/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-MCRwithoutDepranks-Lazy.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/showcase/FischerWithBug.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-820ea7a [2022-02-20 10:51:25,652 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-20 10:51:25,653 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-20 10:51:25,714 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-20 10:51:25,714 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-20 10:51:25,716 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-20 10:51:25,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-20 10:51:25,721 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-20 10:51:25,722 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-20 10:51:25,725 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-20 10:51:25,726 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-20 10:51:25,727 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-20 10:51:25,727 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-20 10:51:25,728 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-20 10:51:25,729 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-20 10:51:25,732 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-20 10:51:25,733 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-20 10:51:25,733 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-20 10:51:25,735 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-20 10:51:25,738 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-20 10:51:25,739 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-20 10:51:25,740 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-20 10:51:25,741 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-20 10:51:25,742 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-20 10:51:25,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-20 10:51:25,747 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-20 10:51:25,747 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-20 10:51:25,747 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-20 10:51:25,748 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-20 10:51:25,748 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-20 10:51:25,748 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-20 10:51:25,749 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-20 10:51:25,750 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-20 10:51:25,752 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-20 10:51:25,752 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-20 10:51:25,752 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-20 10:51:25,753 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-20 10:51:25,753 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-20 10:51:25,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-20 10:51:25,754 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-20 10:51:25,754 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-20 10:51:25,755 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-MCRwithoutDepranks-Lazy.epf [2022-02-20 10:51:25,781 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-20 10:51:25,781 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-20 10:51:25,781 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-20 10:51:25,782 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-20 10:51:25,782 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-20 10:51:25,782 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-20 10:51:25,783 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-20 10:51:25,783 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-20 10:51:25,783 INFO L138 SettingsManager]: * Use SBE=true [2022-02-20 10:51:25,783 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-20 10:51:25,784 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-20 10:51:25,784 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-20 10:51:25,784 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-20 10:51:25,784 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-20 10:51:25,784 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-20 10:51:25,784 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-20 10:51:25,784 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-20 10:51:25,784 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-20 10:51:25,784 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-20 10:51:25,784 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-20 10:51:25,784 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-20 10:51:25,785 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-20 10:51:25,785 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-20 10:51:25,785 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-20 10:51:25,785 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-20 10:51:25,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-20 10:51:25,785 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-20 10:51:25,785 INFO L138 SettingsManager]: * Construct finite automaton lazily=true [2022-02-20 10:51:25,785 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-20 10:51:25,785 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-20 10:51:25,785 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-20 10:51:25,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-20 10:51:25,786 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-20 10:51:25,786 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2022-02-20 10:51:25,786 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-20 10:51:25,786 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=MCR_WITHOUT_DEPRANKS [2022-02-20 10:51:25,786 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-20 10:51:25,955 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-20 10:51:25,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-20 10:51:25,981 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-20 10:51:25,981 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-20 10:51:25,984 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-20 10:51:25,984 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/FischerWithBug.bpl [2022-02-20 10:51:25,985 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/FischerWithBug.bpl' [2022-02-20 10:51:26,002 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-20 10:51:26,003 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-20 10:51:26,006 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-20 10:51:26,007 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-20 10:51:26,007 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-20 10:51:26,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "FischerWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.02 10:51:26" (1/1) ... [2022-02-20 10:51:26,019 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "FischerWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.02 10:51:26" (1/1) ... [2022-02-20 10:51:26,023 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-20 10:51:26,024 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-20 10:51:26,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-20 10:51:26,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-20 10:51:26,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-20 10:51:26,031 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "FischerWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.02 10:51:26" (1/1) ... [2022-02-20 10:51:26,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "FischerWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.02 10:51:26" (1/1) ... [2022-02-20 10:51:26,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "FischerWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.02 10:51:26" (1/1) ... [2022-02-20 10:51:26,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "FischerWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.02 10:51:26" (1/1) ... [2022-02-20 10:51:26,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "FischerWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.02 10:51:26" (1/1) ... [2022-02-20 10:51:26,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "FischerWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.02 10:51:26" (1/1) ... [2022-02-20 10:51:26,036 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "FischerWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.02 10:51:26" (1/1) ... [2022-02-20 10:51:26,037 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-20 10:51:26,038 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-20 10:51:26,038 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-20 10:51:26,038 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-20 10:51:26,039 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "FischerWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.02 10:51:26" (1/1) ... [2022-02-20 10:51:26,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-20 10:51:26,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-20 10:51:26,063 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-20 10:51:26,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-20 10:51:26,098 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process2 given in one single declaration [2022-02-20 10:51:26,099 INFO L130 BoogieDeclarations]: Found specification of procedure Process2 [2022-02-20 10:51:26,099 INFO L138 BoogieDeclarations]: Found implementation of procedure Process2 [2022-02-20 10:51:26,099 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process1 given in one single declaration [2022-02-20 10:51:26,099 INFO L130 BoogieDeclarations]: Found specification of procedure Process1 [2022-02-20 10:51:26,099 INFO L138 BoogieDeclarations]: Found implementation of procedure Process1 [2022-02-20 10:51:26,099 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-20 10:51:26,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-20 10:51:26,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-20 10:51:26,099 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Clock given in one single declaration [2022-02-20 10:51:26,100 INFO L130 BoogieDeclarations]: Found specification of procedure Clock [2022-02-20 10:51:26,100 INFO L138 BoogieDeclarations]: Found implementation of procedure Clock [2022-02-20 10:51:26,100 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-20 10:51:26,137 INFO L234 CfgBuilder]: Building ICFG [2022-02-20 10:51:26,138 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-20 10:51:26,258 INFO L275 CfgBuilder]: Performing block encoding [2022-02-20 10:51:26,264 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-20 10:51:26,264 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-20 10:51:26,265 INFO L202 PluginConnector]: Adding new model FischerWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 10:51:26 BoogieIcfgContainer [2022-02-20 10:51:26,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-20 10:51:26,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-20 10:51:26,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-20 10:51:26,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-20 10:51:26,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "FischerWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.02 10:51:26" (1/2) ... [2022-02-20 10:51:26,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41ba1d34 and model type FischerWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 10:51:26, skipping insertion in model container [2022-02-20 10:51:26,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "FischerWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 10:51:26" (2/2) ... [2022-02-20 10:51:26,284 INFO L111 eAbstractionObserver]: Analyzing ICFG FischerWithBug.bpl [2022-02-20 10:51:26,288 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-20 10:51:26,288 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-20 10:51:26,288 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-02-20 10:51:26,288 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-20 10:51:26,335 WARN L322 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-02-20 10:51:26,335 WARN L322 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-02-20 10:51:26,336 WARN L322 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-02-20 10:51:26,336 WARN L322 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-02-20 10:51:26,337 WARN L322 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-02-20 10:51:26,337 WARN L322 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-02-20 10:51:26,337 WARN L322 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-02-20 10:51:26,337 WARN L322 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-02-20 10:51:26,338 WARN L322 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-02-20 10:51:26,339 WARN L322 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-02-20 10:51:26,339 WARN L322 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-02-20 10:51:26,339 WARN L322 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-02-20 10:51:26,340 WARN L322 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-02-20 10:51:26,340 WARN L322 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-02-20 10:51:26,340 WARN L322 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-02-20 10:51:26,340 WARN L322 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-02-20 10:51:26,344 WARN L322 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-02-20 10:51:26,345 WARN L322 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-02-20 10:51:26,345 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-02-20 10:51:26,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-02-20 10:51:26,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-20 10:51:26,400 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-02-20 10:51:26,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Waiting until timeout for monitored process [2022-02-20 10:51:26,440 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-20 10:51:26,445 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, mLazyFiniteAutomaton=true, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-02-20 10:51:26,445 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-02-20 10:51:26,597 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 55 transitions and produced 56 states. [2022-02-20 10:51:26,599 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting Process2Err0ASSERT_VIOLATIONASSERT === [Process2Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION (and 3 more)] === [2022-02-20 10:51:26,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 10:51:26,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1615810858, now seen corresponding path program 1 times [2022-02-20 10:51:26,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-20 10:51:26,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173320519] [2022-02-20 10:51:26,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 10:51:26,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-20 10:51:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 10:51:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-20 10:51:26,700 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-20 10:51:26,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173320519] [2022-02-20 10:51:26,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173320519] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-20 10:51:26,701 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-20 10:51:26,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-20 10:51:26,703 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169239218] [2022-02-20 10:51:26,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-20 10:51:26,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-02-20 10:51:26,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-20 10:51:26,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-02-20 10:51:26,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-02-20 10:51:26,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-02-20 10:51:26,733 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-02-20 10:51:26,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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) [2022-02-20 10:51:26,736 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-02-20 10:51:26,773 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 47 transitions and produced 48 states. [2022-02-20 10:51:26,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-02-20 10:51:26,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-20 10:51:26,775 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting Process1Err0ASSERT_VIOLATIONASSERT === [Process2Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION (and 3 more)] === [2022-02-20 10:51:26,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 10:51:26,776 INFO L85 PathProgramCache]: Analyzing trace with hash -716527660, now seen corresponding path program 1 times [2022-02-20 10:51:26,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-20 10:51:26,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74295587] [2022-02-20 10:51:26,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 10:51:26,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-20 10:51:26,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 10:51:26,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-20 10:51:26,804 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-20 10:51:26,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74295587] [2022-02-20 10:51:26,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74295587] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-20 10:51:26,804 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-20 10:51:26,804 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-02-20 10:51:26,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538472946] [2022-02-20 10:51:26,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-20 10:51:26,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-20 10:51:26,806 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-20 10:51:26,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-20 10:51:26,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-20 10:51:26,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-02-20 10:51:26,807 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-02-20 10:51:26,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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) [2022-02-20 10:51:26,807 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-02-20 10:51:26,807 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-02-20 10:51:28,144 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 442 transitions and produced 440 states. [2022-02-20 10:51:28,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-02-20 10:51:28,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-20 10:51:28,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-20 10:51:28,145 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting Process2Err0ASSERT_VIOLATIONASSERT === [Process2Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION (and 3 more)] === [2022-02-20 10:51:28,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 10:51:28,146 INFO L85 PathProgramCache]: Analyzing trace with hash 2091818685, now seen corresponding path program 1 times [2022-02-20 10:51:28,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-20 10:51:28,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745181195] [2022-02-20 10:51:28,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 10:51:28,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-20 10:51:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 10:51:28,261 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-02-20 10:51:28,262 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-20 10:51:28,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745181195] [2022-02-20 10:51:28,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745181195] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-20 10:51:28,262 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-20 10:51:28,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-20 10:51:28,262 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922918144] [2022-02-20 10:51:28,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-20 10:51:28,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-20 10:51:28,263 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-20 10:51:28,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-20 10:51:28,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-20 10:51:28,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-02-20 10:51:28,264 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-02-20 10:51:28,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 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) [2022-02-20 10:51:28,264 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-02-20 10:51:28,264 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2022-02-20 10:51:28,264 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-02-20 10:51:53,882 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 8960 transitions and produced 8266 states. [2022-02-20 10:51:53,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-02-20 10:51:53,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-20 10:51:53,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-20 10:51:53,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-20 10:51:53,885 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting Process2Err0ASSERT_VIOLATIONASSERT === [Process2Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION (and 3 more)] === [2022-02-20 10:51:53,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 10:51:53,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1270880568, now seen corresponding path program 1 times [2022-02-20 10:51:53,886 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-20 10:51:53,886 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913246204] [2022-02-20 10:51:53,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 10:51:53,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-20 10:51:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 10:51:55,031 INFO L134 CoverageAnalysis]: Checked inductivity of 129525 backedges. 21069 proven. 0 refuted. 0 times theorem prover too weak. 108456 trivial. 0 not checked. [2022-02-20 10:51:55,032 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-20 10:51:55,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913246204] [2022-02-20 10:51:55,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913246204] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-20 10:51:55,032 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-20 10:51:55,033 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-20 10:51:55,033 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85728529] [2022-02-20 10:51:55,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-20 10:51:55,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-20 10:51:55,034 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-20 10:51:55,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-20 10:51:55,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-20 10:51:55,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-02-20 10:51:55,035 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-02-20 10:51:55,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2022-02-20 10:51:55,036 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-02-20 10:51:55,036 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2022-02-20 10:51:55,036 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2022-02-20 10:51:55,036 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-02-20 10:52:19,237 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 8997 transitions and produced 8289 states. [2022-02-20 10:52:19,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-02-20 10:52:19,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-20 10:52:19,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-20 10:52:19,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-20 10:52:19,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-20 10:52:19,239 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting Process2Err0ASSERT_VIOLATIONASSERT === [Process2Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION (and 3 more)] === [2022-02-20 10:52:19,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 10:52:19,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1167319590, now seen corresponding path program 1 times [2022-02-20 10:52:19,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-20 10:52:19,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642008640] [2022-02-20 10:52:19,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 10:52:19,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-20 10:52:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 10:52:20,241 INFO L134 CoverageAnalysis]: Checked inductivity of 130609 backedges. 9226 proven. 0 refuted. 0 times theorem prover too weak. 121383 trivial. 0 not checked. [2022-02-20 10:52:20,241 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-20 10:52:20,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642008640] [2022-02-20 10:52:20,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642008640] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-20 10:52:20,241 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-20 10:52:20,242 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-20 10:52:20,242 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250045404] [2022-02-20 10:52:20,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-20 10:52:20,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-20 10:52:20,243 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-20 10:52:20,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-20 10:52:20,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-20 10:52:20,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-02-20 10:52:20,244 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-02-20 10:52:20,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2022-02-20 10:52:20,245 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-02-20 10:52:20,245 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2022-02-20 10:52:20,245 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2022-02-20 10:52:20,245 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2022-02-20 10:52:20,245 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states.