/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-bf4350c [2020-09-17 01:53:46,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-17 01:53:46,232 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-17 01:53:46,258 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-17 01:53:46,259 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-17 01:53:46,260 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-17 01:53:46,261 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-17 01:53:46,263 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-17 01:53:46,265 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-17 01:53:46,266 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-17 01:53:46,267 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-17 01:53:46,268 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-17 01:53:46,268 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-17 01:53:46,269 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-17 01:53:46,270 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-17 01:53:46,272 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-17 01:53:46,272 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-17 01:53:46,273 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-17 01:53:46,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-17 01:53:46,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-17 01:53:46,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-17 01:53:46,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-17 01:53:46,281 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-17 01:53:46,282 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-17 01:53:46,285 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-17 01:53:46,285 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-17 01:53:46,286 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-17 01:53:46,286 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-17 01:53:46,287 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-17 01:53:46,288 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-17 01:53:46,288 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-17 01:53:46,289 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-17 01:53:46,290 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-17 01:53:46,291 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-17 01:53:46,292 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-17 01:53:46,292 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-17 01:53:46,293 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-17 01:53:46,293 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-17 01:53:46,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-17 01:53:46,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-17 01:53:46,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-17 01:53:46,296 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-17 01:53:46,323 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-17 01:53:46,326 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-17 01:53:46,327 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-17 01:53:46,328 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-17 01:53:46,328 INFO L138 SettingsManager]: * Use SBE=true [2020-09-17 01:53:46,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-17 01:53:46,328 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-17 01:53:46,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-17 01:53:46,329 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-17 01:53:46,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-17 01:53:46,334 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-17 01:53:46,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-17 01:53:46,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-17 01:53:46,335 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-17 01:53:46,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-17 01:53:46,335 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-17 01:53:46,335 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-17 01:53:46,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-17 01:53:46,336 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-17 01:53:46,336 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-17 01:53:46,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-17 01:53:46,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-17 01:53:46,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-17 01:53:46,338 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-17 01:53:46,338 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-17 01:53:46,338 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-17 01:53:46,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-17 01:53:46,340 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-17 01:53:46,340 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-17 01:53:46,340 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-17 01:53:46,799 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-17 01:53:46,816 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-17 01:53:46,821 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-17 01:53:46,823 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-17 01:53:46,823 INFO L275 PluginConnector]: CDTParser initialized [2020-09-17 01:53:46,824 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2020-09-17 01:53:46,908 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec3f9ccb3/adc08b53661f4803862f5fb2aebf4e52/FLAG758a5e438 [2020-09-17 01:53:47,684 INFO L306 CDTParser]: Found 1 translation units. [2020-09-17 01:53:47,685 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2020-09-17 01:53:47,706 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec3f9ccb3/adc08b53661f4803862f5fb2aebf4e52/FLAG758a5e438 [2020-09-17 01:53:47,921 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec3f9ccb3/adc08b53661f4803862f5fb2aebf4e52 [2020-09-17 01:53:47,935 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-17 01:53:47,940 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-17 01:53:47,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-17 01:53:47,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-17 01:53:47,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-17 01:53:47,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 01:53:47" (1/1) ... [2020-09-17 01:53:47,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62fc1a9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 01:53:47, skipping insertion in model container [2020-09-17 01:53:47,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 01:53:47" (1/1) ... [2020-09-17 01:53:47,966 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-17 01:53:48,047 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-17 01:53:48,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-17 01:53:48,802 INFO L203 MainTranslator]: Completed pre-run [2020-09-17 01:53:48,859 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-17 01:53:49,085 INFO L208 MainTranslator]: Completed translation [2020-09-17 01:53:49,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 01:53:49 WrapperNode [2020-09-17 01:53:49,087 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-17 01:53:49,089 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-17 01:53:49,089 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-17 01:53:49,089 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-17 01:53:49,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 01:53:49" (1/1) ... [2020-09-17 01:53:49,129 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 01:53:49" (1/1) ... [2020-09-17 01:53:49,161 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-17 01:53:49,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-17 01:53:49,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-17 01:53:49,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-17 01:53:49,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 01:53:49" (1/1) ... [2020-09-17 01:53:49,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 01:53:49" (1/1) ... [2020-09-17 01:53:49,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 01:53:49" (1/1) ... [2020-09-17 01:53:49,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 01:53:49" (1/1) ... [2020-09-17 01:53:49,185 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 01:53:49" (1/1) ... [2020-09-17 01:53:49,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 01:53:49" (1/1) ... [2020-09-17 01:53:49,196 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 01:53:49" (1/1) ... [2020-09-17 01:53:49,200 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-17 01:53:49,201 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-17 01:53:49,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-17 01:53:49,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-17 01:53:49,204 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 01:53:49" (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 [2020-09-17 01:53:49,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-17 01:53:49,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-17 01:53:49,291 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-17 01:53:49,292 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_datarace [2020-09-17 01:53:49,292 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_datarace [2020-09-17 01:53:49,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-17 01:53:49,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-17 01:53:49,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-17 01:53:49,296 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-17 01:53:49,785 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-17 01:53:49,786 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-09-17 01:53:49,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 01:53:49 BoogieIcfgContainer [2020-09-17 01:53:49,791 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-17 01:53:49,793 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-17 01:53:49,793 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-17 01:53:49,797 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-17 01:53:49,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 01:53:47" (1/3) ... [2020-09-17 01:53:49,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@427d5653 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 01:53:49, skipping insertion in model container [2020-09-17 01:53:49,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 01:53:49" (2/3) ... [2020-09-17 01:53:49,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@427d5653 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 01:53:49, skipping insertion in model container [2020-09-17 01:53:49,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 01:53:49" (3/3) ... [2020-09-17 01:53:49,801 INFO L109 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-2.i [2020-09-17 01:53:49,814 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-17 01:53:49,814 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-17 01:53:49,824 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-17 01:53:49,825 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-17 01:53:49,851 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:49,851 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:49,851 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:49,852 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:49,852 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:49,852 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:49,853 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:49,853 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:49,853 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:49,853 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:49,854 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:49,854 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:49,854 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:49,854 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:49,855 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:49,855 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:49,855 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:49,855 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:49,855 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:49,856 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:49,856 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:49,860 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:49,860 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:49,860 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:49,861 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:49,861 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:49,861 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:49,861 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:49,861 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:49,890 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-17 01:53:49,914 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-17 01:53:49,914 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-17 01:53:49,914 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-17 01:53:49,915 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-17 01:53:49,915 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-17 01:53:49,915 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-17 01:53:49,915 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-17 01:53:49,915 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-17 01:53:49,933 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 82 places, 85 transitions, 178 flow [2020-09-17 01:53:49,935 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 82 places, 85 transitions, 178 flow [2020-09-17 01:53:49,987 INFO L129 PetriNetUnfolder]: 7/84 cut-off events. [2020-09-17 01:53:49,987 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-17 01:53:49,998 INFO L80 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 84 events. 7/84 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-09-17 01:53:50,001 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 82 places, 85 transitions, 178 flow [2020-09-17 01:53:50,035 INFO L129 PetriNetUnfolder]: 7/84 cut-off events. [2020-09-17 01:53:50,035 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-17 01:53:50,036 INFO L80 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 84 events. 7/84 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-09-17 01:53:50,038 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 640 [2020-09-17 01:53:50,039 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-09-17 01:53:51,447 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-09-17 01:53:51,673 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-09-17 01:53:52,309 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-09-17 01:53:52,655 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-09-17 01:53:53,275 WARN L193 SmtUtils]: Spent 547.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-09-17 01:53:53,761 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-09-17 01:53:55,293 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 149 DAG size of output: 131 [2020-09-17 01:53:55,983 WARN L193 SmtUtils]: Spent 679.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-09-17 01:53:55,986 INFO L206 etLargeBlockEncoding]: Checked pairs total: 510 [2020-09-17 01:53:55,986 INFO L214 etLargeBlockEncoding]: Total number of compositions: 78 [2020-09-17 01:53:55,991 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 15 places, 13 transitions, 34 flow [2020-09-17 01:53:56,002 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 17 states. [2020-09-17 01:53:56,005 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-09-17 01:53:56,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-17 01:53:56,014 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:53:56,015 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:53:56,016 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:53:56,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:53:56,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1450466956, now seen corresponding path program 1 times [2020-09-17 01:53:56,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:53:56,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174368543] [2020-09-17 01:53:56,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:53:56,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:53:56,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 01:53:56,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174368543] [2020-09-17 01:53:56,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 01:53:56,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-17 01:53:56,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349585961] [2020-09-17 01:53:56,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-17 01:53:56,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:53:56,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-17 01:53:56,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-17 01:53:56,355 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-09-17 01:53:56,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:53:56,395 INFO L93 Difference]: Finished difference Result 20 states and 36 transitions. [2020-09-17 01:53:56,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-17 01:53:56,398 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-09-17 01:53:56,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:53:56,413 INFO L225 Difference]: With dead ends: 20 [2020-09-17 01:53:56,413 INFO L226 Difference]: Without dead ends: 20 [2020-09-17 01:53:56,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-17 01:53:56,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-17 01:53:56,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-09-17 01:53:56,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-17 01:53:56,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 36 transitions. [2020-09-17 01:53:56,462 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 36 transitions. Word has length 8 [2020-09-17 01:53:56,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:53:56,463 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 36 transitions. [2020-09-17 01:53:56,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-17 01:53:56,463 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 36 transitions. [2020-09-17 01:53:56,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-17 01:53:56,464 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:53:56,465 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:53:56,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-17 01:53:56,465 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:53:56,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:53:56,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1984436175, now seen corresponding path program 1 times [2020-09-17 01:53:56,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:53:56,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214131008] [2020-09-17 01:53:56,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:53:56,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:53:56,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 01:53:56,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214131008] [2020-09-17 01:53:56,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470317101] [2020-09-17 01:53:56,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:53:56,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:53:56,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2020-09-17 01:53:56,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:53:56,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-17 01:53:56,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-17 01:53:56,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-09-17 01:53:56,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926404284] [2020-09-17 01:53:56,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-17 01:53:56,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:53:56,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-17 01:53:56,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-17 01:53:56,732 INFO L87 Difference]: Start difference. First operand 20 states and 36 transitions. Second operand 3 states. [2020-09-17 01:53:56,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:53:56,746 INFO L93 Difference]: Finished difference Result 28 states and 52 transitions. [2020-09-17 01:53:56,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-17 01:53:56,747 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-09-17 01:53:56,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:53:56,748 INFO L225 Difference]: With dead ends: 28 [2020-09-17 01:53:56,748 INFO L226 Difference]: Without dead ends: 28 [2020-09-17 01:53:56,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-17 01:53:56,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-17 01:53:56,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2020-09-17 01:53:56,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-17 01:53:56,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 44 transitions. [2020-09-17 01:53:56,755 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 44 transitions. Word has length 9 [2020-09-17 01:53:56,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:53:56,756 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 44 transitions. [2020-09-17 01:53:56,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-17 01:53:56,756 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 44 transitions. [2020-09-17 01:53:56,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 01:53:56,757 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:53:56,757 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:53:56,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-09-17 01:53:56,959 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:53:56,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:53:56,960 INFO L82 PathProgramCache]: Analyzing trace with hash -436238306, now seen corresponding path program 1 times [2020-09-17 01:53:56,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:53:56,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501878066] [2020-09-17 01:53:56,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:53:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:53:57,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 01:53:57,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501878066] [2020-09-17 01:53:57,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880080451] [2020-09-17 01:53:57,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:53:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:53:57,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2020-09-17 01:53:57,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:53:57,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-17 01:53:57,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:53:57,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-09-17 01:53:57,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467264811] [2020-09-17 01:53:57,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-17 01:53:57,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:53:57,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-17 01:53:57,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-17 01:53:57,163 INFO L87 Difference]: Start difference. First operand 24 states and 44 transitions. Second operand 6 states. [2020-09-17 01:53:57,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:53:57,290 INFO L93 Difference]: Finished difference Result 44 states and 84 transitions. [2020-09-17 01:53:57,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 01:53:57,291 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-09-17 01:53:57,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:53:57,292 INFO L225 Difference]: With dead ends: 44 [2020-09-17 01:53:57,292 INFO L226 Difference]: Without dead ends: 44 [2020-09-17 01:53:57,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-09-17 01:53:57,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-17 01:53:57,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2020-09-17 01:53:57,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-17 01:53:57,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2020-09-17 01:53:57,303 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 11 [2020-09-17 01:53:57,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:53:57,304 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2020-09-17 01:53:57,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-17 01:53:57,304 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2020-09-17 01:53:57,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 01:53:57,305 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:53:57,305 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:53:57,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:53:57,508 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:53:57,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:53:57,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1899195462, now seen corresponding path program 2 times [2020-09-17 01:53:57,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:53:57,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213146054] [2020-09-17 01:53:57,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:53:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:53:57,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-17 01:53:57,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213146054] [2020-09-17 01:53:57,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855453578] [2020-09-17 01:53:57,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:53:57,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 01:53:57,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:53:57,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-17 01:53:57,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:53:57,774 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-17 01:53:57,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:53:57,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-17 01:53:57,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433460013] [2020-09-17 01:53:57,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-17 01:53:57,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:53:57,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-17 01:53:57,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-17 01:53:57,777 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand 6 states. [2020-09-17 01:53:57,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:53:57,803 INFO L93 Difference]: Finished difference Result 54 states and 104 transitions. [2020-09-17 01:53:57,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-17 01:53:57,804 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-09-17 01:53:57,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:53:57,805 INFO L225 Difference]: With dead ends: 54 [2020-09-17 01:53:57,806 INFO L226 Difference]: Without dead ends: 54 [2020-09-17 01:53:57,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-17 01:53:57,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-17 01:53:57,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-09-17 01:53:57,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-17 01:53:57,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 94 transitions. [2020-09-17 01:53:57,814 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 94 transitions. Word has length 14 [2020-09-17 01:53:57,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:53:57,815 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 94 transitions. [2020-09-17 01:53:57,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-17 01:53:57,815 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 94 transitions. [2020-09-17 01:53:57,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 01:53:57,816 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:53:57,816 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:53:58,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:53:58,029 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:53:58,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:53:58,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1378033683, now seen corresponding path program 3 times [2020-09-17 01:53:58,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:53:58,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225858025] [2020-09-17 01:53:58,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:53:58,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:53:58,151 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-17 01:53:58,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225858025] [2020-09-17 01:53:58,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394973532] [2020-09-17 01:53:58,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:53:58,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 01:53:58,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:53:58,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-17 01:53:58,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:53:58,272 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-17 01:53:58,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:53:58,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-09-17 01:53:58,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657622516] [2020-09-17 01:53:58,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 01:53:58,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:53:58,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 01:53:58,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-17 01:53:58,274 INFO L87 Difference]: Start difference. First operand 49 states and 94 transitions. Second operand 9 states. [2020-09-17 01:53:58,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:53:58,584 INFO L93 Difference]: Finished difference Result 76 states and 148 transitions. [2020-09-17 01:53:58,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 01:53:58,589 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-09-17 01:53:58,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:53:58,590 INFO L225 Difference]: With dead ends: 76 [2020-09-17 01:53:58,590 INFO L226 Difference]: Without dead ends: 76 [2020-09-17 01:53:58,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2020-09-17 01:53:58,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-17 01:53:58,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2020-09-17 01:53:58,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 01:53:58,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 136 transitions. [2020-09-17 01:53:58,600 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 136 transitions. Word has length 16 [2020-09-17 01:53:58,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:53:58,600 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 136 transitions. [2020-09-17 01:53:58,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 01:53:58,601 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 136 transitions. [2020-09-17 01:53:58,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 01:53:58,602 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:53:58,602 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:53:58,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:53:58,807 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:53:58,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:53:58,808 INFO L82 PathProgramCache]: Analyzing trace with hash -115221563, now seen corresponding path program 4 times [2020-09-17 01:53:58,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:53:58,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514291162] [2020-09-17 01:53:58,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:53:58,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:53:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-17 01:53:58,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514291162] [2020-09-17 01:53:58,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927327001] [2020-09-17 01:53:58,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:53:58,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 01:53:58,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:53:58,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-17 01:53:58,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:53:59,054 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-17 01:53:59,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:53:59,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2020-09-17 01:53:59,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486614241] [2020-09-17 01:53:59,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 01:53:59,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:53:59,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 01:53:59,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-17 01:53:59,056 INFO L87 Difference]: Start difference. First operand 70 states and 136 transitions. Second operand 11 states. [2020-09-17 01:53:59,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:53:59,576 INFO L93 Difference]: Finished difference Result 102 states and 200 transitions. [2020-09-17 01:53:59,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 01:53:59,580 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-09-17 01:53:59,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:53:59,583 INFO L225 Difference]: With dead ends: 102 [2020-09-17 01:53:59,583 INFO L226 Difference]: Without dead ends: 102 [2020-09-17 01:53:59,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2020-09-17 01:53:59,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-17 01:53:59,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2020-09-17 01:53:59,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-17 01:53:59,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 186 transitions. [2020-09-17 01:53:59,597 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 186 transitions. Word has length 19 [2020-09-17 01:53:59,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:53:59,597 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 186 transitions. [2020-09-17 01:53:59,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 01:53:59,598 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 186 transitions. [2020-09-17 01:53:59,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 01:53:59,599 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:53:59,599 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:53:59,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-17 01:53:59,802 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:53:59,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:53:59,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1553067533, now seen corresponding path program 5 times [2020-09-17 01:53:59,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:53:59,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997685701] [2020-09-17 01:53:59,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:53:59,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:53:59,939 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-17 01:53:59,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997685701] [2020-09-17 01:53:59,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921236109] [2020-09-17 01:53:59,940 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:00,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-17 01:54:00,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:54:00,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-17 01:54:00,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:00,080 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-09-17 01:54:00,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:00,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-09-17 01:54:00,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906008789] [2020-09-17 01:54:00,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 01:54:00,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:00,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 01:54:00,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-17 01:54:00,083 INFO L87 Difference]: Start difference. First operand 95 states and 186 transitions. Second operand 13 states. [2020-09-17 01:54:00,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:00,911 INFO L93 Difference]: Finished difference Result 132 states and 260 transitions. [2020-09-17 01:54:00,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 01:54:00,912 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-09-17 01:54:00,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:00,913 INFO L225 Difference]: With dead ends: 132 [2020-09-17 01:54:00,914 INFO L226 Difference]: Without dead ends: 132 [2020-09-17 01:54:00,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=588, Invalid=1218, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 01:54:00,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-17 01:54:00,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2020-09-17 01:54:00,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-17 01:54:00,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 244 transitions. [2020-09-17 01:54:00,925 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 244 transitions. Word has length 22 [2020-09-17 01:54:00,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:00,925 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 244 transitions. [2020-09-17 01:54:00,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 01:54:00,925 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 244 transitions. [2020-09-17 01:54:00,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 01:54:00,927 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:00,927 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:01,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:01,142 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:01,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:01,142 INFO L82 PathProgramCache]: Analyzing trace with hash 390743231, now seen corresponding path program 6 times [2020-09-17 01:54:01,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:01,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603191726] [2020-09-17 01:54:01,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:01,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-17 01:54:01,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603191726] [2020-09-17 01:54:01,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740013763] [2020-09-17 01:54:01,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:01,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-17 01:54:01,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:54:01,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 01:54:01,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:01,502 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-17 01:54:01,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:01,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-09-17 01:54:01,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053974723] [2020-09-17 01:54:01,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 01:54:01,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:01,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 01:54:01,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-17 01:54:01,505 INFO L87 Difference]: Start difference. First operand 124 states and 244 transitions. Second operand 15 states. [2020-09-17 01:54:02,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:02,782 INFO L93 Difference]: Finished difference Result 166 states and 328 transitions. [2020-09-17 01:54:02,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-17 01:54:02,783 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2020-09-17 01:54:02,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:02,784 INFO L225 Difference]: With dead ends: 166 [2020-09-17 01:54:02,785 INFO L226 Difference]: Without dead ends: 166 [2020-09-17 01:54:02,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1008, Invalid=2184, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 01:54:02,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-17 01:54:02,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 157. [2020-09-17 01:54:02,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-17 01:54:02,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 310 transitions. [2020-09-17 01:54:02,797 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 310 transitions. Word has length 25 [2020-09-17 01:54:02,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:02,798 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 310 transitions. [2020-09-17 01:54:02,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 01:54:02,798 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 310 transitions. [2020-09-17 01:54:02,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 01:54:02,800 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:02,801 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:03,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:03,016 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:03,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:03,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1155941881, now seen corresponding path program 7 times [2020-09-17 01:54:03,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:03,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015477246] [2020-09-17 01:54:03,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:03,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-17 01:54:03,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015477246] [2020-09-17 01:54:03,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007239827] [2020-09-17 01:54:03,152 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:03,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 01:54:03,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-17 01:54:03,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:03,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-17 01:54:03,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744158187] [2020-09-17 01:54:03,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 01:54:03,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:03,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 01:54:03,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-17 01:54:03,266 INFO L87 Difference]: Start difference. First operand 157 states and 310 transitions. Second operand 11 states. [2020-09-17 01:54:03,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:03,305 INFO L93 Difference]: Finished difference Result 184 states and 364 transitions. [2020-09-17 01:54:03,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 01:54:03,306 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-09-17 01:54:03,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:03,308 INFO L225 Difference]: With dead ends: 184 [2020-09-17 01:54:03,308 INFO L226 Difference]: Without dead ends: 184 [2020-09-17 01:54:03,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-17 01:54:03,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-09-17 01:54:03,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 175. [2020-09-17 01:54:03,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-09-17 01:54:03,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 346 transitions. [2020-09-17 01:54:03,318 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 346 transitions. Word has length 28 [2020-09-17 01:54:03,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:03,319 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 346 transitions. [2020-09-17 01:54:03,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 01:54:03,319 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 346 transitions. [2020-09-17 01:54:03,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 01:54:03,321 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:03,321 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:03,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-09-17 01:54:03,537 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:03,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:03,538 INFO L82 PathProgramCache]: Analyzing trace with hash -768099092, now seen corresponding path program 8 times [2020-09-17 01:54:03,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:03,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509322258] [2020-09-17 01:54:03,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:03,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:03,681 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-17 01:54:03,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509322258] [2020-09-17 01:54:03,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68585276] [2020-09-17 01:54:03,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:03,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 01:54:03,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:54:03,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 01:54:03,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:03,799 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-17 01:54:03,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:03,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-17 01:54:03,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227795696] [2020-09-17 01:54:03,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 01:54:03,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:03,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 01:54:03,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-09-17 01:54:03,802 INFO L87 Difference]: Start difference. First operand 175 states and 346 transitions. Second operand 12 states. [2020-09-17 01:54:03,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:03,852 INFO L93 Difference]: Finished difference Result 202 states and 400 transitions. [2020-09-17 01:54:03,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 01:54:03,853 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-09-17 01:54:03,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:03,855 INFO L225 Difference]: With dead ends: 202 [2020-09-17 01:54:03,855 INFO L226 Difference]: Without dead ends: 202 [2020-09-17 01:54:03,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-09-17 01:54:03,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-17 01:54:03,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 193. [2020-09-17 01:54:03,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-09-17 01:54:03,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 382 transitions. [2020-09-17 01:54:03,863 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 382 transitions. Word has length 30 [2020-09-17 01:54:03,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:03,864 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 382 transitions. [2020-09-17 01:54:03,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 01:54:03,864 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 382 transitions. [2020-09-17 01:54:03,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 01:54:03,866 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:03,866 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:04,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:04,082 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:04,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:04,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1359430431, now seen corresponding path program 9 times [2020-09-17 01:54:04,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:04,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572990486] [2020-09-17 01:54:04,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:04,238 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-17 01:54:04,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572990486] [2020-09-17 01:54:04,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231682100] [2020-09-17 01:54:04,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:04,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-17 01:54:04,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:54:04,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 01:54:04,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:04,474 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-09-17 01:54:04,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:04,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2020-09-17 01:54:04,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331584829] [2020-09-17 01:54:04,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 01:54:04,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:04,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 01:54:04,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-09-17 01:54:04,477 INFO L87 Difference]: Start difference. First operand 193 states and 382 transitions. Second operand 19 states. [2020-09-17 01:54:06,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:06,971 INFO L93 Difference]: Finished difference Result 244 states and 484 transitions. [2020-09-17 01:54:06,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-09-17 01:54:06,972 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2020-09-17 01:54:06,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:06,975 INFO L225 Difference]: With dead ends: 244 [2020-09-17 01:54:06,975 INFO L226 Difference]: Without dead ends: 244 [2020-09-17 01:54:06,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2376, Invalid=5456, Unknown=0, NotChecked=0, Total=7832 [2020-09-17 01:54:06,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-09-17 01:54:06,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 234. [2020-09-17 01:54:06,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-09-17 01:54:06,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 464 transitions. [2020-09-17 01:54:06,986 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 464 transitions. Word has length 32 [2020-09-17 01:54:06,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:06,986 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 464 transitions. [2020-09-17 01:54:06,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 01:54:06,986 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 464 transitions. [2020-09-17 01:54:06,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-17 01:54:06,988 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:06,988 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:07,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:07,204 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:07,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:07,205 INFO L82 PathProgramCache]: Analyzing trace with hash -377330477, now seen corresponding path program 10 times [2020-09-17 01:54:07,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:07,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338404099] [2020-09-17 01:54:07,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:07,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:07,352 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-09-17 01:54:07,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338404099] [2020-09-17 01:54:07,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076925627] [2020-09-17 01:54:07,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:07,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 01:54:07,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:54:07,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 01:54:07,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:07,684 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-09-17 01:54:07,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:07,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2020-09-17 01:54:07,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566868090] [2020-09-17 01:54:07,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 01:54:07,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:07,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 01:54:07,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2020-09-17 01:54:07,686 INFO L87 Difference]: Start difference. First operand 234 states and 464 transitions. Second operand 21 states. [2020-09-17 01:54:11,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:11,162 INFO L93 Difference]: Finished difference Result 290 states and 576 transitions. [2020-09-17 01:54:11,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2020-09-17 01:54:11,163 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-09-17 01:54:11,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:11,165 INFO L225 Difference]: With dead ends: 290 [2020-09-17 01:54:11,165 INFO L226 Difference]: Without dead ends: 290 [2020-09-17 01:54:11,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3905 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3510, Invalid=8262, Unknown=0, NotChecked=0, Total=11772 [2020-09-17 01:54:11,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-09-17 01:54:11,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 279. [2020-09-17 01:54:11,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-09-17 01:54:11,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 554 transitions. [2020-09-17 01:54:11,177 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 554 transitions. Word has length 35 [2020-09-17 01:54:11,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:11,177 INFO L479 AbstractCegarLoop]: Abstraction has 279 states and 554 transitions. [2020-09-17 01:54:11,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 01:54:11,177 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 554 transitions. [2020-09-17 01:54:11,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-17 01:54:11,179 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:11,179 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:11,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-09-17 01:54:11,395 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:11,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:11,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1024091301, now seen corresponding path program 11 times [2020-09-17 01:54:11,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:11,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158701809] [2020-09-17 01:54:11,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:11,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-09-17 01:54:11,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158701809] [2020-09-17 01:54:11,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918449405] [2020-09-17 01:54:11,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:11,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-17 01:54:11,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:54:11,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 01:54:11,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:11,859 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-09-17 01:54:11,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:11,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2020-09-17 01:54:11,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221694124] [2020-09-17 01:54:11,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 01:54:11,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:11,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 01:54:11,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-09-17 01:54:11,866 INFO L87 Difference]: Start difference. First operand 279 states and 554 transitions. Second operand 23 states. [2020-09-17 01:54:16,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:16,762 INFO L93 Difference]: Finished difference Result 340 states and 676 transitions. [2020-09-17 01:54:16,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2020-09-17 01:54:16,763 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 38 [2020-09-17 01:54:16,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:16,768 INFO L225 Difference]: With dead ends: 340 [2020-09-17 01:54:16,769 INFO L226 Difference]: Without dead ends: 340 [2020-09-17 01:54:16,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5877 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5005, Invalid=12025, Unknown=0, NotChecked=0, Total=17030 [2020-09-17 01:54:16,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-09-17 01:54:16,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 328. [2020-09-17 01:54:16,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-09-17 01:54:16,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 652 transitions. [2020-09-17 01:54:16,782 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 652 transitions. Word has length 38 [2020-09-17 01:54:16,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:16,785 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 652 transitions. [2020-09-17 01:54:16,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 01:54:16,785 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 652 transitions. [2020-09-17 01:54:16,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-17 01:54:16,786 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:16,787 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:17,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-17 01:54:17,002 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:17,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:17,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1006259789, now seen corresponding path program 12 times [2020-09-17 01:54:17,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:17,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674716481] [2020-09-17 01:54:17,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:17,213 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-09-17 01:54:17,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674716481] [2020-09-17 01:54:17,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898085358] [2020-09-17 01:54:17,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:17,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-17 01:54:17,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:54:17,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 01:54:17,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-09-17 01:54:17,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:17,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2020-09-17 01:54:17,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870438171] [2020-09-17 01:54:17,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 01:54:17,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:17,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 01:54:17,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-09-17 01:54:17,557 INFO L87 Difference]: Start difference. First operand 328 states and 652 transitions. Second operand 25 states. [2020-09-17 01:54:24,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:24,065 INFO L93 Difference]: Finished difference Result 394 states and 784 transitions. [2020-09-17 01:54:24,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2020-09-17 01:54:24,066 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 41 [2020-09-17 01:54:24,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:24,069 INFO L225 Difference]: With dead ends: 394 [2020-09-17 01:54:24,069 INFO L226 Difference]: Without dead ends: 394 [2020-09-17 01:54:24,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8505 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=6930, Invalid=16940, Unknown=0, NotChecked=0, Total=23870 [2020-09-17 01:54:24,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-09-17 01:54:24,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 381. [2020-09-17 01:54:24,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2020-09-17 01:54:24,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 758 transitions. [2020-09-17 01:54:24,085 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 758 transitions. Word has length 41 [2020-09-17 01:54:24,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:24,085 INFO L479 AbstractCegarLoop]: Abstraction has 381 states and 758 transitions. [2020-09-17 01:54:24,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 01:54:24,085 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 758 transitions. [2020-09-17 01:54:24,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-17 01:54:24,087 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:24,087 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:24,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-17 01:54:24,302 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:24,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:24,303 INFO L82 PathProgramCache]: Analyzing trace with hash 519022635, now seen corresponding path program 13 times [2020-09-17 01:54:24,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:24,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734005733] [2020-09-17 01:54:24,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:24,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:24,549 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-17 01:54:24,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734005733] [2020-09-17 01:54:24,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217862795] [2020-09-17 01:54:24,550 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:24,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:24,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 01:54:24,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:24,669 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-17 01:54:24,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:24,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 01:54:24,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995446589] [2020-09-17 01:54:24,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 01:54:24,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:24,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 01:54:24,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-17 01:54:24,671 INFO L87 Difference]: Start difference. First operand 381 states and 758 transitions. Second operand 17 states. [2020-09-17 01:54:24,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:24,759 INFO L93 Difference]: Finished difference Result 420 states and 836 transitions. [2020-09-17 01:54:24,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 01:54:24,760 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-09-17 01:54:24,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:24,762 INFO L225 Difference]: With dead ends: 420 [2020-09-17 01:54:24,762 INFO L226 Difference]: Without dead ends: 420 [2020-09-17 01:54:24,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-17 01:54:24,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2020-09-17 01:54:24,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 407. [2020-09-17 01:54:24,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2020-09-17 01:54:24,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 810 transitions. [2020-09-17 01:54:24,773 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 810 transitions. Word has length 44 [2020-09-17 01:54:24,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:24,774 INFO L479 AbstractCegarLoop]: Abstraction has 407 states and 810 transitions. [2020-09-17 01:54:24,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 01:54:24,774 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 810 transitions. [2020-09-17 01:54:24,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-17 01:54:24,775 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:24,776 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:24,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:24,991 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:24,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:24,992 INFO L82 PathProgramCache]: Analyzing trace with hash -942483170, now seen corresponding path program 14 times [2020-09-17 01:54:24,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:24,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234862043] [2020-09-17 01:54:24,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:25,253 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-17 01:54:25,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234862043] [2020-09-17 01:54:25,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110534700] [2020-09-17 01:54:25,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:25,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 01:54:25,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:54:25,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 01:54:25,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:25,375 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-17 01:54:25,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:25,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 01:54:25,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840180263] [2020-09-17 01:54:25,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 01:54:25,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:25,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 01:54:25,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-17 01:54:25,377 INFO L87 Difference]: Start difference. First operand 407 states and 810 transitions. Second operand 18 states. [2020-09-17 01:54:25,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:25,455 INFO L93 Difference]: Finished difference Result 446 states and 888 transitions. [2020-09-17 01:54:25,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 01:54:25,458 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-09-17 01:54:25,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:25,462 INFO L225 Difference]: With dead ends: 446 [2020-09-17 01:54:25,462 INFO L226 Difference]: Without dead ends: 446 [2020-09-17 01:54:25,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-17 01:54:25,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-09-17 01:54:25,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 433. [2020-09-17 01:54:25,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433 states. [2020-09-17 01:54:25,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 862 transitions. [2020-09-17 01:54:25,477 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 862 transitions. Word has length 46 [2020-09-17 01:54:25,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:25,477 INFO L479 AbstractCegarLoop]: Abstraction has 433 states and 862 transitions. [2020-09-17 01:54:25,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 01:54:25,478 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 862 transitions. [2020-09-17 01:54:25,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-17 01:54:25,479 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:25,479 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:25,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-17 01:54:25,695 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:25,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:25,695 INFO L82 PathProgramCache]: Analyzing trace with hash -995255983, now seen corresponding path program 15 times [2020-09-17 01:54:25,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:25,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936486037] [2020-09-17 01:54:25,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:25,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:26,006 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-17 01:54:26,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936486037] [2020-09-17 01:54:26,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568090613] [2020-09-17 01:54:26,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:26,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-17 01:54:26,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:54:26,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 01:54:26,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:26,360 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-09-17 01:54:26,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:26,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 29 [2020-09-17 01:54:26,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76229625] [2020-09-17 01:54:26,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 01:54:26,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:26,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 01:54:26,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2020-09-17 01:54:26,363 INFO L87 Difference]: Start difference. First operand 433 states and 862 transitions. Second operand 29 states. [2020-09-17 01:54:37,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:37,187 INFO L93 Difference]: Finished difference Result 508 states and 1012 transitions. [2020-09-17 01:54:37,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2020-09-17 01:54:37,191 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 48 [2020-09-17 01:54:37,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:37,193 INFO L225 Difference]: With dead ends: 508 [2020-09-17 01:54:37,194 INFO L226 Difference]: Without dead ends: 508 [2020-09-17 01:54:37,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15565 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=11934, Invalid=29886, Unknown=0, NotChecked=0, Total=41820 [2020-09-17 01:54:37,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2020-09-17 01:54:37,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 494. [2020-09-17 01:54:37,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2020-09-17 01:54:37,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 984 transitions. [2020-09-17 01:54:37,209 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 984 transitions. Word has length 48 [2020-09-17 01:54:37,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:37,209 INFO L479 AbstractCegarLoop]: Abstraction has 494 states and 984 transitions. [2020-09-17 01:54:37,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 01:54:37,210 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 984 transitions. [2020-09-17 01:54:37,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-17 01:54:37,212 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:37,212 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:37,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-17 01:54:37,426 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:37,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:37,427 INFO L82 PathProgramCache]: Analyzing trace with hash -954639647, now seen corresponding path program 16 times [2020-09-17 01:54:37,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:37,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780901300] [2020-09-17 01:54:37,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:37,739 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-09-17 01:54:37,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780901300] [2020-09-17 01:54:37,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284705358] [2020-09-17 01:54:37,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:37,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 01:54:37,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:54:37,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 01:54:37,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:37,878 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-09-17 01:54:37,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:37,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 01:54:37,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009908310] [2020-09-17 01:54:37,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 01:54:37,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:37,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 01:54:37,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-17 01:54:37,882 INFO L87 Difference]: Start difference. First operand 494 states and 984 transitions. Second operand 20 states. [2020-09-17 01:54:37,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:37,961 INFO L93 Difference]: Finished difference Result 536 states and 1068 transitions. [2020-09-17 01:54:37,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 01:54:37,962 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 51 [2020-09-17 01:54:37,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:37,965 INFO L225 Difference]: With dead ends: 536 [2020-09-17 01:54:37,965 INFO L226 Difference]: Without dead ends: 536 [2020-09-17 01:54:37,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-17 01:54:37,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-09-17 01:54:37,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 522. [2020-09-17 01:54:37,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2020-09-17 01:54:37,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1040 transitions. [2020-09-17 01:54:37,977 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1040 transitions. Word has length 51 [2020-09-17 01:54:37,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:37,977 INFO L479 AbstractCegarLoop]: Abstraction has 522 states and 1040 transitions. [2020-09-17 01:54:37,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 01:54:37,977 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1040 transitions. [2020-09-17 01:54:37,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-17 01:54:37,979 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:37,979 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:38,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-17 01:54:38,194 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:38,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:38,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1140997490, now seen corresponding path program 17 times [2020-09-17 01:54:38,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:38,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306278304] [2020-09-17 01:54:38,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:38,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:38,590 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-09-17 01:54:38,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306278304] [2020-09-17 01:54:38,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397719880] [2020-09-17 01:54:38,591 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:38,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-09-17 01:54:38,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:54:38,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 01:54:38,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:38,989 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-09-17 01:54:38,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:38,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 32 [2020-09-17 01:54:38,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895104979] [2020-09-17 01:54:38,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-17 01:54:38,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:38,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-17 01:54:38,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2020-09-17 01:54:38,992 INFO L87 Difference]: Start difference. First operand 522 states and 1040 transitions. Second operand 32 states. [2020-09-17 01:54:54,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:54,618 INFO L93 Difference]: Finished difference Result 604 states and 1204 transitions. [2020-09-17 01:54:54,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 248 states. [2020-09-17 01:54:54,619 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 53 [2020-09-17 01:54:54,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:54,622 INFO L225 Difference]: With dead ends: 604 [2020-09-17 01:54:54,623 INFO L226 Difference]: Without dead ends: 604 [2020-09-17 01:54:54,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23424 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=17290, Invalid=43966, Unknown=0, NotChecked=0, Total=61256 [2020-09-17 01:54:54,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2020-09-17 01:54:54,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 589. [2020-09-17 01:54:54,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 589 states. [2020-09-17 01:54:54,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1174 transitions. [2020-09-17 01:54:54,640 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1174 transitions. Word has length 53 [2020-09-17 01:54:54,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:54,640 INFO L479 AbstractCegarLoop]: Abstraction has 589 states and 1174 transitions. [2020-09-17 01:54:54,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-17 01:54:54,640 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1174 transitions. [2020-09-17 01:54:54,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-17 01:54:54,642 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:54,642 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:54,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:54,857 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:54,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:54,858 INFO L82 PathProgramCache]: Analyzing trace with hash 625395594, now seen corresponding path program 18 times [2020-09-17 01:54:54,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:54,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320828060] [2020-09-17 01:54:54,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:54,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:55,227 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-09-17 01:54:55,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320828060] [2020-09-17 01:54:55,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663926294] [2020-09-17 01:54:55,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:55,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-09-17 01:54:55,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:54:55,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 01:54:55,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:55,724 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 18 proven. 78 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-09-17 01:54:55,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:55,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15] total 34 [2020-09-17 01:54:55,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231763715] [2020-09-17 01:54:55,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-17 01:54:55,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:55,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-17 01:54:55,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=808, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 01:54:55,726 INFO L87 Difference]: Start difference. First operand 589 states and 1174 transitions. Second operand 34 states. [2020-09-17 01:55:15,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:55:15,813 INFO L93 Difference]: Finished difference Result 676 states and 1348 transitions. [2020-09-17 01:55:15,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 281 states. [2020-09-17 01:55:15,814 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 56 [2020-09-17 01:55:15,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:55:15,817 INFO L225 Difference]: With dead ends: 676 [2020-09-17 01:55:15,817 INFO L226 Difference]: Without dead ends: 676 [2020-09-17 01:55:15,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30615 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=22050, Invalid=56630, Unknown=0, NotChecked=0, Total=78680 [2020-09-17 01:55:15,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2020-09-17 01:55:15,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 660. [2020-09-17 01:55:15,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 660 states. [2020-09-17 01:55:15,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1316 transitions. [2020-09-17 01:55:15,835 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1316 transitions. Word has length 56 [2020-09-17 01:55:15,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:55:15,835 INFO L479 AbstractCegarLoop]: Abstraction has 660 states and 1316 transitions. [2020-09-17 01:55:15,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-17 01:55:15,835 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1316 transitions. [2020-09-17 01:55:15,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-17 01:55:15,837 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:55:15,837 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:55:16,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:55:16,050 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:55:16,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:55:16,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1598900536, now seen corresponding path program 19 times [2020-09-17 01:55:16,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:55:16,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076335432] [2020-09-17 01:55:16,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:55:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:55:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-09-17 01:55:16,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076335432] [2020-09-17 01:55:16,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092756999] [2020-09-17 01:55:16,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:55:16,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:55:16,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 01:55:16,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:55:16,644 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-09-17 01:55:16,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:55:16,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 01:55:16,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193131806] [2020-09-17 01:55:16,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 01:55:16,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:55:16,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 01:55:16,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-17 01:55:16,646 INFO L87 Difference]: Start difference. First operand 660 states and 1316 transitions. Second operand 23 states. [2020-09-17 01:55:16,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:55:16,767 INFO L93 Difference]: Finished difference Result 692 states and 1380 transitions. [2020-09-17 01:55:16,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 01:55:16,768 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 59 [2020-09-17 01:55:16,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:55:16,771 INFO L225 Difference]: With dead ends: 692 [2020-09-17 01:55:16,771 INFO L226 Difference]: Without dead ends: 692 [2020-09-17 01:55:16,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-17 01:55:16,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2020-09-17 01:55:16,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 692. [2020-09-17 01:55:16,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 692 states. [2020-09-17 01:55:16,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1380 transitions. [2020-09-17 01:55:16,789 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1380 transitions. Word has length 59 [2020-09-17 01:55:16,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:55:16,789 INFO L479 AbstractCegarLoop]: Abstraction has 692 states and 1380 transitions. [2020-09-17 01:55:16,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 01:55:16,789 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1380 transitions. [2020-09-17 01:55:16,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-17 01:55:16,792 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:55:16,792 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:55:17,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-17 01:55:17,006 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:55:17,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:55:17,006 INFO L82 PathProgramCache]: Analyzing trace with hash 746529141, now seen corresponding path program 20 times [2020-09-17 01:55:17,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:55:17,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979929644] [2020-09-17 01:55:17,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:55:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:55:17,280 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 20 proven. 91 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-09-17 01:55:17,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979929644] [2020-09-17 01:55:17,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766946723] [2020-09-17 01:55:17,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:55:17,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 01:55:17,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:55:17,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 55 conjunts are in the unsatisfiable core [2020-09-17 01:55:17,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:55:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 491 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 01:55:19,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:55:19,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 54] total 70 [2020-09-17 01:55:19,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137002170] [2020-09-17 01:55:19,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-09-17 01:55:19,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:55:19,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-09-17 01:55:19,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=979, Invalid=3851, Unknown=0, NotChecked=0, Total=4830 [2020-09-17 01:55:19,854 INFO L87 Difference]: Start difference. First operand 692 states and 1380 transitions. Second operand 70 states. [2020-09-17 01:57:57,840 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-09-17 02:02:49,100 WARN L193 SmtUtils]: Spent 819.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-09-17 02:03:27,762 WARN L193 SmtUtils]: Spent 867.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-09-17 02:03:31,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:03:31,540 INFO L93 Difference]: Finished difference Result 38046 states and 76072 transitions. [2020-09-17 02:03:31,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3033 states. [2020-09-17 02:03:31,544 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 61 [2020-09-17 02:03:31,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:03:31,680 INFO L225 Difference]: With dead ends: 38046 [2020-09-17 02:03:31,680 INFO L226 Difference]: Without dead ends: 38018 [2020-09-17 02:03:31,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3485 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 3044 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6217742 ImplicationChecksByTransitivity, 434.9s TimeCoverageRelationStatistics Valid=2254412, Invalid=7020658, Unknown=0, NotChecked=0, Total=9275070 [2020-09-17 02:03:32,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38018 states. [2020-09-17 02:03:32,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38018 to 1389. [2020-09-17 02:03:32,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1389 states. [2020-09-17 02:03:32,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 2931 transitions. [2020-09-17 02:03:32,246 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 2931 transitions. Word has length 61 [2020-09-17 02:03:32,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:03:32,247 INFO L479 AbstractCegarLoop]: Abstraction has 1389 states and 2931 transitions. [2020-09-17 02:03:32,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-09-17 02:03:32,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 2931 transitions. [2020-09-17 02:03:32,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-17 02:03:32,251 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:03:32,251 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:03:32,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-17 02:03:32,464 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:03:32,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:03:32,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1697933392, now seen corresponding path program 21 times [2020-09-17 02:03:32,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:03:32,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096138817] [2020-09-17 02:03:32,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:03:32,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:03:33,059 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 20 proven. 105 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-09-17 02:03:33,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096138817] [2020-09-17 02:03:33,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019479958] [2020-09-17 02:03:33,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:03:33,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 02:03:33,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:03:33,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:03:33,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:03:33,225 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 20 proven. 105 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-09-17 02:03:33,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:03:33,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:03:33,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534223991] [2020-09-17 02:03:33,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:03:33,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:03:33,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:03:33,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:03:33,227 INFO L87 Difference]: Start difference. First operand 1389 states and 2931 transitions. Second operand 18 states. [2020-09-17 02:03:33,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:03:33,478 INFO L93 Difference]: Finished difference Result 1604 states and 3256 transitions. [2020-09-17 02:03:33,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:03:33,481 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 62 [2020-09-17 02:03:33,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:03:33,486 INFO L225 Difference]: With dead ends: 1604 [2020-09-17 02:03:33,486 INFO L226 Difference]: Without dead ends: 1604 [2020-09-17 02:03:33,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:03:33,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2020-09-17 02:03:33,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1471. [2020-09-17 02:03:33,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1471 states. [2020-09-17 02:03:33,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 3095 transitions. [2020-09-17 02:03:33,513 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 3095 transitions. Word has length 62 [2020-09-17 02:03:33,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:03:33,514 INFO L479 AbstractCegarLoop]: Abstraction has 1471 states and 3095 transitions. [2020-09-17 02:03:33,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:03:33,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 3095 transitions. [2020-09-17 02:03:33,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-17 02:03:33,519 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:03:33,519 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:03:33,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:03:33,733 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:03:33,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:03:33,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1126694101, now seen corresponding path program 22 times [2020-09-17 02:03:33,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:03:33,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720109525] [2020-09-17 02:03:33,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:03:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:03:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 20 proven. 120 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-09-17 02:03:34,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720109525] [2020-09-17 02:03:34,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458705512] [2020-09-17 02:03:34,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:03:34,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:03:34,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:03:34,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 57 conjunts are in the unsatisfiable core [2020-09-17 02:03:34,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:03:41,666 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:03:41,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:03:41,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 56] total 74 [2020-09-17 02:03:41,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975524247] [2020-09-17 02:03:41,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-09-17 02:03:41,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:03:41,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-09-17 02:03:41,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=4317, Unknown=0, NotChecked=0, Total=5402 [2020-09-17 02:03:41,669 INFO L87 Difference]: Start difference. First operand 1471 states and 3095 transitions. Second operand 74 states.