/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread-wmm/safe028_tso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-60729f1 [2020-11-12 00:09:09,118 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-12 00:09:09,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-12 00:09:09,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-12 00:09:09,172 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-12 00:09:09,174 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-12 00:09:09,175 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-12 00:09:09,178 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-12 00:09:09,180 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-12 00:09:09,181 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-12 00:09:09,182 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-12 00:09:09,184 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-12 00:09:09,184 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-12 00:09:09,186 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-12 00:09:09,187 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-12 00:09:09,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-12 00:09:09,190 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-12 00:09:09,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-12 00:09:09,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-12 00:09:09,195 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-12 00:09:09,197 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-12 00:09:09,199 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-12 00:09:09,200 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-12 00:09:09,201 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-12 00:09:09,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-12 00:09:09,209 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-12 00:09:09,210 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-12 00:09:09,211 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-12 00:09:09,212 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-12 00:09:09,213 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-12 00:09:09,213 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-12 00:09:09,214 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-12 00:09:09,215 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-12 00:09:09,215 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-12 00:09:09,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-12 00:09:09,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-12 00:09:09,218 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-SemanticLbe.epf [2020-11-12 00:09:09,247 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-12 00:09:09,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-12 00:09:09,249 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-12 00:09:09,249 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-12 00:09:09,250 INFO L138 SettingsManager]: * Use SBE=true [2020-11-12 00:09:09,250 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-12 00:09:09,250 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-12 00:09:09,250 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-12 00:09:09,251 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-12 00:09:09,251 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-12 00:09:09,251 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-12 00:09:09,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-12 00:09:09,252 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-12 00:09:09,252 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-12 00:09:09,252 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-12 00:09:09,252 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-12 00:09:09,253 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-12 00:09:09,253 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-12 00:09:09,253 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-12 00:09:09,254 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-12 00:09:09,254 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-12 00:09:09,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-12 00:09:09,254 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-12 00:09:09,255 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-12 00:09:09,255 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-12 00:09:09,255 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-12 00:09:09,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-12 00:09:09,256 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-12 00:09:09,256 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-12 00:09:09,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-12 00:09:09,634 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-12 00:09:09,637 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-12 00:09:09,639 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-12 00:09:09,640 INFO L275 PluginConnector]: CDTParser initialized [2020-11-12 00:09:09,641 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe028_tso.opt.i [2020-11-12 00:09:09,721 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/270e620d5/952116688fde468a80b4dccabd9c3007/FLAGf6cd625da [2020-11-12 00:09:10,430 INFO L306 CDTParser]: Found 1 translation units. [2020-11-12 00:09:10,430 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe028_tso.opt.i [2020-11-12 00:09:10,449 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/270e620d5/952116688fde468a80b4dccabd9c3007/FLAGf6cd625da [2020-11-12 00:09:10,706 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/270e620d5/952116688fde468a80b4dccabd9c3007 [2020-11-12 00:09:10,710 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-12 00:09:10,717 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-12 00:09:10,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-12 00:09:10,722 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-12 00:09:10,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-12 00:09:10,726 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:09:10" (1/1) ... [2020-11-12 00:09:10,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63b2c197 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:09:10, skipping insertion in model container [2020-11-12 00:09:10,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:09:10" (1/1) ... [2020-11-12 00:09:10,740 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-12 00:09:10,803 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-12 00:09:11,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-12 00:09:11,195 INFO L203 MainTranslator]: Completed pre-run [2020-11-12 00:09:11,250 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-12 00:09:11,372 INFO L208 MainTranslator]: Completed translation [2020-11-12 00:09:11,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:09:11 WrapperNode [2020-11-12 00:09:11,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-12 00:09:11,376 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-12 00:09:11,376 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-12 00:09:11,376 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-12 00:09:11,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:09:11" (1/1) ... [2020-11-12 00:09:11,401 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:09:11" (1/1) ... [2020-11-12 00:09:11,423 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-12 00:09:11,424 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-12 00:09:11,424 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-12 00:09:11,425 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-12 00:09:11,441 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:09:11" (1/1) ... [2020-11-12 00:09:11,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:09:11" (1/1) ... [2020-11-12 00:09:11,451 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:09:11" (1/1) ... [2020-11-12 00:09:11,452 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:09:11" (1/1) ... [2020-11-12 00:09:11,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:09:11" (1/1) ... [2020-11-12 00:09:11,476 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:09:11" (1/1) ... [2020-11-12 00:09:11,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:09:11" (1/1) ... [2020-11-12 00:09:11,481 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-12 00:09:11,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-12 00:09:11,483 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-12 00:09:11,483 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-12 00:09:11,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:09:11" (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 [2020-11-12 00:09:11,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-12 00:09:11,554 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-12 00:09:11,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-12 00:09:11,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-12 00:09:11,555 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-11-12 00:09:11,555 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-11-12 00:09:11,555 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-11-12 00:09:11,556 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-11-12 00:09:11,556 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-11-12 00:09:11,556 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-11-12 00:09:11,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-12 00:09:11,556 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-12 00:09:11,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-12 00:09:11,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-12 00:09:11,558 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-12 00:09:12,047 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-12 00:09:12,047 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-12 00:09:12,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:09:12 BoogieIcfgContainer [2020-11-12 00:09:12,050 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-12 00:09:12,051 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-12 00:09:12,052 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-12 00:09:12,055 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-12 00:09:12,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:09:10" (1/3) ... [2020-11-12 00:09:12,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@600d0623 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:09:12, skipping insertion in model container [2020-11-12 00:09:12,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:09:11" (2/3) ... [2020-11-12 00:09:12,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@600d0623 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:09:12, skipping insertion in model container [2020-11-12 00:09:12,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:09:12" (3/3) ... [2020-11-12 00:09:12,059 INFO L111 eAbstractionObserver]: Analyzing ICFG safe028_tso.opt.i [2020-11-12 00:09:12,076 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-12 00:09:12,077 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-12 00:09:12,081 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-12 00:09:12,082 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-12 00:09:12,119 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,120 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,120 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,120 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,120 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,120 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,121 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,121 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,121 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,122 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,122 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,122 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,123 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,123 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,123 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,123 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,123 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,124 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,124 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,124 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,124 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,125 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,125 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,125 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,125 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,126 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,126 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,126 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,126 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,126 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,127 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,127 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,127 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,127 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,128 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,128 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,131 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,131 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,131 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,132 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,138 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,138 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,139 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,139 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,143 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,143 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,143 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,144 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 00:09:12,147 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-12 00:09:12,160 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-12 00:09:12,185 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-12 00:09:12,186 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-12 00:09:12,186 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-12 00:09:12,186 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-12 00:09:12,186 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-12 00:09:12,186 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-12 00:09:12,187 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-12 00:09:12,187 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-12 00:09:12,200 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-12 00:09:12,202 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 78 transitions, 171 flow [2020-11-12 00:09:12,205 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 78 transitions, 171 flow [2020-11-12 00:09:12,207 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 78 transitions, 171 flow [2020-11-12 00:09:12,255 INFO L129 PetriNetUnfolder]: 3/75 cut-off events. [2020-11-12 00:09:12,255 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-12 00:09:12,260 INFO L84 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 75 events. 3/75 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 59. Up to 2 conditions per place. [2020-11-12 00:09:12,263 INFO L116 LiptonReduction]: Number of co-enabled transitions 1348 [2020-11-12 00:09:15,834 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-11-12 00:09:15,941 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-11-12 00:09:16,170 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-11-12 00:09:16,278 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-11-12 00:09:16,285 INFO L131 LiptonReduction]: Checked pairs total: 2193 [2020-11-12 00:09:16,285 INFO L133 LiptonReduction]: Total number of compositions: 68 [2020-11-12 00:09:16,291 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 22 transitions, 59 flow [2020-11-12 00:09:16,319 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 274 states, 272 states have (on average 3.0661764705882355) internal successors, (834), 273 states have internal predecessors, (834), 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) [2020-11-12 00:09:16,322 INFO L276 IsEmpty]: Start isEmpty. Operand has 274 states, 272 states have (on average 3.0661764705882355) internal successors, (834), 273 states have internal predecessors, (834), 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) [2020-11-12 00:09:16,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-12 00:09:16,330 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 00:09:16,330 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 00:09:16,331 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 00:09:16,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 00:09:16,337 INFO L82 PathProgramCache]: Analyzing trace with hash 6772746, now seen corresponding path program 1 times [2020-11-12 00:09:16,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 00:09:16,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550719982] [2020-11-12 00:09:16,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 00:09:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 00:09:16,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 00:09:16,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550719982] [2020-11-12 00:09:16,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 00:09:16,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-12 00:09:16,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018096304] [2020-11-12 00:09:16,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-12 00:09:16,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 00:09:16,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-12 00:09:16,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-12 00:09:16,560 INFO L87 Difference]: Start difference. First operand has 274 states, 272 states have (on average 3.0661764705882355) internal successors, (834), 273 states have internal predecessors, (834), 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 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2020-11-12 00:09:16,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 00:09:16,608 INFO L93 Difference]: Finished difference Result 274 states and 786 transitions. [2020-11-12 00:09:16,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-12 00:09:16,610 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2020-11-12 00:09:16,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 00:09:16,636 INFO L225 Difference]: With dead ends: 274 [2020-11-12 00:09:16,636 INFO L226 Difference]: Without dead ends: 226 [2020-11-12 00:09:16,641 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-12 00:09:16,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-11-12 00:09:16,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2020-11-12 00:09:16,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.8177777777777777) internal successors, (634), 225 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) [2020-11-12 00:09:16,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 634 transitions. [2020-11-12 00:09:16,716 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 634 transitions. Word has length 8 [2020-11-12 00:09:16,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 00:09:16,717 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 634 transitions. [2020-11-12 00:09:16,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2020-11-12 00:09:16,717 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 634 transitions. [2020-11-12 00:09:16,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-12 00:09:16,719 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 00:09:16,719 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 00:09:16,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-12 00:09:16,719 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 00:09:16,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 00:09:16,720 INFO L82 PathProgramCache]: Analyzing trace with hash 209947252, now seen corresponding path program 1 times [2020-11-12 00:09:16,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 00:09:16,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742186236] [2020-11-12 00:09:16,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 00:09:16,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 00:09:16,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 00:09:16,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742186236] [2020-11-12 00:09:16,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 00:09:16,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-12 00:09:16,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178331456] [2020-11-12 00:09:16,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-12 00:09:16,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 00:09:16,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-12 00:09:16,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-12 00:09:16,899 INFO L87 Difference]: Start difference. First operand 226 states and 634 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2020-11-12 00:09:16,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 00:09:16,933 INFO L93 Difference]: Finished difference Result 250 states and 668 transitions. [2020-11-12 00:09:16,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-12 00:09:16,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2020-11-12 00:09:16,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 00:09:16,937 INFO L225 Difference]: With dead ends: 250 [2020-11-12 00:09:16,937 INFO L226 Difference]: Without dead ends: 202 [2020-11-12 00:09:16,938 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-12 00:09:16,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-11-12 00:09:16,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2020-11-12 00:09:16,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.746268656716418) internal successors, (552), 201 states have internal predecessors, (552), 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) [2020-11-12 00:09:16,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 552 transitions. [2020-11-12 00:09:16,957 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 552 transitions. Word has length 9 [2020-11-12 00:09:16,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 00:09:16,958 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 552 transitions. [2020-11-12 00:09:16,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2020-11-12 00:09:16,958 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 552 transitions. [2020-11-12 00:09:16,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-12 00:09:16,960 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 00:09:16,960 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 00:09:16,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-12 00:09:16,960 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 00:09:16,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 00:09:16,961 INFO L82 PathProgramCache]: Analyzing trace with hash -2083050867, now seen corresponding path program 1 times [2020-11-12 00:09:16,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 00:09:16,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830173505] [2020-11-12 00:09:16,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 00:09:16,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 00:09:17,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 00:09:17,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830173505] [2020-11-12 00:09:17,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 00:09:17,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-12 00:09:17,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097816772] [2020-11-12 00:09:17,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-12 00:09:17,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 00:09:17,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-12 00:09:17,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-12 00:09:17,112 INFO L87 Difference]: Start difference. First operand 202 states and 552 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2020-11-12 00:09:17,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 00:09:17,225 INFO L93 Difference]: Finished difference Result 274 states and 726 transitions. [2020-11-12 00:09:17,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-12 00:09:17,226 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 10 [2020-11-12 00:09:17,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 00:09:17,228 INFO L225 Difference]: With dead ends: 274 [2020-11-12 00:09:17,228 INFO L226 Difference]: Without dead ends: 166 [2020-11-12 00:09:17,229 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-11-12 00:09:17,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-11-12 00:09:17,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2020-11-12 00:09:17,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.5636363636363635) internal successors, (423), 165 states have internal predecessors, (423), 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) [2020-11-12 00:09:17,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 423 transitions. [2020-11-12 00:09:17,262 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 423 transitions. Word has length 10 [2020-11-12 00:09:17,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 00:09:17,262 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 423 transitions. [2020-11-12 00:09:17,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2020-11-12 00:09:17,263 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 423 transitions. [2020-11-12 00:09:17,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-12 00:09:17,264 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 00:09:17,264 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 00:09:17,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-12 00:09:17,264 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 00:09:17,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 00:09:17,265 INFO L82 PathProgramCache]: Analyzing trace with hash 559562646, now seen corresponding path program 1 times [2020-11-12 00:09:17,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 00:09:17,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034441329] [2020-11-12 00:09:17,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 00:09:17,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 00:09:17,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 00:09:17,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034441329] [2020-11-12 00:09:17,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 00:09:17,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-12 00:09:17,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828149199] [2020-11-12 00:09:17,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-12 00:09:17,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 00:09:17,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-12 00:09:17,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-12 00:09:17,379 INFO L87 Difference]: Start difference. First operand 166 states and 423 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2020-11-12 00:09:17,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 00:09:17,423 INFO L93 Difference]: Finished difference Result 181 states and 419 transitions. [2020-11-12 00:09:17,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-12 00:09:17,425 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2020-11-12 00:09:17,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 00:09:17,426 INFO L225 Difference]: With dead ends: 181 [2020-11-12 00:09:17,427 INFO L226 Difference]: Without dead ends: 142 [2020-11-12 00:09:17,428 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-12 00:09:17,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-11-12 00:09:17,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-11-12 00:09:17,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.3404255319148937) internal successors, (330), 141 states have internal predecessors, (330), 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) [2020-11-12 00:09:17,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 330 transitions. [2020-11-12 00:09:17,449 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 330 transitions. Word has length 11 [2020-11-12 00:09:17,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 00:09:17,449 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 330 transitions. [2020-11-12 00:09:17,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2020-11-12 00:09:17,450 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 330 transitions. [2020-11-12 00:09:17,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-12 00:09:17,452 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 00:09:17,452 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 00:09:17,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-12 00:09:17,453 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 00:09:17,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 00:09:17,453 INFO L82 PathProgramCache]: Analyzing trace with hash 165985485, now seen corresponding path program 1 times [2020-11-12 00:09:17,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 00:09:17,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031365287] [2020-11-12 00:09:17,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 00:09:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 00:09:17,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 00:09:17,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031365287] [2020-11-12 00:09:17,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 00:09:17,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-12 00:09:17,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844278399] [2020-11-12 00:09:17,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-12 00:09:17,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 00:09:17,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-12 00:09:17,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-12 00:09:17,574 INFO L87 Difference]: Start difference. First operand 142 states and 330 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2020-11-12 00:09:17,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 00:09:17,637 INFO L93 Difference]: Finished difference Result 125 states and 260 transitions. [2020-11-12 00:09:17,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-12 00:09:17,642 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2020-11-12 00:09:17,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 00:09:17,644 INFO L225 Difference]: With dead ends: 125 [2020-11-12 00:09:17,644 INFO L226 Difference]: Without dead ends: 98 [2020-11-12 00:09:17,644 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-12 00:09:17,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-12 00:09:17,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-11-12 00:09:17,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 97 states have internal predecessors, (198), 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) [2020-11-12 00:09:17,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 198 transitions. [2020-11-12 00:09:17,654 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 198 transitions. Word has length 12 [2020-11-12 00:09:17,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 00:09:17,654 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 198 transitions. [2020-11-12 00:09:17,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2020-11-12 00:09:17,655 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 198 transitions. [2020-11-12 00:09:17,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-12 00:09:17,659 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 00:09:17,659 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 00:09:17,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-12 00:09:17,660 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 00:09:17,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 00:09:17,661 INFO L82 PathProgramCache]: Analyzing trace with hash -679740279, now seen corresponding path program 1 times [2020-11-12 00:09:17,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 00:09:17,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203565756] [2020-11-12 00:09:17,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 00:09:17,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 00:09:17,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 00:09:17,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203565756] [2020-11-12 00:09:17,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 00:09:17,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-12 00:09:17,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995377330] [2020-11-12 00:09:17,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-12 00:09:17,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 00:09:17,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-12 00:09:17,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-12 00:09:17,785 INFO L87 Difference]: Start difference. First operand 98 states and 198 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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) [2020-11-12 00:09:17,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 00:09:17,837 INFO L93 Difference]: Finished difference Result 85 states and 170 transitions. [2020-11-12 00:09:17,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-12 00:09:17,838 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2020-11-12 00:09:17,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 00:09:17,840 INFO L225 Difference]: With dead ends: 85 [2020-11-12 00:09:17,840 INFO L226 Difference]: Without dead ends: 76 [2020-11-12 00:09:17,841 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-12 00:09:17,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-12 00:09:17,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-11-12 00:09:17,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 75 states have internal predecessors, (154), 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) [2020-11-12 00:09:17,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 154 transitions. [2020-11-12 00:09:17,844 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 154 transitions. Word has length 14 [2020-11-12 00:09:17,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 00:09:17,845 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 154 transitions. [2020-11-12 00:09:17,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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) [2020-11-12 00:09:17,845 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 154 transitions. [2020-11-12 00:09:17,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-12 00:09:17,846 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 00:09:17,846 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 00:09:17,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-12 00:09:17,846 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 00:09:17,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 00:09:17,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1491127363, now seen corresponding path program 1 times [2020-11-12 00:09:17,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 00:09:17,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662708456] [2020-11-12 00:09:17,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 00:09:17,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 00:09:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 00:09:17,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662708456] [2020-11-12 00:09:17,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 00:09:17,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-12 00:09:17,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990254565] [2020-11-12 00:09:17,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-12 00:09:17,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 00:09:17,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-12 00:09:17,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-12 00:09:17,912 INFO L87 Difference]: Start difference. First operand 76 states and 154 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 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) [2020-11-12 00:09:17,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 00:09:17,948 INFO L93 Difference]: Finished difference Result 90 states and 176 transitions. [2020-11-12 00:09:17,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-12 00:09:17,949 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 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 17 [2020-11-12 00:09:17,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 00:09:17,949 INFO L225 Difference]: With dead ends: 90 [2020-11-12 00:09:17,950 INFO L226 Difference]: Without dead ends: 34 [2020-11-12 00:09:17,950 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-12 00:09:17,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-12 00:09:17,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-11-12 00:09:17,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 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) [2020-11-12 00:09:17,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 52 transitions. [2020-11-12 00:09:17,952 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 52 transitions. Word has length 17 [2020-11-12 00:09:17,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 00:09:17,953 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 52 transitions. [2020-11-12 00:09:17,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 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) [2020-11-12 00:09:17,953 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 52 transitions. [2020-11-12 00:09:17,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-12 00:09:17,954 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 00:09:17,954 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 00:09:17,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-12 00:09:17,954 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 00:09:17,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 00:09:17,955 INFO L82 PathProgramCache]: Analyzing trace with hash 342289101, now seen corresponding path program 2 times [2020-11-12 00:09:17,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 00:09:17,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952090170] [2020-11-12 00:09:17,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 00:09:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 00:09:18,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 00:09:18,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952090170] [2020-11-12 00:09:18,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 00:09:18,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-12 00:09:18,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346201831] [2020-11-12 00:09:18,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-12 00:09:18,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 00:09:18,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-12 00:09:18,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-12 00:09:18,011 INFO L87 Difference]: Start difference. First operand 34 states and 52 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 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) [2020-11-12 00:09:18,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 00:09:18,037 INFO L93 Difference]: Finished difference Result 33 states and 51 transitions. [2020-11-12 00:09:18,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-12 00:09:18,037 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 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 17 [2020-11-12 00:09:18,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 00:09:18,038 INFO L225 Difference]: With dead ends: 33 [2020-11-12 00:09:18,038 INFO L226 Difference]: Without dead ends: 0 [2020-11-12 00:09:18,038 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-12 00:09:18,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-12 00:09:18,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-12 00:09:18,039 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) [2020-11-12 00:09:18,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-12 00:09:18,039 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-11-12 00:09:18,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 00:09:18,040 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-12 00:09:18,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 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) [2020-11-12 00:09:18,040 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-12 00:09:18,040 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-12 00:09:18,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-12 00:09:18,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 12:09:18 BasicIcfg [2020-11-12 00:09:18,044 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-12 00:09:18,046 INFO L168 Benchmark]: Toolchain (without parser) took 7333.89 ms. Allocated memory was 302.0 MB in the beginning and 367.0 MB in the end (delta: 65.0 MB). Free memory was 276.4 MB in the beginning and 269.1 MB in the end (delta: 7.2 MB). Peak memory consumption was 73.9 MB. Max. memory is 16.0 GB. [2020-11-12 00:09:18,046 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 302.0 MB. Free memory is still 273.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2020-11-12 00:09:18,047 INFO L168 Benchmark]: CACSL2BoogieTranslator took 652.74 ms. Allocated memory is still 302.0 MB. Free memory was 275.7 MB in the beginning and 276.5 MB in the end (delta: -772.2 kB). Peak memory consumption was 29.9 MB. Max. memory is 16.0 GB. [2020-11-12 00:09:18,048 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.60 ms. Allocated memory is still 302.0 MB. Free memory was 276.5 MB in the beginning and 274.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-12 00:09:18,049 INFO L168 Benchmark]: Boogie Preprocessor took 57.12 ms. Allocated memory is still 302.0 MB. Free memory was 274.4 MB in the beginning and 273.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-12 00:09:18,049 INFO L168 Benchmark]: RCFGBuilder took 567.36 ms. Allocated memory is still 302.0 MB. Free memory was 273.3 MB in the beginning and 250.2 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2020-11-12 00:09:18,050 INFO L168 Benchmark]: TraceAbstraction took 5992.66 ms. Allocated memory was 302.0 MB in the beginning and 367.0 MB in the end (delta: 65.0 MB). Free memory was 249.2 MB in the beginning and 269.1 MB in the end (delta: -19.9 MB). Peak memory consumption was 46.1 MB. Max. memory is 16.0 GB. [2020-11-12 00:09:18,054 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 302.0 MB. Free memory is still 273.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 652.74 ms. Allocated memory is still 302.0 MB. Free memory was 275.7 MB in the beginning and 276.5 MB in the end (delta: -772.2 kB). Peak memory consumption was 29.9 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 47.60 ms. Allocated memory is still 302.0 MB. Free memory was 276.5 MB in the beginning and 274.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 57.12 ms. Allocated memory is still 302.0 MB. Free memory was 274.4 MB in the beginning and 273.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 567.36 ms. Allocated memory is still 302.0 MB. Free memory was 273.3 MB in the beginning and 250.2 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 5992.66 ms. Allocated memory was 302.0 MB in the beginning and 367.0 MB in the end (delta: 65.0 MB). Free memory was 249.2 MB in the beginning and 269.1 MB in the end (delta: -19.9 MB). Peak memory consumption was 46.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 940 VarBasedMoverChecksPositive, 39 VarBasedMoverChecksNegative, 12 SemBasedMoverChecksPositive, 27 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.3s, 67 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 4.0s, 85 PlacesBefore, 31 PlacesAfterwards, 78 TransitionsBefore, 22 TransitionsAfterwards, 1348 CoEnabledTransitionPairs, 5 FixpointIterations, 18 TrivialSequentialCompositions, 40 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 2 ChoiceCompositions, 68 TotalNumberOfCompositions, 2193 MoverChecksTotal - PositiveResult [Line: 17]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.8s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.1s, HoareTripleCheckerStatistics: 154 SDtfs, 172 SDslu, 280 SDs, 0 SdLazy, 147 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=274occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 98 NumberOfCodeBlocks, 98 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 90 ConstructedInterpolants, 0 QuantifiedInterpolants, 3344 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...