/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-atomic/lamport.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 18:22:17,660 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 18:22:17,662 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 18:22:17,702 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 18:22:17,754 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 18:22:17,754 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 18:22:17,755 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 18:22:17,759 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 18:22:17,793 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 18:22:17,793 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 18:22:17,794 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 18:22:17,794 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 18:22:17,796 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 18:22:17,797 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 18:22:17,797 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 18:22:17,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 18:22:17,797 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 18:22:17,797 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 18:22:17,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 18:22:17,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 18:22:17,798 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 18:22:17,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 18:22:17,799 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 18:22:17,799 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 18:22:17,799 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 18:22:17,799 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 18:22:17,799 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 18:22:17,799 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 18:22:17,799 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 18:22:17,800 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 18:22:17,800 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 18:22:17,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 18:22:17,800 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 18:22:17,800 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 18:22:17,800 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 18:22:17,800 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 18:22:17,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 18:22:17,801 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 18:22:17,801 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 18:22:17,801 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 18:22:18,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 18:22:18,107 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 18:22:18,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 18:22:18,110 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-05 18:22:18,110 INFO L275 PluginConnector]: CDTParser initialized [2021-06-05 18:22:18,110 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/lamport.i [2021-06-05 18:22:18,168 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1079a2dce/4dc302f25ffd4bb9b0459d87f4452db1/FLAGbd384610d [2021-06-05 18:22:18,625 INFO L306 CDTParser]: Found 1 translation units. [2021-06-05 18:22:18,625 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/lamport.i [2021-06-05 18:22:18,636 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1079a2dce/4dc302f25ffd4bb9b0459d87f4452db1/FLAGbd384610d [2021-06-05 18:22:18,941 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1079a2dce/4dc302f25ffd4bb9b0459d87f4452db1 [2021-06-05 18:22:18,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 18:22:18,944 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-05 18:22:18,947 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-05 18:22:18,947 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-05 18:22:18,950 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-05 18:22:18,950 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 06:22:18" (1/1) ... [2021-06-05 18:22:18,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32dfe3dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:22:18, skipping insertion in model container [2021-06-05 18:22:18,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 06:22:18" (1/1) ... [2021-06-05 18:22:18,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-05 18:22:19,014 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-05 18:22:19,130 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2021-06-05 18:22:19,285 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/lamport.i[32156,32169] [2021-06-05 18:22:19,297 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/lamport.i[34083,34096] [2021-06-05 18:22:19,305 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 18:22:19,314 INFO L203 MainTranslator]: Completed pre-run [2021-06-05 18:22:19,337 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2021-06-05 18:22:19,363 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/lamport.i[32156,32169] [2021-06-05 18:22:19,366 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/lamport.i[34083,34096] [2021-06-05 18:22:19,369 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 18:22:19,437 INFO L208 MainTranslator]: Completed translation [2021-06-05 18:22:19,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:22:19 WrapperNode [2021-06-05 18:22:19,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-05 18:22:19,438 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 18:22:19,438 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 18:22:19,438 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 18:22:19,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:22:19" (1/1) ... [2021-06-05 18:22:19,471 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:22:19" (1/1) ... [2021-06-05 18:22:19,488 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 18:22:19,489 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 18:22:19,489 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 18:22:19,489 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 18:22:19,495 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:22:19" (1/1) ... [2021-06-05 18:22:19,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:22:19" (1/1) ... [2021-06-05 18:22:19,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:22:19" (1/1) ... [2021-06-05 18:22:19,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:22:19" (1/1) ... [2021-06-05 18:22:19,517 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:22:19" (1/1) ... [2021-06-05 18:22:19,521 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:22:19" (1/1) ... [2021-06-05 18:22:19,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:22:19" (1/1) ... [2021-06-05 18:22:19,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 18:22:19,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 18:22:19,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 18:22:19,526 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 18:22:19,527 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:22:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 18:22:19,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-06-05 18:22:19,603 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2021-06-05 18:22:19,603 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2021-06-05 18:22:19,603 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2021-06-05 18:22:19,603 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2021-06-05 18:22:19,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-05 18:22:19,604 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-06-05 18:22:19,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-05 18:22:19,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-05 18:22:19,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-05 18:22:19,604 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-06-05 18:22:19,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 18:22:19,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 18:22:19,606 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 18:22:19,983 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 18:22:19,983 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-06-05 18:22:19,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:22:19 BoogieIcfgContainer [2021-06-05 18:22:19,985 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 18:22:19,986 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 18:22:19,986 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 18:22:19,988 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 18:22:19,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.06 06:22:18" (1/3) ... [2021-06-05 18:22:19,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496e11c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:22:19, skipping insertion in model container [2021-06-05 18:22:19,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:22:19" (2/3) ... [2021-06-05 18:22:19,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496e11c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:22:19, skipping insertion in model container [2021-06-05 18:22:19,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:22:19" (3/3) ... [2021-06-05 18:22:19,991 INFO L111 eAbstractionObserver]: Analyzing ICFG lamport.i [2021-06-05 18:22:19,995 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 18:22:19,996 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 18:22:19,996 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-06-05 18:22:19,996 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 18:22:20,020 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,020 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,020 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,021 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,021 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,021 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,021 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,021 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,022 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,022 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,022 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,023 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,023 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,023 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,023 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,023 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,024 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,024 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,024 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,024 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,025 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~x2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,025 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~x2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,025 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,025 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,025 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,026 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,026 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~x2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,026 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~x2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,026 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~x2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,026 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~x2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,027 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,027 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,027 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~b12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,027 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~b12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,027 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~b12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,028 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~b12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,028 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~b12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,028 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~b12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,028 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,028 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,029 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~b12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,029 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~b12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,029 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,029 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,029 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,029 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,030 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,030 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,030 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,030 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,030 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,030 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,031 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,031 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,031 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,032 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,032 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,032 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,032 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,032 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,032 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,032 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,033 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,033 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,033 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,034 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,034 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,034 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,034 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,034 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,034 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,035 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,035 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,035 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,035 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~x1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,035 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~x1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,036 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,036 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,036 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,036 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,037 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~x1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,037 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~x1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,037 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~x1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,037 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~x1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,037 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,037 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,038 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~b21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,038 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~b21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,038 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~b21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,038 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~b21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,038 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~b21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,039 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~b21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,039 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,039 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,039 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~b21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,039 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~b21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,039 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,040 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,040 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,040 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,040 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,040 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,041 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,041 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,041 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,041 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,041 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,041 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,043 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,043 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,043 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,044 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~x2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,044 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,044 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~b12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,044 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,048 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,048 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~b21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,048 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,048 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,048 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,048 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,049 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~x1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:22:20,056 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 18:22:20,074 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 18:22:20,090 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 18:22:20,090 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 18:22:20,090 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 18:22:20,090 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 18:22:20,090 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 18:22:20,091 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 18:22:20,091 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 18:22:20,091 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thr1Thread1of1ForFork1======== [2021-06-05 18:22:20,100 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 112 places, 131 transitions, 284 flow [2021-06-05 18:22:20,288 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 4509 states, 4505 states have (on average 3.331853496115427) internal successors, (15010), 4508 states have internal predecessors, (15010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:20,304 INFO L276 IsEmpty]: Start isEmpty. Operand has 4509 states, 4505 states have (on average 3.331853496115427) internal successors, (15010), 4508 states have internal predecessors, (15010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:20,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 18:22:20,320 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:20,320 INFO L554 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] [2021-06-05 18:22:20,320 INFO L430 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:20,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:20,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1915636410, now seen corresponding path program 1 times [2021-06-05 18:22:20,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:20,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18898594] [2021-06-05 18:22:20,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:20,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:20,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:20,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:20,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18898594] [2021-06-05 18:22:20,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18898594] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:22:20,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:22:20,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 18:22:20,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099632517] [2021-06-05 18:22:20,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-06-05 18:22:20,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:20,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-06-05 18:22:20,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-06-05 18:22:20,572 INFO L87 Difference]: Start difference. First operand has 4509 states, 4505 states have (on average 3.331853496115427) internal successors, (15010), 4508 states have internal predecessors, (15010), 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 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:20,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:20,662 INFO L93 Difference]: Finished difference Result 4509 states and 13402 transitions. [2021-06-05 18:22:20,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-05 18:22:20,664 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 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 25 [2021-06-05 18:22:20,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:20,714 INFO L225 Difference]: With dead ends: 4509 [2021-06-05 18:22:20,714 INFO L226 Difference]: Without dead ends: 3719 [2021-06-05 18:22:20,716 INFO L810 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 [2021-06-05 18:22:20,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3719 states. [2021-06-05 18:22:20,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3719 to 3719. [2021-06-05 18:22:20,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3719 states, 3717 states have (on average 3.022598870056497) internal successors, (11235), 3718 states have internal predecessors, (11235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:20,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3719 states to 3719 states and 11235 transitions. [2021-06-05 18:22:20,942 INFO L78 Accepts]: Start accepts. Automaton has 3719 states and 11235 transitions. Word has length 25 [2021-06-05 18:22:20,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:20,942 INFO L482 AbstractCegarLoop]: Abstraction has 3719 states and 11235 transitions. [2021-06-05 18:22:20,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:20,943 INFO L276 IsEmpty]: Start isEmpty. Operand 3719 states and 11235 transitions. [2021-06-05 18:22:20,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 18:22:20,950 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:20,950 INFO L554 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] [2021-06-05 18:22:20,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 18:22:20,950 INFO L430 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:20,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:20,954 INFO L82 PathProgramCache]: Analyzing trace with hash -977585031, now seen corresponding path program 1 times [2021-06-05 18:22:20,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:20,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415321391] [2021-06-05 18:22:20,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:20,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:21,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:21,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:21,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415321391] [2021-06-05 18:22:21,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415321391] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:22:21,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:22:21,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 18:22:21,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756518802] [2021-06-05 18:22:21,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 18:22:21,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:21,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 18:22:21,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 18:22:21,068 INFO L87 Difference]: Start difference. First operand 3719 states and 11235 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:21,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:21,112 INFO L93 Difference]: Finished difference Result 3550 states and 10686 transitions. [2021-06-05 18:22:21,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 18:22:21,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 18:22:21,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:21,126 INFO L225 Difference]: With dead ends: 3550 [2021-06-05 18:22:21,126 INFO L226 Difference]: Without dead ends: 2675 [2021-06-05 18:22:21,127 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 18:22:21,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2675 states. [2021-06-05 18:22:21,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2675 to 2675. [2021-06-05 18:22:21,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2675 states, 2673 states have (on average 3.0561167227833894) internal successors, (8169), 2674 states have internal predecessors, (8169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:21,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2675 states to 2675 states and 8169 transitions. [2021-06-05 18:22:21,193 INFO L78 Accepts]: Start accepts. Automaton has 2675 states and 8169 transitions. Word has length 33 [2021-06-05 18:22:21,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:21,193 INFO L482 AbstractCegarLoop]: Abstraction has 2675 states and 8169 transitions. [2021-06-05 18:22:21,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:21,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2675 states and 8169 transitions. [2021-06-05 18:22:21,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 18:22:21,200 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:21,200 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:21,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 18:22:21,200 INFO L430 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:21,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:21,201 INFO L82 PathProgramCache]: Analyzing trace with hash -774425511, now seen corresponding path program 1 times [2021-06-05 18:22:21,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:21,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475898919] [2021-06-05 18:22:21,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:21,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:21,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:21,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:21,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475898919] [2021-06-05 18:22:21,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475898919] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:22:21,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:22:21,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 18:22:21,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150883512] [2021-06-05 18:22:21,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 18:22:21,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:21,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 18:22:21,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 18:22:21,254 INFO L87 Difference]: Start difference. First operand 2675 states and 8169 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:21,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:21,421 INFO L93 Difference]: Finished difference Result 5619 states and 17349 transitions. [2021-06-05 18:22:21,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 18:22:21,421 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 50 [2021-06-05 18:22:21,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:21,439 INFO L225 Difference]: With dead ends: 5619 [2021-06-05 18:22:21,439 INFO L226 Difference]: Without dead ends: 3243 [2021-06-05 18:22:21,439 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 18:22:21,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3243 states. [2021-06-05 18:22:21,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3243 to 2931. [2021-06-05 18:22:21,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2931 states, 2929 states have (on average 3.0238989416182998) internal successors, (8857), 2930 states have internal predecessors, (8857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:21,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2931 states to 2931 states and 8857 transitions. [2021-06-05 18:22:21,533 INFO L78 Accepts]: Start accepts. Automaton has 2931 states and 8857 transitions. Word has length 50 [2021-06-05 18:22:21,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:21,534 INFO L482 AbstractCegarLoop]: Abstraction has 2931 states and 8857 transitions. [2021-06-05 18:22:21,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:21,534 INFO L276 IsEmpty]: Start isEmpty. Operand 2931 states and 8857 transitions. [2021-06-05 18:22:21,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 18:22:21,540 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:21,540 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:21,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 18:22:21,540 INFO L430 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:21,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:21,541 INFO L82 PathProgramCache]: Analyzing trace with hash -288204437, now seen corresponding path program 2 times [2021-06-05 18:22:21,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:21,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730427033] [2021-06-05 18:22:21,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:21,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:21,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:21,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730427033] [2021-06-05 18:22:21,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730427033] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:22:21,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:22:21,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 18:22:21,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272813561] [2021-06-05 18:22:21,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 18:22:21,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:21,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 18:22:21,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 18:22:21,604 INFO L87 Difference]: Start difference. First operand 2931 states and 8857 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:21,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:21,686 INFO L93 Difference]: Finished difference Result 8363 states and 25490 transitions. [2021-06-05 18:22:21,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 18:22:21,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 50 [2021-06-05 18:22:21,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:21,729 INFO L225 Difference]: With dead ends: 8363 [2021-06-05 18:22:21,729 INFO L226 Difference]: Without dead ends: 8363 [2021-06-05 18:22:21,730 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 18:22:21,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8363 states. [2021-06-05 18:22:21,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8363 to 3279. [2021-06-05 18:22:21,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3279 states, 3277 states have (on average 3.0241074153188894) internal successors, (9910), 3278 states have internal predecessors, (9910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:21,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3279 states to 3279 states and 9910 transitions. [2021-06-05 18:22:21,899 INFO L78 Accepts]: Start accepts. Automaton has 3279 states and 9910 transitions. Word has length 50 [2021-06-05 18:22:21,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:21,901 INFO L482 AbstractCegarLoop]: Abstraction has 3279 states and 9910 transitions. [2021-06-05 18:22:21,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:21,901 INFO L276 IsEmpty]: Start isEmpty. Operand 3279 states and 9910 transitions. [2021-06-05 18:22:21,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 18:22:21,907 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:21,907 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:21,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 18:22:21,907 INFO L430 AbstractCegarLoop]: === Iteration 5 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:21,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:21,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1400990695, now seen corresponding path program 3 times [2021-06-05 18:22:21,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:21,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772218734] [2021-06-05 18:22:21,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:21,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:21,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:21,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:21,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772218734] [2021-06-05 18:22:21,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772218734] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:22:21,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:22:21,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 18:22:21,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655057586] [2021-06-05 18:22:21,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 18:22:21,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:21,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 18:22:21,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 18:22:21,946 INFO L87 Difference]: Start difference. First operand 3279 states and 9910 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:22,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:22,012 INFO L93 Difference]: Finished difference Result 7829 states and 23559 transitions. [2021-06-05 18:22:22,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 18:22:22,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 50 [2021-06-05 18:22:22,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:22,035 INFO L225 Difference]: With dead ends: 7829 [2021-06-05 18:22:22,035 INFO L226 Difference]: Without dead ends: 7565 [2021-06-05 18:22:22,036 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 18:22:22,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7565 states. [2021-06-05 18:22:22,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7565 to 3579. [2021-06-05 18:22:22,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3579 states, 3577 states have (on average 3.0201285993849596) internal successors, (10803), 3578 states have internal predecessors, (10803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:22,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3579 states to 3579 states and 10803 transitions. [2021-06-05 18:22:22,183 INFO L78 Accepts]: Start accepts. Automaton has 3579 states and 10803 transitions. Word has length 50 [2021-06-05 18:22:22,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:22,184 INFO L482 AbstractCegarLoop]: Abstraction has 3579 states and 10803 transitions. [2021-06-05 18:22:22,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:22,184 INFO L276 IsEmpty]: Start isEmpty. Operand 3579 states and 10803 transitions. [2021-06-05 18:22:22,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 18:22:22,190 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:22,190 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:22,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 18:22:22,190 INFO L430 AbstractCegarLoop]: === Iteration 6 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:22,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:22,191 INFO L82 PathProgramCache]: Analyzing trace with hash 2031652929, now seen corresponding path program 4 times [2021-06-05 18:22:22,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:22,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388745562] [2021-06-05 18:22:22,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:22,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:22,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:22,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:22,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388745562] [2021-06-05 18:22:22,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388745562] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:22:22,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:22:22,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 18:22:22,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983418209] [2021-06-05 18:22:22,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 18:22:22,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:22,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 18:22:22,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 18:22:22,258 INFO L87 Difference]: Start difference. First operand 3579 states and 10803 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:22,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:22,359 INFO L93 Difference]: Finished difference Result 5407 states and 16081 transitions. [2021-06-05 18:22:22,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 18:22:22,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 50 [2021-06-05 18:22:22,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:22,367 INFO L225 Difference]: With dead ends: 5407 [2021-06-05 18:22:22,367 INFO L226 Difference]: Without dead ends: 2257 [2021-06-05 18:22:22,367 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 18:22:22,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-06-05 18:22:22,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2029. [2021-06-05 18:22:22,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2029 states, 2027 states have (on average 2.7168228909718795) internal successors, (5507), 2028 states have internal predecessors, (5507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:22,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 5507 transitions. [2021-06-05 18:22:22,409 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 5507 transitions. Word has length 50 [2021-06-05 18:22:22,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:22,410 INFO L482 AbstractCegarLoop]: Abstraction has 2029 states and 5507 transitions. [2021-06-05 18:22:22,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:22,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 5507 transitions. [2021-06-05 18:22:22,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:22:22,413 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:22,413 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:22,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 18:22:22,414 INFO L430 AbstractCegarLoop]: === Iteration 7 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:22,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:22,414 INFO L82 PathProgramCache]: Analyzing trace with hash -182745444, now seen corresponding path program 1 times [2021-06-05 18:22:22,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:22,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747554300] [2021-06-05 18:22:22,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:22,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:22,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:22,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747554300] [2021-06-05 18:22:22,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747554300] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:22:22,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:22:22,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 18:22:22,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756807279] [2021-06-05 18:22:22,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 18:22:22,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:22,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 18:22:22,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 18:22:22,445 INFO L87 Difference]: Start difference. First operand 2029 states and 5507 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:22,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:22,471 INFO L93 Difference]: Finished difference Result 1906 states and 5003 transitions. [2021-06-05 18:22:22,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 18:22:22,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 55 [2021-06-05 18:22:22,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:22,475 INFO L225 Difference]: With dead ends: 1906 [2021-06-05 18:22:22,475 INFO L226 Difference]: Without dead ends: 1714 [2021-06-05 18:22:22,476 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 18:22:22,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-06-05 18:22:22,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1593. [2021-06-05 18:22:22,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1591 states have (on average 2.6700188560653677) internal successors, (4248), 1592 states have internal predecessors, (4248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:22,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 4248 transitions. [2021-06-05 18:22:22,505 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 4248 transitions. Word has length 55 [2021-06-05 18:22:22,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:22,506 INFO L482 AbstractCegarLoop]: Abstraction has 1593 states and 4248 transitions. [2021-06-05 18:22:22,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:22,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 4248 transitions. [2021-06-05 18:22:22,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:22:22,508 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:22,509 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:22,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 18:22:22,509 INFO L430 AbstractCegarLoop]: === Iteration 8 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:22,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:22,509 INFO L82 PathProgramCache]: Analyzing trace with hash 541407625, now seen corresponding path program 1 times [2021-06-05 18:22:22,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:22,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030833583] [2021-06-05 18:22:22,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:22,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:22,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:22,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:22,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030833583] [2021-06-05 18:22:22,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030833583] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:22:22,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:22:22,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 18:22:22,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087977036] [2021-06-05 18:22:22,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 18:22:22,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:22,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 18:22:22,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 18:22:22,547 INFO L87 Difference]: Start difference. First operand 1593 states and 4248 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:22,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:22,565 INFO L93 Difference]: Finished difference Result 896 states and 2421 transitions. [2021-06-05 18:22:22,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 18:22:22,566 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 55 [2021-06-05 18:22:22,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:22,566 INFO L225 Difference]: With dead ends: 896 [2021-06-05 18:22:22,566 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 18:22:22,566 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 18:22:22,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 18:22:22,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 18:22:22,567 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) [2021-06-05 18:22:22,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 18:22:22,567 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 55 [2021-06-05 18:22:22,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:22,567 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 18:22:22,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:22,567 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 18:22:22,567 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 18:22:22,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 18:22:22,568 INFO L301 ceAbstractionStarter]: Result for error location thr1Thread1of1ForFork1 was SAFE (1/5) [2021-06-05 18:22:22,570 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 18:22:22,571 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 18:22:22,571 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 18:22:22,571 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 18:22:22,571 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 18:22:22,571 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 18:22:22,571 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 18:22:22,571 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 18:22:22,571 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thr2======== [2021-06-05 18:22:22,579 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 112 places, 131 transitions, 284 flow [2021-06-05 18:22:22,705 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 4509 states, 4505 states have (on average 3.331853496115427) internal successors, (15010), 4508 states have internal predecessors, (15010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:22,713 INFO L276 IsEmpty]: Start isEmpty. Operand has 4509 states, 4505 states have (on average 3.331853496115427) internal successors, (15010), 4508 states have internal predecessors, (15010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:22,728 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 18:22:22,729 INFO L301 ceAbstractionStarter]: Result for error location thr2 was SAFE (2/5) [2021-06-05 18:22:22,729 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 18:22:22,730 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 18:22:22,730 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 18:22:22,730 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 18:22:22,730 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 18:22:22,730 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 18:22:22,730 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 18:22:22,730 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 18:22:22,730 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thr1======== [2021-06-05 18:22:22,732 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 112 places, 131 transitions, 284 flow [2021-06-05 18:22:22,827 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 4509 states, 4505 states have (on average 3.331853496115427) internal successors, (15010), 4508 states have internal predecessors, (15010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:22,834 INFO L276 IsEmpty]: Start isEmpty. Operand has 4509 states, 4505 states have (on average 3.331853496115427) internal successors, (15010), 4508 states have internal predecessors, (15010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:22,849 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 18:22:22,850 INFO L301 ceAbstractionStarter]: Result for error location thr1 was SAFE (3/5) [2021-06-05 18:22:22,851 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-05 18:22:22,852 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 18:22:22,852 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 18:22:22,852 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 18:22:22,852 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 18:22:22,852 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 18:22:22,852 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 18:22:22,852 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 18:22:22,852 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 18:22:22,853 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 112 places, 131 transitions, 284 flow [2021-06-05 18:22:22,943 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 4509 states, 4505 states have (on average 3.331853496115427) internal successors, (15010), 4508 states have internal predecessors, (15010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:22,950 INFO L276 IsEmpty]: Start isEmpty. Operand has 4509 states, 4505 states have (on average 3.331853496115427) internal successors, (15010), 4508 states have internal predecessors, (15010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:22,965 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 18:22:22,965 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (4/5) [2021-06-05 18:22:22,966 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 18:22:22,966 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 18:22:22,967 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 18:22:22,967 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 18:22:22,967 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 18:22:22,967 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 18:22:22,967 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 18:22:22,967 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 18:22:22,967 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thr2Thread1of1ForFork0======== [2021-06-05 18:22:22,968 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 112 places, 131 transitions, 284 flow [2021-06-05 18:22:23,055 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 4509 states, 4505 states have (on average 3.331853496115427) internal successors, (15010), 4508 states have internal predecessors, (15010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:23,062 INFO L276 IsEmpty]: Start isEmpty. Operand has 4509 states, 4505 states have (on average 3.331853496115427) internal successors, (15010), 4508 states have internal predecessors, (15010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:23,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 18:22:23,063 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:23,063 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:23,063 INFO L430 AbstractCegarLoop]: === Iteration 1 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:23,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:23,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1479514535, now seen corresponding path program 1 times [2021-06-05 18:22:23,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:23,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244763138] [2021-06-05 18:22:23,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:23,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:23,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244763138] [2021-06-05 18:22:23,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244763138] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:22:23,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:22:23,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 18:22:23,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170434636] [2021-06-05 18:22:23,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-06-05 18:22:23,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:23,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-06-05 18:22:23,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-06-05 18:22:23,085 INFO L87 Difference]: Start difference. First operand has 4509 states, 4505 states have (on average 3.331853496115427) internal successors, (15010), 4508 states have internal predecessors, (15010), 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 15.5) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:23,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:23,108 INFO L93 Difference]: Finished difference Result 4509 states and 13402 transitions. [2021-06-05 18:22:23,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-05 18:22:23,108 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 18:22:23,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:23,117 INFO L225 Difference]: With dead ends: 4509 [2021-06-05 18:22:23,117 INFO L226 Difference]: Without dead ends: 3749 [2021-06-05 18:22:23,117 INFO L810 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 [2021-06-05 18:22:23,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3749 states. [2021-06-05 18:22:23,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3749 to 3749. [2021-06-05 18:22:23,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3749 states, 3747 states have (on average 3.014411529223379) internal successors, (11295), 3748 states have internal predecessors, (11295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:23,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3749 states to 3749 states and 11295 transitions. [2021-06-05 18:22:23,241 INFO L78 Accepts]: Start accepts. Automaton has 3749 states and 11295 transitions. Word has length 31 [2021-06-05 18:22:23,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:23,242 INFO L482 AbstractCegarLoop]: Abstraction has 3749 states and 11295 transitions. [2021-06-05 18:22:23,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:23,242 INFO L276 IsEmpty]: Start isEmpty. Operand 3749 states and 11295 transitions. [2021-06-05 18:22:23,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 18:22:23,244 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:23,244 INFO L554 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] [2021-06-05 18:22:23,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 18:22:23,244 INFO L430 AbstractCegarLoop]: === Iteration 2 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:23,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:23,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1653746266, now seen corresponding path program 1 times [2021-06-05 18:22:23,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:23,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643764011] [2021-06-05 18:22:23,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:23,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:23,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:23,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:23,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643764011] [2021-06-05 18:22:23,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643764011] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:22:23,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:22:23,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 18:22:23,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948157638] [2021-06-05 18:22:23,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 18:22:23,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:23,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 18:22:23,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 18:22:23,292 INFO L87 Difference]: Start difference. First operand 3749 states and 11295 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:23,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:23,316 INFO L93 Difference]: Finished difference Result 3592 states and 10770 transitions. [2021-06-05 18:22:23,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 18:22:23,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 18:22:23,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:23,323 INFO L225 Difference]: With dead ends: 3592 [2021-06-05 18:22:23,323 INFO L226 Difference]: Without dead ends: 2669 [2021-06-05 18:22:23,324 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 18:22:23,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2669 states. [2021-06-05 18:22:23,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2669 to 2669. [2021-06-05 18:22:23,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2669 states, 2667 states have (on average 3.0584926884139483) internal successors, (8157), 2668 states have internal predecessors, (8157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:23,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2669 states to 2669 states and 8157 transitions. [2021-06-05 18:22:23,391 INFO L78 Accepts]: Start accepts. Automaton has 2669 states and 8157 transitions. Word has length 39 [2021-06-05 18:22:23,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:23,391 INFO L482 AbstractCegarLoop]: Abstraction has 2669 states and 8157 transitions. [2021-06-05 18:22:23,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:23,391 INFO L276 IsEmpty]: Start isEmpty. Operand 2669 states and 8157 transitions. [2021-06-05 18:22:23,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 18:22:23,396 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:23,397 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:23,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 18:22:23,397 INFO L430 AbstractCegarLoop]: === Iteration 3 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:23,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:23,401 INFO L82 PathProgramCache]: Analyzing trace with hash 300629937, now seen corresponding path program 1 times [2021-06-05 18:22:23,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:23,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15871435] [2021-06-05 18:22:23,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:23,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:23,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:23,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:23,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15871435] [2021-06-05 18:22:23,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15871435] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:22:23,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:22:23,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 18:22:23,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585962162] [2021-06-05 18:22:23,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 18:22:23,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:23,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 18:22:23,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 18:22:23,436 INFO L87 Difference]: Start difference. First operand 2669 states and 8157 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:23,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:23,553 INFO L93 Difference]: Finished difference Result 5649 states and 17436 transitions. [2021-06-05 18:22:23,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 18:22:23,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 50 [2021-06-05 18:22:23,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:23,563 INFO L225 Difference]: With dead ends: 5649 [2021-06-05 18:22:23,563 INFO L226 Difference]: Without dead ends: 3165 [2021-06-05 18:22:23,564 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 18:22:23,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3165 states. [2021-06-05 18:22:23,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3165 to 2933. [2021-06-05 18:22:23,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2933 states, 2931 states have (on average 3.025247355851245) internal successors, (8867), 2932 states have internal predecessors, (8867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:23,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2933 states to 2933 states and 8867 transitions. [2021-06-05 18:22:23,632 INFO L78 Accepts]: Start accepts. Automaton has 2933 states and 8867 transitions. Word has length 50 [2021-06-05 18:22:23,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:23,632 INFO L482 AbstractCegarLoop]: Abstraction has 2933 states and 8867 transitions. [2021-06-05 18:22:23,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:23,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2933 states and 8867 transitions. [2021-06-05 18:22:23,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 18:22:23,637 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:23,637 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:23,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 18:22:23,637 INFO L430 AbstractCegarLoop]: === Iteration 4 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:23,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:23,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1631964529, now seen corresponding path program 2 times [2021-06-05 18:22:23,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:23,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431960139] [2021-06-05 18:22:23,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:23,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:23,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431960139] [2021-06-05 18:22:23,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431960139] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:22:23,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:22:23,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 18:22:23,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595693093] [2021-06-05 18:22:23,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 18:22:23,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:23,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 18:22:23,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 18:22:23,670 INFO L87 Difference]: Start difference. First operand 2933 states and 8867 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:23,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:23,743 INFO L93 Difference]: Finished difference Result 8313 states and 25345 transitions. [2021-06-05 18:22:23,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 18:22:23,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 50 [2021-06-05 18:22:23,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:23,769 INFO L225 Difference]: With dead ends: 8313 [2021-06-05 18:22:23,769 INFO L226 Difference]: Without dead ends: 8313 [2021-06-05 18:22:23,771 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 18:22:23,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8313 states. [2021-06-05 18:22:23,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8313 to 3261. [2021-06-05 18:22:23,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3261 states, 3259 states have (on average 3.0257747775391226) internal successors, (9861), 3260 states have internal predecessors, (9861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:23,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3261 states to 3261 states and 9861 transitions. [2021-06-05 18:22:23,902 INFO L78 Accepts]: Start accepts. Automaton has 3261 states and 9861 transitions. Word has length 50 [2021-06-05 18:22:23,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:23,902 INFO L482 AbstractCegarLoop]: Abstraction has 3261 states and 9861 transitions. [2021-06-05 18:22:23,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:23,903 INFO L276 IsEmpty]: Start isEmpty. Operand 3261 states and 9861 transitions. [2021-06-05 18:22:23,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 18:22:23,906 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:23,907 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:23,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 18:22:23,907 INFO L430 AbstractCegarLoop]: === Iteration 5 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:23,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:23,907 INFO L82 PathProgramCache]: Analyzing trace with hash 519178271, now seen corresponding path program 3 times [2021-06-05 18:22:23,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:23,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451813583] [2021-06-05 18:22:23,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:23,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:23,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:23,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451813583] [2021-06-05 18:22:23,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451813583] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:22:23,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:22:23,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 18:22:23,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122107615] [2021-06-05 18:22:23,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 18:22:23,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:23,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 18:22:23,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 18:22:23,943 INFO L87 Difference]: Start difference. First operand 3261 states and 9861 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:23,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:23,997 INFO L93 Difference]: Finished difference Result 7811 states and 23482 transitions. [2021-06-05 18:22:23,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 18:22:23,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 50 [2021-06-05 18:22:23,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:24,018 INFO L225 Difference]: With dead ends: 7811 [2021-06-05 18:22:24,018 INFO L226 Difference]: Without dead ends: 7535 [2021-06-05 18:22:24,018 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 18:22:24,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7535 states. [2021-06-05 18:22:24,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7535 to 3577. [2021-06-05 18:22:24,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3577 states, 3575 states have (on average 3.0204195804195804) internal successors, (10798), 3576 states have internal predecessors, (10798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:24,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3577 states to 3577 states and 10798 transitions. [2021-06-05 18:22:24,119 INFO L78 Accepts]: Start accepts. Automaton has 3577 states and 10798 transitions. Word has length 50 [2021-06-05 18:22:24,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:24,119 INFO L482 AbstractCegarLoop]: Abstraction has 3577 states and 10798 transitions. [2021-06-05 18:22:24,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:24,119 INFO L276 IsEmpty]: Start isEmpty. Operand 3577 states and 10798 transitions. [2021-06-05 18:22:24,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 18:22:24,124 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:24,124 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:24,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 18:22:24,124 INFO L430 AbstractCegarLoop]: === Iteration 6 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:24,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:24,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1856758831, now seen corresponding path program 4 times [2021-06-05 18:22:24,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:24,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508031597] [2021-06-05 18:22:24,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:24,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:24,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:24,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:24,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508031597] [2021-06-05 18:22:24,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508031597] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:22:24,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:22:24,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 18:22:24,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150954470] [2021-06-05 18:22:24,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 18:22:24,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:24,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 18:22:24,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 18:22:24,155 INFO L87 Difference]: Start difference. First operand 3577 states and 10798 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:24,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:24,250 INFO L93 Difference]: Finished difference Result 5277 states and 15700 transitions. [2021-06-05 18:22:24,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 18:22:24,250 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 50 [2021-06-05 18:22:24,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:24,255 INFO L225 Difference]: With dead ends: 5277 [2021-06-05 18:22:24,255 INFO L226 Difference]: Without dead ends: 2257 [2021-06-05 18:22:24,255 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 18:22:24,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-06-05 18:22:24,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2029. [2021-06-05 18:22:24,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2029 states, 2027 states have (on average 2.7168228909718795) internal successors, (5507), 2028 states have internal predecessors, (5507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:24,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 5507 transitions. [2021-06-05 18:22:24,288 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 5507 transitions. Word has length 50 [2021-06-05 18:22:24,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:24,289 INFO L482 AbstractCegarLoop]: Abstraction has 2029 states and 5507 transitions. [2021-06-05 18:22:24,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:24,289 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 5507 transitions. [2021-06-05 18:22:24,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:22:24,291 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:24,292 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:24,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 18:22:24,292 INFO L430 AbstractCegarLoop]: === Iteration 7 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:24,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:24,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1737423522, now seen corresponding path program 1 times [2021-06-05 18:22:24,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:24,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244288894] [2021-06-05 18:22:24,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:24,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:24,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:24,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:24,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244288894] [2021-06-05 18:22:24,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244288894] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:22:24,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:22:24,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 18:22:24,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925127646] [2021-06-05 18:22:24,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 18:22:24,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:24,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 18:22:24,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 18:22:24,322 INFO L87 Difference]: Start difference. First operand 2029 states and 5507 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:24,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:24,349 INFO L93 Difference]: Finished difference Result 1817 states and 4792 transitions. [2021-06-05 18:22:24,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 18:22:24,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 55 [2021-06-05 18:22:24,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:24,352 INFO L225 Difference]: With dead ends: 1817 [2021-06-05 18:22:24,352 INFO L226 Difference]: Without dead ends: 1657 [2021-06-05 18:22:24,353 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 18:22:24,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-06-05 18:22:24,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1585. [2021-06-05 18:22:24,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1583 states have (on average 2.669614655716993) internal successors, (4226), 1584 states have internal predecessors, (4226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:24,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 4226 transitions. [2021-06-05 18:22:24,379 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 4226 transitions. Word has length 55 [2021-06-05 18:22:24,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:24,379 INFO L482 AbstractCegarLoop]: Abstraction has 1585 states and 4226 transitions. [2021-06-05 18:22:24,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:24,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 4226 transitions. [2021-06-05 18:22:24,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:22:24,381 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:24,381 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:24,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-05 18:22:24,382 INFO L430 AbstractCegarLoop]: === Iteration 8 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:24,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:24,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1749463747, now seen corresponding path program 1 times [2021-06-05 18:22:24,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:24,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274701169] [2021-06-05 18:22:24,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:24,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:24,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:24,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:24,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274701169] [2021-06-05 18:22:24,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274701169] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:22:24,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:22:24,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 18:22:24,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64986905] [2021-06-05 18:22:24,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 18:22:24,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:24,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 18:22:24,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 18:22:24,411 INFO L87 Difference]: Start difference. First operand 1585 states and 4226 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:24,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:24,431 INFO L93 Difference]: Finished difference Result 928 states and 2509 transitions. [2021-06-05 18:22:24,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 18:22:24,431 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 55 [2021-06-05 18:22:24,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:24,431 INFO L225 Difference]: With dead ends: 928 [2021-06-05 18:22:24,432 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 18:22:24,432 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 18:22:24,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 18:22:24,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 18:22:24,432 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) [2021-06-05 18:22:24,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 18:22:24,433 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 55 [2021-06-05 18:22:24,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:24,433 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 18:22:24,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:24,433 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 18:22:24,433 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 18:22:24,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-05 18:22:24,433 INFO L301 ceAbstractionStarter]: Result for error location thr2Thread1of1ForFork0 was SAFE (5/5) [2021-06-05 18:22:24,434 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 18:22:24,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 06:22:24 BasicIcfg [2021-06-05 18:22:24,436 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 18:22:24,437 INFO L168 Benchmark]: Toolchain (without parser) took 5493.44 ms. Allocated memory was 394.3 MB in the beginning and 838.9 MB in the end (delta: 444.6 MB). Free memory was 357.2 MB in the beginning and 514.2 MB in the end (delta: -157.0 MB). Peak memory consumption was 289.6 MB. Max. memory is 16.0 GB. [2021-06-05 18:22:24,437 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 394.3 MB. Free memory was 375.0 MB in the beginning and 375.0 MB in the end (delta: 65.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 18:22:24,438 INFO L168 Benchmark]: CACSL2BoogieTranslator took 490.88 ms. Allocated memory is still 394.3 MB. Free memory was 357.0 MB in the beginning and 357.5 MB in the end (delta: -412.4 kB). Peak memory consumption was 7.5 MB. Max. memory is 16.0 GB. [2021-06-05 18:22:24,438 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.00 ms. Allocated memory is still 394.3 MB. Free memory was 357.5 MB in the beginning and 355.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 18:22:24,438 INFO L168 Benchmark]: Boogie Preprocessor took 36.51 ms. Allocated memory is still 394.3 MB. Free memory was 355.4 MB in the beginning and 353.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 18:22:24,438 INFO L168 Benchmark]: RCFGBuilder took 458.99 ms. Allocated memory is still 394.3 MB. Free memory was 353.3 MB in the beginning and 325.0 MB in the end (delta: 28.3 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. [2021-06-05 18:22:24,439 INFO L168 Benchmark]: TraceAbstraction took 4450.25 ms. Allocated memory was 394.3 MB in the beginning and 838.9 MB in the end (delta: 444.6 MB). Free memory was 325.0 MB in the beginning and 514.2 MB in the end (delta: -189.3 MB). Peak memory consumption was 256.4 MB. Max. memory is 16.0 GB. [2021-06-05 18:22:24,440 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 394.3 MB. Free memory was 375.0 MB in the beginning and 375.0 MB in the end (delta: 65.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 490.88 ms. Allocated memory is still 394.3 MB. Free memory was 357.0 MB in the beginning and 357.5 MB in the end (delta: -412.4 kB). Peak memory consumption was 7.5 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 50.00 ms. Allocated memory is still 394.3 MB. Free memory was 357.5 MB in the beginning and 355.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 36.51 ms. Allocated memory is still 394.3 MB. Free memory was 355.4 MB in the beginning and 353.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 458.99 ms. Allocated memory is still 394.3 MB. Free memory was 353.3 MB in the beginning and 325.0 MB in the end (delta: 28.3 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 4450.25 ms. Allocated memory was 394.3 MB in the beginning and 838.9 MB in the end (delta: 444.6 MB). Free memory was 325.0 MB in the beginning and 514.2 MB in the end (delta: -189.3 MB). Peak memory consumption was 256.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 764]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 834]: 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: thr1Thread1of1ForFork1 with 1 thread instances CFG has 5 procedures, 172 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2479.9ms, OverallIterations: 8, TraceHistogramMax: 1, EmptinessCheckTime: 67.3ms, AutomataDifference: 794.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 197.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1179 SDtfs, 738 SDslu, 1347 SDs, 0 SdLazy, 205 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 167.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4509occurred in iteration=0, InterpolantAutomatonStates: 31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 761.4ms AutomataMinimizationTime, 8 MinimizatonAttempts, 9731 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 27.9ms SsaConstructionTime, 149.1ms SatisfiabilityAnalysisTime, 273.1ms InterpolantComputationTime, 368 NumberOfCodeBlocks, 368 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 360 ConstructedInterpolants, 0 QuantifiedInterpolants, 472 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 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: thr2 with 1 thread instances CFG has 5 procedures, 172 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 158.0ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 23.3ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 134.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4509occurred 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: thr1 with 1 thread instances CFG has 5 procedures, 172 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 119.9ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 22.3ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 96.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4509occurred 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: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 172 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 113.6ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 21.9ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 90.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4509occurred 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: thr2Thread1of1ForFork0 with 1 thread instances CFG has 5 procedures, 172 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1466.9ms, OverallIterations: 8, TraceHistogramMax: 1, EmptinessCheckTime: 31.4ms, AutomataDifference: 531.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 88.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1207 SDtfs, 689 SDslu, 1385 SDs, 0 SdLazy, 209 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 163.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4509occurred in iteration=0, InterpolantAutomatonStates: 31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 548.2ms AutomataMinimizationTime, 8 MinimizatonAttempts, 9542 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 8.7ms SsaConstructionTime, 33.7ms SatisfiabilityAnalysisTime, 159.8ms InterpolantComputationTime, 380 NumberOfCodeBlocks, 380 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 372 ConstructedInterpolants, 0 QuantifiedInterpolants, 488 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 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...