/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-wmm/thin000_pso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 11:08:50,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 11:08:50,842 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 11:08:50,868 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-24 11:08:50,868 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-24 11:08:50,869 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-24 11:08:50,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-24 11:08:50,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-24 11:08:50,873 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-24 11:08:50,874 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-24 11:08:50,875 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-24 11:08:50,876 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-24 11:08:50,876 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-24 11:08:50,877 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-24 11:08:50,878 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-24 11:08:50,879 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-24 11:08:50,879 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-24 11:08:50,880 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-24 11:08:50,881 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-24 11:08:50,883 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-24 11:08:50,884 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-24 11:08:50,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-24 11:08:50,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-24 11:08:50,886 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-24 11:08:50,888 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-24 11:08:50,891 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-24 11:08:50,891 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-24 11:08:50,892 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-24 11:08:50,892 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-24 11:08:50,893 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-24 11:08:50,894 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-24 11:08:50,894 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-24 11:08:50,894 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-24 11:08:50,894 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-24 11:08:50,895 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-24 11:08:50,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-24 11:08:50,900 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-PN-VariableLbe.epf [2021-03-24 11:08:50,927 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 11:08:50,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 11:08:50,928 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 11:08:50,928 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 11:08:50,928 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 11:08:50,928 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 11:08:50,928 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 11:08:50,928 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 11:08:50,929 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 11:08:50,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 11:08:50,929 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 11:08:50,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 11:08:50,929 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 11:08:50,929 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 11:08:50,929 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 11:08:50,929 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 11:08:50,929 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 11:08:50,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 11:08:50,930 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 11:08:50,930 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 11:08:50,930 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 11:08:50,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 11:08:50,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 11:08:50,930 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 11:08:50,930 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 11:08:50,931 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 11:08:50,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 11:08:50,931 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-24 11:08:50,931 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 11:08:50,931 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 11:08:51,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 11:08:51,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 11:08:51,239 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 11:08:51,240 INFO L271 PluginConnector]: Initializing CDTParser... [2021-03-24 11:08:51,241 INFO L275 PluginConnector]: CDTParser initialized [2021-03-24 11:08:51,241 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/thin000_pso.opt.i [2021-03-24 11:08:51,305 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43d6c42d4/b96463282fee4f09a3db69c59b4ea37a/FLAGffa05c2f4 [2021-03-24 11:08:51,720 INFO L306 CDTParser]: Found 1 translation units. [2021-03-24 11:08:51,720 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/thin000_pso.opt.i [2021-03-24 11:08:51,730 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43d6c42d4/b96463282fee4f09a3db69c59b4ea37a/FLAGffa05c2f4 [2021-03-24 11:08:52,059 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43d6c42d4/b96463282fee4f09a3db69c59b4ea37a [2021-03-24 11:08:52,061 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 11:08:52,062 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-03-24 11:08:52,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-03-24 11:08:52,067 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-03-24 11:08:52,070 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-03-24 11:08:52,070 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.03 11:08:52" (1/1) ... [2021-03-24 11:08:52,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b0beea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 11:08:52, skipping insertion in model container [2021-03-24 11:08:52,071 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.03 11:08:52" (1/1) ... [2021-03-24 11:08:52,078 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-03-24 11:08:52,110 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-03-24 11:08:52,239 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/thin000_pso.opt.i[949,962] [2021-03-24 11:08:52,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-24 11:08:52,356 INFO L203 MainTranslator]: Completed pre-run [2021-03-24 11:08:52,402 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/thin000_pso.opt.i[949,962] [2021-03-24 11:08:52,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-24 11:08:52,507 INFO L208 MainTranslator]: Completed translation [2021-03-24 11:08:52,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 11:08:52 WrapperNode [2021-03-24 11:08:52,508 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-03-24 11:08:52,510 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 11:08:52,510 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 11:08:52,510 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 11:08:52,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 11:08:52" (1/1) ... [2021-03-24 11:08:52,544 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 11:08:52" (1/1) ... [2021-03-24 11:08:52,562 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 11:08:52,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 11:08:52,563 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 11:08:52,563 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 11:08:52,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 11:08:52" (1/1) ... [2021-03-24 11:08:52,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 11:08:52" (1/1) ... [2021-03-24 11:08:52,571 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 11:08:52" (1/1) ... [2021-03-24 11:08:52,572 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 11:08:52" (1/1) ... [2021-03-24 11:08:52,575 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 11:08:52" (1/1) ... [2021-03-24 11:08:52,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 11:08:52" (1/1) ... [2021-03-24 11:08:52,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 11:08:52" (1/1) ... [2021-03-24 11:08:52,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 11:08:52,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 11:08:52,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 11:08:52,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 11:08:52,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 11:08:52" (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 [2021-03-24 11:08:52,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-03-24 11:08:52,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-03-24 11:08:52,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-03-24 11:08:52,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-03-24 11:08:52,645 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2021-03-24 11:08:52,645 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2021-03-24 11:08:52,645 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2021-03-24 11:08:52,646 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2021-03-24 11:08:52,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-03-24 11:08:52,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-03-24 11:08:52,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 11:08:52,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 11:08:52,647 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-24 11:08:52,950 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 11:08:52,950 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-03-24 11:08:52,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 11:08:52 BoogieIcfgContainer [2021-03-24 11:08:52,952 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 11:08:52,954 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 11:08:52,954 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 11:08:52,973 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 11:08:52,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.03 11:08:52" (1/3) ... [2021-03-24 11:08:52,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7138d4aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 11:08:52, skipping insertion in model container [2021-03-24 11:08:52,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 11:08:52" (2/3) ... [2021-03-24 11:08:52,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7138d4aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 11:08:52, skipping insertion in model container [2021-03-24 11:08:52,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 11:08:52" (3/3) ... [2021-03-24 11:08:52,986 INFO L111 eAbstractionObserver]: Analyzing ICFG thin000_pso.opt.i [2021-03-24 11:08:52,991 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 11:08:52,994 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 11:08:52,995 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 11:08:53,032 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:08:53,033 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:08:53,033 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:08:53,033 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:08:53,034 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:08:53,034 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:08:53,034 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:08:53,034 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:08:53,035 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:08:53,035 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:08:53,035 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:08:53,035 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:08:53,036 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:08:53,036 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:08:53,036 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:08:53,036 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:08:53,038 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:08:53,038 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:08:53,038 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:08:53,038 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:08:53,039 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:08:53,039 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:08:53,040 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:08:53,040 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:08:53,042 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:08:53,042 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:08:53,042 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:08:53,043 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:08:53,048 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:08:53,048 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:08:53,048 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:08:53,048 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:08:53,050 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 11:08:53,066 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-24 11:08:53,097 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 11:08:53,097 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 11:08:53,097 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 11:08:53,098 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 11:08:53,098 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 11:08:53,098 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 11:08:53,098 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 11:08:53,098 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 11:08:53,109 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 66 places, 61 transitions, 132 flow [2021-03-24 11:08:53,157 INFO L129 PetriNetUnfolder]: 2/59 cut-off events. [2021-03-24 11:08:53,157 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 11:08:53,160 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 59 events. 2/59 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 35 event pairs, 0 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2021-03-24 11:08:53,160 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 61 transitions, 132 flow [2021-03-24 11:08:53,163 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 49 transitions, 104 flow [2021-03-24 11:08:53,164 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-24 11:08:53,171 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 49 transitions, 104 flow [2021-03-24 11:08:53,173 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 55 places, 49 transitions, 104 flow [2021-03-24 11:08:53,174 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 55 places, 49 transitions, 104 flow [2021-03-24 11:08:53,185 INFO L129 PetriNetUnfolder]: 1/49 cut-off events. [2021-03-24 11:08:53,186 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 11:08:53,186 INFO L84 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 49 events. 1/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 30 event pairs, 0 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 32. Up to 2 conditions per place. [2021-03-24 11:08:53,188 INFO L142 LiptonReduction]: Number of co-enabled transitions 456 [2021-03-24 11:08:54,195 INFO L154 LiptonReduction]: Checked pairs total: 608 [2021-03-24 11:08:54,196 INFO L156 LiptonReduction]: Total number of compositions: 34 [2021-03-24 11:08:54,198 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1035 [2021-03-24 11:08:54,212 INFO L129 PetriNetUnfolder]: 0/13 cut-off events. [2021-03-24 11:08:54,213 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 11:08:54,213 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 11:08:54,213 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 11:08:54,214 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 11:08:54,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 11:08:54,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1656014901, now seen corresponding path program 1 times [2021-03-24 11:08:54,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 11:08:54,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862534738] [2021-03-24 11:08:54,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 11:08:54,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 11:08:54,447 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 11:08:54,457 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 11:08:54,458 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 11:08:54,458 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 11:08:54,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 11:08:54,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862534738] [2021-03-24 11:08:54,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 11:08:54,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-24 11:08:54,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852929654] [2021-03-24 11:08:54,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 11:08:54,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 11:08:54,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 11:08:54,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 11:08:54,490 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 95 [2021-03-24 11:08:54,492 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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) [2021-03-24 11:08:54,493 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 11:08:54,493 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 95 [2021-03-24 11:08:54,494 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 11:08:54,517 INFO L129 PetriNetUnfolder]: 0/15 cut-off events. [2021-03-24 11:08:54,517 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 11:08:54,517 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 15 events. 0/15 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 11 event pairs, 0 based on Foata normal form. 1/16 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-24 11:08:54,518 INFO L132 encePairwiseOnDemand]: 92/95 looper letters, 1 selfloop transitions, 2 changer transitions 0/15 dead transitions. [2021-03-24 11:08:54,518 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 15 transitions, 42 flow [2021-03-24 11:08:54,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 11:08:54,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 11:08:54,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2021-03-24 11:08:54,532 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8666666666666667 [2021-03-24 11:08:54,532 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2021-03-24 11:08:54,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2021-03-24 11:08:54,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 11:08:54,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2021-03-24 11:08:54,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 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) [2021-03-24 11:08:54,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 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) [2021-03-24 11:08:54,550 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 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) [2021-03-24 11:08:54,552 INFO L185 Difference]: Start difference. First operand has 22 places, 15 transitions, 36 flow. Second operand 3 states and 247 transitions. [2021-03-24 11:08:54,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 15 transitions, 42 flow [2021-03-24 11:08:54,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 40 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-24 11:08:54,560 INFO L241 Difference]: Finished difference. Result has 23 places, 15 transitions, 42 flow [2021-03-24 11:08:54,562 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=23, PETRI_TRANSITIONS=15} [2021-03-24 11:08:54,563 INFO L343 CegarLoopForPetriNet]: 22 programPoint places, 1 predicate places. [2021-03-24 11:08:54,563 INFO L480 AbstractCegarLoop]: Abstraction has has 23 places, 15 transitions, 42 flow [2021-03-24 11:08:54,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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) [2021-03-24 11:08:54,563 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 11:08:54,563 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 11:08:54,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 11:08:54,564 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 11:08:54,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 11:08:54,564 INFO L82 PathProgramCache]: Analyzing trace with hash 203145301, now seen corresponding path program 1 times [2021-03-24 11:08:54,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 11:08:54,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932923284] [2021-03-24 11:08:54,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 11:08:54,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 11:08:54,655 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 11:08:54,656 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 11:08:54,657 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 11:08:54,657 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 11:08:54,661 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 11:08:54,661 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 11:08:54,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 11:08:54,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932923284] [2021-03-24 11:08:54,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 11:08:54,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 11:08:54,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880558066] [2021-03-24 11:08:54,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 11:08:54,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 11:08:54,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 11:08:54,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 11:08:54,669 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 95 [2021-03-24 11:08:54,669 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 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) [2021-03-24 11:08:54,670 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 11:08:54,670 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 95 [2021-03-24 11:08:54,670 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 11:08:54,690 INFO L129 PetriNetUnfolder]: 0/20 cut-off events. [2021-03-24 11:08:54,690 INFO L130 PetriNetUnfolder]: For 7/8 co-relation queries the response was YES. [2021-03-24 11:08:54,690 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 20 events. 0/20 cut-off events. For 7/8 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 24 event pairs, 0 based on Foata normal form. 2/21 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-03-24 11:08:54,691 INFO L132 encePairwiseOnDemand]: 91/95 looper letters, 1 selfloop transitions, 3 changer transitions 1/16 dead transitions. [2021-03-24 11:08:54,691 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 16 transitions, 57 flow [2021-03-24 11:08:54,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-24 11:08:54,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-24 11:08:54,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 315 transitions. [2021-03-24 11:08:54,695 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8289473684210527 [2021-03-24 11:08:54,695 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 315 transitions. [2021-03-24 11:08:54,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 315 transitions. [2021-03-24 11:08:54,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 11:08:54,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 315 transitions. [2021-03-24 11:08:54,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 78.75) internal successors, (315), 4 states have internal predecessors, (315), 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) [2021-03-24 11:08:54,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 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) [2021-03-24 11:08:54,700 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 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) [2021-03-24 11:08:54,700 INFO L185 Difference]: Start difference. First operand has 23 places, 15 transitions, 42 flow. Second operand 4 states and 315 transitions. [2021-03-24 11:08:54,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 16 transitions, 57 flow [2021-03-24 11:08:54,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 16 transitions, 51 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-24 11:08:54,701 INFO L241 Difference]: Finished difference. Result has 26 places, 15 transitions, 52 flow [2021-03-24 11:08:54,702 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=52, PETRI_PLACES=26, PETRI_TRANSITIONS=15} [2021-03-24 11:08:54,702 INFO L343 CegarLoopForPetriNet]: 22 programPoint places, 4 predicate places. [2021-03-24 11:08:54,702 INFO L480 AbstractCegarLoop]: Abstraction has has 26 places, 15 transitions, 52 flow [2021-03-24 11:08:54,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 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) [2021-03-24 11:08:54,703 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 11:08:54,703 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 11:08:54,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 11:08:54,704 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 11:08:54,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 11:08:54,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1437482520, now seen corresponding path program 1 times [2021-03-24 11:08:54,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 11:08:54,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260231892] [2021-03-24 11:08:54,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 11:08:54,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 11:08:54,779 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 11:08:54,780 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 11:08:54,780 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 11:08:54,781 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 11:08:54,783 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 11:08:54,783 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 11:08:54,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 11:08:54,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260231892] [2021-03-24 11:08:54,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 11:08:54,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 11:08:54,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237643788] [2021-03-24 11:08:54,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 11:08:54,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 11:08:54,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 11:08:54,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 11:08:54,790 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 95 [2021-03-24 11:08:54,791 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 15 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 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) [2021-03-24 11:08:54,791 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 11:08:54,791 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 95 [2021-03-24 11:08:54,791 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 11:08:54,803 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-03-24 11:08:54,803 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-03-24 11:08:54,803 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 14 events. 0/14 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 5 event pairs, 0 based on Foata normal form. 2/16 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 11:08:54,803 INFO L132 encePairwiseOnDemand]: 92/95 looper letters, 0 selfloop transitions, 0 changer transitions 14/14 dead transitions. [2021-03-24 11:08:54,803 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 14 transitions, 50 flow [2021-03-24 11:08:54,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-24 11:08:54,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-24 11:08:54,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 313 transitions. [2021-03-24 11:08:54,805 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8236842105263158 [2021-03-24 11:08:54,805 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 313 transitions. [2021-03-24 11:08:54,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 313 transitions. [2021-03-24 11:08:54,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 11:08:54,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 313 transitions. [2021-03-24 11:08:54,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 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) [2021-03-24 11:08:54,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 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) [2021-03-24 11:08:54,808 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 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) [2021-03-24 11:08:54,808 INFO L185 Difference]: Start difference. First operand has 26 places, 15 transitions, 52 flow. Second operand 4 states and 313 transitions. [2021-03-24 11:08:54,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 14 transitions, 50 flow [2021-03-24 11:08:54,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 14 transitions, 38 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-03-24 11:08:54,808 INFO L241 Difference]: Finished difference. Result has 22 places, 0 transitions, 0 flow [2021-03-24 11:08:54,809 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=22, PETRI_TRANSITIONS=0} [2021-03-24 11:08:54,809 INFO L343 CegarLoopForPetriNet]: 22 programPoint places, 0 predicate places. [2021-03-24 11:08:54,809 INFO L480 AbstractCegarLoop]: Abstraction has has 22 places, 0 transitions, 0 flow [2021-03-24 11:08:54,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 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) [2021-03-24 11:08:54,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-24 11:08:54,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 11:08:54 BasicIcfg [2021-03-24 11:08:54,813 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 11:08:54,814 INFO L168 Benchmark]: Toolchain (without parser) took 2751.32 ms. Allocated memory is still 320.9 MB. Free memory was 285.0 MB in the beginning and 218.7 MB in the end (delta: 66.3 MB). Peak memory consumption was 67.2 MB. Max. memory is 16.0 GB. [2021-03-24 11:08:54,815 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 320.9 MB. Free memory was 302.8 MB in the beginning and 302.6 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 11:08:54,815 INFO L168 Benchmark]: CACSL2BoogieTranslator took 442.28 ms. Allocated memory is still 320.9 MB. Free memory was 284.7 MB in the beginning and 285.1 MB in the end (delta: -467.4 kB). Peak memory consumption was 9.2 MB. Max. memory is 16.0 GB. [2021-03-24 11:08:54,816 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.70 ms. Allocated memory is still 320.9 MB. Free memory was 285.1 MB in the beginning and 284.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 11:08:54,820 INFO L168 Benchmark]: Boogie Preprocessor took 17.38 ms. Allocated memory is still 320.9 MB. Free memory was 284.1 MB in the beginning and 282.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 11:08:54,822 INFO L168 Benchmark]: RCFGBuilder took 371.30 ms. Allocated memory is still 320.9 MB. Free memory was 282.0 MB in the beginning and 260.0 MB in the end (delta: 22.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-03-24 11:08:54,825 INFO L168 Benchmark]: TraceAbstraction took 1859.46 ms. Allocated memory is still 320.9 MB. Free memory was 260.0 MB in the beginning and 218.7 MB in the end (delta: 41.3 MB). Peak memory consumption was 42.4 MB. Max. memory is 16.0 GB. [2021-03-24 11:08:54,828 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 320.9 MB. Free memory was 302.8 MB in the beginning and 302.6 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 442.28 ms. Allocated memory is still 320.9 MB. Free memory was 284.7 MB in the beginning and 285.1 MB in the end (delta: -467.4 kB). Peak memory consumption was 9.2 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 52.70 ms. Allocated memory is still 320.9 MB. Free memory was 285.1 MB in the beginning and 284.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 17.38 ms. Allocated memory is still 320.9 MB. Free memory was 284.1 MB in the beginning and 282.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 371.30 ms. Allocated memory is still 320.9 MB. Free memory was 282.0 MB in the beginning and 260.0 MB in the end (delta: 22.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1859.46 ms. Allocated memory is still 320.9 MB. Free memory was 260.0 MB in the beginning and 218.7 MB in the end (delta: 41.3 MB). Peak memory consumption was 42.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1023.2ms, 55 PlacesBefore, 22 PlacesAfterwards, 49 TransitionsBefore, 15 TransitionsAfterwards, 456 CoEnabledTransitionPairs, 5 FixpointIterations, 15 TrivialSequentialCompositions, 18 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 1 ChoiceCompositions, 34 TotalNumberOfCompositions, 608 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 422, positive: 390, positive conditional: 0, positive unconditional: 390, negative: 32, negative conditional: 0, negative unconditional: 32, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 229, positive: 216, positive conditional: 0, positive unconditional: 216, negative: 13, negative conditional: 0, negative unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 229, positive: 216, positive conditional: 0, positive unconditional: 216, negative: 13, negative conditional: 0, negative unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 422, positive: 174, positive conditional: 0, positive unconditional: 174, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 229, unknown conditional: 0, unknown unconditional: 229] , Statistics on independence cache: Total cache size (in pairs): 24, Positive cache size: 20, Positive conditional cache size: 0, Positive unconditional cache size: 20, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 60 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 9.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 1717.3ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 134.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1104.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 8 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 9 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=2, InterpolantAutomatonStates: 11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 13.9ms SsaConstructionTime, 98.9ms SatisfiabilityAnalysisTime, 203.4ms InterpolantComputationTime, 31 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 28 ConstructedInterpolants, 0 QuantifiedInterpolants, 78 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...