/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/17_szymanski.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 15:31:23,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 15:31:23,289 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 15:31:23,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 15:31:23,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-12 15:31:23,366 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-12 15:31:23,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-12 15:31:23,369 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-12 15:31:23,397 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 15:31:23,397 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 15:31:23,398 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 15:31:23,398 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 15:31:23,399 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 15:31:23,399 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 15:31:23,400 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 15:31:23,400 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 15:31:23,400 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 15:31:23,400 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 15:31:23,401 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 15:31:23,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 15:31:23,401 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 15:31:23,401 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 15:31:23,401 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 15:31:23,401 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 15:31:23,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 15:31:23,401 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 15:31:23,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 15:31:23,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 15:31:23,402 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 15:31:23,402 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 15:31:23,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 15:31:23,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 15:31:23,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 15:31:23,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 15:31:23,402 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 15:31:23,402 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 15:31:23,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 15:31:23,403 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 15:31:23,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 15:31:23,403 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 15:31:23,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 15:31:23,678 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 15:31:23,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 15:31:23,681 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-12 15:31:23,681 INFO L275 PluginConnector]: CDTParser initialized [2021-06-12 15:31:23,682 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/17_szymanski.i [2021-06-12 15:31:23,733 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/966a0038a/e2f11328249d4af7b6cefc34a7299fb8/FLAGef349d5fb [2021-06-12 15:31:24,080 INFO L306 CDTParser]: Found 1 translation units. [2021-06-12 15:31:24,080 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/17_szymanski.i [2021-06-12 15:31:24,101 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/966a0038a/e2f11328249d4af7b6cefc34a7299fb8/FLAGef349d5fb [2021-06-12 15:31:24,476 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/966a0038a/e2f11328249d4af7b6cefc34a7299fb8 [2021-06-12 15:31:24,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 15:31:24,479 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-12 15:31:24,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-12 15:31:24,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-12 15:31:24,483 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-12 15:31:24,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.06 03:31:24" (1/1) ... [2021-06-12 15:31:24,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ed20202 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:31:24, skipping insertion in model container [2021-06-12 15:31:24,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.06 03:31:24" (1/1) ... [2021-06-12 15:31:24,489 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-12 15:31:24,509 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-12 15:31:24,739 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-ext/17_szymanski.i[30132,30145] [2021-06-12 15:31:24,752 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-ext/17_szymanski.i[30481,30494] [2021-06-12 15:31:24,764 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-12 15:31:24,775 INFO L203 MainTranslator]: Completed pre-run [2021-06-12 15:31:24,812 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-ext/17_szymanski.i[30132,30145] [2021-06-12 15:31:24,813 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-ext/17_szymanski.i[30481,30494] [2021-06-12 15:31:24,815 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-12 15:31:24,866 INFO L208 MainTranslator]: Completed translation [2021-06-12 15:31:24,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:31:24 WrapperNode [2021-06-12 15:31:24,867 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-12 15:31:24,868 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 15:31:24,868 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 15:31:24,868 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 15:31:24,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:31:24" (1/1) ... [2021-06-12 15:31:24,893 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:31:24" (1/1) ... [2021-06-12 15:31:24,908 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 15:31:24,909 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 15:31:24,909 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 15:31:24,909 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 15:31:24,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:31:24" (1/1) ... [2021-06-12 15:31:24,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:31:24" (1/1) ... [2021-06-12 15:31:24,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:31:24" (1/1) ... [2021-06-12 15:31:24,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:31:24" (1/1) ... [2021-06-12 15:31:24,918 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:31:24" (1/1) ... [2021-06-12 15:31:24,922 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:31:24" (1/1) ... [2021-06-12 15:31:24,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:31:24" (1/1) ... [2021-06-12 15:31:24,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 15:31:24,925 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 15:31:24,926 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 15:31:24,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 15:31:24,933 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:31:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 15:31:24,987 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2021-06-12 15:31:24,987 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2021-06-12 15:31:24,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-12 15:31:24,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-12 15:31:24,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-12 15:31:24,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-12 15:31:24,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 15:31:24,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 15:31:24,989 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 15:31:25,288 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 15:31:25,288 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2021-06-12 15:31:25,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 03:31:25 BoogieIcfgContainer [2021-06-12 15:31:25,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 15:31:25,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 15:31:25,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 15:31:25,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 15:31:25,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.06 03:31:24" (1/3) ... [2021-06-12 15:31:25,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@527b258b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 03:31:25, skipping insertion in model container [2021-06-12 15:31:25,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:31:24" (2/3) ... [2021-06-12 15:31:25,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@527b258b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 03:31:25, skipping insertion in model container [2021-06-12 15:31:25,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 03:31:25" (3/3) ... [2021-06-12 15:31:25,296 INFO L111 eAbstractionObserver]: Analyzing ICFG 17_szymanski.i [2021-06-12 15:31:25,305 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 15:31:25,305 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 15:31:25,305 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-06-12 15:31:25,306 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 15:31:25,331 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:31:25,331 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:31:25,331 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:31:25,331 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:31:25,331 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:31:25,331 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:31:25,331 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:31:25,331 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:31:25,332 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:31:25,332 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:31:25,332 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:31:25,332 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:31:25,335 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:31:25,335 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:31:25,335 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:31:25,335 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:31:25,339 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-12 15:31:25,354 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-12 15:31:25,375 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 15:31:25,376 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 15:31:25,376 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 15:31:25,376 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 15:31:25,376 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 15:31:25,376 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 15:31:25,376 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 15:31:25,376 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thr1======== [2021-06-12 15:31:25,385 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 71 places, 91 transitions, 187 flow [2021-06-12 15:31:25,420 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 637 states, 633 states have (on average 2.8720379146919433) internal successors, (1818), 636 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:25,423 INFO L276 IsEmpty]: Start isEmpty. Operand has 637 states, 633 states have (on average 2.8720379146919433) internal successors, (1818), 636 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:25,447 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-12 15:31:25,448 INFO L301 ceAbstractionStarter]: Result for error location thr1 was SAFE (1/3) [2021-06-12 15:31:25,450 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-12 15:31:25,452 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 15:31:25,452 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 15:31:25,452 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 15:31:25,452 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 15:31:25,452 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 15:31:25,452 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 15:31:25,452 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 15:31:25,452 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thr1Thread1of1ForFork0======== [2021-06-12 15:31:25,454 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 71 places, 91 transitions, 187 flow [2021-06-12 15:31:25,461 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 637 states, 633 states have (on average 2.8720379146919433) internal successors, (1818), 636 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:25,462 INFO L276 IsEmpty]: Start isEmpty. Operand has 637 states, 633 states have (on average 2.8720379146919433) internal successors, (1818), 636 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:25,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 15:31:25,462 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:25,463 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:25,463 INFO L430 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:25,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:25,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1300194564, now seen corresponding path program 1 times [2021-06-12 15:31:25,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:25,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165589118] [2021-06-12 15:31:25,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:25,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:25,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:25,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:25,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165589118] [2021-06-12 15:31:25,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165589118] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:31:25,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:31:25,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 15:31:25,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793918028] [2021-06-12 15:31:25,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-06-12 15:31:25,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:25,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-06-12 15:31:25,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-06-12 15:31:25,645 INFO L87 Difference]: Start difference. First operand has 637 states, 633 states have (on average 2.8720379146919433) internal successors, (1818), 636 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:25,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:25,661 INFO L93 Difference]: Finished difference Result 353 states and 874 transitions. [2021-06-12 15:31:25,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-12 15:31:25,662 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 15:31:25,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:25,670 INFO L225 Difference]: With dead ends: 353 [2021-06-12 15:31:25,670 INFO L226 Difference]: Without dead ends: 353 [2021-06-12 15:31:25,671 INFO L728 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 [2021-06-12 15:31:25,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-12 15:31:25,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2021-06-12 15:31:25,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.4829545454545454) internal successors, (874), 352 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:25,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 874 transitions. [2021-06-12 15:31:25,712 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 874 transitions. Word has length 28 [2021-06-12 15:31:25,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:25,712 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 874 transitions. [2021-06-12 15:31:25,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:25,712 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 874 transitions. [2021-06-12 15:31:25,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 15:31:25,713 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:25,713 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:25,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 15:31:25,714 INFO L430 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:25,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:25,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1251932606, now seen corresponding path program 1 times [2021-06-12 15:31:25,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:25,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303872770] [2021-06-12 15:31:25,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:25,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:25,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:25,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303872770] [2021-06-12 15:31:25,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303872770] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:31:25,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:31:25,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 15:31:25,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894281112] [2021-06-12 15:31:25,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 15:31:25,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:25,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 15:31:25,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 15:31:25,759 INFO L87 Difference]: Start difference. First operand 353 states and 874 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:25,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:25,779 INFO L93 Difference]: Finished difference Result 546 states and 1391 transitions. [2021-06-12 15:31:25,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 15:31:25,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 15:31:25,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:25,782 INFO L225 Difference]: With dead ends: 546 [2021-06-12 15:31:25,782 INFO L226 Difference]: Without dead ends: 481 [2021-06-12 15:31:25,783 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 15:31:25,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-12 15:31:25,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 327. [2021-06-12 15:31:25,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.496932515337423) internal successors, (814), 326 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:25,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 814 transitions. [2021-06-12 15:31:25,798 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 814 transitions. Word has length 28 [2021-06-12 15:31:25,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:25,798 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 814 transitions. [2021-06-12 15:31:25,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:25,799 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 814 transitions. [2021-06-12 15:31:25,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-12 15:31:25,801 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:25,801 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:25,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 15:31:25,801 INFO L430 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:25,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:25,802 INFO L82 PathProgramCache]: Analyzing trace with hash -376260015, now seen corresponding path program 1 times [2021-06-12 15:31:25,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:25,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778500515] [2021-06-12 15:31:25,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:25,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:25,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:25,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:25,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778500515] [2021-06-12 15:31:25,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778500515] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:31:25,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:31:25,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 15:31:25,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608248558] [2021-06-12 15:31:25,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 15:31:25,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:25,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 15:31:25,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 15:31:25,872 INFO L87 Difference]: Start difference. First operand 327 states and 814 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:25,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:25,931 INFO L93 Difference]: Finished difference Result 349 states and 852 transitions. [2021-06-12 15:31:25,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 15:31:25,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-12 15:31:25,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:25,933 INFO L225 Difference]: With dead ends: 349 [2021-06-12 15:31:25,933 INFO L226 Difference]: Without dead ends: 349 [2021-06-12 15:31:25,934 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 15:31:25,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-12 15:31:25,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2021-06-12 15:31:25,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.4482758620689653) internal successors, (852), 348 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:25,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 852 transitions. [2021-06-12 15:31:25,944 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 852 transitions. Word has length 42 [2021-06-12 15:31:25,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:25,944 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 852 transitions. [2021-06-12 15:31:25,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:25,945 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 852 transitions. [2021-06-12 15:31:25,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-12 15:31:25,945 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:25,946 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:25,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 15:31:25,946 INFO L430 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:25,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:25,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1907683389, now seen corresponding path program 2 times [2021-06-12 15:31:25,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:25,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319652462] [2021-06-12 15:31:25,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:25,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:25,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:25,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:25,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319652462] [2021-06-12 15:31:25,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319652462] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:31:25,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:31:25,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 15:31:25,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594558865] [2021-06-12 15:31:25,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 15:31:25,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:25,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 15:31:25,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 15:31:25,989 INFO L87 Difference]: Start difference. First operand 349 states and 852 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:26,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:26,029 INFO L93 Difference]: Finished difference Result 343 states and 809 transitions. [2021-06-12 15:31:26,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 15:31:26,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-12 15:31:26,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:26,032 INFO L225 Difference]: With dead ends: 343 [2021-06-12 15:31:26,032 INFO L226 Difference]: Without dead ends: 343 [2021-06-12 15:31:26,032 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 15:31:26,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-06-12 15:31:26,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 341. [2021-06-12 15:31:26,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.364705882352941) internal successors, (804), 340 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:26,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 804 transitions. [2021-06-12 15:31:26,051 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 804 transitions. Word has length 42 [2021-06-12 15:31:26,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:26,051 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 804 transitions. [2021-06-12 15:31:26,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:26,051 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 804 transitions. [2021-06-12 15:31:26,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-12 15:31:26,052 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:26,052 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:26,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 15:31:26,053 INFO L430 AbstractCegarLoop]: === Iteration 5 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:26,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:26,053 INFO L82 PathProgramCache]: Analyzing trace with hash -282369101, now seen corresponding path program 3 times [2021-06-12 15:31:26,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:26,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092822196] [2021-06-12 15:31:26,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:26,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:26,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092822196] [2021-06-12 15:31:26,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092822196] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:31:26,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:31:26,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 15:31:26,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915887236] [2021-06-12 15:31:26,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 15:31:26,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:26,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 15:31:26,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 15:31:26,093 INFO L87 Difference]: Start difference. First operand 341 states and 804 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:26,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:26,118 INFO L93 Difference]: Finished difference Result 324 states and 743 transitions. [2021-06-12 15:31:26,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 15:31:26,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-12 15:31:26,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:26,123 INFO L225 Difference]: With dead ends: 324 [2021-06-12 15:31:26,123 INFO L226 Difference]: Without dead ends: 0 [2021-06-12 15:31:26,127 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 15:31:26,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-12 15:31:26,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-12 15:31:26,130 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) [2021-06-12 15:31:26,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-12 15:31:26,130 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 42 [2021-06-12 15:31:26,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:26,130 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-12 15:31:26,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:26,130 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-12 15:31:26,130 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-12 15:31:26,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 15:31:26,130 INFO L301 ceAbstractionStarter]: Result for error location thr1Thread1of1ForFork0 was SAFE (2/3) [2021-06-12 15:31:26,131 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-12 15:31:26,132 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 15:31:26,132 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 15:31:26,132 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 15:31:26,132 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 15:31:26,132 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 15:31:26,132 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 15:31:26,132 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 15:31:26,132 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 15:31:26,134 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 71 places, 91 transitions, 187 flow [2021-06-12 15:31:26,142 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 637 states, 633 states have (on average 2.8720379146919433) internal successors, (1818), 636 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:26,143 INFO L276 IsEmpty]: Start isEmpty. Operand has 637 states, 633 states have (on average 2.8720379146919433) internal successors, (1818), 636 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:26,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 15:31:26,144 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:26,144 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:26,144 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:26,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:26,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1049865858, now seen corresponding path program 1 times [2021-06-12 15:31:26,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:26,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017114302] [2021-06-12 15:31:26,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:26,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:26,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:26,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017114302] [2021-06-12 15:31:26,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017114302] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:31:26,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:31:26,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 15:31:26,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56412006] [2021-06-12 15:31:26,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-06-12 15:31:26,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:26,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-06-12 15:31:26,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-06-12 15:31:26,173 INFO L87 Difference]: Start difference. First operand has 637 states, 633 states have (on average 2.8720379146919433) internal successors, (1818), 636 states have internal predecessors, (1818), 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 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:26,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:26,176 INFO L93 Difference]: Finished difference Result 353 states and 874 transitions. [2021-06-12 15:31:26,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-12 15:31:26,176 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 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 [2021-06-12 15:31:26,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:26,177 INFO L225 Difference]: With dead ends: 353 [2021-06-12 15:31:26,178 INFO L226 Difference]: Without dead ends: 353 [2021-06-12 15:31:26,178 INFO L728 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 [2021-06-12 15:31:26,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-12 15:31:26,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2021-06-12 15:31:26,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.4829545454545454) internal successors, (874), 352 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:26,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 874 transitions. [2021-06-12 15:31:26,185 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 874 transitions. Word has length 33 [2021-06-12 15:31:26,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:26,185 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 874 transitions. [2021-06-12 15:31:26,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:26,185 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 874 transitions. [2021-06-12 15:31:26,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 15:31:26,186 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:26,186 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:26,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-12 15:31:26,186 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:26,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:26,187 INFO L82 PathProgramCache]: Analyzing trace with hash 692974268, now seen corresponding path program 1 times [2021-06-12 15:31:26,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:26,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927318384] [2021-06-12 15:31:26,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:26,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:26,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:26,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:26,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927318384] [2021-06-12 15:31:26,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927318384] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:31:26,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:31:26,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 15:31:26,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023024801] [2021-06-12 15:31:26,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 15:31:26,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:26,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 15:31:26,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 15:31:26,206 INFO L87 Difference]: Start difference. First operand 353 states and 874 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) [2021-06-12 15:31:26,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:26,221 INFO L93 Difference]: Finished difference Result 556 states and 1411 transitions. [2021-06-12 15:31:26,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 15:31:26,222 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 [2021-06-12 15:31:26,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:26,224 INFO L225 Difference]: With dead ends: 556 [2021-06-12 15:31:26,224 INFO L226 Difference]: Without dead ends: 481 [2021-06-12 15:31:26,224 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 15:31:26,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-12 15:31:26,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 327. [2021-06-12 15:31:26,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.496932515337423) internal successors, (814), 326 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:26,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 814 transitions. [2021-06-12 15:31:26,231 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 814 transitions. Word has length 33 [2021-06-12 15:31:26,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:26,231 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 814 transitions. [2021-06-12 15:31:26,231 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) [2021-06-12 15:31:26,232 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 814 transitions. [2021-06-12 15:31:26,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-12 15:31:26,232 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:26,234 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:26,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-12 15:31:26,235 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:26,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:26,236 INFO L82 PathProgramCache]: Analyzing trace with hash -902160539, now seen corresponding path program 1 times [2021-06-12 15:31:26,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:26,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805456303] [2021-06-12 15:31:26,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:26,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:26,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:26,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805456303] [2021-06-12 15:31:26,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805456303] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:31:26,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:31:26,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 15:31:26,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592258814] [2021-06-12 15:31:26,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 15:31:26,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:26,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 15:31:26,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 15:31:26,268 INFO L87 Difference]: Start difference. First operand 327 states and 814 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:26,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:26,290 INFO L93 Difference]: Finished difference Result 349 states and 855 transitions. [2021-06-12 15:31:26,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 15:31:26,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-12 15:31:26,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:26,292 INFO L225 Difference]: With dead ends: 349 [2021-06-12 15:31:26,292 INFO L226 Difference]: Without dead ends: 349 [2021-06-12 15:31:26,292 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 15:31:26,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-12 15:31:26,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2021-06-12 15:31:26,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.456896551724138) internal successors, (855), 348 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:26,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 855 transitions. [2021-06-12 15:31:26,299 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 855 transitions. Word has length 42 [2021-06-12 15:31:26,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:26,299 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 855 transitions. [2021-06-12 15:31:26,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:26,299 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 855 transitions. [2021-06-12 15:31:26,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-12 15:31:26,300 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:26,300 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:26,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-12 15:31:26,300 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:26,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:26,300 INFO L82 PathProgramCache]: Analyzing trace with hash 2052749259, now seen corresponding path program 2 times [2021-06-12 15:31:26,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:26,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040265428] [2021-06-12 15:31:26,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:26,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:26,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:26,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:26,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040265428] [2021-06-12 15:31:26,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040265428] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:31:26,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:31:26,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 15:31:26,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636451434] [2021-06-12 15:31:26,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 15:31:26,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:26,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 15:31:26,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 15:31:26,331 INFO L87 Difference]: Start difference. First operand 349 states and 855 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:26,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:26,365 INFO L93 Difference]: Finished difference Result 367 states and 869 transitions. [2021-06-12 15:31:26,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 15:31:26,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-12 15:31:26,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:26,367 INFO L225 Difference]: With dead ends: 367 [2021-06-12 15:31:26,367 INFO L226 Difference]: Without dead ends: 367 [2021-06-12 15:31:26,368 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 15:31:26,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-12 15:31:26,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 363. [2021-06-12 15:31:26,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 2.3784530386740332) internal successors, (861), 362 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:26,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 861 transitions. [2021-06-12 15:31:26,376 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 861 transitions. Word has length 42 [2021-06-12 15:31:26,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:26,378 INFO L482 AbstractCegarLoop]: Abstraction has 363 states and 861 transitions. [2021-06-12 15:31:26,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:26,378 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 861 transitions. [2021-06-12 15:31:26,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-12 15:31:26,379 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:31:26,380 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:31:26,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-12 15:31:26,380 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:31:26,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:31:26,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1356013637, now seen corresponding path program 3 times [2021-06-12 15:31:26,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:31:26,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617500984] [2021-06-12 15:31:26,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:31:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:31:26,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:31:26,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:31:26,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617500984] [2021-06-12 15:31:26,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617500984] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:31:26,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:31:26,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 15:31:26,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259909608] [2021-06-12 15:31:26,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 15:31:26,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:31:26,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 15:31:26,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 15:31:26,422 INFO L87 Difference]: Start difference. First operand 363 states and 861 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:26,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:31:26,447 INFO L93 Difference]: Finished difference Result 324 states and 743 transitions. [2021-06-12 15:31:26,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 15:31:26,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-12 15:31:26,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:31:26,447 INFO L225 Difference]: With dead ends: 324 [2021-06-12 15:31:26,447 INFO L226 Difference]: Without dead ends: 0 [2021-06-12 15:31:26,448 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 15:31:26,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-12 15:31:26,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-12 15:31:26,448 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) [2021-06-12 15:31:26,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-12 15:31:26,449 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 42 [2021-06-12 15:31:26,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:31:26,449 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-12 15:31:26,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:31:26,449 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-12 15:31:26,449 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-12 15:31:26,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-12 15:31:26,449 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (3/3) [2021-06-12 15:31:26,450 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 15:31:26,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 03:31:26 BasicIcfg [2021-06-12 15:31:26,452 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 15:31:26,454 INFO L168 Benchmark]: Toolchain (without parser) took 1973.66 ms. Allocated memory was 168.8 MB in the beginning and 203.4 MB in the end (delta: 34.6 MB). Free memory was 132.1 MB in the beginning and 160.9 MB in the end (delta: -28.8 MB). Peak memory consumption was 6.0 MB. Max. memory is 8.0 GB. [2021-06-12 15:31:26,455 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 168.8 MB. Free memory is still 150.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 15:31:26,455 INFO L168 Benchmark]: CACSL2BoogieTranslator took 387.15 ms. Allocated memory is still 168.8 MB. Free memory was 131.9 MB in the beginning and 133.4 MB in the end (delta: -1.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-06-12 15:31:26,455 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.57 ms. Allocated memory is still 168.8 MB. Free memory was 133.4 MB in the beginning and 131.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-12 15:31:26,457 INFO L168 Benchmark]: Boogie Preprocessor took 16.18 ms. Allocated memory is still 168.8 MB. Free memory was 131.7 MB in the beginning and 130.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 15:31:26,457 INFO L168 Benchmark]: RCFGBuilder took 364.87 ms. Allocated memory is still 168.8 MB. Free memory was 130.2 MB in the beginning and 107.2 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2021-06-12 15:31:26,457 INFO L168 Benchmark]: TraceAbstraction took 1160.79 ms. Allocated memory was 168.8 MB in the beginning and 203.4 MB in the end (delta: 34.6 MB). Free memory was 106.7 MB in the beginning and 160.9 MB in the end (delta: -54.3 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 15:31:26,460 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 168.8 MB. Free memory is still 150.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 387.15 ms. Allocated memory is still 168.8 MB. Free memory was 131.9 MB in the beginning and 133.4 MB in the end (delta: -1.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 40.57 ms. Allocated memory is still 168.8 MB. Free memory was 133.4 MB in the beginning and 131.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.18 ms. Allocated memory is still 168.8 MB. Free memory was 131.7 MB in the beginning and 130.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 364.87 ms. Allocated memory is still 168.8 MB. Free memory was 130.2 MB in the beginning and 107.2 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1160.79 ms. Allocated memory was 168.8 MB in the beginning and 203.4 MB in the end (delta: 34.6 MB). Free memory was 106.7 MB in the beginning and 160.9 MB in the end (delta: -54.3 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 698]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 716]: 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: thr1 with 1 thread instances CFG has 3 procedures, 89 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 73.7ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 27.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 43.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=637occurred 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: thr1Thread1of1ForFork0 with 1 thread instances CFG has 3 procedures, 89 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 678.7ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 6.3ms, AutomataDifference: 200.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 393 SDtfs, 137 SDslu, 164 SDs, 0 SdLazy, 71 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 87.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=637occurred in iteration=0, InterpolantAutomatonStates: 14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 76.6ms AutomataMinimizationTime, 5 MinimizatonAttempts, 156 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 14.5ms SsaConstructionTime, 59.4ms SatisfiabilityAnalysisTime, 189.5ms InterpolantComputationTime, 182 NumberOfCodeBlocks, 182 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 177 ConstructedInterpolants, 0 QuantifiedInterpolants, 213 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 3 procedures, 89 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 317.2ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 5.3ms, AutomataDifference: 113.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 422 SDtfs, 123 SDslu, 179 SDs, 0 SdLazy, 73 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 59.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=637occurred in iteration=0, InterpolantAutomatonStates: 14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 29.6ms AutomataMinimizationTime, 5 MinimizatonAttempts, 158 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 10.3ms SsaConstructionTime, 26.0ms SatisfiabilityAnalysisTime, 84.4ms InterpolantComputationTime, 192 NumberOfCodeBlocks, 192 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 187 ConstructedInterpolants, 0 QuantifiedInterpolants, 225 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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...