/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-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/17_szymanski.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-14 00:00:58,996 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-14 00:00:58,998 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-14 00:00:59,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-14 00:00:59,072 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-14 00:00:59,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-14 00:00:59,074 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-14 00:00:59,074 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-14 00:00:59,075 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-14 00:00:59,076 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-14 00:00:59,077 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-14 00:00:59,079 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-14 00:00:59,080 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-14 00:00:59,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-14 00:00:59,090 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-14 00:00:59,093 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-14 00:00:59,097 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-07-14 00:00:59,104 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-14 00:00:59,109 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-14 00:00:59,110 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-14 00:00:59,118 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-Delay.epf [2021-07-14 00:00:59,138 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-14 00:00:59,138 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-14 00:00:59,140 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-14 00:00:59,140 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-14 00:00:59,140 INFO L138 SettingsManager]: * Use SBE=true [2021-07-14 00:00:59,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-14 00:00:59,140 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-14 00:00:59,140 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-14 00:00:59,141 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-14 00:00:59,141 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-14 00:00:59,141 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-14 00:00:59,141 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-14 00:00:59,141 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-14 00:00:59,141 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-14 00:00:59,141 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-14 00:00:59,141 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-14 00:00:59,142 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-14 00:00:59,142 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-14 00:00:59,142 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-14 00:00:59,142 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-14 00:00:59,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-14 00:00:59,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-14 00:00:59,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-14 00:00:59,143 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-14 00:00:59,143 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-14 00:00:59,143 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-14 00:00:59,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-14 00:00:59,143 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-14 00:00:59,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-14 00:00:59,144 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-07-14 00:00:59,144 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-14 00:00:59,414 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-14 00:00:59,430 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-14 00:00:59,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-14 00:00:59,434 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-14 00:00:59,434 INFO L275 PluginConnector]: CDTParser initialized [2021-07-14 00:00:59,435 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/17_szymanski.i [2021-07-14 00:00:59,492 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cefa78544/c3a6b7e130334f27b75855720c5af252/FLAGb8d8e7498 [2021-07-14 00:01:00,022 INFO L306 CDTParser]: Found 1 translation units. [2021-07-14 00:01:00,023 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/17_szymanski.i [2021-07-14 00:01:00,042 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cefa78544/c3a6b7e130334f27b75855720c5af252/FLAGb8d8e7498 [2021-07-14 00:01:00,468 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cefa78544/c3a6b7e130334f27b75855720c5af252 [2021-07-14 00:01:00,485 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-14 00:01:00,488 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-07-14 00:01:00,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-14 00:01:00,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-14 00:01:00,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-14 00:01:00,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 12:01:00" (1/1) ... [2021-07-14 00:01:00,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@132eb97c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 12:01:00, skipping insertion in model container [2021-07-14 00:01:00,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 12:01:00" (1/1) ... [2021-07-14 00:01:00,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-14 00:01:00,554 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-14 00:01:00,869 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] [2021-07-14 00:01:00,877 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] [2021-07-14 00:01:00,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-14 00:01:00,887 INFO L203 MainTranslator]: Completed pre-run [2021-07-14 00:01:00,923 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] [2021-07-14 00:01:00,925 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] [2021-07-14 00:01:00,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-14 00:01:00,963 INFO L208 MainTranslator]: Completed translation [2021-07-14 00:01:00,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 12:01:00 WrapperNode [2021-07-14 00:01:00,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-14 00:01:00,964 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-14 00:01:00,964 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-14 00:01:00,964 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-14 00:01:00,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 12:01:00" (1/1) ... [2021-07-14 00:01:01,000 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 12:01:00" (1/1) ... [2021-07-14 00:01:01,015 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-14 00:01:01,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-14 00:01:01,016 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-14 00:01:01,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-14 00:01:01,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 12:01:00" (1/1) ... [2021-07-14 00:01:01,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 12:01:00" (1/1) ... [2021-07-14 00:01:01,028 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 12:01:00" (1/1) ... [2021-07-14 00:01:01,028 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 12:01:00" (1/1) ... [2021-07-14 00:01:01,038 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 12:01:00" (1/1) ... [2021-07-14 00:01:01,042 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 12:01:00" (1/1) ... [2021-07-14 00:01:01,044 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 12:01:00" (1/1) ... [2021-07-14 00:01:01,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-14 00:01:01,054 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-14 00:01:01,055 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-14 00:01:01,055 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-14 00:01:01,055 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 12:01:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-14 00:01:01,127 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2021-07-14 00:01:01,127 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2021-07-14 00:01:01,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-14 00:01:01,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-14 00:01:01,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-14 00:01:01,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-14 00:01:01,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-14 00:01:01,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-14 00:01:01,129 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-14 00:01:01,371 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-14 00:01:01,371 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2021-07-14 00:01:01,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 12:01:01 BoogieIcfgContainer [2021-07-14 00:01:01,373 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-14 00:01:01,374 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-14 00:01:01,374 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-14 00:01:01,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-14 00:01:01,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 12:01:00" (1/3) ... [2021-07-14 00:01:01,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@255e3e68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 12:01:01, skipping insertion in model container [2021-07-14 00:01:01,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 12:01:00" (2/3) ... [2021-07-14 00:01:01,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@255e3e68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 12:01:01, skipping insertion in model container [2021-07-14 00:01:01,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 12:01:01" (3/3) ... [2021-07-14 00:01:01,379 INFO L111 eAbstractionObserver]: Analyzing ICFG 17_szymanski.i [2021-07-14 00:01:01,383 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-14 00:01:01,383 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-14 00:01:01,383 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-07-14 00:01:01,384 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-14 00:01:01,405 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-14 00:01:01,406 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-14 00:01:01,406 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-14 00:01:01,406 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-14 00:01:01,406 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-14 00:01:01,407 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-14 00:01:01,407 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-14 00:01:01,407 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-14 00:01:01,407 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-14 00:01:01,407 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-14 00:01:01,408 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-14 00:01:01,408 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-14 00:01:01,412 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-14 00:01:01,412 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-14 00:01:01,413 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-14 00:01:01,413 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-14 00:01:01,416 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-07-14 00:01:01,450 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-14 00:01:01,464 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-14 00:01:01,465 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-14 00:01:01,465 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-14 00:01:01,465 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-14 00:01:01,465 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-14 00:01:01,465 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-14 00:01:01,465 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-14 00:01:01,466 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thr1Thread1of1ForFork0======== [2021-07-14 00:01:01,841 INFO L276 IsEmpty]: Start isEmpty. Operand has 544 states, 510 states have (on average 2.0980392156862746) internal successors, (1070), 543 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-14 00:01:01,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-14 00:01:01,847 INFO L500 BasicCegarLoop]: Found error trace [2021-07-14 00:01:01,848 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-14 00:01:01,848 INFO L430 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-14 00:01:01,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-14 00:01:01,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1300194564, now seen corresponding path program 1 times [2021-07-14 00:01:01,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-14 00:01:01,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703680960] [2021-07-14 00:01:01,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-14 00:01:01,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 00:01:01,990 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 00:01:01,991 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-14 00:01:01,992 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 00:01:01,992 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-14 00:01:01,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 00:01:01,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-14 00:01:01,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703680960] [2021-07-14 00:01:01,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703680960] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-14 00:01:01,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-14 00:01:01,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-14 00:01:01,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946516132] [2021-07-14 00:01:01,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-07-14 00:01:01,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-14 00:01:02,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-07-14 00:01:02,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-14 00:01:02,016 INFO L87 Difference]: Start difference. First operand has 544 states, 510 states have (on average 2.0980392156862746) internal successors, (1070), 543 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-14 00:01:02,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-14 00:01:02,041 INFO L93 Difference]: Finished difference Result 353 states and 694 transitions. [2021-07-14 00:01:02,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-14 00:01:02,042 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-14 00:01:02,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-14 00:01:02,053 INFO L225 Difference]: With dead ends: 353 [2021-07-14 00:01:02,053 INFO L226 Difference]: Without dead ends: 305 [2021-07-14 00:01:02,054 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-14 00:01:02,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-07-14 00:01:02,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2021-07-14 00:01:02,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.1052631578947367) internal successors, (640), 304 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-14 00:01:02,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 640 transitions. [2021-07-14 00:01:02,106 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 640 transitions. Word has length 28 [2021-07-14 00:01:02,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-14 00:01:02,108 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 640 transitions. [2021-07-14 00:01:02,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-14 00:01:02,108 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 640 transitions. [2021-07-14 00:01:02,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-14 00:01:02,109 INFO L500 BasicCegarLoop]: Found error trace [2021-07-14 00:01:02,110 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-14 00:01:02,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-14 00:01:02,110 INFO L430 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-14 00:01:02,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-14 00:01:02,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1251932606, now seen corresponding path program 1 times [2021-07-14 00:01:02,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-14 00:01:02,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142670568] [2021-07-14 00:01:02,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-14 00:01:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 00:01:02,198 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 00:01:02,199 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-14 00:01:02,200 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 00:01:02,200 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-14 00:01:02,208 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 00:01:02,208 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-14 00:01:02,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 00:01:02,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-14 00:01:02,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142670568] [2021-07-14 00:01:02,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142670568] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-14 00:01:02,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-14 00:01:02,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-14 00:01:02,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73201832] [2021-07-14 00:01:02,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-14 00:01:02,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-14 00:01:02,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-14 00:01:02,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-14 00:01:02,213 INFO L87 Difference]: Start difference. First operand 305 states and 640 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-14 00:01:02,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-14 00:01:02,241 INFO L93 Difference]: Finished difference Result 462 states and 1063 transitions. [2021-07-14 00:01:02,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-14 00:01:02,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-14 00:01:02,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-14 00:01:02,250 INFO L225 Difference]: With dead ends: 462 [2021-07-14 00:01:02,250 INFO L226 Difference]: Without dead ends: 449 [2021-07-14 00:01:02,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-14 00:01:02,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-07-14 00:01:02,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 305. [2021-07-14 00:01:02,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.148026315789474) internal successors, (653), 304 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-14 00:01:02,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 653 transitions. [2021-07-14 00:01:02,282 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 653 transitions. Word has length 28 [2021-07-14 00:01:02,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-14 00:01:02,282 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 653 transitions. [2021-07-14 00:01:02,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-14 00:01:02,283 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 653 transitions. [2021-07-14 00:01:02,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-14 00:01:02,285 INFO L500 BasicCegarLoop]: Found error trace [2021-07-14 00:01:02,285 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-14 00:01:02,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-14 00:01:02,286 INFO L430 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-14 00:01:02,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-14 00:01:02,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1276466855, now seen corresponding path program 1 times [2021-07-14 00:01:02,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-14 00:01:02,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182822476] [2021-07-14 00:01:02,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-14 00:01:02,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 00:01:02,380 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 00:01:02,381 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-14 00:01:02,382 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 00:01:02,383 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-14 00:01:02,386 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 00:01:02,386 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-14 00:01:02,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 00:01:02,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-14 00:01:02,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182822476] [2021-07-14 00:01:02,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182822476] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-14 00:01:02,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-14 00:01:02,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-14 00:01:02,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533689357] [2021-07-14 00:01:02,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-14 00:01:02,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-14 00:01:02,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-14 00:01:02,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-14 00:01:02,394 INFO L87 Difference]: Start difference. First operand 305 states and 653 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) [2021-07-14 00:01:02,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-14 00:01:02,447 INFO L93 Difference]: Finished difference Result 327 states and 692 transitions. [2021-07-14 00:01:02,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-14 00:01:02,449 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 [2021-07-14 00:01:02,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-14 00:01:02,451 INFO L225 Difference]: With dead ends: 327 [2021-07-14 00:01:02,452 INFO L226 Difference]: Without dead ends: 327 [2021-07-14 00:01:02,452 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-14 00:01:02,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-07-14 00:01:02,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2021-07-14 00:01:02,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.1226993865030677) internal successors, (692), 326 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-14 00:01:02,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 692 transitions. [2021-07-14 00:01:02,475 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 692 transitions. Word has length 42 [2021-07-14 00:01:02,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-14 00:01:02,476 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 692 transitions. [2021-07-14 00:01:02,476 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) [2021-07-14 00:01:02,476 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 692 transitions. [2021-07-14 00:01:02,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-14 00:01:02,487 INFO L500 BasicCegarLoop]: Found error trace [2021-07-14 00:01:02,487 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-14 00:01:02,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-14 00:01:02,487 INFO L430 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-14 00:01:02,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-14 00:01:02,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1007476549, now seen corresponding path program 2 times [2021-07-14 00:01:02,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-14 00:01:02,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320482422] [2021-07-14 00:01:02,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-14 00:01:02,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 00:01:02,526 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 00:01:02,527 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-14 00:01:02,528 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 00:01:02,528 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-14 00:01:02,531 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 00:01:02,532 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-14 00:01:02,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 00:01:02,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-14 00:01:02,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320482422] [2021-07-14 00:01:02,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320482422] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-14 00:01:02,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-14 00:01:02,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-14 00:01:02,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837544500] [2021-07-14 00:01:02,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-14 00:01:02,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-14 00:01:02,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-14 00:01:02,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-14 00:01:02,535 INFO L87 Difference]: Start difference. First operand 327 states and 692 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) [2021-07-14 00:01:02,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-14 00:01:02,569 INFO L93 Difference]: Finished difference Result 320 states and 641 transitions. [2021-07-14 00:01:02,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-14 00:01:02,569 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 [2021-07-14 00:01:02,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-14 00:01:02,571 INFO L225 Difference]: With dead ends: 320 [2021-07-14 00:01:02,572 INFO L226 Difference]: Without dead ends: 320 [2021-07-14 00:01:02,572 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-14 00:01:02,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-07-14 00:01:02,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 318. [2021-07-14 00:01:02,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.006309148264984) internal successors, (636), 317 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-14 00:01:02,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 636 transitions. [2021-07-14 00:01:02,583 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 636 transitions. Word has length 42 [2021-07-14 00:01:02,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-14 00:01:02,583 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 636 transitions. [2021-07-14 00:01:02,583 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) [2021-07-14 00:01:02,584 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 636 transitions. [2021-07-14 00:01:02,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-14 00:01:02,585 INFO L500 BasicCegarLoop]: Found error trace [2021-07-14 00:01:02,585 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-14 00:01:02,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-14 00:01:02,585 INFO L430 AbstractCegarLoop]: === Iteration 5 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-14 00:01:02,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-14 00:01:02,586 INFO L82 PathProgramCache]: Analyzing trace with hash -282369101, now seen corresponding path program 3 times [2021-07-14 00:01:02,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-14 00:01:02,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154210372] [2021-07-14 00:01:02,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-14 00:01:02,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 00:01:02,627 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 00:01:02,628 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-14 00:01:02,628 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 00:01:02,629 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-14 00:01:02,636 INFO L142 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size [2021-07-14 00:01:02,636 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-14 00:01:02,637 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 00:01:02,637 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-14 00:01:02,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 00:01:02,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-14 00:01:02,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154210372] [2021-07-14 00:01:02,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154210372] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-14 00:01:02,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-14 00:01:02,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-14 00:01:02,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526881962] [2021-07-14 00:01:02,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-14 00:01:02,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-14 00:01:02,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-14 00:01:02,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-14 00:01:02,640 INFO L87 Difference]: Start difference. First operand 318 states and 636 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) [2021-07-14 00:01:02,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-14 00:01:02,669 INFO L93 Difference]: Finished difference Result 305 states and 579 transitions. [2021-07-14 00:01:02,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-14 00:01:02,669 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 [2021-07-14 00:01:02,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-14 00:01:02,670 INFO L225 Difference]: With dead ends: 305 [2021-07-14 00:01:02,670 INFO L226 Difference]: Without dead ends: 0 [2021-07-14 00:01:02,670 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-14 00:01:02,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-14 00:01:02,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-14 00:01:02,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-14 00:01:02,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-14 00:01:02,671 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 42 [2021-07-14 00:01:02,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-14 00:01:02,671 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-14 00:01:02,671 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) [2021-07-14 00:01:02,671 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-14 00:01:02,671 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-14 00:01:02,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-14 00:01:02,672 INFO L301 ceAbstractionStarter]: Result for error location thr1Thread1of1ForFork0 was SAFE (1/2) [2021-07-14 00:01:02,673 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-07-14 00:01:02,674 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-14 00:01:02,674 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-14 00:01:02,674 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-14 00:01:02,674 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-14 00:01:02,674 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-14 00:01:02,674 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-14 00:01:02,675 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-14 00:01:02,675 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-14 00:01:02,821 INFO L276 IsEmpty]: Start isEmpty. Operand has 457 states, 413 states have (on average 2.5254237288135593) internal successors, (1043), 456 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-14 00:01:02,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-14 00:01:02,822 INFO L500 BasicCegarLoop]: Found error trace [2021-07-14 00:01:02,823 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-14 00:01:02,823 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-14 00:01:02,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-14 00:01:02,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1049865858, now seen corresponding path program 1 times [2021-07-14 00:01:02,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-14 00:01:02,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77344090] [2021-07-14 00:01:02,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-14 00:01:02,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 00:01:02,856 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 00:01:02,858 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-14 00:01:02,858 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 00:01:02,859 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-14 00:01:02,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 00:01:02,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-14 00:01:02,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77344090] [2021-07-14 00:01:02,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77344090] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-14 00:01:02,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-14 00:01:02,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-14 00:01:02,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471477906] [2021-07-14 00:01:02,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-07-14 00:01:02,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-14 00:01:02,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-07-14 00:01:02,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-14 00:01:02,864 INFO L87 Difference]: Start difference. First operand has 457 states, 413 states have (on average 2.5254237288135593) internal successors, (1043), 456 states have internal predecessors, (1043), 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) [2021-07-14 00:01:02,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-14 00:01:02,870 INFO L93 Difference]: Finished difference Result 353 states and 724 transitions. [2021-07-14 00:01:02,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-14 00:01:02,870 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 [2021-07-14 00:01:02,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-14 00:01:02,871 INFO L225 Difference]: With dead ends: 353 [2021-07-14 00:01:02,871 INFO L226 Difference]: Without dead ends: 235 [2021-07-14 00:01:02,872 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-14 00:01:02,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-07-14 00:01:02,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2021-07-14 00:01:02,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.4358974358974357) internal successors, (570), 234 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-14 00:01:02,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 570 transitions. [2021-07-14 00:01:02,879 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 570 transitions. Word has length 33 [2021-07-14 00:01:02,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-14 00:01:02,880 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 570 transitions. [2021-07-14 00:01:02,880 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) [2021-07-14 00:01:02,880 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 570 transitions. [2021-07-14 00:01:02,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-14 00:01:02,880 INFO L500 BasicCegarLoop]: Found error trace [2021-07-14 00:01:02,880 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-14 00:01:02,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-14 00:01:02,881 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-14 00:01:02,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-14 00:01:02,882 INFO L82 PathProgramCache]: Analyzing trace with hash 692974268, now seen corresponding path program 1 times [2021-07-14 00:01:02,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-14 00:01:02,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648333081] [2021-07-14 00:01:02,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-14 00:01:02,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 00:01:02,931 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 00:01:02,932 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-14 00:01:02,933 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 00:01:02,933 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-14 00:01:02,936 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 00:01:02,936 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-14 00:01:02,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 00:01:02,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-14 00:01:02,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648333081] [2021-07-14 00:01:02,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648333081] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-14 00:01:02,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-14 00:01:02,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-14 00:01:02,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297112808] [2021-07-14 00:01:02,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-14 00:01:02,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-14 00:01:02,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-14 00:01:02,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-14 00:01:02,939 INFO L87 Difference]: Start difference. First operand 235 states and 570 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) [2021-07-14 00:01:02,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-14 00:01:02,955 INFO L93 Difference]: Finished difference Result 412 states and 1027 transitions. [2021-07-14 00:01:02,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-14 00:01:02,955 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 [2021-07-14 00:01:02,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-14 00:01:02,958 INFO L225 Difference]: With dead ends: 412 [2021-07-14 00:01:02,958 INFO L226 Difference]: Without dead ends: 399 [2021-07-14 00:01:02,958 INFO L764 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 [2021-07-14 00:01:02,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-07-14 00:01:02,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 245. [2021-07-14 00:01:02,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.430327868852459) internal successors, (593), 244 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-14 00:01:02,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 593 transitions. [2021-07-14 00:01:02,968 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 593 transitions. Word has length 33 [2021-07-14 00:01:02,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-14 00:01:02,968 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 593 transitions. [2021-07-14 00:01:02,969 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) [2021-07-14 00:01:02,969 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 593 transitions. [2021-07-14 00:01:02,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-14 00:01:02,973 INFO L500 BasicCegarLoop]: Found error trace [2021-07-14 00:01:02,974 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-14 00:01:02,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-14 00:01:02,974 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-14 00:01:02,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-14 00:01:02,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1403637437, now seen corresponding path program 1 times [2021-07-14 00:01:02,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-14 00:01:02,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518377811] [2021-07-14 00:01:02,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-14 00:01:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 00:01:03,007 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 00:01:03,008 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-14 00:01:03,009 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 00:01:03,010 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-14 00:01:03,012 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 00:01:03,013 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-14 00:01:03,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 00:01:03,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-14 00:01:03,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518377811] [2021-07-14 00:01:03,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518377811] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-14 00:01:03,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-14 00:01:03,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-14 00:01:03,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220264648] [2021-07-14 00:01:03,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-14 00:01:03,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-14 00:01:03,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-14 00:01:03,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-14 00:01:03,015 INFO L87 Difference]: Start difference. First operand 245 states and 593 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) [2021-07-14 00:01:03,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-14 00:01:03,047 INFO L93 Difference]: Finished difference Result 279 states and 645 transitions. [2021-07-14 00:01:03,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-14 00:01:03,048 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 [2021-07-14 00:01:03,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-14 00:01:03,049 INFO L225 Difference]: With dead ends: 279 [2021-07-14 00:01:03,049 INFO L226 Difference]: Without dead ends: 279 [2021-07-14 00:01:03,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-14 00:01:03,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-07-14 00:01:03,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 272. [2021-07-14 00:01:03,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.339483394833948) internal successors, (634), 271 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-14 00:01:03,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 634 transitions. [2021-07-14 00:01:03,058 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 634 transitions. Word has length 42 [2021-07-14 00:01:03,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-14 00:01:03,058 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 634 transitions. [2021-07-14 00:01:03,059 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) [2021-07-14 00:01:03,059 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 634 transitions. [2021-07-14 00:01:03,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-14 00:01:03,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-14 00:01:03,060 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-14 00:01:03,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-14 00:01:03,060 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-14 00:01:03,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-14 00:01:03,060 INFO L82 PathProgramCache]: Analyzing trace with hash -248676291, now seen corresponding path program 2 times [2021-07-14 00:01:03,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-14 00:01:03,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288383333] [2021-07-14 00:01:03,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-14 00:01:03,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 00:01:03,087 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 00:01:03,087 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-14 00:01:03,088 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 00:01:03,089 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-14 00:01:03,091 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 00:01:03,092 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-14 00:01:03,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 00:01:03,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-14 00:01:03,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288383333] [2021-07-14 00:01:03,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288383333] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-14 00:01:03,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-14 00:01:03,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-14 00:01:03,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080529317] [2021-07-14 00:01:03,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-14 00:01:03,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-14 00:01:03,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-14 00:01:03,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-14 00:01:03,096 INFO L87 Difference]: Start difference. First operand 272 states and 634 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) [2021-07-14 00:01:03,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-14 00:01:03,125 INFO L93 Difference]: Finished difference Result 272 states and 620 transitions. [2021-07-14 00:01:03,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-14 00:01:03,126 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 [2021-07-14 00:01:03,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-14 00:01:03,129 INFO L225 Difference]: With dead ends: 272 [2021-07-14 00:01:03,129 INFO L226 Difference]: Without dead ends: 272 [2021-07-14 00:01:03,131 INFO L764 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 [2021-07-14 00:01:03,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-07-14 00:01:03,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 270. [2021-07-14 00:01:03,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.2973977695167287) internal successors, (618), 269 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-14 00:01:03,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 618 transitions. [2021-07-14 00:01:03,139 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 618 transitions. Word has length 42 [2021-07-14 00:01:03,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-14 00:01:03,139 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 618 transitions. [2021-07-14 00:01:03,140 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) [2021-07-14 00:01:03,140 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 618 transitions. [2021-07-14 00:01:03,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-14 00:01:03,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-14 00:01:03,140 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-14 00:01:03,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-14 00:01:03,141 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-14 00:01:03,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-14 00:01:03,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1133697535, now seen corresponding path program 3 times [2021-07-14 00:01:03,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-14 00:01:03,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970906923] [2021-07-14 00:01:03,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-14 00:01:03,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 00:01:03,170 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 00:01:03,170 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-14 00:01:03,171 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 00:01:03,171 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-14 00:01:03,180 INFO L142 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size [2021-07-14 00:01:03,180 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-14 00:01:03,180 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 00:01:03,181 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-14 00:01:03,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 00:01:03,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-14 00:01:03,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970906923] [2021-07-14 00:01:03,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970906923] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-14 00:01:03,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-14 00:01:03,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-14 00:01:03,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170678591] [2021-07-14 00:01:03,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-14 00:01:03,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-14 00:01:03,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-14 00:01:03,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-14 00:01:03,183 INFO L87 Difference]: Start difference. First operand 270 states and 618 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) [2021-07-14 00:01:03,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-14 00:01:03,208 INFO L93 Difference]: Finished difference Result 229 states and 499 transitions. [2021-07-14 00:01:03,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-14 00:01:03,209 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 [2021-07-14 00:01:03,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-14 00:01:03,211 INFO L225 Difference]: With dead ends: 229 [2021-07-14 00:01:03,211 INFO L226 Difference]: Without dead ends: 0 [2021-07-14 00:01:03,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-14 00:01:03,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-14 00:01:03,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-14 00:01:03,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-14 00:01:03,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-14 00:01:03,214 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 42 [2021-07-14 00:01:03,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-14 00:01:03,215 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-14 00:01:03,215 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) [2021-07-14 00:01:03,215 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-14 00:01:03,215 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-14 00:01:03,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-14 00:01:03,215 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (2/2) [2021-07-14 00:01:03,215 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-14 00:01:03,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.07 12:01:03 BasicIcfg [2021-07-14 00:01:03,218 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-14 00:01:03,221 INFO L168 Benchmark]: Toolchain (without parser) took 2731.37 ms. Allocated memory was 265.3 MB in the beginning and 330.3 MB in the end (delta: 65.0 MB). Free memory was 227.5 MB in the beginning and 226.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 66.2 MB. Max. memory is 8.0 GB. [2021-07-14 00:01:03,221 INFO L168 Benchmark]: CDTParser took 0.45 ms. Allocated memory is still 265.3 MB. Free memory is still 245.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-14 00:01:03,222 INFO L168 Benchmark]: CACSL2BoogieTranslator took 473.89 ms. Allocated memory is still 265.3 MB. Free memory was 227.4 MB in the beginning and 239.5 MB in the end (delta: -12.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-07-14 00:01:03,222 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.09 ms. Allocated memory is still 265.3 MB. Free memory was 239.5 MB in the beginning and 237.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-14 00:01:03,222 INFO L168 Benchmark]: Boogie Preprocessor took 37.86 ms. Allocated memory is still 265.3 MB. Free memory was 237.5 MB in the beginning and 236.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-14 00:01:03,222 INFO L168 Benchmark]: RCFGBuilder took 318.27 ms. Allocated memory is still 265.3 MB. Free memory was 236.4 MB in the beginning and 212.9 MB in the end (delta: 23.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2021-07-14 00:01:03,223 INFO L168 Benchmark]: TraceAbstraction took 1844.35 ms. Allocated memory was 265.3 MB in the beginning and 330.3 MB in the end (delta: 65.0 MB). Free memory was 212.3 MB in the beginning and 226.4 MB in the end (delta: -14.1 MB). Peak memory consumption was 52.0 MB. Max. memory is 8.0 GB. [2021-07-14 00:01:03,227 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45 ms. Allocated memory is still 265.3 MB. Free memory is still 245.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 473.89 ms. Allocated memory is still 265.3 MB. Free memory was 227.4 MB in the beginning and 239.5 MB in the end (delta: -12.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 51.09 ms. Allocated memory is still 265.3 MB. Free memory was 239.5 MB in the beginning and 237.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.86 ms. Allocated memory is still 265.3 MB. Free memory was 237.5 MB in the beginning and 236.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 318.27 ms. Allocated memory is still 265.3 MB. Free memory was 236.4 MB in the beginning and 212.9 MB in the end (delta: 23.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1844.35 ms. Allocated memory was 265.3 MB in the beginning and 330.3 MB in the end (delta: 65.0 MB). Free memory was 212.3 MB in the beginning and 226.4 MB in the end (delta: -14.1 MB). Peak memory consumption was 52.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 1635, positive: 1081, positive conditional: 1081, positive unconditional: 0, negative: 554, negative conditional: 554, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 1134, positive: 1081, positive conditional: 0, positive unconditional: 1081, negative: 53, negative conditional: 0, negative unconditional: 53, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1134, positive: 1081, positive conditional: 0, positive unconditional: 1081, negative: 53, negative conditional: 0, negative unconditional: 53, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1134, positive: 1029, positive conditional: 0, positive unconditional: 1029, negative: 105, negative conditional: 0, negative unconditional: 105, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 105, positive: 52, positive conditional: 0, positive unconditional: 52, negative: 53, negative conditional: 0, negative unconditional: 53, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 202, positive: 94, positive conditional: 0, positive unconditional: 94, negative: 108, negative conditional: 0, negative unconditional: 108, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1134, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 1134, unknown conditional: 0, unknown unconditional: 1134] , Statistics on independence cache: Total cache size (in pairs): 1134, Positive cache size: 1081, Positive conditional cache size: 0, Positive unconditional cache size: 1081, Negative cache size: 53, Negative conditional cache size: 0, Negative unconditional cache size: 53, Independence queries for same thread: 501 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 1583, positive: 939, positive conditional: 939, positive unconditional: 0, negative: 644, negative conditional: 644, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 992, positive: 939, positive conditional: 0, positive unconditional: 939, negative: 53, negative conditional: 0, negative unconditional: 53, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 992, positive: 939, positive conditional: 0, positive unconditional: 939, negative: 53, negative conditional: 0, negative unconditional: 53, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 992, positive: 887, positive conditional: 0, positive unconditional: 887, negative: 105, negative conditional: 0, negative unconditional: 105, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 105, positive: 52, positive conditional: 0, positive unconditional: 52, negative: 53, negative conditional: 0, negative unconditional: 53, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 104, positive: 42, positive conditional: 0, positive unconditional: 42, negative: 62, negative conditional: 0, negative unconditional: 62, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 992, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 992, unknown conditional: 0, unknown unconditional: 992] , Statistics on independence cache: Total cache size (in pairs): 992, Positive cache size: 939, Positive conditional cache size: 0, Positive unconditional cache size: 939, Negative cache size: 53, Negative conditional cache size: 0, Negative unconditional cache size: 53, Independence queries for same thread: 591 - 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: thr1Thread1of1ForFork0 with 1 thread instances CFG has 3 procedures, 89 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1209.5ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 28.6ms, AutomataDifference: 225.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 368.0ms, PartialOrderReductionTime: 354.1ms, HoareTripleCheckerStatistics: 389 SDtfs, 132 SDslu, 163 SDs, 0 SdLazy, 70 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 67.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=544occurred 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: 102.1ms AutomataMinimizationTime, 5 MinimizatonAttempts, 146 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 15.9ms SsaConstructionTime, 100.5ms SatisfiabilityAnalysisTime, 221.7ms 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: 541.2ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 8.7ms, AutomataDifference: 130.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 145.3ms, PartialOrderReductionTime: 143.6ms, HoareTripleCheckerStatistics: 397 SDtfs, 102 SDslu, 179 SDs, 0 SdLazy, 70 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 59.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=457occurred 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: 34.8ms AutomataMinimizationTime, 5 MinimizatonAttempts, 163 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 10.8ms SsaConstructionTime, 44.6ms SatisfiabilityAnalysisTime, 123.5ms InterpolantComputationTime, 192 NumberOfCodeBlocks, 192 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 187 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 - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...