/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-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-60655ea [2020-09-15 00:37:27,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-15 00:37:27,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-15 00:37:27,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-15 00:37:27,261 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-15 00:37:27,262 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-15 00:37:27,264 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-15 00:37:27,266 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-15 00:37:27,268 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-15 00:37:27,269 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-15 00:37:27,270 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-15 00:37:27,271 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-15 00:37:27,272 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-15 00:37:27,273 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-15 00:37:27,274 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-15 00:37:27,276 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-15 00:37:27,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-15 00:37:27,278 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-15 00:37:27,280 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-15 00:37:27,282 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-15 00:37:27,284 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-15 00:37:27,286 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-15 00:37:27,287 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-15 00:37:27,288 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-15 00:37:27,291 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-15 00:37:27,295 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-15 00:37:27,296 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-15 00:37:27,298 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-15 00:37:27,299 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-15 00:37:27,300 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-15 00:37:27,300 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-15 00:37:27,301 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-15 00:37:27,301 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-15 00:37:27,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-15 00:37:27,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-15 00:37:27,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-15 00:37:27,305 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-15 00:37:27,333 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-15 00:37:27,333 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-15 00:37:27,334 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-15 00:37:27,335 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-15 00:37:27,335 INFO L138 SettingsManager]: * Use SBE=true [2020-09-15 00:37:27,335 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-15 00:37:27,335 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-15 00:37:27,336 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-15 00:37:27,336 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-15 00:37:27,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-15 00:37:27,336 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-15 00:37:27,336 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-15 00:37:27,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-15 00:37:27,337 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-15 00:37:27,337 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-15 00:37:27,337 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-15 00:37:27,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-15 00:37:27,338 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-15 00:37:27,338 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-15 00:37:27,338 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-15 00:37:27,338 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-15 00:37:27,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-15 00:37:27,339 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-15 00:37:27,339 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-15 00:37:27,339 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-15 00:37:27,339 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-15 00:37:27,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-15 00:37:27,340 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-15 00:37:27,340 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-15 00:37:27,340 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-15 00:37:27,786 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-15 00:37:27,812 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-15 00:37:27,816 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-15 00:37:27,818 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-15 00:37:27,819 INFO L275 PluginConnector]: CDTParser initialized [2020-09-15 00:37:27,821 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-09-15 00:37:27,924 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77eae322a/cd6485b74bda493a82c5434b7fe04b0e/FLAGb1aff0d22 [2020-09-15 00:37:28,713 INFO L306 CDTParser]: Found 1 translation units. [2020-09-15 00:37:28,714 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-09-15 00:37:28,741 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77eae322a/cd6485b74bda493a82c5434b7fe04b0e/FLAGb1aff0d22 [2020-09-15 00:37:28,857 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77eae322a/cd6485b74bda493a82c5434b7fe04b0e [2020-09-15 00:37:28,873 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-15 00:37:28,879 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-15 00:37:28,884 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-15 00:37:28,884 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-15 00:37:28,888 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-15 00:37:28,889 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 12:37:28" (1/1) ... [2020-09-15 00:37:28,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60829e27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 12:37:28, skipping insertion in model container [2020-09-15 00:37:28,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 12:37:28" (1/1) ... [2020-09-15 00:37:28,905 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-15 00:37:28,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-15 00:37:29,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-15 00:37:29,686 INFO L203 MainTranslator]: Completed pre-run [2020-09-15 00:37:29,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-15 00:37:29,987 INFO L208 MainTranslator]: Completed translation [2020-09-15 00:37:29,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 12:37:29 WrapperNode [2020-09-15 00:37:29,988 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-15 00:37:29,989 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-15 00:37:29,989 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-15 00:37:29,990 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-15 00:37:30,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 12:37:29" (1/1) ... [2020-09-15 00:37:30,032 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 12:37:29" (1/1) ... [2020-09-15 00:37:30,072 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-15 00:37:30,072 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-15 00:37:30,073 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-15 00:37:30,073 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-15 00:37:30,091 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 12:37:29" (1/1) ... [2020-09-15 00:37:30,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 12:37:29" (1/1) ... [2020-09-15 00:37:30,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 12:37:29" (1/1) ... [2020-09-15 00:37:30,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 12:37:29" (1/1) ... [2020-09-15 00:37:30,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 12:37:29" (1/1) ... [2020-09-15 00:37:30,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 12:37:29" (1/1) ... [2020-09-15 00:37:30,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 12:37:29" (1/1) ... [2020-09-15 00:37:30,117 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-15 00:37:30,118 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-15 00:37:30,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-15 00:37:30,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-15 00:37:30,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 12:37:29" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:37:30,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-15 00:37:30,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-15 00:37:30,231 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-15 00:37:30,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-15 00:37:30,232 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-09-15 00:37:30,233 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2020-09-15 00:37:30,233 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2020-09-15 00:37:30,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-15 00:37:30,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-15 00:37:30,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-15 00:37:30,239 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-15 00:37:31,048 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-15 00:37:31,049 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-09-15 00:37:31,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 12:37:31 BoogieIcfgContainer [2020-09-15 00:37:31,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-15 00:37:31,055 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-15 00:37:31,055 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-15 00:37:31,059 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-15 00:37:31,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 12:37:28" (1/3) ... [2020-09-15 00:37:31,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30ad8086 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 12:37:31, skipping insertion in model container [2020-09-15 00:37:31,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 12:37:29" (2/3) ... [2020-09-15 00:37:31,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30ad8086 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 12:37:31, skipping insertion in model container [2020-09-15 00:37:31,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 12:37:31" (3/3) ... [2020-09-15 00:37:31,063 INFO L109 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2020-09-15 00:37:31,076 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-15 00:37:31,076 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-15 00:37:31,086 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-15 00:37:31,088 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-15 00:37:31,115 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,115 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,115 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,115 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,116 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,116 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,116 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,117 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,117 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,117 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,117 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,117 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,118 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,118 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,118 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,119 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,119 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,119 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,119 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,119 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,120 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,120 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,120 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,125 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,125 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,125 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,125 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,126 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,126 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,126 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,126 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,126 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,154 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-15 00:37:31,180 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-15 00:37:31,180 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-15 00:37:31,180 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-15 00:37:31,180 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-15 00:37:31,181 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-15 00:37:31,181 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-15 00:37:31,181 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-15 00:37:31,181 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-15 00:37:31,200 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 81 transitions, 170 flow [2020-09-15 00:37:31,203 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 170 flow [2020-09-15 00:37:31,256 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2020-09-15 00:37:31,256 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-15 00:37:31,262 INFO L80 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 80 events. 7/80 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 79 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-09-15 00:37:31,265 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 170 flow [2020-09-15 00:37:31,287 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2020-09-15 00:37:31,287 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-15 00:37:31,288 INFO L80 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 80 events. 7/80 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 79 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-09-15 00:37:31,290 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 646 [2020-09-15 00:37:31,291 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-09-15 00:37:33,667 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-09-15 00:37:33,837 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-09-15 00:37:34,587 WARN L193 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 110 [2020-09-15 00:37:34,903 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-09-15 00:37:34,917 INFO L206 etLargeBlockEncoding]: Checked pairs total: 738 [2020-09-15 00:37:34,917 INFO L214 etLargeBlockEncoding]: Total number of compositions: 70 [2020-09-15 00:37:34,922 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 19 places, 17 transitions, 42 flow [2020-09-15 00:37:34,934 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2020-09-15 00:37:34,937 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-09-15 00:37:34,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-15 00:37:34,945 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:34,946 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:34,947 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:34,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:34,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1717538151, now seen corresponding path program 1 times [2020-09-15 00:37:34,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:34,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143758848] [2020-09-15 00:37:34,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:35,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:35,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 00:37:35,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143758848] [2020-09-15 00:37:35,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 00:37:35,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 00:37:35,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929857426] [2020-09-15 00:37:35,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-15 00:37:35,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:35,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-15 00:37:35,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-15 00:37:35,255 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-09-15 00:37:35,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:37:35,301 INFO L93 Difference]: Finished difference Result 52 states and 100 transitions. [2020-09-15 00:37:35,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-15 00:37:35,303 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-09-15 00:37:35,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:37:35,318 INFO L225 Difference]: With dead ends: 52 [2020-09-15 00:37:35,318 INFO L226 Difference]: Without dead ends: 52 [2020-09-15 00:37:35,320 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 [2020-09-15 00:37:35,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-15 00:37:35,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-09-15 00:37:35,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-15 00:37:35,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2020-09-15 00:37:35,370 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 8 [2020-09-15 00:37:35,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:37:35,371 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2020-09-15 00:37:35,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-15 00:37:35,371 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2020-09-15 00:37:35,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 00:37:35,372 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:35,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:35,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-15 00:37:35,373 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:35,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:35,373 INFO L82 PathProgramCache]: Analyzing trace with hash 62706239, now seen corresponding path program 1 times [2020-09-15 00:37:35,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:35,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227204881] [2020-09-15 00:37:35,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:35,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 00:37:35,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227204881] [2020-09-15 00:37:35,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 00:37:35,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 00:37:35,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637524819] [2020-09-15 00:37:35,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-15 00:37:35,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:35,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-15 00:37:35,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-15 00:37:35,515 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand 3 states. [2020-09-15 00:37:35,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:37:35,544 INFO L93 Difference]: Finished difference Result 64 states and 124 transitions. [2020-09-15 00:37:35,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-15 00:37:35,545 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-09-15 00:37:35,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:37:35,546 INFO L225 Difference]: With dead ends: 64 [2020-09-15 00:37:35,546 INFO L226 Difference]: Without dead ends: 64 [2020-09-15 00:37:35,547 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 [2020-09-15 00:37:35,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-15 00:37:35,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2020-09-15 00:37:35,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 00:37:35,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 88 transitions. [2020-09-15 00:37:35,556 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 88 transitions. Word has length 11 [2020-09-15 00:37:35,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:37:35,556 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 88 transitions. [2020-09-15 00:37:35,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-15 00:37:35,557 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 88 transitions. [2020-09-15 00:37:35,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 00:37:35,558 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:35,558 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:35,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-15 00:37:35,558 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:35,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:35,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1954756591, now seen corresponding path program 1 times [2020-09-15 00:37:35,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:35,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601073201] [2020-09-15 00:37:35,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:35,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 00:37:35,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601073201] [2020-09-15 00:37:35,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 00:37:35,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 00:37:35,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435921247] [2020-09-15 00:37:35,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-15 00:37:35,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:35,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-15 00:37:35,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-15 00:37:35,643 INFO L87 Difference]: Start difference. First operand 46 states and 88 transitions. Second operand 3 states. [2020-09-15 00:37:35,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:37:35,660 INFO L93 Difference]: Finished difference Result 40 states and 66 transitions. [2020-09-15 00:37:35,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-15 00:37:35,661 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-09-15 00:37:35,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:37:35,662 INFO L225 Difference]: With dead ends: 40 [2020-09-15 00:37:35,662 INFO L226 Difference]: Without dead ends: 40 [2020-09-15 00:37:35,663 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 [2020-09-15 00:37:35,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-15 00:37:35,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-09-15 00:37:35,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-15 00:37:35,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 66 transitions. [2020-09-15 00:37:35,669 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 66 transitions. Word has length 15 [2020-09-15 00:37:35,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:37:35,670 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 66 transitions. [2020-09-15 00:37:35,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-15 00:37:35,670 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 66 transitions. [2020-09-15 00:37:35,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 00:37:35,671 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:35,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:35,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-15 00:37:35,671 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:35,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:35,672 INFO L82 PathProgramCache]: Analyzing trace with hash 525517821, now seen corresponding path program 2 times [2020-09-15 00:37:35,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:35,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968039078] [2020-09-15 00:37:35,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:35,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:35,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 00:37:35,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968039078] [2020-09-15 00:37:35,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303823358] [2020-09-15 00:37:35,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:37:35,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 00:37:35,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:37:35,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2020-09-15 00:37:35,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:37:35,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 00:37:35,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:37:35,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-09-15 00:37:35,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85135281] [2020-09-15 00:37:35,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-15 00:37:35,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:35,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-15 00:37:35,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-15 00:37:35,962 INFO L87 Difference]: Start difference. First operand 40 states and 66 transitions. Second operand 6 states. [2020-09-15 00:37:36,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:37:36,132 INFO L93 Difference]: Finished difference Result 104 states and 159 transitions. [2020-09-15 00:37:36,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 00:37:36,135 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-09-15 00:37:36,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:37:36,136 INFO L225 Difference]: With dead ends: 104 [2020-09-15 00:37:36,136 INFO L226 Difference]: Without dead ends: 104 [2020-09-15 00:37:36,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-09-15 00:37:36,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-15 00:37:36,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 79. [2020-09-15 00:37:36,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-15 00:37:36,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 124 transitions. [2020-09-15 00:37:36,147 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 124 transitions. Word has length 15 [2020-09-15 00:37:36,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:37:36,147 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 124 transitions. [2020-09-15 00:37:36,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-15 00:37:36,148 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 124 transitions. [2020-09-15 00:37:36,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 00:37:36,149 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:36,149 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:36,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:37:36,362 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:36,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:36,363 INFO L82 PathProgramCache]: Analyzing trace with hash 485096059, now seen corresponding path program 3 times [2020-09-15 00:37:36,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:36,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899360186] [2020-09-15 00:37:36,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-15 00:37:36,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899360186] [2020-09-15 00:37:36,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123938641] [2020-09-15 00:37:36,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:37:36,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 00:37:36,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:37:36,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-15 00:37:36,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:37:36,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-15 00:37:36,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:37:36,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-09-15 00:37:36,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376710195] [2020-09-15 00:37:36,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 00:37:36,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:36,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 00:37:36,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-15 00:37:36,614 INFO L87 Difference]: Start difference. First operand 79 states and 124 transitions. Second operand 8 states. [2020-09-15 00:37:36,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:37:36,898 INFO L93 Difference]: Finished difference Result 160 states and 236 transitions. [2020-09-15 00:37:36,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 00:37:36,899 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-09-15 00:37:36,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:37:36,900 INFO L225 Difference]: With dead ends: 160 [2020-09-15 00:37:36,903 INFO L226 Difference]: Without dead ends: 160 [2020-09-15 00:37:36,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2020-09-15 00:37:36,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-15 00:37:36,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 130. [2020-09-15 00:37:36,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-15 00:37:36,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 196 transitions. [2020-09-15 00:37:36,929 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 196 transitions. Word has length 22 [2020-09-15 00:37:36,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:37:36,930 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 196 transitions. [2020-09-15 00:37:36,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 00:37:36,932 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 196 transitions. [2020-09-15 00:37:36,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 00:37:36,936 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:36,936 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:37,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:37:37,139 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:37,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:37,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1548321815, now seen corresponding path program 4 times [2020-09-15 00:37:37,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:37,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638505082] [2020-09-15 00:37:37,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:37,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:37,251 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-15 00:37:37,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638505082] [2020-09-15 00:37:37,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533980314] [2020-09-15 00:37:37,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:37:37,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 00:37:37,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:37:37,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2020-09-15 00:37:37,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:37:37,369 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-15 00:37:37,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:37:37,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-15 00:37:37,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318959445] [2020-09-15 00:37:37,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-15 00:37:37,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:37,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-15 00:37:37,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-09-15 00:37:37,371 INFO L87 Difference]: Start difference. First operand 130 states and 196 transitions. Second operand 7 states. [2020-09-15 00:37:37,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:37:37,400 INFO L93 Difference]: Finished difference Result 178 states and 262 transitions. [2020-09-15 00:37:37,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-15 00:37:37,400 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-09-15 00:37:37,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:37:37,402 INFO L225 Difference]: With dead ends: 178 [2020-09-15 00:37:37,402 INFO L226 Difference]: Without dead ends: 178 [2020-09-15 00:37:37,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-09-15 00:37:37,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-09-15 00:37:37,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 160. [2020-09-15 00:37:37,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-15 00:37:37,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 238 transitions. [2020-09-15 00:37:37,414 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 238 transitions. Word has length 29 [2020-09-15 00:37:37,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:37:37,415 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 238 transitions. [2020-09-15 00:37:37,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-15 00:37:37,415 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 238 transitions. [2020-09-15 00:37:37,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 00:37:37,417 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:37,417 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:37,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:37:37,631 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:37,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:37,631 INFO L82 PathProgramCache]: Analyzing trace with hash -2012714619, now seen corresponding path program 5 times [2020-09-15 00:37:37,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:37,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000881864] [2020-09-15 00:37:37,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:37,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:37,741 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-15 00:37:37,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000881864] [2020-09-15 00:37:37,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289797567] [2020-09-15 00:37:37,742 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:37:37,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-15 00:37:37,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:37:37,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-15 00:37:37,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:37:37,853 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-15 00:37:37,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:37:37,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-15 00:37:37,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523575088] [2020-09-15 00:37:37,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 00:37:37,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:37,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 00:37:37,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-09-15 00:37:37,856 INFO L87 Difference]: Start difference. First operand 160 states and 238 transitions. Second operand 8 states. [2020-09-15 00:37:37,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:37:37,900 INFO L93 Difference]: Finished difference Result 208 states and 304 transitions. [2020-09-15 00:37:37,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-15 00:37:37,900 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-09-15 00:37:37,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:37:37,902 INFO L225 Difference]: With dead ends: 208 [2020-09-15 00:37:37,902 INFO L226 Difference]: Without dead ends: 208 [2020-09-15 00:37:37,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-09-15 00:37:37,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-15 00:37:37,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 190. [2020-09-15 00:37:37,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-09-15 00:37:37,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 280 transitions. [2020-09-15 00:37:37,913 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 280 transitions. Word has length 33 [2020-09-15 00:37:37,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:37:37,914 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 280 transitions. [2020-09-15 00:37:37,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 00:37:37,914 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 280 transitions. [2020-09-15 00:37:37,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-15 00:37:37,915 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:37,916 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:38,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:37:38,131 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:38,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:38,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1171974131, now seen corresponding path program 6 times [2020-09-15 00:37:38,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:38,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564178507] [2020-09-15 00:37:38,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:38,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:38,248 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-15 00:37:38,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564178507] [2020-09-15 00:37:38,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821179627] [2020-09-15 00:37:38,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:37:38,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-15 00:37:38,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:37:38,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2020-09-15 00:37:38,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:37:38,438 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-09-15 00:37:38,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:37:38,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-09-15 00:37:38,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040661927] [2020-09-15 00:37:38,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 00:37:38,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:38,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 00:37:38,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-09-15 00:37:38,441 INFO L87 Difference]: Start difference. First operand 190 states and 280 transitions. Second operand 12 states. [2020-09-15 00:37:39,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:37:39,092 INFO L93 Difference]: Finished difference Result 304 states and 429 transitions. [2020-09-15 00:37:39,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 00:37:39,093 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-09-15 00:37:39,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:37:39,096 INFO L225 Difference]: With dead ends: 304 [2020-09-15 00:37:39,096 INFO L226 Difference]: Without dead ends: 304 [2020-09-15 00:37:39,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=420, Invalid=840, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 00:37:39,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-09-15 00:37:39,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 265. [2020-09-15 00:37:39,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-09-15 00:37:39,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 380 transitions. [2020-09-15 00:37:39,108 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 380 transitions. Word has length 37 [2020-09-15 00:37:39,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:37:39,108 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 380 transitions. [2020-09-15 00:37:39,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 00:37:39,108 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 380 transitions. [2020-09-15 00:37:39,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-15 00:37:39,110 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:39,110 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:39,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:37:39,324 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:39,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:39,324 INFO L82 PathProgramCache]: Analyzing trace with hash -870694653, now seen corresponding path program 7 times [2020-09-15 00:37:39,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:39,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607008941] [2020-09-15 00:37:39,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:39,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:39,450 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-15 00:37:39,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607008941] [2020-09-15 00:37:39,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301117644] [2020-09-15 00:37:39,451 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:37:39,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:39,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 00:37:39,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:37:39,560 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-15 00:37:39,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:37:39,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-15 00:37:39,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999468013] [2020-09-15 00:37:39,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 00:37:39,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:39,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 00:37:39,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-09-15 00:37:39,563 INFO L87 Difference]: Start difference. First operand 265 states and 380 transitions. Second operand 10 states. [2020-09-15 00:37:39,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:37:39,615 INFO L93 Difference]: Finished difference Result 322 states and 456 transitions. [2020-09-15 00:37:39,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-15 00:37:39,615 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-09-15 00:37:39,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:37:39,617 INFO L225 Difference]: With dead ends: 322 [2020-09-15 00:37:39,617 INFO L226 Difference]: Without dead ends: 322 [2020-09-15 00:37:39,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-09-15 00:37:39,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-09-15 00:37:39,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 301. [2020-09-15 00:37:39,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-09-15 00:37:39,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 429 transitions. [2020-09-15 00:37:39,627 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 429 transitions. Word has length 44 [2020-09-15 00:37:39,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:37:39,627 INFO L479 AbstractCegarLoop]: Abstraction has 301 states and 429 transitions. [2020-09-15 00:37:39,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 00:37:39,628 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 429 transitions. [2020-09-15 00:37:39,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-15 00:37:39,630 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:39,630 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:39,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:37:39,844 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:39,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:39,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1422004693, now seen corresponding path program 8 times [2020-09-15 00:37:39,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:39,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397647520] [2020-09-15 00:37:39,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:39,996 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 10 proven. 91 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-15 00:37:39,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397647520] [2020-09-15 00:37:39,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746699280] [2020-09-15 00:37:39,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:37:40,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 00:37:40,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:37:40,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 00:37:40,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:37:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 10 proven. 91 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-15 00:37:40,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:37:40,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-15 00:37:40,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083696139] [2020-09-15 00:37:40,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 00:37:40,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:40,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 00:37:40,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-15 00:37:40,157 INFO L87 Difference]: Start difference. First operand 301 states and 429 transitions. Second operand 11 states. [2020-09-15 00:37:40,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:37:40,213 INFO L93 Difference]: Finished difference Result 358 states and 505 transitions. [2020-09-15 00:37:40,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 00:37:40,214 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-09-15 00:37:40,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:37:40,216 INFO L225 Difference]: With dead ends: 358 [2020-09-15 00:37:40,216 INFO L226 Difference]: Without dead ends: 358 [2020-09-15 00:37:40,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-15 00:37:40,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-09-15 00:37:40,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 337. [2020-09-15 00:37:40,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-09-15 00:37:40,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 478 transitions. [2020-09-15 00:37:40,225 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 478 transitions. Word has length 48 [2020-09-15 00:37:40,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:37:40,225 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 478 transitions. [2020-09-15 00:37:40,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 00:37:40,226 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 478 transitions. [2020-09-15 00:37:40,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-15 00:37:40,227 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:40,227 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:40,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-15 00:37:40,442 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:40,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:40,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1332663897, now seen corresponding path program 9 times [2020-09-15 00:37:40,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:40,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027598902] [2020-09-15 00:37:40,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:40,642 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 10 proven. 120 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-15 00:37:40,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027598902] [2020-09-15 00:37:40,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701088510] [2020-09-15 00:37:40,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:37:40,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-15 00:37:40,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:37:40,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-15 00:37:40,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:37:40,838 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-09-15 00:37:40,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:37:40,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2020-09-15 00:37:40,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724049905] [2020-09-15 00:37:40,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 00:37:40,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:40,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 00:37:40,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-09-15 00:37:40,840 INFO L87 Difference]: Start difference. First operand 337 states and 478 transitions. Second operand 16 states. [2020-09-15 00:37:42,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:37:42,214 INFO L93 Difference]: Finished difference Result 484 states and 664 transitions. [2020-09-15 00:37:42,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-09-15 00:37:42,215 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-09-15 00:37:42,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:37:42,218 INFO L225 Difference]: With dead ends: 484 [2020-09-15 00:37:42,219 INFO L226 Difference]: Without dead ends: 484 [2020-09-15 00:37:42,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1155, Invalid=2505, Unknown=0, NotChecked=0, Total=3660 [2020-09-15 00:37:42,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-09-15 00:37:42,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 436. [2020-09-15 00:37:42,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2020-09-15 00:37:42,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 606 transitions. [2020-09-15 00:37:42,232 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 606 transitions. Word has length 52 [2020-09-15 00:37:42,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:37:42,233 INFO L479 AbstractCegarLoop]: Abstraction has 436 states and 606 transitions. [2020-09-15 00:37:42,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 00:37:42,233 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 606 transitions. [2020-09-15 00:37:42,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-15 00:37:42,234 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:42,235 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:42,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-09-15 00:37:42,450 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:42,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:42,451 INFO L82 PathProgramCache]: Analyzing trace with hash 298647787, now seen corresponding path program 10 times [2020-09-15 00:37:42,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:42,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932677754] [2020-09-15 00:37:42,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:42,638 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 13 proven. 153 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-15 00:37:42,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932677754] [2020-09-15 00:37:42,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091321939] [2020-09-15 00:37:42,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:37:42,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 00:37:42,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:37:42,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 00:37:42,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:37:42,802 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 13 proven. 153 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-15 00:37:42,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:37:42,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-15 00:37:42,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634096947] [2020-09-15 00:37:42,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 00:37:42,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:42,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 00:37:42,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-09-15 00:37:42,805 INFO L87 Difference]: Start difference. First operand 436 states and 606 transitions. Second operand 13 states. [2020-09-15 00:37:42,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:37:42,861 INFO L93 Difference]: Finished difference Result 502 states and 692 transitions. [2020-09-15 00:37:42,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 00:37:42,862 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 59 [2020-09-15 00:37:42,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:37:42,865 INFO L225 Difference]: With dead ends: 502 [2020-09-15 00:37:42,865 INFO L226 Difference]: Without dead ends: 502 [2020-09-15 00:37:42,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-09-15 00:37:42,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-09-15 00:37:42,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 478. [2020-09-15 00:37:42,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 478 states. [2020-09-15 00:37:42,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 662 transitions. [2020-09-15 00:37:42,880 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 662 transitions. Word has length 59 [2020-09-15 00:37:42,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:37:42,882 INFO L479 AbstractCegarLoop]: Abstraction has 478 states and 662 transitions. [2020-09-15 00:37:42,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 00:37:42,882 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 662 transitions. [2020-09-15 00:37:42,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-15 00:37:42,885 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:42,885 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:43,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:37:43,099 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:43,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:43,100 INFO L82 PathProgramCache]: Analyzing trace with hash -734842407, now seen corresponding path program 11 times [2020-09-15 00:37:43,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:43,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073665890] [2020-09-15 00:37:43,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:43,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:43,292 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 13 proven. 190 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-15 00:37:43,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073665890] [2020-09-15 00:37:43,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359422241] [2020-09-15 00:37:43,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:37:43,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-15 00:37:43,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:37:43,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 00:37:43,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:37:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 13 proven. 190 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-15 00:37:43,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:37:43,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-15 00:37:43,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596438600] [2020-09-15 00:37:43,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 00:37:43,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:43,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 00:37:43,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-09-15 00:37:43,439 INFO L87 Difference]: Start difference. First operand 478 states and 662 transitions. Second operand 14 states. [2020-09-15 00:37:43,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:37:43,502 INFO L93 Difference]: Finished difference Result 544 states and 748 transitions. [2020-09-15 00:37:43,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 00:37:43,503 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-09-15 00:37:43,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:37:43,505 INFO L225 Difference]: With dead ends: 544 [2020-09-15 00:37:43,506 INFO L226 Difference]: Without dead ends: 544 [2020-09-15 00:37:43,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-09-15 00:37:43,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2020-09-15 00:37:43,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 520. [2020-09-15 00:37:43,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-09-15 00:37:43,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 718 transitions. [2020-09-15 00:37:43,544 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 718 transitions. Word has length 63 [2020-09-15 00:37:43,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:37:43,544 INFO L479 AbstractCegarLoop]: Abstraction has 520 states and 718 transitions. [2020-09-15 00:37:43,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 00:37:43,545 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 718 transitions. [2020-09-15 00:37:43,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-15 00:37:43,546 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:43,547 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:43,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:37:43,751 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:43,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:43,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1524941881, now seen corresponding path program 12 times [2020-09-15 00:37:43,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:43,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256292155] [2020-09-15 00:37:43,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:43,983 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 13 proven. 231 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-15 00:37:43,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256292155] [2020-09-15 00:37:43,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447501001] [2020-09-15 00:37:43,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:37:44,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-15 00:37:44,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:37:44,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 00:37:44,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:37:44,263 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-09-15 00:37:44,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:37:44,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 20 [2020-09-15 00:37:44,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284401761] [2020-09-15 00:37:44,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 00:37:44,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:44,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 00:37:44,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2020-09-15 00:37:44,265 INFO L87 Difference]: Start difference. First operand 520 states and 718 transitions. Second operand 20 states. [2020-09-15 00:37:46,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:37:46,768 INFO L93 Difference]: Finished difference Result 700 states and 941 transitions. [2020-09-15 00:37:46,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-09-15 00:37:46,768 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 67 [2020-09-15 00:37:46,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:37:46,772 INFO L225 Difference]: With dead ends: 700 [2020-09-15 00:37:46,772 INFO L226 Difference]: Without dead ends: 700 [2020-09-15 00:37:46,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2622 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2548, Invalid=5824, Unknown=0, NotChecked=0, Total=8372 [2020-09-15 00:37:46,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2020-09-15 00:37:46,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 643. [2020-09-15 00:37:46,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-09-15 00:37:46,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 874 transitions. [2020-09-15 00:37:46,791 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 874 transitions. Word has length 67 [2020-09-15 00:37:46,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:37:46,791 INFO L479 AbstractCegarLoop]: Abstraction has 643 states and 874 transitions. [2020-09-15 00:37:46,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 00:37:46,792 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 874 transitions. [2020-09-15 00:37:46,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-09-15 00:37:46,794 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:46,794 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:47,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-15 00:37:47,009 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:47,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:47,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1171001041, now seen corresponding path program 13 times [2020-09-15 00:37:47,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:47,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196242844] [2020-09-15 00:37:47,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:47,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:47,257 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 16 proven. 276 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-09-15 00:37:47,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196242844] [2020-09-15 00:37:47,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986189861] [2020-09-15 00:37:47,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:37:47,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:47,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 00:37:47,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:37:47,411 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 16 proven. 276 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-09-15 00:37:47,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:37:47,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-15 00:37:47,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624947390] [2020-09-15 00:37:47,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 00:37:47,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:47,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 00:37:47,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-09-15 00:37:47,414 INFO L87 Difference]: Start difference. First operand 643 states and 874 transitions. Second operand 16 states. [2020-09-15 00:37:47,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:37:47,483 INFO L93 Difference]: Finished difference Result 718 states and 970 transitions. [2020-09-15 00:37:47,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 00:37:47,484 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 74 [2020-09-15 00:37:47,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:37:47,487 INFO L225 Difference]: With dead ends: 718 [2020-09-15 00:37:47,488 INFO L226 Difference]: Without dead ends: 718 [2020-09-15 00:37:47,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-09-15 00:37:47,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2020-09-15 00:37:47,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 691. [2020-09-15 00:37:47,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2020-09-15 00:37:47,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 937 transitions. [2020-09-15 00:37:47,505 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 937 transitions. Word has length 74 [2020-09-15 00:37:47,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:37:47,506 INFO L479 AbstractCegarLoop]: Abstraction has 691 states and 937 transitions. [2020-09-15 00:37:47,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 00:37:47,506 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 937 transitions. [2020-09-15 00:37:47,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-15 00:37:47,509 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:47,509 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:47,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-15 00:37:47,722 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:47,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:47,723 INFO L82 PathProgramCache]: Analyzing trace with hash 776210049, now seen corresponding path program 14 times [2020-09-15 00:37:47,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:47,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734703221] [2020-09-15 00:37:47,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:47,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:48,017 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 16 proven. 325 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-09-15 00:37:48,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734703221] [2020-09-15 00:37:48,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266544959] [2020-09-15 00:37:48,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:37:48,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 00:37:48,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:37:48,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 00:37:48,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:37:48,157 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 16 proven. 325 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-09-15 00:37:48,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:37:48,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-15 00:37:48,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125046342] [2020-09-15 00:37:48,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 00:37:48,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:48,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 00:37:48,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-15 00:37:48,159 INFO L87 Difference]: Start difference. First operand 691 states and 937 transitions. Second operand 17 states. [2020-09-15 00:37:48,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:37:48,253 INFO L93 Difference]: Finished difference Result 766 states and 1033 transitions. [2020-09-15 00:37:48,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 00:37:48,254 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 78 [2020-09-15 00:37:48,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:37:48,258 INFO L225 Difference]: With dead ends: 766 [2020-09-15 00:37:48,258 INFO L226 Difference]: Without dead ends: 766 [2020-09-15 00:37:48,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-15 00:37:48,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2020-09-15 00:37:48,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 739. [2020-09-15 00:37:48,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 739 states. [2020-09-15 00:37:48,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1000 transitions. [2020-09-15 00:37:48,274 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1000 transitions. Word has length 78 [2020-09-15 00:37:48,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:37:48,274 INFO L479 AbstractCegarLoop]: Abstraction has 739 states and 1000 transitions. [2020-09-15 00:37:48,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 00:37:48,274 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1000 transitions. [2020-09-15 00:37:48,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-09-15 00:37:48,277 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:48,277 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:48,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-15 00:37:48,490 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:48,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:48,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1187324627, now seen corresponding path program 15 times [2020-09-15 00:37:48,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:48,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570315187] [2020-09-15 00:37:48,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:48,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:48,792 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 16 proven. 378 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-09-15 00:37:48,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570315187] [2020-09-15 00:37:48,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923433710] [2020-09-15 00:37:48,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:37:48,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-15 00:37:48,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:37:48,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 00:37:48,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:37:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-09-15 00:37:49,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:37:49,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 24 [2020-09-15 00:37:49,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263938953] [2020-09-15 00:37:49,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 00:37:49,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:49,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 00:37:49,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2020-09-15 00:37:49,063 INFO L87 Difference]: Start difference. First operand 739 states and 1000 transitions. Second operand 24 states. [2020-09-15 00:37:53,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:37:53,584 INFO L93 Difference]: Finished difference Result 952 states and 1260 transitions. [2020-09-15 00:37:53,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2020-09-15 00:37:53,584 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 82 [2020-09-15 00:37:53,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:37:53,589 INFO L225 Difference]: With dead ends: 952 [2020-09-15 00:37:53,589 INFO L226 Difference]: Without dead ends: 952 [2020-09-15 00:37:53,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5558 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4896, Invalid=11616, Unknown=0, NotChecked=0, Total=16512 [2020-09-15 00:37:53,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2020-09-15 00:37:53,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 886. [2020-09-15 00:37:53,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 886 states. [2020-09-15 00:37:53,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1184 transitions. [2020-09-15 00:37:53,611 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1184 transitions. Word has length 82 [2020-09-15 00:37:53,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:37:53,611 INFO L479 AbstractCegarLoop]: Abstraction has 886 states and 1184 transitions. [2020-09-15 00:37:53,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 00:37:53,612 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1184 transitions. [2020-09-15 00:37:53,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-15 00:37:53,614 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:53,615 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:53,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:37:53,830 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:53,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:53,830 INFO L82 PathProgramCache]: Analyzing trace with hash -933866561, now seen corresponding path program 16 times [2020-09-15 00:37:53,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:53,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446352676] [2020-09-15 00:37:53,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:53,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:54,208 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 19 proven. 435 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-09-15 00:37:54,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446352676] [2020-09-15 00:37:54,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465815381] [2020-09-15 00:37:54,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:37:54,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 00:37:54,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:37:54,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 00:37:54,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:37:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 19 proven. 435 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-09-15 00:37:54,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:37:54,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-15 00:37:54,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429482082] [2020-09-15 00:37:54,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 00:37:54,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:54,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 00:37:54,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-09-15 00:37:54,745 INFO L87 Difference]: Start difference. First operand 886 states and 1184 transitions. Second operand 19 states. [2020-09-15 00:37:54,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:37:54,868 INFO L93 Difference]: Finished difference Result 970 states and 1290 transitions. [2020-09-15 00:37:54,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 00:37:54,869 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 89 [2020-09-15 00:37:54,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:37:54,875 INFO L225 Difference]: With dead ends: 970 [2020-09-15 00:37:54,875 INFO L226 Difference]: Without dead ends: 970 [2020-09-15 00:37:54,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-09-15 00:37:54,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-09-15 00:37:54,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 940. [2020-09-15 00:37:54,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 940 states. [2020-09-15 00:37:54,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1254 transitions. [2020-09-15 00:37:54,901 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1254 transitions. Word has length 89 [2020-09-15 00:37:54,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:37:54,902 INFO L479 AbstractCegarLoop]: Abstraction has 940 states and 1254 transitions. [2020-09-15 00:37:54,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 00:37:54,902 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1254 transitions. [2020-09-15 00:37:54,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-09-15 00:37:54,907 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:54,907 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:55,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-15 00:37:55,122 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:55,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:55,123 INFO L82 PathProgramCache]: Analyzing trace with hash -365776851, now seen corresponding path program 17 times [2020-09-15 00:37:55,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:55,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020314847] [2020-09-15 00:37:55,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:55,524 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 19 proven. 496 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-09-15 00:37:55,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020314847] [2020-09-15 00:37:55,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017952386] [2020-09-15 00:37:55,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:37:55,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-09-15 00:37:55,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:37:55,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 00:37:55,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:37:55,747 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 19 proven. 496 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-09-15 00:37:55,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:37:55,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 00:37:55,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588109840] [2020-09-15 00:37:55,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 00:37:55,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:55,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 00:37:55,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-15 00:37:55,751 INFO L87 Difference]: Start difference. First operand 940 states and 1254 transitions. Second operand 20 states. [2020-09-15 00:37:55,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:37:55,850 INFO L93 Difference]: Finished difference Result 1024 states and 1360 transitions. [2020-09-15 00:37:55,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 00:37:55,851 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 93 [2020-09-15 00:37:55,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:37:55,855 INFO L225 Difference]: With dead ends: 1024 [2020-09-15 00:37:55,855 INFO L226 Difference]: Without dead ends: 1024 [2020-09-15 00:37:55,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-15 00:37:55,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2020-09-15 00:37:55,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 994. [2020-09-15 00:37:55,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 994 states. [2020-09-15 00:37:55,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1324 transitions. [2020-09-15 00:37:55,872 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1324 transitions. Word has length 93 [2020-09-15 00:37:55,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:37:55,872 INFO L479 AbstractCegarLoop]: Abstraction has 994 states and 1324 transitions. [2020-09-15 00:37:55,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 00:37:55,873 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1324 transitions. [2020-09-15 00:37:55,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-15 00:37:55,875 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:55,875 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:56,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:37:56,089 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:56,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:56,090 INFO L82 PathProgramCache]: Analyzing trace with hash -728816229, now seen corresponding path program 18 times [2020-09-15 00:37:56,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:56,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420532788] [2020-09-15 00:37:56,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:56,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:56,472 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 19 proven. 561 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-09-15 00:37:56,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420532788] [2020-09-15 00:37:56,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579738812] [2020-09-15 00:37:56,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:37:56,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-09-15 00:37:56,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:37:56,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 00:37:56,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:37:56,922 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2020-09-15 00:37:56,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:37:56,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10] total 28 [2020-09-15 00:37:56,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543564019] [2020-09-15 00:37:56,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 00:37:56,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:56,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 00:37:56,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-09-15 00:37:56,925 INFO L87 Difference]: Start difference. First operand 994 states and 1324 transitions. Second operand 28 states. [2020-09-15 00:38:04,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:38:04,575 INFO L93 Difference]: Finished difference Result 1240 states and 1621 transitions. [2020-09-15 00:38:04,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2020-09-15 00:38:04,576 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 97 [2020-09-15 00:38:04,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:38:04,580 INFO L225 Difference]: With dead ends: 1240 [2020-09-15 00:38:04,580 INFO L226 Difference]: Without dead ends: 1240 [2020-09-15 00:38:04,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10432 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=8550, Invalid=20862, Unknown=0, NotChecked=0, Total=29412 [2020-09-15 00:38:04,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2020-09-15 00:38:04,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1165. [2020-09-15 00:38:04,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1165 states. [2020-09-15 00:38:04,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 1536 transitions. [2020-09-15 00:38:04,606 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 1536 transitions. Word has length 97 [2020-09-15 00:38:04,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:38:04,606 INFO L479 AbstractCegarLoop]: Abstraction has 1165 states and 1536 transitions. [2020-09-15 00:38:04,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 00:38:04,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 1536 transitions. [2020-09-15 00:38:04,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-09-15 00:38:04,609 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:38:04,610 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:38:04,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:38:04,824 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:38:04,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:38:04,824 INFO L82 PathProgramCache]: Analyzing trace with hash 110062427, now seen corresponding path program 19 times [2020-09-15 00:38:04,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:38:04,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072561421] [2020-09-15 00:38:04,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:38:04,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:38:05,318 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 22 proven. 630 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-09-15 00:38:05,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072561421] [2020-09-15 00:38:05,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457988702] [2020-09-15 00:38:05,319 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:38:05,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:38:05,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 00:38:05,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:38:05,466 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 22 proven. 630 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-09-15 00:38:05,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:38:05,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 00:38:05,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623765501] [2020-09-15 00:38:05,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 00:38:05,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:38:05,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 00:38:05,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-09-15 00:38:05,472 INFO L87 Difference]: Start difference. First operand 1165 states and 1536 transitions. Second operand 22 states. [2020-09-15 00:38:05,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:38:05,600 INFO L93 Difference]: Finished difference Result 1258 states and 1652 transitions. [2020-09-15 00:38:05,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 00:38:05,601 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 104 [2020-09-15 00:38:05,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:38:05,608 INFO L225 Difference]: With dead ends: 1258 [2020-09-15 00:38:05,609 INFO L226 Difference]: Without dead ends: 1258 [2020-09-15 00:38:05,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-09-15 00:38:05,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2020-09-15 00:38:05,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1225. [2020-09-15 00:38:05,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1225 states. [2020-09-15 00:38:05,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 1613 transitions. [2020-09-15 00:38:05,632 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 1613 transitions. Word has length 104 [2020-09-15 00:38:05,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:38:05,632 INFO L479 AbstractCegarLoop]: Abstraction has 1225 states and 1613 transitions. [2020-09-15 00:38:05,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 00:38:05,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 1613 transitions. [2020-09-15 00:38:05,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-09-15 00:38:05,636 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:38:05,636 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:38:05,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-15 00:38:05,849 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:38:05,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:38:05,850 INFO L82 PathProgramCache]: Analyzing trace with hash -912464595, now seen corresponding path program 20 times [2020-09-15 00:38:05,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:38:05,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151379416] [2020-09-15 00:38:05,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:38:05,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:38:06,321 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 22 proven. 703 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-09-15 00:38:06,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151379416] [2020-09-15 00:38:06,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865729022] [2020-09-15 00:38:06,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:38:06,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 00:38:06,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:38:06,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 00:38:06,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:38:06,515 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 22 proven. 703 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-09-15 00:38:06,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:38:06,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 00:38:06,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636020881] [2020-09-15 00:38:06,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 00:38:06,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:38:06,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 00:38:06,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-15 00:38:06,517 INFO L87 Difference]: Start difference. First operand 1225 states and 1613 transitions. Second operand 23 states. [2020-09-15 00:38:06,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:38:06,618 INFO L93 Difference]: Finished difference Result 1285 states and 1690 transitions. [2020-09-15 00:38:06,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 00:38:06,619 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 108 [2020-09-15 00:38:06,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:38:06,624 INFO L225 Difference]: With dead ends: 1285 [2020-09-15 00:38:06,624 INFO L226 Difference]: Without dead ends: 1285 [2020-09-15 00:38:06,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-15 00:38:06,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2020-09-15 00:38:06,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1285. [2020-09-15 00:38:06,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1285 states. [2020-09-15 00:38:06,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 1690 transitions. [2020-09-15 00:38:06,643 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 1690 transitions. Word has length 108 [2020-09-15 00:38:06,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:38:06,644 INFO L479 AbstractCegarLoop]: Abstraction has 1285 states and 1690 transitions. [2020-09-15 00:38:06,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 00:38:06,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 1690 transitions. [2020-09-15 00:38:06,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-09-15 00:38:06,647 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:38:06,648 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:38:06,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:38:06,862 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:38:06,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:38:06,863 INFO L82 PathProgramCache]: Analyzing trace with hash -220912129, now seen corresponding path program 21 times [2020-09-15 00:38:06,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:38:06,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544209813] [2020-09-15 00:38:06,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:38:06,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:38:07,160 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 00:38:07,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544209813] [2020-09-15 00:38:07,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293523745] [2020-09-15 00:38:07,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:38:07,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-15 00:38:07,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:38:07,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 00:38:07,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:38:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 00:38:07,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:38:07,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-15 00:38:07,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9568669] [2020-09-15 00:38:07,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 00:38:07,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:38:07,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 00:38:07,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-09-15 00:38:07,398 INFO L87 Difference]: Start difference. First operand 1285 states and 1690 transitions. Second operand 12 states. [2020-09-15 00:38:07,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:38:07,460 INFO L93 Difference]: Finished difference Result 1460 states and 1896 transitions. [2020-09-15 00:38:07,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 00:38:07,461 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 112 [2020-09-15 00:38:07,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:38:07,465 INFO L225 Difference]: With dead ends: 1460 [2020-09-15 00:38:07,466 INFO L226 Difference]: Without dead ends: 1460 [2020-09-15 00:38:07,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-09-15 00:38:07,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2020-09-15 00:38:07,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1414. [2020-09-15 00:38:07,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1414 states. [2020-09-15 00:38:07,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 1846 transitions. [2020-09-15 00:38:07,490 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 1846 transitions. Word has length 112 [2020-09-15 00:38:07,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:38:07,491 INFO L479 AbstractCegarLoop]: Abstraction has 1414 states and 1846 transitions. [2020-09-15 00:38:07,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 00:38:07,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 1846 transitions. [2020-09-15 00:38:07,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-09-15 00:38:07,496 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:38:07,496 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:38:07,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-15 00:38:07,710 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:38:07,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:38:07,711 INFO L82 PathProgramCache]: Analyzing trace with hash 2018487717, now seen corresponding path program 22 times [2020-09-15 00:38:07,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:38:07,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089391803] [2020-09-15 00:38:07,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:38:07,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:38:08,017 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 00:38:08,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089391803] [2020-09-15 00:38:08,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464093343] [2020-09-15 00:38:08,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:38:08,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 00:38:08,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:38:08,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 00:38:08,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:38:08,769 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 00:38:08,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:38:08,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-15 00:38:08,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444374705] [2020-09-15 00:38:08,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 00:38:08,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:38:08,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 00:38:08,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-09-15 00:38:08,771 INFO L87 Difference]: Start difference. First operand 1414 states and 1846 transitions. Second operand 13 states. [2020-09-15 00:38:08,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:38:08,867 INFO L93 Difference]: Finished difference Result 1589 states and 2052 transitions. [2020-09-15 00:38:08,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 00:38:08,868 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 115 [2020-09-15 00:38:08,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:38:08,873 INFO L225 Difference]: With dead ends: 1589 [2020-09-15 00:38:08,873 INFO L226 Difference]: Without dead ends: 1589 [2020-09-15 00:38:08,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-09-15 00:38:08,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2020-09-15 00:38:08,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1543. [2020-09-15 00:38:08,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-09-15 00:38:08,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2002 transitions. [2020-09-15 00:38:08,894 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2002 transitions. Word has length 115 [2020-09-15 00:38:08,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:38:08,895 INFO L479 AbstractCegarLoop]: Abstraction has 1543 states and 2002 transitions. [2020-09-15 00:38:08,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 00:38:08,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2002 transitions. [2020-09-15 00:38:08,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-09-15 00:38:08,898 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:38:08,899 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:38:09,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-15 00:38:09,114 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:38:09,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:38:09,114 INFO L82 PathProgramCache]: Analyzing trace with hash -2042676161, now seen corresponding path program 23 times [2020-09-15 00:38:09,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:38:09,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056706281] [2020-09-15 00:38:09,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:38:09,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:38:09,411 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 00:38:09,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056706281] [2020-09-15 00:38:09,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142484671] [2020-09-15 00:38:09,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:38:09,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-09-15 00:38:09,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:38:09,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 00:38:09,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:38:09,703 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 00:38:09,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:38:09,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-15 00:38:09,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299629076] [2020-09-15 00:38:09,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 00:38:09,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:38:09,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 00:38:09,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-09-15 00:38:09,705 INFO L87 Difference]: Start difference. First operand 1543 states and 2002 transitions. Second operand 14 states. [2020-09-15 00:38:09,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:38:09,787 INFO L93 Difference]: Finished difference Result 1718 states and 2208 transitions. [2020-09-15 00:38:09,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 00:38:09,787 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 118 [2020-09-15 00:38:09,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:38:09,794 INFO L225 Difference]: With dead ends: 1718 [2020-09-15 00:38:09,794 INFO L226 Difference]: Without dead ends: 1718 [2020-09-15 00:38:09,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-09-15 00:38:09,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2020-09-15 00:38:09,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1672. [2020-09-15 00:38:09,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1672 states. [2020-09-15 00:38:09,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2158 transitions. [2020-09-15 00:38:09,820 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2158 transitions. Word has length 118 [2020-09-15 00:38:09,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:38:09,820 INFO L479 AbstractCegarLoop]: Abstraction has 1672 states and 2158 transitions. [2020-09-15 00:38:09,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 00:38:09,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2158 transitions. [2020-09-15 00:38:09,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-09-15 00:38:09,824 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:38:09,824 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:38:10,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:38:10,039 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:38:10,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:38:10,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1052962661, now seen corresponding path program 24 times [2020-09-15 00:38:10,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:38:10,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646536952] [2020-09-15 00:38:10,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:38:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:38:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 00:38:10,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646536952] [2020-09-15 00:38:10,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864984164] [2020-09-15 00:38:10,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:38:10,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-09-15 00:38:10,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:38:10,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 00:38:10,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:38:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 00:38:10,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:38:10,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-15 00:38:10,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202690102] [2020-09-15 00:38:10,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 00:38:10,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:38:10,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 00:38:10,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-09-15 00:38:10,802 INFO L87 Difference]: Start difference. First operand 1672 states and 2158 transitions. Second operand 15 states. [2020-09-15 00:38:10,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:38:10,925 INFO L93 Difference]: Finished difference Result 1847 states and 2364 transitions. [2020-09-15 00:38:10,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 00:38:10,925 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2020-09-15 00:38:10,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:38:10,932 INFO L225 Difference]: With dead ends: 1847 [2020-09-15 00:38:10,933 INFO L226 Difference]: Without dead ends: 1847 [2020-09-15 00:38:10,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-09-15 00:38:10,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2020-09-15 00:38:10,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1801. [2020-09-15 00:38:10,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1801 states. [2020-09-15 00:38:10,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2314 transitions. [2020-09-15 00:38:10,959 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2314 transitions. Word has length 121 [2020-09-15 00:38:10,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:38:10,960 INFO L479 AbstractCegarLoop]: Abstraction has 1801 states and 2314 transitions. [2020-09-15 00:38:10,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 00:38:10,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2314 transitions. [2020-09-15 00:38:10,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-09-15 00:38:10,964 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:38:10,964 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:38:11,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-15 00:38:11,178 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:38:11,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:38:11,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1691329151, now seen corresponding path program 25 times [2020-09-15 00:38:11,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:38:11,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890712279] [2020-09-15 00:38:11,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:38:11,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:38:11,522 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 00:38:11,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890712279] [2020-09-15 00:38:11,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022531583] [2020-09-15 00:38:11,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:38:11,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:38:11,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 00:38:11,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:38:11,705 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 00:38:11,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:38:11,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-15 00:38:11,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758783393] [2020-09-15 00:38:11,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 00:38:11,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:38:11,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 00:38:11,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-09-15 00:38:11,707 INFO L87 Difference]: Start difference. First operand 1801 states and 2314 transitions. Second operand 16 states. [2020-09-15 00:38:11,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:38:11,834 INFO L93 Difference]: Finished difference Result 1976 states and 2520 transitions. [2020-09-15 00:38:11,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 00:38:11,835 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 124 [2020-09-15 00:38:11,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:38:11,841 INFO L225 Difference]: With dead ends: 1976 [2020-09-15 00:38:11,841 INFO L226 Difference]: Without dead ends: 1976 [2020-09-15 00:38:11,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-09-15 00:38:11,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2020-09-15 00:38:11,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1930. [2020-09-15 00:38:11,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1930 states. [2020-09-15 00:38:11,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2470 transitions. [2020-09-15 00:38:11,865 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2470 transitions. Word has length 124 [2020-09-15 00:38:11,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:38:11,865 INFO L479 AbstractCegarLoop]: Abstraction has 1930 states and 2470 transitions. [2020-09-15 00:38:11,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 00:38:11,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2470 transitions. [2020-09-15 00:38:11,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-09-15 00:38:11,870 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:38:11,870 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:38:12,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:38:12,084 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:38:12,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:38:12,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1152246053, now seen corresponding path program 26 times [2020-09-15 00:38:12,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:38:12,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905807685] [2020-09-15 00:38:12,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:38:12,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:38:12,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 00:38:12,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905807685] [2020-09-15 00:38:12,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192646648] [2020-09-15 00:38:12,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:38:12,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 00:38:12,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:38:12,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 00:38:12,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:38:12,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 00:38:12,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:38:12,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-15 00:38:12,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791289385] [2020-09-15 00:38:12,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 00:38:12,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:38:12,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 00:38:12,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-15 00:38:12,640 INFO L87 Difference]: Start difference. First operand 1930 states and 2470 transitions. Second operand 17 states. [2020-09-15 00:38:12,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:38:12,726 INFO L93 Difference]: Finished difference Result 2105 states and 2676 transitions. [2020-09-15 00:38:12,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 00:38:12,727 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 127 [2020-09-15 00:38:12,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:38:12,736 INFO L225 Difference]: With dead ends: 2105 [2020-09-15 00:38:12,736 INFO L226 Difference]: Without dead ends: 2105 [2020-09-15 00:38:12,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-15 00:38:12,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2020-09-15 00:38:12,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 2059. [2020-09-15 00:38:12,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2059 states. [2020-09-15 00:38:12,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 2626 transitions. [2020-09-15 00:38:12,766 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 2626 transitions. Word has length 127 [2020-09-15 00:38:12,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:38:12,766 INFO L479 AbstractCegarLoop]: Abstraction has 2059 states and 2626 transitions. [2020-09-15 00:38:12,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 00:38:12,766 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 2626 transitions. [2020-09-15 00:38:12,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-09-15 00:38:12,771 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:38:12,771 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:38:12,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-15 00:38:12,986 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:38:12,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:38:12,987 INFO L82 PathProgramCache]: Analyzing trace with hash 210393279, now seen corresponding path program 27 times [2020-09-15 00:38:12,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:38:12,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843133830] [2020-09-15 00:38:12,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:38:13,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:38:13,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 00:38:13,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843133830] [2020-09-15 00:38:13,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928230992] [2020-09-15 00:38:13,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:38:13,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-09-15 00:38:13,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:38:13,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 00:38:13,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:38:13,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 00:38:13,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:38:13,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-15 00:38:13,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101078267] [2020-09-15 00:38:13,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 00:38:13,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:38:13,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 00:38:13,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-15 00:38:13,775 INFO L87 Difference]: Start difference. First operand 2059 states and 2626 transitions. Second operand 18 states. [2020-09-15 00:38:13,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:38:13,856 INFO L93 Difference]: Finished difference Result 2234 states and 2832 transitions. [2020-09-15 00:38:13,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 00:38:13,857 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 130 [2020-09-15 00:38:13,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:38:13,866 INFO L225 Difference]: With dead ends: 2234 [2020-09-15 00:38:13,866 INFO L226 Difference]: Without dead ends: 2234 [2020-09-15 00:38:13,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-15 00:38:13,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2020-09-15 00:38:13,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2188. [2020-09-15 00:38:13,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2188 states. [2020-09-15 00:38:13,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 2782 transitions. [2020-09-15 00:38:13,899 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 2782 transitions. Word has length 130 [2020-09-15 00:38:13,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:38:13,900 INFO L479 AbstractCegarLoop]: Abstraction has 2188 states and 2782 transitions. [2020-09-15 00:38:13,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 00:38:13,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 2782 transitions. [2020-09-15 00:38:13,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-09-15 00:38:13,904 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:38:13,905 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:38:14,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-15 00:38:14,119 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:38:14,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:38:14,120 INFO L82 PathProgramCache]: Analyzing trace with hash 495747813, now seen corresponding path program 28 times [2020-09-15 00:38:14,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:38:14,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848678348] [2020-09-15 00:38:14,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:38:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:38:14,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 00:38:14,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848678348] [2020-09-15 00:38:14,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750868199] [2020-09-15 00:38:14,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:38:16,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 00:38:16,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:38:16,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 00:38:16,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:38:16,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 00:38:16,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:38:16,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-15 00:38:16,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671060884] [2020-09-15 00:38:16,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 00:38:16,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:38:16,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 00:38:16,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-09-15 00:38:16,259 INFO L87 Difference]: Start difference. First operand 2188 states and 2782 transitions. Second operand 19 states. [2020-09-15 00:38:16,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:38:16,361 INFO L93 Difference]: Finished difference Result 2363 states and 2988 transitions. [2020-09-15 00:38:16,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 00:38:16,362 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 133 [2020-09-15 00:38:16,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:38:16,371 INFO L225 Difference]: With dead ends: 2363 [2020-09-15 00:38:16,371 INFO L226 Difference]: Without dead ends: 2363 [2020-09-15 00:38:16,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-09-15 00:38:16,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2020-09-15 00:38:16,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 2317. [2020-09-15 00:38:16,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2317 states. [2020-09-15 00:38:16,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 2938 transitions. [2020-09-15 00:38:16,401 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 2938 transitions. Word has length 133 [2020-09-15 00:38:16,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:38:16,401 INFO L479 AbstractCegarLoop]: Abstraction has 2317 states and 2938 transitions. [2020-09-15 00:38:16,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 00:38:16,402 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 2938 transitions. [2020-09-15 00:38:16,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-15 00:38:16,406 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:38:16,406 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:38:16,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:38:16,620 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:38:16,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:38:16,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1752391423, now seen corresponding path program 29 times [2020-09-15 00:38:16,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:38:16,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995209328] [2020-09-15 00:38:16,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:38:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:38:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 00:38:17,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995209328] [2020-09-15 00:38:17,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27066841] [2020-09-15 00:38:17,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:38:17,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-09-15 00:38:17,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:38:17,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 00:38:17,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:38:17,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 00:38:17,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:38:17,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 00:38:17,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884987042] [2020-09-15 00:38:17,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 00:38:17,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:38:17,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 00:38:17,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-15 00:38:17,449 INFO L87 Difference]: Start difference. First operand 2317 states and 2938 transitions. Second operand 20 states. [2020-09-15 00:38:17,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:38:17,572 INFO L93 Difference]: Finished difference Result 2492 states and 3144 transitions. [2020-09-15 00:38:17,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 00:38:17,572 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 136 [2020-09-15 00:38:17,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:38:17,577 INFO L225 Difference]: With dead ends: 2492 [2020-09-15 00:38:17,578 INFO L226 Difference]: Without dead ends: 2492 [2020-09-15 00:38:17,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-15 00:38:17,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2020-09-15 00:38:17,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 2446. [2020-09-15 00:38:17,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2446 states. [2020-09-15 00:38:17,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2446 states to 2446 states and 3094 transitions. [2020-09-15 00:38:17,605 INFO L78 Accepts]: Start accepts. Automaton has 2446 states and 3094 transitions. Word has length 136 [2020-09-15 00:38:17,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:38:17,606 INFO L479 AbstractCegarLoop]: Abstraction has 2446 states and 3094 transitions. [2020-09-15 00:38:17,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 00:38:17,606 INFO L276 IsEmpty]: Start isEmpty. Operand 2446 states and 3094 transitions. [2020-09-15 00:38:17,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-15 00:38:17,610 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:38:17,610 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:38:17,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:38:17,824 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:38:17,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:38:17,825 INFO L82 PathProgramCache]: Analyzing trace with hash -807742299, now seen corresponding path program 30 times [2020-09-15 00:38:17,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:38:17,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553592997] [2020-09-15 00:38:17,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:38:17,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:38:18,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 00:38:18,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553592997] [2020-09-15 00:38:18,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729484318] [2020-09-15 00:38:18,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:38:18,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-09-15 00:38:18,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:38:18,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 00:38:18,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:38:18,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 00:38:18,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:38:18,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-15 00:38:18,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106835457] [2020-09-15 00:38:18,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 00:38:18,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:38:18,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 00:38:18,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-09-15 00:38:18,967 INFO L87 Difference]: Start difference. First operand 2446 states and 3094 transitions. Second operand 21 states. [2020-09-15 00:38:19,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:38:19,070 INFO L93 Difference]: Finished difference Result 2621 states and 3300 transitions. [2020-09-15 00:38:19,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 00:38:19,071 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 139 [2020-09-15 00:38:19,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:38:19,076 INFO L225 Difference]: With dead ends: 2621 [2020-09-15 00:38:19,076 INFO L226 Difference]: Without dead ends: 2621 [2020-09-15 00:38:19,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-09-15 00:38:19,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2621 states. [2020-09-15 00:38:19,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2621 to 2575. [2020-09-15 00:38:19,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2575 states. [2020-09-15 00:38:19,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 3250 transitions. [2020-09-15 00:38:19,118 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 3250 transitions. Word has length 139 [2020-09-15 00:38:19,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:38:19,119 INFO L479 AbstractCegarLoop]: Abstraction has 2575 states and 3250 transitions. [2020-09-15 00:38:19,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 00:38:19,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 3250 transitions. [2020-09-15 00:38:19,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-09-15 00:38:19,124 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:38:19,124 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:38:19,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-15 00:38:19,338 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:38:19,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:38:19,338 INFO L82 PathProgramCache]: Analyzing trace with hash 277787967, now seen corresponding path program 31 times [2020-09-15 00:38:19,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:38:19,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965970750] [2020-09-15 00:38:19,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:38:19,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:38:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 00:38:19,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965970750] [2020-09-15 00:38:19,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762221088] [2020-09-15 00:38:19,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:38:20,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:38:20,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 00:38:20,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:38:20,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 00:38:20,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:38:20,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 00:38:20,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021094142] [2020-09-15 00:38:20,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 00:38:20,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:38:20,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 00:38:20,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-09-15 00:38:20,097 INFO L87 Difference]: Start difference. First operand 2575 states and 3250 transitions. Second operand 22 states. [2020-09-15 00:38:20,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:38:20,235 INFO L93 Difference]: Finished difference Result 2750 states and 3456 transitions. [2020-09-15 00:38:20,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 00:38:20,236 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 142 [2020-09-15 00:38:20,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:38:20,244 INFO L225 Difference]: With dead ends: 2750 [2020-09-15 00:38:20,245 INFO L226 Difference]: Without dead ends: 2750 [2020-09-15 00:38:20,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-09-15 00:38:20,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2020-09-15 00:38:20,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 2704. [2020-09-15 00:38:20,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2704 states. [2020-09-15 00:38:20,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2704 states to 2704 states and 3406 transitions. [2020-09-15 00:38:20,279 INFO L78 Accepts]: Start accepts. Automaton has 2704 states and 3406 transitions. Word has length 142 [2020-09-15 00:38:20,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:38:20,280 INFO L479 AbstractCegarLoop]: Abstraction has 2704 states and 3406 transitions. [2020-09-15 00:38:20,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 00:38:20,280 INFO L276 IsEmpty]: Start isEmpty. Operand 2704 states and 3406 transitions. [2020-09-15 00:38:20,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-09-15 00:38:20,285 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:38:20,286 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:38:20,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:38:20,500 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:38:20,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:38:20,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1793796507, now seen corresponding path program 32 times [2020-09-15 00:38:20,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:38:20,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900326011] [2020-09-15 00:38:20,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:38:20,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:38:21,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 00:38:21,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900326011] [2020-09-15 00:38:21,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600312050] [2020-09-15 00:38:21,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:38:21,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 00:38:21,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:38:21,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 00:38:21,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:38:21,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 00:38:21,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:38:21,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 00:38:21,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401284339] [2020-09-15 00:38:21,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 00:38:21,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:38:21,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 00:38:21,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-15 00:38:21,416 INFO L87 Difference]: Start difference. First operand 2704 states and 3406 transitions. Second operand 23 states. [2020-09-15 00:38:21,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:38:21,561 INFO L93 Difference]: Finished difference Result 2833 states and 3562 transitions. [2020-09-15 00:38:21,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 00:38:21,562 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 145 [2020-09-15 00:38:21,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:38:21,568 INFO L225 Difference]: With dead ends: 2833 [2020-09-15 00:38:21,568 INFO L226 Difference]: Without dead ends: 2833 [2020-09-15 00:38:21,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-15 00:38:21,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2020-09-15 00:38:21,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 2833. [2020-09-15 00:38:21,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2833 states. [2020-09-15 00:38:21,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2833 states to 2833 states and 3562 transitions. [2020-09-15 00:38:21,613 INFO L78 Accepts]: Start accepts. Automaton has 2833 states and 3562 transitions. Word has length 145 [2020-09-15 00:38:21,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:38:21,613 INFO L479 AbstractCegarLoop]: Abstraction has 2833 states and 3562 transitions. [2020-09-15 00:38:21,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 00:38:21,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2833 states and 3562 transitions. [2020-09-15 00:38:21,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-15 00:38:21,621 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:38:21,621 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:38:21,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-15 00:38:21,835 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:38:21,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:38:21,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1981785217, now seen corresponding path program 33 times [2020-09-15 00:38:21,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:38:21,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192327979] [2020-09-15 00:38:21,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:38:21,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:38:25,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 00:38:25,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192327979] [2020-09-15 00:38:25,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413115484] [2020-09-15 00:38:25,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:38:26,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-09-15 00:38:26,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:38:26,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-15 00:38:26,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:38:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 00:38:26,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:38:26,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-15 00:38:26,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700628902] [2020-09-15 00:38:26,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-15 00:38:26,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:38:26,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-15 00:38:26,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-15 00:38:26,474 INFO L87 Difference]: Start difference. First operand 2833 states and 3562 transitions. Second operand 63 states. [2020-09-15 00:40:06,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:40:06,002 INFO L93 Difference]: Finished difference Result 32926 states and 45933 transitions. [2020-09-15 00:40:06,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 633 states. [2020-09-15 00:40:06,002 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-15 00:40:06,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:40:06,123 INFO L225 Difference]: With dead ends: 32926 [2020-09-15 00:40:06,123 INFO L226 Difference]: Without dead ends: 32924 [2020-09-15 00:40:06,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 632 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162735 ImplicationChecksByTransitivity, 38.6s TimeCoverageRelationStatistics Valid=2407, Invalid=398915, Unknown=0, NotChecked=0, Total=401322 [2020-09-15 00:40:06,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32924 states. [2020-09-15 00:40:06,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32924 to 2967. [2020-09-15 00:40:06,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2967 states. [2020-09-15 00:40:06,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2967 states to 2967 states and 3794 transitions. [2020-09-15 00:40:06,465 INFO L78 Accepts]: Start accepts. Automaton has 2967 states and 3794 transitions. Word has length 148 [2020-09-15 00:40:06,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:40:06,466 INFO L479 AbstractCegarLoop]: Abstraction has 2967 states and 3794 transitions. [2020-09-15 00:40:06,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-15 00:40:06,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2967 states and 3794 transitions. [2020-09-15 00:40:06,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-15 00:40:06,473 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:40:06,474 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:40:06,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-09-15 00:40:06,687 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:40:06,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:40:06,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1970430061, now seen corresponding path program 34 times [2020-09-15 00:40:06,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:40:06,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934583599] [2020-09-15 00:40:06,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:40:06,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:40:10,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 00:40:10,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934583599] [2020-09-15 00:40:10,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646165092] [2020-09-15 00:40:10,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:40:12,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 00:40:12,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:40:12,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-15 00:40:12,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:40:12,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 00:40:12,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:40:12,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-15 00:40:12,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66176266] [2020-09-15 00:40:12,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-15 00:40:12,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:40:12,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-15 00:40:12,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-15 00:40:12,646 INFO L87 Difference]: Start difference. First operand 2967 states and 3794 transitions. Second operand 63 states. [2020-09-15 00:40:43,332 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-09-15 00:41:26,654 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-09-15 00:41:56,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:41:56,059 INFO L93 Difference]: Finished difference Result 30945 states and 43173 transitions. [2020-09-15 00:41:56,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-09-15 00:41:56,060 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-15 00:41:56,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:41:56,106 INFO L225 Difference]: With dead ends: 30945 [2020-09-15 00:41:56,107 INFO L226 Difference]: Without dead ends: 30943 [2020-09-15 00:41:56,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 39.5s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-09-15 00:41:56,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30943 states. [2020-09-15 00:41:56,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30943 to 2973. [2020-09-15 00:41:56,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2973 states. [2020-09-15 00:41:56,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 3801 transitions. [2020-09-15 00:41:56,296 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 3801 transitions. Word has length 148 [2020-09-15 00:41:56,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:41:56,297 INFO L479 AbstractCegarLoop]: Abstraction has 2973 states and 3801 transitions. [2020-09-15 00:41:56,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-15 00:41:56,297 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 3801 transitions. [2020-09-15 00:41:56,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-15 00:41:56,302 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:41:56,302 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:41:56,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-15 00:41:56,517 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:41:56,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:41:56,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1092472257, now seen corresponding path program 35 times [2020-09-15 00:41:56,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:41:56,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15872982] [2020-09-15 00:41:56,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:41:56,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:42:00,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 00:42:00,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15872982] [2020-09-15 00:42:00,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256664974] [2020-09-15 00:42:00,810 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:42:01,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-09-15 00:42:01,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:42:01,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-15 00:42:01,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:42:01,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 00:42:01,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:42:01,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-15 00:42:01,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919788459] [2020-09-15 00:42:01,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-15 00:42:01,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:42:01,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-15 00:42:01,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-15 00:42:01,298 INFO L87 Difference]: Start difference. First operand 2973 states and 3801 transitions. Second operand 63 states. [2020-09-15 00:43:49,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:43:49,346 INFO L93 Difference]: Finished difference Result 30939 states and 43164 transitions. [2020-09-15 00:43:49,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-09-15 00:43:49,348 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-15 00:43:49,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:43:49,408 INFO L225 Difference]: With dead ends: 30939 [2020-09-15 00:43:49,409 INFO L226 Difference]: Without dead ends: 30937 [2020-09-15 00:43:49,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 41.9s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-09-15 00:43:49,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30937 states. [2020-09-15 00:43:49,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30937 to 2979. [2020-09-15 00:43:49,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2979 states. [2020-09-15 00:43:49,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2979 states to 2979 states and 3808 transitions. [2020-09-15 00:43:49,637 INFO L78 Accepts]: Start accepts. Automaton has 2979 states and 3808 transitions. Word has length 148 [2020-09-15 00:43:49,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:43:49,638 INFO L479 AbstractCegarLoop]: Abstraction has 2979 states and 3808 transitions. [2020-09-15 00:43:49,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-15 00:43:49,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2979 states and 3808 transitions. [2020-09-15 00:43:49,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-15 00:43:49,645 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:43:49,646 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:43:49,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-15 00:43:49,859 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:43:49,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:43:49,860 INFO L82 PathProgramCache]: Analyzing trace with hash 769524141, now seen corresponding path program 36 times [2020-09-15 00:43:49,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:43:49,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604563976] [2020-09-15 00:43:49,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:43:49,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:43:54,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 00:43:54,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604563976] [2020-09-15 00:43:54,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151022057] [2020-09-15 00:43:54,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:43:54,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-09-15 00:43:54,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:43:54,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-15 00:43:54,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:43:55,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 00:43:55,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:43:55,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-15 00:43:55,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758706850] [2020-09-15 00:43:55,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-15 00:43:55,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:43:55,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-15 00:43:55,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-15 00:43:55,066 INFO L87 Difference]: Start difference. First operand 2979 states and 3808 transitions. Second operand 63 states. [2020-09-15 00:45:51,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:45:51,081 INFO L93 Difference]: Finished difference Result 30933 states and 43155 transitions. [2020-09-15 00:45:51,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-09-15 00:45:51,082 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-15 00:45:51,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:45:51,133 INFO L225 Difference]: With dead ends: 30933 [2020-09-15 00:45:51,133 INFO L226 Difference]: Without dead ends: 30931 [2020-09-15 00:45:51,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 45.3s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-09-15 00:45:51,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30931 states. [2020-09-15 00:45:51,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30931 to 2985. [2020-09-15 00:45:51,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2985 states. [2020-09-15 00:45:51,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2985 states to 2985 states and 3815 transitions. [2020-09-15 00:45:51,321 INFO L78 Accepts]: Start accepts. Automaton has 2985 states and 3815 transitions. Word has length 148 [2020-09-15 00:45:51,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:45:51,321 INFO L479 AbstractCegarLoop]: Abstraction has 2985 states and 3815 transitions. [2020-09-15 00:45:51,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-15 00:45:51,321 INFO L276 IsEmpty]: Start isEmpty. Operand 2985 states and 3815 transitions. [2020-09-15 00:45:51,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-15 00:45:51,327 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:45:51,327 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:45:51,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-15 00:45:51,541 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:45:51,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:45:51,542 INFO L82 PathProgramCache]: Analyzing trace with hash -188999425, now seen corresponding path program 37 times [2020-09-15 00:45:51,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:45:51,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624772019] [2020-09-15 00:45:51,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:45:51,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:45:56,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 00:45:56,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624772019] [2020-09-15 00:45:56,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793162385] [2020-09-15 00:45:56,173 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:45:56,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:45:56,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-15 00:45:56,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:45:56,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 00:45:56,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:45:56,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-15 00:45:56,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570875358] [2020-09-15 00:45:56,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-15 00:45:56,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:45:56,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-15 00:45:56,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-15 00:45:56,519 INFO L87 Difference]: Start difference. First operand 2985 states and 3815 transitions. Second operand 63 states. [2020-09-15 00:48:06,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:48:06,554 INFO L93 Difference]: Finished difference Result 30927 states and 43146 transitions. [2020-09-15 00:48:06,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-09-15 00:48:06,556 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-15 00:48:06,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:48:06,588 INFO L225 Difference]: With dead ends: 30927 [2020-09-15 00:48:06,588 INFO L226 Difference]: Without dead ends: 30925 [2020-09-15 00:48:06,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 49.7s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-09-15 00:48:06,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30925 states. [2020-09-15 00:48:06,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30925 to 2991. [2020-09-15 00:48:06,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2991 states. [2020-09-15 00:48:06,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 3822 transitions. [2020-09-15 00:48:06,808 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 3822 transitions. Word has length 148 [2020-09-15 00:48:06,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:48:06,808 INFO L479 AbstractCegarLoop]: Abstraction has 2991 states and 3822 transitions. [2020-09-15 00:48:06,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-15 00:48:06,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 3822 transitions. [2020-09-15 00:48:06,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-15 00:48:06,815 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:48:06,815 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:48:07,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-15 00:48:07,031 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:48:07,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:48:07,031 INFO L82 PathProgramCache]: Analyzing trace with hash 48993005, now seen corresponding path program 38 times [2020-09-15 00:48:07,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:48:07,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695886750] [2020-09-15 00:48:07,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:48:07,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:48:12,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 00:48:12,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695886750] [2020-09-15 00:48:12,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296231499] [2020-09-15 00:48:12,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:48:12,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 00:48:12,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:48:12,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-15 00:48:12,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:48:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 00:48:12,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:48:12,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-15 00:48:12,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886538546] [2020-09-15 00:48:12,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-15 00:48:12,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:48:12,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-15 00:48:12,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-15 00:48:12,866 INFO L87 Difference]: Start difference. First operand 2991 states and 3822 transitions. Second operand 63 states.