/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-atomic/peterson.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 18:28:36,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 18:28:36,527 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 18:28:36,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-13 18:28:36,558 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-13 18:28:36,560 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-13 18:28:36,562 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-13 18:28:36,566 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-13 18:28:36,567 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-13 18:28:36,570 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-13 18:28:36,571 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-13 18:28:36,572 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-13 18:28:36,572 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-13 18:28:36,574 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-13 18:28:36,575 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-13 18:28:36,576 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-13 18:28:36,578 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-13 18:28:36,578 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-13 18:28:36,580 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-13 18:28:36,583 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-13 18:28:36,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-13 18:28:36,601 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-13 18:28:36,602 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-13 18:28:36,603 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-13 18:28:36,608 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-13 18:28:36,608 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-13 18:28:36,608 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-13 18:28:36,610 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-13 18:28:36,610 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-13 18:28:36,610 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-13 18:28:36,610 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-13 18:28:36,611 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-13 18:28:36,612 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-13 18:28:36,612 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-13 18:28:36,613 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-13 18:28:36,613 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-13 18:28:36,613 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-13 18:28:36,614 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-13 18:28:36,614 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-13 18:28:36,614 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-13 18:28:36,615 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-13 18:28:36,618 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 18:28:36,649 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 18:28:36,649 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 18:28:36,650 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 18:28:36,650 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 18:28:36,652 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 18:28:36,652 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 18:28:36,652 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 18:28:36,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 18:28:36,652 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 18:28:36,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 18:28:36,653 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 18:28:36,653 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 18:28:36,653 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 18:28:36,653 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 18:28:36,653 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 18:28:36,654 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 18:28:36,654 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 18:28:36,654 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 18:28:36,654 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 18:28:36,654 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 18:28:36,654 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 18:28:36,654 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 18:28:36,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 18:28:36,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 18:28:36,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 18:28:36,655 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 18:28:36,655 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 18:28:36,655 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 18:28:36,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 18:28:36,655 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 18:28:36,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 18:28:36,655 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 18:28:36,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 18:28:36,909 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 18:28:36,911 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 18:28:36,912 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-13 18:28:36,913 INFO L275 PluginConnector]: CDTParser initialized [2021-07-13 18:28:36,913 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/peterson.i [2021-07-13 18:28:36,961 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f5dcb2b4/7965b4e02c334ed19825481dcbb534a2/FLAG98c76081c [2021-07-13 18:28:37,331 INFO L306 CDTParser]: Found 1 translation units. [2021-07-13 18:28:37,331 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/peterson.i [2021-07-13 18:28:37,351 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f5dcb2b4/7965b4e02c334ed19825481dcbb534a2/FLAG98c76081c [2021-07-13 18:28:37,690 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f5dcb2b4/7965b4e02c334ed19825481dcbb534a2 [2021-07-13 18:28:37,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 18:28:37,694 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-07-13 18:28:37,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-13 18:28:37,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-13 18:28:37,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-13 18:28:37,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:28:37" (1/1) ... [2021-07-13 18:28:37,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f24ff6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:28:37, skipping insertion in model container [2021-07-13 18:28:37,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:28:37" (1/1) ... [2021-07-13 18:28:37,708 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-13 18:28:37,751 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-13 18:28:37,872 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2021-07-13 18:28:38,033 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/peterson.i[30997,31010] [2021-07-13 18:28:38,047 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/peterson.i[31682,31695] [2021-07-13 18:28:38,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-13 18:28:38,057 INFO L203 MainTranslator]: Completed pre-run [2021-07-13 18:28:38,076 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2021-07-13 18:28:38,096 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/peterson.i[30997,31010] [2021-07-13 18:28:38,100 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/peterson.i[31682,31695] [2021-07-13 18:28:38,109 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-13 18:28:38,139 INFO L208 MainTranslator]: Completed translation [2021-07-13 18:28:38,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:28:38 WrapperNode [2021-07-13 18:28:38,139 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-13 18:28:38,140 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 18:28:38,140 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 18:28:38,141 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 18:28:38,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:28:38" (1/1) ... [2021-07-13 18:28:38,172 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:28:38" (1/1) ... [2021-07-13 18:28:38,185 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 18:28:38,186 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 18:28:38,186 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 18:28:38,186 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 18:28:38,192 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:28:38" (1/1) ... [2021-07-13 18:28:38,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:28:38" (1/1) ... [2021-07-13 18:28:38,194 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:28:38" (1/1) ... [2021-07-13 18:28:38,194 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:28:38" (1/1) ... [2021-07-13 18:28:38,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:28:38" (1/1) ... [2021-07-13 18:28:38,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:28:38" (1/1) ... [2021-07-13 18:28:38,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:28:38" (1/1) ... [2021-07-13 18:28:38,202 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 18:28:38,203 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 18:28:38,203 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 18:28:38,203 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 18:28:38,203 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:28:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 18:28:38,256 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-07-13 18:28:38,257 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2021-07-13 18:28:38,257 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2021-07-13 18:28:38,257 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2021-07-13 18:28:38,258 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2021-07-13 18:28:38,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-13 18:28:38,258 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-07-13 18:28:38,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-13 18:28:38,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-13 18:28:38,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-13 18:28:38,258 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-07-13 18:28:38,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 18:28:38,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 18:28:38,259 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 18:28:38,561 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 18:28:38,561 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-07-13 18:28:38,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:28:38 BoogieIcfgContainer [2021-07-13 18:28:38,563 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 18:28:38,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 18:28:38,564 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 18:28:38,566 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 18:28:38,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 06:28:37" (1/3) ... [2021-07-13 18:28:38,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55efbeeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:28:38, skipping insertion in model container [2021-07-13 18:28:38,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:28:38" (2/3) ... [2021-07-13 18:28:38,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55efbeeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:28:38, skipping insertion in model container [2021-07-13 18:28:38,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:28:38" (3/3) ... [2021-07-13 18:28:38,567 INFO L111 eAbstractionObserver]: Analyzing ICFG peterson.i [2021-07-13 18:28:38,571 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 18:28:38,571 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 18:28:38,571 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-07-13 18:28:38,571 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 18:28:38,597 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,597 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,597 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,597 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,597 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,597 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,598 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,598 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,598 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,598 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,598 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,598 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,598 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,599 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,599 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,599 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,599 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,599 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,599 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,599 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,599 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,600 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,600 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,600 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,600 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,600 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,600 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,600 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,601 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,601 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,601 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,601 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,602 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,602 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,602 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,602 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,602 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,602 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,602 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,602 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,602 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,602 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,603 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,603 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,603 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,603 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,603 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,603 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,603 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,603 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,603 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,604 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,604 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,604 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,604 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,604 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,605 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,605 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,605 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,606 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,606 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,606 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,609 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,609 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,609 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,609 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,609 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,609 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:28:38,616 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-07-13 18:28:38,630 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-13 18:28:38,642 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 18:28:38,642 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 18:28:38,642 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 18:28:38,642 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 18:28:38,642 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 18:28:38,642 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 18:28:38,642 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 18:28:38,642 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thr1Thread1of1ForFork0======== [2021-07-13 18:28:38,648 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 79 places, 80 transitions, 182 flow [2021-07-13 18:28:38,711 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 895 states, 893 states have (on average 2.8174692049272116) internal successors, (2516), 894 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:38,714 INFO L276 IsEmpty]: Start isEmpty. Operand has 895 states, 893 states have (on average 2.8174692049272116) internal successors, (2516), 894 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:38,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 18:28:38,721 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:28:38,721 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:28:38,722 INFO L430 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:28:38,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:28:38,728 INFO L82 PathProgramCache]: Analyzing trace with hash -11332315, now seen corresponding path program 1 times [2021-07-13 18:28:38,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:28:38,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871760594] [2021-07-13 18:28:38,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:28:38,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:38,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:28:38,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:28:38,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871760594] [2021-07-13 18:28:38,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871760594] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:28:38,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:28:38,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 18:28:38,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263425307] [2021-07-13 18:28:38,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-07-13 18:28:38,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:28:38,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-07-13 18:28:38,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-13 18:28:38,902 INFO L87 Difference]: Start difference. First operand has 895 states, 893 states have (on average 2.8174692049272116) internal successors, (2516), 894 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:38,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:28:38,925 INFO L93 Difference]: Finished difference Result 895 states and 2347 transitions. [2021-07-13 18:28:38,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-13 18:28:38,926 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 18:28:38,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:28:38,943 INFO L225 Difference]: With dead ends: 895 [2021-07-13 18:28:38,943 INFO L226 Difference]: Without dead ends: 895 [2021-07-13 18:28:38,944 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-13 18:28:38,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-07-13 18:28:38,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 895. [2021-07-13 18:28:38,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 893 states have (on average 2.6282194848824187) internal successors, (2347), 894 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:39,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 2347 transitions. [2021-07-13 18:28:39,003 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 2347 transitions. Word has length 28 [2021-07-13 18:28:39,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:28:39,004 INFO L482 AbstractCegarLoop]: Abstraction has 895 states and 2347 transitions. [2021-07-13 18:28:39,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:39,004 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 2347 transitions. [2021-07-13 18:28:39,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 18:28:39,005 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:28:39,005 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:28:39,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 18:28:39,005 INFO L430 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:28:39,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:28:39,006 INFO L82 PathProgramCache]: Analyzing trace with hash -11302524, now seen corresponding path program 1 times [2021-07-13 18:28:39,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:28:39,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912500605] [2021-07-13 18:28:39,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:28:39,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:39,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:28:39,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:28:39,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912500605] [2021-07-13 18:28:39,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912500605] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:28:39,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:28:39,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 18:28:39,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465500438] [2021-07-13 18:28:39,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 18:28:39,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:28:39,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 18:28:39,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 18:28:39,058 INFO L87 Difference]: Start difference. First operand 895 states and 2347 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:39,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:28:39,078 INFO L93 Difference]: Finished difference Result 842 states and 2161 transitions. [2021-07-13 18:28:39,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 18:28:39,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 18:28:39,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:28:39,081 INFO L225 Difference]: With dead ends: 842 [2021-07-13 18:28:39,081 INFO L226 Difference]: Without dead ends: 532 [2021-07-13 18:28:39,082 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 18:28:39,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-07-13 18:28:39,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 532. [2021-07-13 18:28:39,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 530 states have (on average 2.526415094339623) internal successors, (1339), 531 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:39,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1339 transitions. [2021-07-13 18:28:39,114 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1339 transitions. Word has length 28 [2021-07-13 18:28:39,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:28:39,114 INFO L482 AbstractCegarLoop]: Abstraction has 532 states and 1339 transitions. [2021-07-13 18:28:39,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:39,114 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1339 transitions. [2021-07-13 18:28:39,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 18:28:39,117 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:28:39,117 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:28:39,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 18:28:39,117 INFO L430 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:28:39,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:28:39,118 INFO L82 PathProgramCache]: Analyzing trace with hash 960636576, now seen corresponding path program 1 times [2021-07-13 18:28:39,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:28:39,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826076377] [2021-07-13 18:28:39,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:28:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:39,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:28:39,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:28:39,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826076377] [2021-07-13 18:28:39,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826076377] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:28:39,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:28:39,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 18:28:39,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472514307] [2021-07-13 18:28:39,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 18:28:39,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:28:39,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 18:28:39,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 18:28:39,205 INFO L87 Difference]: Start difference. First operand 532 states and 1339 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:39,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:28:39,348 INFO L93 Difference]: Finished difference Result 752 states and 1944 transitions. [2021-07-13 18:28:39,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 18:28:39,349 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 18:28:39,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:28:39,351 INFO L225 Difference]: With dead ends: 752 [2021-07-13 18:28:39,351 INFO L226 Difference]: Without dead ends: 486 [2021-07-13 18:28:39,351 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 18:28:39,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-07-13 18:28:39,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 454. [2021-07-13 18:28:39,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 452 states have (on average 2.517699115044248) internal successors, (1138), 453 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:39,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1138 transitions. [2021-07-13 18:28:39,361 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1138 transitions. Word has length 41 [2021-07-13 18:28:39,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:28:39,361 INFO L482 AbstractCegarLoop]: Abstraction has 454 states and 1138 transitions. [2021-07-13 18:28:39,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:39,361 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1138 transitions. [2021-07-13 18:28:39,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 18:28:39,362 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:28:39,363 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:28:39,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 18:28:39,363 INFO L430 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:28:39,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:28:39,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1886543070, now seen corresponding path program 2 times [2021-07-13 18:28:39,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:28:39,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912601318] [2021-07-13 18:28:39,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:28:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:39,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:28:39,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:28:39,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912601318] [2021-07-13 18:28:39,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912601318] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:28:39,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:28:39,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 18:28:39,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193292229] [2021-07-13 18:28:39,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 18:28:39,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:28:39,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 18:28:39,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 18:28:39,436 INFO L87 Difference]: Start difference. First operand 454 states and 1138 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:39,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:28:39,502 INFO L93 Difference]: Finished difference Result 305 states and 774 transitions. [2021-07-13 18:28:39,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 18:28:39,507 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 18:28:39,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:28:39,508 INFO L225 Difference]: With dead ends: 305 [2021-07-13 18:28:39,508 INFO L226 Difference]: Without dead ends: 0 [2021-07-13 18:28:39,509 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 18:28:39,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-13 18:28:39,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-13 18:28:39,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:39,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-13 18:28:39,509 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2021-07-13 18:28:39,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:28:39,509 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-13 18:28:39,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:39,510 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-13 18:28:39,510 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-13 18:28:39,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 18:28:39,510 INFO L301 ceAbstractionStarter]: Result for error location thr1Thread1of1ForFork0 was SAFE (1/3) [2021-07-13 18:28:39,512 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-07-13 18:28:39,512 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 18:28:39,512 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 18:28:39,512 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 18:28:39,512 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 18:28:39,513 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 18:28:39,513 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 18:28:39,513 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 18:28:39,513 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 18:28:39,514 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 79 places, 80 transitions, 182 flow [2021-07-13 18:28:39,516 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 115 states, 113 states have (on average 1.831858407079646) internal successors, (207), 114 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:39,516 INFO L276 IsEmpty]: Start isEmpty. Operand has 115 states, 113 states have (on average 1.831858407079646) internal successors, (207), 114 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:39,516 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-13 18:28:39,516 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (2/3) [2021-07-13 18:28:39,517 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-13 18:28:39,517 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 18:28:39,517 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 18:28:39,517 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 18:28:39,517 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 18:28:39,517 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 18:28:39,518 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 18:28:39,518 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 18:28:39,518 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thr2Thread1of1ForFork1======== [2021-07-13 18:28:39,519 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 79 places, 80 transitions, 182 flow [2021-07-13 18:28:39,531 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 919 states, 917 states have (on average 2.802617230098146) internal successors, (2570), 918 states have internal predecessors, (2570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:39,532 INFO L276 IsEmpty]: Start isEmpty. Operand has 919 states, 917 states have (on average 2.802617230098146) internal successors, (2570), 918 states have internal predecessors, (2570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:39,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 18:28:39,533 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:28:39,534 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:28:39,534 INFO L430 AbstractCegarLoop]: === Iteration 1 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:28:39,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:28:39,534 INFO L82 PathProgramCache]: Analyzing trace with hash -679138925, now seen corresponding path program 1 times [2021-07-13 18:28:39,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:28:39,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629210503] [2021-07-13 18:28:39,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:28:39,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:39,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:28:39,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:28:39,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629210503] [2021-07-13 18:28:39,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629210503] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:28:39,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:28:39,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 18:28:39,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001870239] [2021-07-13 18:28:39,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-07-13 18:28:39,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:28:39,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-07-13 18:28:39,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-13 18:28:39,554 INFO L87 Difference]: Start difference. First operand has 919 states, 917 states have (on average 2.802617230098146) internal successors, (2570), 918 states have internal predecessors, (2570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:39,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:28:39,559 INFO L93 Difference]: Finished difference Result 919 states and 2395 transitions. [2021-07-13 18:28:39,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-13 18:28:39,560 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 18:28:39,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:28:39,563 INFO L225 Difference]: With dead ends: 919 [2021-07-13 18:28:39,563 INFO L226 Difference]: Without dead ends: 919 [2021-07-13 18:28:39,563 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-13 18:28:39,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2021-07-13 18:28:39,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 919. [2021-07-13 18:28:39,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 917 states have (on average 2.6117775354416577) internal successors, (2395), 918 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:39,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2395 transitions. [2021-07-13 18:28:39,581 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2395 transitions. Word has length 34 [2021-07-13 18:28:39,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:28:39,582 INFO L482 AbstractCegarLoop]: Abstraction has 919 states and 2395 transitions. [2021-07-13 18:28:39,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:39,582 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2395 transitions. [2021-07-13 18:28:39,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 18:28:39,583 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:28:39,583 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:28:39,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 18:28:39,583 INFO L430 AbstractCegarLoop]: === Iteration 2 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:28:39,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:28:39,583 INFO L82 PathProgramCache]: Analyzing trace with hash -679109134, now seen corresponding path program 1 times [2021-07-13 18:28:39,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:28:39,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007180512] [2021-07-13 18:28:39,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:28:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:39,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:28:39,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:28:39,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007180512] [2021-07-13 18:28:39,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007180512] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:28:39,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:28:39,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 18:28:39,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323554842] [2021-07-13 18:28:39,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 18:28:39,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:28:39,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 18:28:39,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 18:28:39,605 INFO L87 Difference]: Start difference. First operand 919 states and 2395 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:39,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:28:39,620 INFO L93 Difference]: Finished difference Result 878 states and 2233 transitions. [2021-07-13 18:28:39,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 18:28:39,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 18:28:39,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:28:39,623 INFO L225 Difference]: With dead ends: 878 [2021-07-13 18:28:39,623 INFO L226 Difference]: Without dead ends: 526 [2021-07-13 18:28:39,623 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 18:28:39,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-07-13 18:28:39,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2021-07-13 18:28:39,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 524 states have (on average 2.532442748091603) internal successors, (1327), 525 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:39,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 1327 transitions. [2021-07-13 18:28:39,659 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 1327 transitions. Word has length 34 [2021-07-13 18:28:39,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:28:39,659 INFO L482 AbstractCegarLoop]: Abstraction has 526 states and 1327 transitions. [2021-07-13 18:28:39,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:39,660 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 1327 transitions. [2021-07-13 18:28:39,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 18:28:39,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:28:39,661 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:28:39,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-13 18:28:39,661 INFO L430 AbstractCegarLoop]: === Iteration 3 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:28:39,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:28:39,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1635553944, now seen corresponding path program 1 times [2021-07-13 18:28:39,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:28:39,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747747763] [2021-07-13 18:28:39,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:28:39,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:39,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:28:39,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:28:39,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747747763] [2021-07-13 18:28:39,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747747763] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:28:39,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:28:39,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 18:28:39,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128993754] [2021-07-13 18:28:39,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 18:28:39,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:28:39,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 18:28:39,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 18:28:39,711 INFO L87 Difference]: Start difference. First operand 526 states and 1327 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:39,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:28:39,832 INFO L93 Difference]: Finished difference Result 718 states and 1855 transitions. [2021-07-13 18:28:39,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 18:28:39,833 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 18:28:39,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:28:39,835 INFO L225 Difference]: With dead ends: 718 [2021-07-13 18:28:39,835 INFO L226 Difference]: Without dead ends: 490 [2021-07-13 18:28:39,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 18:28:39,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-07-13 18:28:39,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 462. [2021-07-13 18:28:39,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 460 states have (on average 2.5217391304347827) internal successors, (1160), 461 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:39,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1160 transitions. [2021-07-13 18:28:39,844 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1160 transitions. Word has length 41 [2021-07-13 18:28:39,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:28:39,844 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 1160 transitions. [2021-07-13 18:28:39,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:39,844 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1160 transitions. [2021-07-13 18:28:39,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 18:28:39,845 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:28:39,845 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:28:39,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-13 18:28:39,846 INFO L430 AbstractCegarLoop]: === Iteration 4 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:28:39,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:28:39,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1887062586, now seen corresponding path program 2 times [2021-07-13 18:28:39,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:28:39,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537955028] [2021-07-13 18:28:39,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:28:39,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:39,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:28:39,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:28:39,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537955028] [2021-07-13 18:28:39,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537955028] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:28:39,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:28:39,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 18:28:39,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697888547] [2021-07-13 18:28:39,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 18:28:39,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:28:39,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 18:28:39,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 18:28:39,893 INFO L87 Difference]: Start difference. First operand 462 states and 1160 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:39,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:28:39,948 INFO L93 Difference]: Finished difference Result 337 states and 862 transitions. [2021-07-13 18:28:39,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 18:28:39,949 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 18:28:39,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:28:39,949 INFO L225 Difference]: With dead ends: 337 [2021-07-13 18:28:39,949 INFO L226 Difference]: Without dead ends: 0 [2021-07-13 18:28:39,949 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 18:28:39,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-13 18:28:39,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-13 18:28:39,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:39,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-13 18:28:39,950 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2021-07-13 18:28:39,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:28:39,950 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-13 18:28:39,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:39,950 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-13 18:28:39,950 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-13 18:28:39,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-13 18:28:39,951 INFO L301 ceAbstractionStarter]: Result for error location thr2Thread1of1ForFork1 was SAFE (3/3) [2021-07-13 18:28:39,951 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 18:28:39,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 06:28:39 BasicIcfg [2021-07-13 18:28:39,953 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 18:28:39,953 INFO L168 Benchmark]: Toolchain (without parser) took 2259.20 ms. Allocated memory was 170.9 MB in the beginning and 205.5 MB in the end (delta: 34.6 MB). Free memory was 133.0 MB in the beginning and 122.5 MB in the end (delta: 10.5 MB). Peak memory consumption was 45.9 MB. Max. memory is 8.0 GB. [2021-07-13 18:28:39,954 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 170.9 MB. Free memory is still 150.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 18:28:39,954 INFO L168 Benchmark]: CACSL2BoogieTranslator took 442.37 ms. Allocated memory is still 170.9 MB. Free memory was 132.8 MB in the beginning and 145.5 MB in the end (delta: -12.7 MB). Peak memory consumption was 12.4 MB. Max. memory is 8.0 GB. [2021-07-13 18:28:39,954 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.93 ms. Allocated memory is still 170.9 MB. Free memory was 145.5 MB in the beginning and 143.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-13 18:28:39,955 INFO L168 Benchmark]: Boogie Preprocessor took 16.23 ms. Allocated memory is still 170.9 MB. Free memory was 143.4 MB in the beginning and 142.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 18:28:39,955 INFO L168 Benchmark]: RCFGBuilder took 360.23 ms. Allocated memory is still 170.9 MB. Free memory was 142.3 MB in the beginning and 118.7 MB in the end (delta: 23.6 MB). Peak memory consumption was 24.1 MB. Max. memory is 8.0 GB. [2021-07-13 18:28:39,955 INFO L168 Benchmark]: TraceAbstraction took 1389.04 ms. Allocated memory was 170.9 MB in the beginning and 205.5 MB in the end (delta: 34.6 MB). Free memory was 118.7 MB in the beginning and 122.5 MB in the end (delta: -3.7 MB). Peak memory consumption was 31.9 MB. Max. memory is 8.0 GB. [2021-07-13 18:28:39,956 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 170.9 MB. Free memory is still 150.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 442.37 ms. Allocated memory is still 170.9 MB. Free memory was 132.8 MB in the beginning and 145.5 MB in the end (delta: -12.7 MB). Peak memory consumption was 12.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 44.93 ms. Allocated memory is still 170.9 MB. Free memory was 145.5 MB in the beginning and 143.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.23 ms. Allocated memory is still 170.9 MB. Free memory was 143.4 MB in the beginning and 142.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 360.23 ms. Allocated memory is still 170.9 MB. Free memory was 142.3 MB in the beginning and 118.7 MB in the end (delta: 23.6 MB). Peak memory consumption was 24.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1389.04 ms. Allocated memory was 170.9 MB in the beginning and 205.5 MB in the end (delta: 34.6 MB). Free memory was 118.7 MB in the beginning and 122.5 MB in the end (delta: -3.7 MB). Peak memory consumption was 31.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 725]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 753]: 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 for errors in thread instance: thr1Thread1of1ForFork0 with 1 thread instances CFG has 5 procedures, 107 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 869.9ms, OverallIterations: 4, TraceHistogramMax: 1, EmptinessCheckTime: 14.3ms, AutomataDifference: 302.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 68.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 295 SDtfs, 161 SDslu, 444 SDs, 0 SdLazy, 114 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 110.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 129.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=895occurred in iteration=0, InterpolantAutomatonStates: 19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 91.4ms AutomataMinimizationTime, 4 MinimizatonAttempts, 32 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 10.9ms SsaConstructionTime, 52.2ms SatisfiabilityAnalysisTime, 216.0ms InterpolantComputationTime, 138 NumberOfCodeBlocks, 138 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 134 ConstructedInterpolants, 0 QuantifiedInterpolants, 214 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 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 - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 107 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.1ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.5ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 3.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=0, InterpolantAutomatonStates: 0, 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: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: thr2Thread1of1ForFork1 with 1 thread instances CFG has 5 procedures, 107 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 433.2ms, OverallIterations: 4, TraceHistogramMax: 1, EmptinessCheckTime: 4.8ms, AutomataDifference: 211.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 310 SDtfs, 130 SDslu, 507 SDs, 0 SdLazy, 120 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 92.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 99.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=919occurred in iteration=0, InterpolantAutomatonStates: 19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 61.7ms AutomataMinimizationTime, 4 MinimizatonAttempts, 28 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 4.8ms SsaConstructionTime, 13.2ms SatisfiabilityAnalysisTime, 101.2ms InterpolantComputationTime, 150 NumberOfCodeBlocks, 150 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 146 ConstructedInterpolants, 0 QuantifiedInterpolants, 224 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 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 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...