecessors, (308321), 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) [2021-06-12 19:49:16,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53054 states to 53054 states and 308321 transitions. [2021-06-12 19:49:16,575 INFO L78 Accepts]: Start accepts. Automaton has 53054 states and 308321 transitions. Word has length 31 [2021-06-12 19:49:16,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:49:16,575 INFO L482 AbstractCegarLoop]: Abstraction has 53054 states and 308321 transitions. [2021-06-12 19:49:16,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:16,575 INFO L276 IsEmpty]: Start isEmpty. Operand 53054 states and 308321 transitions. [2021-06-12 19:49:17,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 19:49:17,108 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:49:17,109 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:49:17,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-12 19:49:17,109 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:49:17,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:49:17,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1770438268, now seen corresponding path program 3 times [2021-06-12 19:49:17,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:49:17,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422029846] [2021-06-12 19:49:17,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:49:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:17,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:49:17,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:49:17,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422029846] [2021-06-12 19:49:17,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422029846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:17,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989181917] [2021-06-12 19:49:17,161 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 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 [2021-06-12 19:49:17,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:49:17,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:49:17,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:49:17,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:49:17,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:49:17,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989181917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:17,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:49:17,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 19:49:17,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133410735] [2021-06-12 19:49:17,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:49:17,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:49:17,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:49:17,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:49:17,277 INFO L87 Difference]: Start difference. First operand 53054 states and 308321 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 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) [2021-06-12 19:49:19,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:49:19,699 INFO L93 Difference]: Finished difference Result 166964 states and 963436 transitions. [2021-06-12 19:49:19,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:49:19,699 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 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) Word has length 33 [2021-06-12 19:49:19,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:49:21,018 INFO L225 Difference]: With dead ends: 166964 [2021-06-12 19:49:21,018 INFO L226 Difference]: Without dead ends: 166964 [2021-06-12 19:49:21,018 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 143.2ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:49:21,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166964 states. [2021-06-12 19:49:24,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166964 to 71659. [2021-06-12 19:49:25,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71659 states, 71658 states have (on average 5.932080158530799) internal successors, (425081), 71658 states have internal predecessors, (425081), 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) [2021-06-12 19:49:25,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71659 states to 71659 states and 425081 transitions. [2021-06-12 19:49:25,893 INFO L78 Accepts]: Start accepts. Automaton has 71659 states and 425081 transitions. Word has length 33 [2021-06-12 19:49:25,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:49:25,893 INFO L482 AbstractCegarLoop]: Abstraction has 71659 states and 425081 transitions. [2021-06-12 19:49:25,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 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) [2021-06-12 19:49:25,894 INFO L276 IsEmpty]: Start isEmpty. Operand 71659 states and 425081 transitions. [2021-06-12 19:49:26,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 19:49:26,143 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:49:26,143 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:49:26,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:49:26,346 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:49:26,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:49:26,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1115118472, now seen corresponding path program 4 times [2021-06-12 19:49:26,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:49:26,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156596413] [2021-06-12 19:49:26,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:49:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:26,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:49:26,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:49:26,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156596413] [2021-06-12 19:49:26,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156596413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:26,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369021290] [2021-06-12 19:49:26,375 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 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 [2021-06-12 19:49:26,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:49:26,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:49:26,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:49:26,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:49:26,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:49:26,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369021290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:26,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:49:26,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 19:49:26,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789906766] [2021-06-12 19:49:26,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:49:26,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:49:26,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:49:26,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:49:26,479 INFO L87 Difference]: Start difference. First operand 71659 states and 425081 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 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) [2021-06-12 19:49:28,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:49:28,519 INFO L93 Difference]: Finished difference Result 151965 states and 880181 transitions. [2021-06-12 19:49:28,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:49:28,519 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 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) Word has length 33 [2021-06-12 19:49:28,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:49:30,075 INFO L225 Difference]: With dead ends: 151965 [2021-06-12 19:49:30,076 INFO L226 Difference]: Without dead ends: 151069 [2021-06-12 19:49:30,076 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 98.3ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:49:30,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151069 states. [2021-06-12 19:49:35,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151069 to 98035. [2021-06-12 19:49:35,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98035 states, 98034 states have (on average 6.051471938307118) internal successors, (593250), 98034 states have internal predecessors, (593250), 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) [2021-06-12 19:49:36,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98035 states to 98035 states and 593250 transitions. [2021-06-12 19:49:36,249 INFO L78 Accepts]: Start accepts. Automaton has 98035 states and 593250 transitions. Word has length 33 [2021-06-12 19:49:36,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:49:36,250 INFO L482 AbstractCegarLoop]: Abstraction has 98035 states and 593250 transitions. [2021-06-12 19:49:36,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 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) [2021-06-12 19:49:36,250 INFO L276 IsEmpty]: Start isEmpty. Operand 98035 states and 593250 transitions. [2021-06-12 19:49:37,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 19:49:37,103 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:49:37,103 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:49:37,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:49:37,317 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:49:37,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:49:37,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1087275208, now seen corresponding path program 5 times [2021-06-12 19:49:37,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:49:37,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503884300] [2021-06-12 19:49:37,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:49:37,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:37,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:49:37,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:49:37,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503884300] [2021-06-12 19:49:37,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503884300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:37,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243542322] [2021-06-12 19:49:37,356 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:49:37,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:49:37,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:49:37,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:49:37,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:49:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:49:37,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243542322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:37,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:49:37,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 19:49:37,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281333624] [2021-06-12 19:49:37,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:49:37,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:49:37,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:49:37,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:49:37,507 INFO L87 Difference]: Start difference. First operand 98035 states and 593250 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 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) [2021-06-12 19:49:39,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:49:39,489 INFO L93 Difference]: Finished difference Result 145413 states and 850897 transitions. [2021-06-12 19:49:39,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:49:39,489 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 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) Word has length 33 [2021-06-12 19:49:39,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:49:40,761 INFO L225 Difference]: With dead ends: 145413 [2021-06-12 19:49:40,761 INFO L226 Difference]: Without dead ends: 145413 [2021-06-12 19:49:40,762 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:49:41,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145413 states. [2021-06-12 19:49:44,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145413 to 96954. [2021-06-12 19:49:44,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96954 states, 96953 states have (on average 6.02823017338298) internal successors, (584455), 96953 states have internal predecessors, (584455), 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) [2021-06-12 19:49:45,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96954 states to 96954 states and 584455 transitions. [2021-06-12 19:49:45,713 INFO L78 Accepts]: Start accepts. Automaton has 96954 states and 584455 transitions. Word has length 33 [2021-06-12 19:49:45,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:49:45,713 INFO L482 AbstractCegarLoop]: Abstraction has 96954 states and 584455 transitions. [2021-06-12 19:49:45,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 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) [2021-06-12 19:49:45,714 INFO L276 IsEmpty]: Start isEmpty. Operand 96954 states and 584455 transitions. [2021-06-12 19:49:46,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 19:49:46,529 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:49:46,529 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:49:46,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:49:46,762 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:49:46,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:49:46,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1114801284, now seen corresponding path program 6 times [2021-06-12 19:49:46,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:49:46,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094294067] [2021-06-12 19:49:46,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:49:46,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:46,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:49:46,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:49:46,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094294067] [2021-06-12 19:49:46,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094294067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:46,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331795178] [2021-06-12 19:49:46,802 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:49:46,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:49:46,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:49:46,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:49:46,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:49:46,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:49:46,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331795178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:46,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:49:46,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 19:49:46,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128026326] [2021-06-12 19:49:46,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:49:46,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:49:46,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:49:46,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:49:46,912 INFO L87 Difference]: Start difference. First operand 96954 states and 584455 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 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) [2021-06-12 19:49:48,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:49:48,726 INFO L93 Difference]: Finished difference Result 133964 states and 783258 transitions. [2021-06-12 19:49:48,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:49:48,726 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 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) Word has length 33 [2021-06-12 19:49:48,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:49:49,502 INFO L225 Difference]: With dead ends: 133964 [2021-06-12 19:49:49,502 INFO L226 Difference]: Without dead ends: 133804 [2021-06-12 19:49:49,502 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:49:50,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133804 states. [2021-06-12 19:49:53,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133804 to 97004. [2021-06-12 19:49:53,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97004 states, 97003 states have (on average 6.026844530581529) internal successors, (584622), 97003 states have internal predecessors, (584622), 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) [2021-06-12 19:49:54,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97004 states to 97004 states and 584622 transitions. [2021-06-12 19:49:54,752 INFO L78 Accepts]: Start accepts. Automaton has 97004 states and 584622 transitions. Word has length 33 [2021-06-12 19:49:54,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:49:54,752 INFO L482 AbstractCegarLoop]: Abstraction has 97004 states and 584622 transitions. [2021-06-12 19:49:54,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 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) [2021-06-12 19:49:54,752 INFO L276 IsEmpty]: Start isEmpty. Operand 97004 states and 584622 transitions. [2021-06-12 19:49:55,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 19:49:55,641 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:49:55,641 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:49:55,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:49:55,857 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:49:55,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:49:55,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1890250694, now seen corresponding path program 7 times [2021-06-12 19:49:55,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:49:55,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316662649] [2021-06-12 19:49:55,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:49:55,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:55,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:49:55,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:49:55,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316662649] [2021-06-12 19:49:55,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316662649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:55,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89661148] [2021-06-12 19:49:55,902 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:49:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:55,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:49:55,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:49:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:49:56,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89661148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:56,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:49:56,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 19:49:56,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932688413] [2021-06-12 19:49:56,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:49:56,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:49:56,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:49:56,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:49:56,052 INFO L87 Difference]: Start difference. First operand 97004 states and 584622 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 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) [2021-06-12 19:50:00,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:00,284 INFO L93 Difference]: Finished difference Result 227012 states and 1346306 transitions. [2021-06-12 19:50:00,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:50:00,285 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 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) Word has length 33 [2021-06-12 19:50:00,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:02,185 INFO L225 Difference]: With dead ends: 227012 [2021-06-12 19:50:02,185 INFO L226 Difference]: Without dead ends: 227012 [2021-06-12 19:50:02,185 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:50:03,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227012 states. [2021-06-12 19:50:08,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227012 to 126089. [2021-06-12 19:50:08,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126089 states, 126088 states have (on average 6.168192056341603) internal successors, (777735), 126088 states have internal predecessors, (777735), 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) [2021-06-12 19:50:10,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126089 states to 126089 states and 777735 transitions. [2021-06-12 19:50:10,622 INFO L78 Accepts]: Start accepts. Automaton has 126089 states and 777735 transitions. Word has length 33 [2021-06-12 19:50:10,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:10,622 INFO L482 AbstractCegarLoop]: Abstraction has 126089 states and 777735 transitions. [2021-06-12 19:50:10,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 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) [2021-06-12 19:50:10,623 INFO L276 IsEmpty]: Start isEmpty. Operand 126089 states and 777735 transitions. [2021-06-12 19:50:11,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 19:50:11,126 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:11,126 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:11,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-12 19:50:11,328 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:50:11,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:11,329 INFO L82 PathProgramCache]: Analyzing trace with hash -403167046, now seen corresponding path program 8 times [2021-06-12 19:50:11,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:11,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519914792] [2021-06-12 19:50:11,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:11,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:11,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:11,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519914792] [2021-06-12 19:50:11,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519914792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:11,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584495084] [2021-06-12 19:50:11,360 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:11,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:50:11,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:11,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:50:11,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:11,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:11,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584495084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:11,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:11,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 19:50:11,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360051067] [2021-06-12 19:50:11,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:50:11,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:11,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:50:11,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:50:11,469 INFO L87 Difference]: Start difference. First operand 126089 states and 777735 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 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) [2021-06-12 19:50:13,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:13,998 INFO L93 Difference]: Finished difference Result 173970 states and 1035526 transitions. [2021-06-12 19:50:13,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:50:13,998 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 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) Word has length 33 [2021-06-12 19:50:13,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:15,408 INFO L225 Difference]: With dead ends: 173970 [2021-06-12 19:50:15,408 INFO L226 Difference]: Without dead ends: 173746 [2021-06-12 19:50:15,409 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:50:15,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173746 states. [2021-06-12 19:50:21,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173746 to 125926. [2021-06-12 19:50:21,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125926 states, 125925 states have (on average 6.16766329164185) internal successors, (776663), 125925 states have internal predecessors, (776663), 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) [2021-06-12 19:50:23,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125926 states to 125926 states and 776663 transitions. [2021-06-12 19:50:23,887 INFO L78 Accepts]: Start accepts. Automaton has 125926 states and 776663 transitions. Word has length 33 [2021-06-12 19:50:23,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:23,887 INFO L482 AbstractCegarLoop]: Abstraction has 125926 states and 776663 transitions. [2021-06-12 19:50:23,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 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) [2021-06-12 19:50:23,888 INFO L276 IsEmpty]: Start isEmpty. Operand 125926 states and 776663 transitions. [2021-06-12 19:50:24,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 19:50:24,728 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:24,728 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:24,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-12 19:50:24,949 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:50:24,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:24,949 INFO L82 PathProgramCache]: Analyzing trace with hash -383649482, now seen corresponding path program 9 times [2021-06-12 19:50:24,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:24,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555099594] [2021-06-12 19:50:24,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:24,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:24,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:24,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:24,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555099594] [2021-06-12 19:50:24,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555099594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:24,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774047280] [2021-06-12 19:50:24,994 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:25,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:50:25,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:25,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:50:25,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:25,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:25,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774047280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:25,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:25,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 19:50:25,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197451256] [2021-06-12 19:50:25,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:50:25,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:25,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:50:25,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:50:25,177 INFO L87 Difference]: Start difference. First operand 125926 states and 776663 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 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) [2021-06-12 19:50:28,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:28,422 INFO L93 Difference]: Finished difference Result 199329 states and 1186134 transitions. [2021-06-12 19:50:28,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:50:28,422 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 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) Word has length 33 [2021-06-12 19:50:28,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:30,040 INFO L225 Difference]: With dead ends: 199329 [2021-06-12 19:50:30,040 INFO L226 Difference]: Without dead ends: 199329 [2021-06-12 19:50:30,040 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 98.7ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:50:30,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199329 states. [2021-06-12 19:50:36,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199329 to 128232. [2021-06-12 19:50:36,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128232 states, 128231 states have (on average 6.171487393843922) internal successors, (791376), 128231 states have internal predecessors, (791376), 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) [2021-06-12 19:50:38,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128232 states to 128232 states and 791376 transitions. [2021-06-12 19:50:38,083 INFO L78 Accepts]: Start accepts. Automaton has 128232 states and 791376 transitions. Word has length 33 [2021-06-12 19:50:38,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:38,083 INFO L482 AbstractCegarLoop]: Abstraction has 128232 states and 791376 transitions. [2021-06-12 19:50:38,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 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) [2021-06-12 19:50:38,083 INFO L276 IsEmpty]: Start isEmpty. Operand 128232 states and 791376 transitions. [2021-06-12 19:50:39,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 19:50:39,075 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:39,075 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:39,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-12 19:50:39,289 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:50:39,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:39,289 INFO L82 PathProgramCache]: Analyzing trace with hash -356123406, now seen corresponding path program 10 times [2021-06-12 19:50:39,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:39,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294831139] [2021-06-12 19:50:39,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:39,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:39,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:39,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294831139] [2021-06-12 19:50:39,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294831139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:39,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527087244] [2021-06-12 19:50:39,343 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:39,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:50:39,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:39,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:50:39,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:39,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:39,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527087244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:39,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:39,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 19:50:39,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407729865] [2021-06-12 19:50:39,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:50:39,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:39,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:50:39,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:50:39,518 INFO L87 Difference]: Start difference. First operand 128232 states and 791376 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 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) [2021-06-12 19:50:43,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:43,309 INFO L93 Difference]: Finished difference Result 216985 states and 1280323 transitions. [2021-06-12 19:50:43,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:50:43,309 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 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) Word has length 33 [2021-06-12 19:50:43,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:45,869 INFO L225 Difference]: With dead ends: 216985 [2021-06-12 19:50:45,869 INFO L226 Difference]: Without dead ends: 216825 [2021-06-12 19:50:45,869 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:50:46,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216825 states. [2021-06-12 19:50:52,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216825 to 128330. [2021-06-12 19:50:52,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128330 states, 128329 states have (on average 6.170133017478512) internal successors, (791807), 128329 states have internal predecessors, (791807), 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) [2021-06-12 19:50:54,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128330 states to 128330 states and 791807 transitions. [2021-06-12 19:50:54,131 INFO L78 Accepts]: Start accepts. Automaton has 128330 states and 791807 transitions. Word has length 33 [2021-06-12 19:50:54,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:54,131 INFO L482 AbstractCegarLoop]: Abstraction has 128330 states and 791807 transitions. [2021-06-12 19:50:54,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 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) [2021-06-12 19:50:54,131 INFO L276 IsEmpty]: Start isEmpty. Operand 128330 states and 791807 transitions. [2021-06-12 19:50:54,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 19:50:54,642 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:54,642 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:54,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:54,845 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:50:54,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:54,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1477538938, now seen corresponding path program 11 times [2021-06-12 19:50:54,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:54,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135448966] [2021-06-12 19:50:54,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:54,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:54,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:54,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:54,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135448966] [2021-06-12 19:50:54,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135448966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:54,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793461409] [2021-06-12 19:50:54,872 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:54,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:50:54,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:54,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:50:54,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:54,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:54,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793461409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:54,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:54,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 19:50:54,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068982507] [2021-06-12 19:50:54,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:50:54,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:54,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:50:54,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:50:54,995 INFO L87 Difference]: Start difference. First operand 128330 states and 791807 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 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) [2021-06-12 19:50:58,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:58,284 INFO L93 Difference]: Finished difference Result 212002 states and 1272275 transitions. [2021-06-12 19:50:58,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:50:58,285 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 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) Word has length 33 [2021-06-12 19:50:58,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:01,257 INFO L225 Difference]: With dead ends: 212002 [2021-06-12 19:51:01,257 INFO L226 Difference]: Without dead ends: 212002 [2021-06-12 19:51:01,258 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 118.6ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:51:01,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212002 states. [2021-06-12 19:51:08,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212002 to 140596. [2021-06-12 19:51:08,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140596 states, 140595 states have (on average 6.156221771755752) internal successors, (865534), 140595 states have internal predecessors, (865534), 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) [2021-06-12 19:51:10,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140596 states to 140596 states and 865534 transitions. [2021-06-12 19:51:10,238 INFO L78 Accepts]: Start accepts. Automaton has 140596 states and 865534 transitions. Word has length 33 [2021-06-12 19:51:10,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:10,238 INFO L482 AbstractCegarLoop]: Abstraction has 140596 states and 865534 transitions. [2021-06-12 19:51:10,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 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) [2021-06-12 19:51:10,238 INFO L276 IsEmpty]: Start isEmpty. Operand 140596 states and 865534 transitions. [2021-06-12 19:51:10,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 19:51:10,801 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:10,801 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:11,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-12 19:51:11,002 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:51:11,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:11,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1859308072, now seen corresponding path program 12 times [2021-06-12 19:51:11,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:11,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293986353] [2021-06-12 19:51:11,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:11,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:11,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:11,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:11,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293986353] [2021-06-12 19:51:11,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293986353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:11,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528614438] [2021-06-12 19:51:11,034 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:11,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:51:11,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:11,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:51:11,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:11,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:11,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528614438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:11,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:11,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 19:51:11,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555550540] [2021-06-12 19:51:11,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:51:11,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:11,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:51:11,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:51:11,141 INFO L87 Difference]: Start difference. First operand 140596 states and 865534 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 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) [2021-06-12 19:51:14,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:14,341 INFO L93 Difference]: Finished difference Result 227249 states and 1340487 transitions. [2021-06-12 19:51:14,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:51:14,342 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 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) Word has length 33 [2021-06-12 19:51:14,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:16,202 INFO L225 Difference]: With dead ends: 227249 [2021-06-12 19:51:16,202 INFO L226 Difference]: Without dead ends: 226769 [2021-06-12 19:51:16,203 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:51:16,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226769 states. [2021-06-12 19:51:24,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226769 to 146902. [2021-06-12 19:51:25,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146902 states, 146901 states have (on average 6.137010639818653) internal successors, (901533), 146901 states have internal predecessors, (901533), 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) [2021-06-12 19:51:27,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146902 states to 146902 states and 901533 transitions. [2021-06-12 19:51:27,571 INFO L78 Accepts]: Start accepts. Automaton has 146902 states and 901533 transitions. Word has length 33 [2021-06-12 19:51:27,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:27,571 INFO L482 AbstractCegarLoop]: Abstraction has 146902 states and 901533 transitions. [2021-06-12 19:51:27,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 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) [2021-06-12 19:51:27,572 INFO L276 IsEmpty]: Start isEmpty. Operand 146902 states and 901533 transitions. [2021-06-12 19:51:28,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 19:51:28,556 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:28,556 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:28,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-12 19:51:28,772 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:51:28,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:28,773 INFO L82 PathProgramCache]: Analyzing trace with hash 935111500, now seen corresponding path program 3 times [2021-06-12 19:51:28,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:28,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014890053] [2021-06-12 19:51:28,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:28,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:28,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:28,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:28,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014890053] [2021-06-12 19:51:28,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014890053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:28,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321497715] [2021-06-12 19:51:28,827 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:28,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:51:28,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:28,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:51:28,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:29,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:29,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321497715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:29,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:29,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-12 19:51:29,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058936764] [2021-06-12 19:51:29,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:51:29,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:29,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:51:29,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:51:29,014 INFO L87 Difference]: Start difference. First operand 146902 states and 901533 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-06-12 19:51:38,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:38,413 INFO L93 Difference]: Finished difference Result 514975 states and 3149120 transitions. [2021-06-12 19:51:38,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:51:38,413 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) Word has length 33 [2021-06-12 19:51:38,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:47,154 INFO L225 Difference]: With dead ends: 514975 [2021-06-12 19:51:47,154 INFO L226 Difference]: Without dead ends: 514975 [2021-06-12 19:51:47,154 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 147.7ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:51:49,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514975 states. [2021-06-12 19:52:06,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514975 to 223496. [2021-06-12 19:52:06,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223496 states, 223495 states have (on average 6.274547529027495) internal successors, (1402330), 223495 states have internal predecessors, (1402330), 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) [2021-06-12 19:52:10,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223496 states to 223496 states and 1402330 transitions. [2021-06-12 19:52:10,145 INFO L78 Accepts]: Start accepts. Automaton has 223496 states and 1402330 transitions. Word has length 33 [2021-06-12 19:52:10,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:10,145 INFO L482 AbstractCegarLoop]: Abstraction has 223496 states and 1402330 transitions. [2021-06-12 19:52:10,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-06-12 19:52:10,146 INFO L276 IsEmpty]: Start isEmpty. Operand 223496 states and 1402330 transitions. [2021-06-12 19:52:12,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 19:52:12,299 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:12,300 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:12,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 19:52:12,500 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:52:12,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:12,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1788862708, now seen corresponding path program 4 times [2021-06-12 19:52:12,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:12,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373293007] [2021-06-12 19:52:12,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:12,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:12,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:12,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373293007] [2021-06-12 19:52:12,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373293007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:12,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076264034] [2021-06-12 19:52:12,543 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:12,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:52:12,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:12,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:52:12,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:12,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:12,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076264034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:12,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:12,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-12 19:52:12,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118065136] [2021-06-12 19:52:12,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:52:12,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:12,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:52:12,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:52:12,713 INFO L87 Difference]: Start difference. First operand 223496 states and 1402330 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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)