/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/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-bf4350c [2020-09-18 02:50:08,410 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-18 02:50:08,418 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-18 02:50:08,458 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-18 02:50:08,458 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-18 02:50:08,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-18 02:50:08,474 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-18 02:50:08,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-18 02:50:08,481 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-18 02:50:08,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-18 02:50:08,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-18 02:50:08,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-18 02:50:08,489 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-18 02:50:08,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-18 02:50:08,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-18 02:50:08,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-18 02:50:08,500 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-18 02:50:08,501 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-18 02:50:08,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-18 02:50:08,511 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-18 02:50:08,513 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-18 02:50:08,514 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-18 02:50:08,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-18 02:50:08,517 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-18 02:50:08,522 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-18 02:50:08,522 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-18 02:50:08,522 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-18 02:50:08,526 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-18 02:50:08,527 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-18 02:50:08,529 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-18 02:50:08,529 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-18 02:50:08,530 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-18 02:50:08,532 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-18 02:50:08,533 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-18 02:50:08,534 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-18 02:50:08,535 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-18 02:50:08,536 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-18 02:50:08,536 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-18 02:50:08,536 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-18 02:50:08,537 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-18 02:50:08,539 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-18 02:50:08,540 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2020-09-18 02:50:08,595 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-18 02:50:08,595 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-18 02:50:08,598 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-18 02:50:08,598 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-18 02:50:08,598 INFO L138 SettingsManager]: * Use SBE=true [2020-09-18 02:50:08,599 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-18 02:50:08,599 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-18 02:50:08,599 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-18 02:50:08,599 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-18 02:50:08,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-18 02:50:08,601 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-18 02:50:08,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-18 02:50:08,601 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-18 02:50:08,602 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-18 02:50:08,602 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-18 02:50:08,602 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-18 02:50:08,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-18 02:50:08,603 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-18 02:50:08,603 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-18 02:50:08,603 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-18 02:50:08,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-18 02:50:08,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-18 02:50:08,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-18 02:50:08,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-18 02:50:08,604 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-18 02:50:08,604 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-18 02:50:08,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-18 02:50:08,605 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-09-18 02:50:08,605 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-18 02:50:08,605 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-18 02:50:08,605 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-09-18 02:50:09,073 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-18 02:50:09,102 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-18 02:50:09,109 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-18 02:50:09,111 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-18 02:50:09,112 INFO L275 PluginConnector]: CDTParser initialized [2020-09-18 02:50:09,114 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-09-18 02:50:09,200 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49c56623e/9d823510d86740a08d7e60e0a4aa96cb/FLAG39b9e2202 [2020-09-18 02:50:09,924 INFO L306 CDTParser]: Found 1 translation units. [2020-09-18 02:50:09,925 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-09-18 02:50:09,949 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49c56623e/9d823510d86740a08d7e60e0a4aa96cb/FLAG39b9e2202 [2020-09-18 02:50:10,050 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49c56623e/9d823510d86740a08d7e60e0a4aa96cb [2020-09-18 02:50:10,065 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-18 02:50:10,070 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-18 02:50:10,072 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-18 02:50:10,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-18 02:50:10,075 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-18 02:50:10,076 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 02:50:10" (1/1) ... [2020-09-18 02:50:10,080 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f912d48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 02:50:10, skipping insertion in model container [2020-09-18 02:50:10,080 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 02:50:10" (1/1) ... [2020-09-18 02:50:10,089 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-18 02:50:10,170 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-18 02:50:10,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-18 02:50:10,952 INFO L203 MainTranslator]: Completed pre-run [2020-09-18 02:50:11,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-18 02:50:11,254 INFO L208 MainTranslator]: Completed translation [2020-09-18 02:50:11,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 02:50:11 WrapperNode [2020-09-18 02:50:11,255 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-18 02:50:11,256 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-18 02:50:11,256 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-18 02:50:11,256 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-18 02:50:11,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 02:50:11" (1/1) ... [2020-09-18 02:50:11,291 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 02:50:11" (1/1) ... [2020-09-18 02:50:11,322 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-18 02:50:11,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-18 02:50:11,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-18 02:50:11,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-18 02:50:11,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 02:50:11" (1/1) ... [2020-09-18 02:50:11,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 02:50:11" (1/1) ... [2020-09-18 02:50:11,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 02:50:11" (1/1) ... [2020-09-18 02:50:11,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 02:50:11" (1/1) ... [2020-09-18 02:50:11,345 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 02:50:11" (1/1) ... [2020-09-18 02:50:11,352 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 02:50:11" (1/1) ... [2020-09-18 02:50:11,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 02:50:11" (1/1) ... [2020-09-18 02:50:11,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-18 02:50:11,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-18 02:50:11,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-18 02:50:11,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-18 02:50:11,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 02:50:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-18 02:50:11,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-18 02:50:11,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-18 02:50:11,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-18 02:50:11,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-18 02:50:11,446 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-09-18 02:50:11,447 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2020-09-18 02:50:11,447 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2020-09-18 02:50:11,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-18 02:50:11,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-18 02:50:11,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-18 02:50:11,450 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-18 02:50:11,918 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-18 02:50:11,918 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-09-18 02:50:11,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 02:50:11 BoogieIcfgContainer [2020-09-18 02:50:11,924 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-18 02:50:11,925 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-18 02:50:11,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-18 02:50:11,929 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-18 02:50:11,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 02:50:10" (1/3) ... [2020-09-18 02:50:11,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67b43ba4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 02:50:11, skipping insertion in model container [2020-09-18 02:50:11,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 02:50:11" (2/3) ... [2020-09-18 02:50:11,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67b43ba4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 02:50:11, skipping insertion in model container [2020-09-18 02:50:11,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 02:50:11" (3/3) ... [2020-09-18 02:50:11,934 INFO L109 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2020-09-18 02:50:11,946 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-18 02:50:11,946 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-18 02:50:11,958 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-18 02:50:11,960 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-18 02:50:11,988 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:50:11,988 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:50:11,988 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:50:11,988 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:50:11,989 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:50:11,989 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:50:11,989 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:50:11,989 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:50:11,990 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:50:11,990 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:50:11,990 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:50:11,990 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:50:11,991 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:50:11,991 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:50:11,991 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:50:11,992 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:50:11,992 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:50:11,992 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:50:11,992 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:50:11,992 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:50:11,993 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:50:11,993 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:50:11,993 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:50:11,998 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:50:11,998 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:50:11,998 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:50:11,999 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:50:11,999 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:50:11,999 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:50:11,999 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:50:11,999 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:50:12,000 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:50:12,035 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-18 02:50:12,064 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-18 02:50:12,064 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-18 02:50:12,064 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-18 02:50:12,064 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-09-18 02:50:12,064 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-18 02:50:12,064 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-18 02:50:12,065 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-18 02:50:12,065 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-18 02:50:12,082 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 81 transitions, 170 flow [2020-09-18 02:50:12,084 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 170 flow [2020-09-18 02:50:12,153 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2020-09-18 02:50:12,153 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-18 02:50:12,160 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. [2020-09-18 02:50:12,163 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 170 flow [2020-09-18 02:50:12,186 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2020-09-18 02:50:12,186 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-18 02:50:12,187 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. [2020-09-18 02:50:12,189 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 646 [2020-09-18 02:50:12,190 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-18 02:50:14,130 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-09-18 02:50:14,315 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-09-18 02:50:15,052 WARN L193 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 110 [2020-09-18 02:50:15,338 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-09-18 02:50:15,349 INFO L206 etLargeBlockEncoding]: Checked pairs total: 738 [2020-09-18 02:50:15,350 INFO L214 etLargeBlockEncoding]: Total number of compositions: 70 [2020-09-18 02:50:15,355 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 19 places, 17 transitions, 42 flow [2020-09-18 02:50:15,368 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2020-09-18 02:50:15,371 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-09-18 02:50:15,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-18 02:50:15,381 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:50:15,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:50:15,383 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:50:15,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:50:15,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1717538151, now seen corresponding path program 1 times [2020-09-18 02:50:15,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:50:15,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152270478] [2020-09-18 02:50:15,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:50:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:50:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-18 02:50:15,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152270478] [2020-09-18 02:50:15,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-18 02:50:15,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-18 02:50:15,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1519516546] [2020-09-18 02:50:15,726 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:50:15,733 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:50:15,773 INFO L274 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-09-18 02:50:15,774 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:50:15,819 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [154#(< ULTIMATE.start_main_~i~1 20)] [2020-09-18 02:50:15,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-18 02:50:15,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:50:15,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-18 02:50:15,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-18 02:50:15,841 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 4 states. [2020-09-18 02:50:15,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:50:15,890 INFO L93 Difference]: Finished difference Result 58 states and 112 transitions. [2020-09-18 02:50:15,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-18 02:50:15,892 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-09-18 02:50:15,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:50:15,907 INFO L225 Difference]: With dead ends: 58 [2020-09-18 02:50:15,907 INFO L226 Difference]: Without dead ends: 58 [2020-09-18 02:50:15,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-18 02:50:15,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-18 02:50:15,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-09-18 02:50:15,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-18 02:50:15,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 112 transitions. [2020-09-18 02:50:15,963 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 112 transitions. Word has length 8 [2020-09-18 02:50:15,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:50:15,964 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 112 transitions. [2020-09-18 02:50:15,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-18 02:50:15,964 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 112 transitions. [2020-09-18 02:50:15,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-18 02:50:15,965 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:50:15,965 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:50:15,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-18 02:50:15,966 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:50:15,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:50:15,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1202349723, now seen corresponding path program 1 times [2020-09-18 02:50:15,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:50:15,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701778917] [2020-09-18 02:50:15,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:50:16,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:50:16,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-18 02:50:16,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701778917] [2020-09-18 02:50:16,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-18 02:50:16,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-18 02:50:16,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [722788015] [2020-09-18 02:50:16,049 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:50:16,051 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:50:16,060 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 46 transitions. [2020-09-18 02:50:16,060 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:50:16,181 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [332#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-09-18 02:50:16,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-18 02:50:16,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:50:16,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-18 02:50:16,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-18 02:50:16,184 INFO L87 Difference]: Start difference. First operand 58 states and 112 transitions. Second operand 4 states. [2020-09-18 02:50:16,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:50:16,210 INFO L93 Difference]: Finished difference Result 103 states and 202 transitions. [2020-09-18 02:50:16,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-18 02:50:16,212 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-09-18 02:50:16,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:50:16,214 INFO L225 Difference]: With dead ends: 103 [2020-09-18 02:50:16,214 INFO L226 Difference]: Without dead ends: 103 [2020-09-18 02:50:16,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-18 02:50:16,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-18 02:50:16,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-09-18 02:50:16,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-18 02:50:16,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 202 transitions. [2020-09-18 02:50:16,229 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 202 transitions. Word has length 14 [2020-09-18 02:50:16,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:50:16,230 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 202 transitions. [2020-09-18 02:50:16,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-18 02:50:16,230 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 202 transitions. [2020-09-18 02:50:16,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-18 02:50:16,232 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:50:16,232 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:50:16,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-18 02:50:16,233 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:50:16,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:50:16,233 INFO L82 PathProgramCache]: Analyzing trace with hash -570543039, now seen corresponding path program 1 times [2020-09-18 02:50:16,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:50:16,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874078580] [2020-09-18 02:50:16,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:50:16,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:50:16,359 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-18 02:50:16,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874078580] [2020-09-18 02:50:16,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-18 02:50:16,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-18 02:50:16,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [244070372] [2020-09-18 02:50:16,365 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:50:16,374 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:50:16,386 INFO L274 McrAutomatonBuilder]: Finished intersection with 32 states and 40 transitions. [2020-09-18 02:50:16,386 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:50:16,436 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-18 02:50:16,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-18 02:50:16,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:50:16,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-18 02:50:16,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-18 02:50:16,438 INFO L87 Difference]: Start difference. First operand 103 states and 202 transitions. Second operand 3 states. [2020-09-18 02:50:16,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:50:16,456 INFO L93 Difference]: Finished difference Result 79 states and 124 transitions. [2020-09-18 02:50:16,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-18 02:50:16,457 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-18 02:50:16,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:50:16,458 INFO L225 Difference]: With dead ends: 79 [2020-09-18 02:50:16,458 INFO L226 Difference]: Without dead ends: 79 [2020-09-18 02:50:16,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-18 02:50:16,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-18 02:50:16,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-09-18 02:50:16,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-18 02:50:16,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 124 transitions. [2020-09-18 02:50:16,467 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 124 transitions. Word has length 22 [2020-09-18 02:50:16,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:50:16,468 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 124 transitions. [2020-09-18 02:50:16,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-18 02:50:16,468 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 124 transitions. [2020-09-18 02:50:16,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-18 02:50:16,469 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:50:16,469 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:50:16,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-18 02:50:16,470 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:50:16,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:50:16,470 INFO L82 PathProgramCache]: Analyzing trace with hash 485096059, now seen corresponding path program 2 times [2020-09-18 02:50:16,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:50:16,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23120043] [2020-09-18 02:50:16,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:50:16,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:50:16,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-18 02:50:16,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23120043] [2020-09-18 02:50:16,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56894491] [2020-09-18 02:50:16,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-18 02:50:16,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-18 02:50:16,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-18 02:50:16,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-18 02:50:16,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:50:16,785 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-18 02:50:16,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:50:16,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-18 02:50:16,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1827452793] [2020-09-18 02:50:16,787 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:50:16,793 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:50:16,801 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 38 transitions. [2020-09-18 02:50:16,801 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:50:16,901 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [951#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-09-18 02:50:16,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-18 02:50:16,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:50:16,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-18 02:50:16,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-09-18 02:50:16,902 INFO L87 Difference]: Start difference. First operand 79 states and 124 transitions. Second operand 7 states. [2020-09-18 02:50:16,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:50:16,961 INFO L93 Difference]: Finished difference Result 127 states and 194 transitions. [2020-09-18 02:50:16,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-18 02:50:16,963 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-09-18 02:50:16,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:50:16,965 INFO L225 Difference]: With dead ends: 127 [2020-09-18 02:50:16,965 INFO L226 Difference]: Without dead ends: 127 [2020-09-18 02:50:16,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-09-18 02:50:16,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-18 02:50:16,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-09-18 02:50:16,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-18 02:50:16,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 194 transitions. [2020-09-18 02:50:16,987 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 194 transitions. Word has length 22 [2020-09-18 02:50:16,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:50:16,988 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 194 transitions. [2020-09-18 02:50:16,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-18 02:50:16,991 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 194 transitions. [2020-09-18 02:50:16,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-18 02:50:16,996 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:50:16,996 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:50:17,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-18 02:50:17,198 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:50:17,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:50:17,199 INFO L82 PathProgramCache]: Analyzing trace with hash 517535263, now seen corresponding path program 3 times [2020-09-18 02:50:17,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:50:17,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928884695] [2020-09-18 02:50:17,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:50:17,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:50:17,330 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-09-18 02:50:17,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928884695] [2020-09-18 02:50:17,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730357641] [2020-09-18 02:50:17,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-18 02:50:17,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-18 02:50:17,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-18 02:50:17,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-18 02:50:17,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:50:17,434 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-09-18 02:50:17,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:50:17,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-18 02:50:17,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [926065264] [2020-09-18 02:50:17,435 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:50:17,443 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:50:17,454 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 46 transitions. [2020-09-18 02:50:17,454 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:50:17,576 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1426#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 1427#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-18 02:50:17,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-18 02:50:17,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:50:17,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-18 02:50:17,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-18 02:50:17,577 INFO L87 Difference]: Start difference. First operand 127 states and 194 transitions. Second operand 8 states. [2020-09-18 02:50:17,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:50:17,633 INFO L93 Difference]: Finished difference Result 174 states and 256 transitions. [2020-09-18 02:50:17,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-18 02:50:17,633 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-09-18 02:50:17,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:50:17,635 INFO L225 Difference]: With dead ends: 174 [2020-09-18 02:50:17,635 INFO L226 Difference]: Without dead ends: 174 [2020-09-18 02:50:17,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-18 02:50:17,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-09-18 02:50:17,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 160. [2020-09-18 02:50:17,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-18 02:50:17,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 238 transitions. [2020-09-18 02:50:17,665 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 238 transitions. Word has length 30 [2020-09-18 02:50:17,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:50:17,665 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 238 transitions. [2020-09-18 02:50:17,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-18 02:50:17,665 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 238 transitions. [2020-09-18 02:50:17,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-18 02:50:17,672 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:50:17,672 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:50:17,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-18 02:50:17,874 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:50:17,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:50:17,874 INFO L82 PathProgramCache]: Analyzing trace with hash -2012714619, now seen corresponding path program 4 times [2020-09-18 02:50:17,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:50:17,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614018392] [2020-09-18 02:50:17,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:50:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:50:18,067 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-18 02:50:18,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614018392] [2020-09-18 02:50:18,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201007777] [2020-09-18 02:50:18,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-18 02:50:18,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-18 02:50:18,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-18 02:50:18,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-18 02:50:18,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:50:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-18 02:50:18,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:50:18,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-18 02:50:18,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [720051305] [2020-09-18 02:50:18,182 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:50:18,190 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:50:18,209 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 55 transitions. [2020-09-18 02:50:18,210 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:50:18,278 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2026#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-09-18 02:50:18,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-18 02:50:18,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:50:18,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-18 02:50:18,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-09-18 02:50:18,280 INFO L87 Difference]: Start difference. First operand 160 states and 238 transitions. Second operand 9 states. [2020-09-18 02:50:18,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:50:18,324 INFO L93 Difference]: Finished difference Result 220 states and 322 transitions. [2020-09-18 02:50:18,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-18 02:50:18,324 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-09-18 02:50:18,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:50:18,326 INFO L225 Difference]: With dead ends: 220 [2020-09-18 02:50:18,326 INFO L226 Difference]: Without dead ends: 220 [2020-09-18 02:50:18,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-09-18 02:50:18,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-18 02:50:18,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2020-09-18 02:50:18,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-09-18 02:50:18,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 322 transitions. [2020-09-18 02:50:18,338 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 322 transitions. Word has length 33 [2020-09-18 02:50:18,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:50:18,339 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 322 transitions. [2020-09-18 02:50:18,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-18 02:50:18,339 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 322 transitions. [2020-09-18 02:50:18,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-18 02:50:18,341 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:50:18,341 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:50:18,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-18 02:50:18,555 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:50:18,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:50:18,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1068728479, now seen corresponding path program 5 times [2020-09-18 02:50:18,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:50:18,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482663721] [2020-09-18 02:50:18,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:50:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:50:18,761 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-18 02:50:18,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482663721] [2020-09-18 02:50:18,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819294027] [2020-09-18 02:50:18,762 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-18 02:50:18,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-18 02:50:18,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-18 02:50:18,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-18 02:50:18,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:50:18,915 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-18 02:50:18,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:50:18,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-18 02:50:18,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1988707928] [2020-09-18 02:50:18,916 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:50:18,927 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:50:18,946 INFO L274 McrAutomatonBuilder]: Finished intersection with 53 states and 63 transitions. [2020-09-18 02:50:18,946 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:50:19,017 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2817#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-09-18 02:50:19,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-18 02:50:19,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:50:19,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-18 02:50:19,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-18 02:50:19,019 INFO L87 Difference]: Start difference. First operand 220 states and 322 transitions. Second operand 11 states. [2020-09-18 02:50:19,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:50:19,075 INFO L93 Difference]: Finished difference Result 280 states and 406 transitions. [2020-09-18 02:50:19,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-18 02:50:19,076 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-09-18 02:50:19,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:50:19,078 INFO L225 Difference]: With dead ends: 280 [2020-09-18 02:50:19,078 INFO L226 Difference]: Without dead ends: 280 [2020-09-18 02:50:19,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-18 02:50:19,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-09-18 02:50:19,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2020-09-18 02:50:19,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-09-18 02:50:19,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 406 transitions. [2020-09-18 02:50:19,089 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 406 transitions. Word has length 41 [2020-09-18 02:50:19,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:50:19,090 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 406 transitions. [2020-09-18 02:50:19,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-18 02:50:19,090 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 406 transitions. [2020-09-18 02:50:19,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-18 02:50:19,092 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:50:19,092 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:50:19,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-18 02:50:19,306 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:50:19,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:50:19,307 INFO L82 PathProgramCache]: Analyzing trace with hash 2088433981, now seen corresponding path program 6 times [2020-09-18 02:50:19,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:50:19,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207388701] [2020-09-18 02:50:19,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:50:19,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:50:19,463 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-09-18 02:50:19,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207388701] [2020-09-18 02:50:19,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354954557] [2020-09-18 02:50:19,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-18 02:50:19,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-18 02:50:19,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-18 02:50:19,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2020-09-18 02:50:19,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:50:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-09-18 02:50:19,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:50:19,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-18 02:50:19,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1808536266] [2020-09-18 02:50:19,595 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:50:19,608 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:50:19,672 INFO L274 McrAutomatonBuilder]: Finished intersection with 61 states and 71 transitions. [2020-09-18 02:50:19,673 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:50:19,782 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [3809#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 3810#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-18 02:50:19,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-18 02:50:19,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:50:19,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-18 02:50:19,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-09-18 02:50:19,784 INFO L87 Difference]: Start difference. First operand 280 states and 406 transitions. Second operand 9 states. [2020-09-18 02:50:19,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:50:19,840 INFO L93 Difference]: Finished difference Result 359 states and 504 transitions. [2020-09-18 02:50:19,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-18 02:50:19,841 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-09-18 02:50:19,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:50:19,844 INFO L225 Difference]: With dead ends: 359 [2020-09-18 02:50:19,844 INFO L226 Difference]: Without dead ends: 359 [2020-09-18 02:50:19,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-09-18 02:50:19,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-09-18 02:50:19,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 337. [2020-09-18 02:50:19,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-09-18 02:50:19,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 478 transitions. [2020-09-18 02:50:19,857 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 478 transitions. Word has length 49 [2020-09-18 02:50:19,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:50:19,858 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 478 transitions. [2020-09-18 02:50:19,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-18 02:50:19,858 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 478 transitions. [2020-09-18 02:50:19,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-18 02:50:19,859 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:50:19,860 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:50:20,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-18 02:50:20,075 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:50:20,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:50:20,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1332663897, now seen corresponding path program 7 times [2020-09-18 02:50:20,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:50:20,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167404677] [2020-09-18 02:50:20,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:50:20,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:50:20,251 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 10 proven. 120 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-18 02:50:20,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167404677] [2020-09-18 02:50:20,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12668925] [2020-09-18 02:50:20,252 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-18 02:50:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:50:20,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-18 02:50:20,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:50:20,363 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 10 proven. 120 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-18 02:50:20,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:50:20,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-18 02:50:20,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1083262188] [2020-09-18 02:50:20,365 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:50:20,387 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:50:20,499 INFO L274 McrAutomatonBuilder]: Finished intersection with 67 states and 80 transitions. [2020-09-18 02:50:20,499 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:50:20,595 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5009#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-09-18 02:50:20,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-18 02:50:20,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:50:20,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-18 02:50:20,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-09-18 02:50:20,597 INFO L87 Difference]: Start difference. First operand 337 states and 478 transitions. Second operand 13 states. [2020-09-18 02:50:20,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:50:20,668 INFO L93 Difference]: Finished difference Result 409 states and 576 transitions. [2020-09-18 02:50:20,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-18 02:50:20,669 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-09-18 02:50:20,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:50:20,672 INFO L225 Difference]: With dead ends: 409 [2020-09-18 02:50:20,672 INFO L226 Difference]: Without dead ends: 409 [2020-09-18 02:50:20,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-09-18 02:50:20,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2020-09-18 02:50:20,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 409. [2020-09-18 02:50:20,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2020-09-18 02:50:20,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 576 transitions. [2020-09-18 02:50:20,687 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 576 transitions. Word has length 52 [2020-09-18 02:50:20,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:50:20,688 INFO L479 AbstractCegarLoop]: Abstraction has 409 states and 576 transitions. [2020-09-18 02:50:20,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-18 02:50:20,688 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 576 transitions. [2020-09-18 02:50:20,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-18 02:50:20,690 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:50:20,690 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:50:20,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-18 02:50:20,906 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:50:20,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:50:20,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1082708405, now seen corresponding path program 8 times [2020-09-18 02:50:20,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:50:20,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508224841] [2020-09-18 02:50:20,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:50:20,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:50:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 10 proven. 190 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-18 02:50:21,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508224841] [2020-09-18 02:50:21,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517374892] [2020-09-18 02:50:21,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-18 02:50:21,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-18 02:50:21,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-18 02:50:21,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-18 02:50:21,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:50:21,294 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 10 proven. 190 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-18 02:50:21,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:50:21,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-18 02:50:21,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1360528453] [2020-09-18 02:50:21,296 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:50:21,319 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:50:21,434 INFO L274 McrAutomatonBuilder]: Finished intersection with 75 states and 88 transitions. [2020-09-18 02:50:21,434 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:50:21,521 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6428#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-09-18 02:50:21,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-18 02:50:21,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:50:21,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-18 02:50:21,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-09-18 02:50:21,523 INFO L87 Difference]: Start difference. First operand 409 states and 576 transitions. Second operand 15 states. [2020-09-18 02:50:21,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:50:21,594 INFO L93 Difference]: Finished difference Result 481 states and 674 transitions. [2020-09-18 02:50:21,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-18 02:50:21,595 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 60 [2020-09-18 02:50:21,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:50:21,597 INFO L225 Difference]: With dead ends: 481 [2020-09-18 02:50:21,598 INFO L226 Difference]: Without dead ends: 481 [2020-09-18 02:50:21,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-09-18 02:50:21,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2020-09-18 02:50:21,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 481. [2020-09-18 02:50:21,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2020-09-18 02:50:21,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 674 transitions. [2020-09-18 02:50:21,608 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 674 transitions. Word has length 60 [2020-09-18 02:50:21,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:50:21,609 INFO L479 AbstractCegarLoop]: Abstraction has 481 states and 674 transitions. [2020-09-18 02:50:21,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-18 02:50:21,609 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 674 transitions. [2020-09-18 02:50:21,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-18 02:50:21,610 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:50:21,611 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:50:21,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-18 02:50:21,825 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:50:21,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:50:21,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1779413265, now seen corresponding path program 9 times [2020-09-18 02:50:21,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:50:21,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357046376] [2020-09-18 02:50:21,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:50:21,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:50:22,098 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 10 proven. 276 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-18 02:50:22,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357046376] [2020-09-18 02:50:22,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224019698] [2020-09-18 02:50:22,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-18 02:50:22,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-18 02:50:22,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-18 02:50:22,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-18 02:50:22,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:50:22,275 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-09-18 02:50:22,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:50:22,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2020-09-18 02:50:22,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1198978493] [2020-09-18 02:50:22,277 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:50:22,301 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:50:22,433 INFO L274 McrAutomatonBuilder]: Finished intersection with 83 states and 96 transitions. [2020-09-18 02:50:22,433 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:50:22,574 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [8093#(< thread_function_mutexThread1of1ForFork0_~i~0 20), 8094#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-18 02:50:22,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-18 02:50:22,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:50:22,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-18 02:50:22,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2020-09-18 02:50:22,576 INFO L87 Difference]: Start difference. First operand 481 states and 674 transitions. Second operand 22 states. [2020-09-18 02:50:25,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:50:25,695 INFO L93 Difference]: Finished difference Result 680 states and 924 transitions. [2020-09-18 02:50:25,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-09-18 02:50:25,695 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2020-09-18 02:50:25,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:50:25,698 INFO L225 Difference]: With dead ends: 680 [2020-09-18 02:50:25,699 INFO L226 Difference]: Without dead ends: 680 [2020-09-18 02:50:25,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 158 SyntacticMatches, 3 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3608 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2880, Invalid=8250, Unknown=0, NotChecked=0, Total=11130 [2020-09-18 02:50:25,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2020-09-18 02:50:25,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 646. [2020-09-18 02:50:25,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 646 states. [2020-09-18 02:50:25,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 886 transitions. [2020-09-18 02:50:25,717 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 886 transitions. Word has length 68 [2020-09-18 02:50:25,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:50:25,718 INFO L479 AbstractCegarLoop]: Abstraction has 646 states and 886 transitions. [2020-09-18 02:50:25,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-18 02:50:25,718 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 886 transitions. [2020-09-18 02:50:25,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-18 02:50:25,720 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:50:25,721 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:50:25,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-09-18 02:50:25,933 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:50:25,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:50:25,934 INFO L82 PathProgramCache]: Analyzing trace with hash 72445841, now seen corresponding path program 10 times [2020-09-18 02:50:25,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:50:25,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974950003] [2020-09-18 02:50:25,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:50:25,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:50:26,273 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 13 proven. 378 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-18 02:50:26,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974950003] [2020-09-18 02:50:26,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342695727] [2020-09-18 02:50:26,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-18 02:50:26,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-18 02:50:26,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-18 02:50:26,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-18 02:50:26,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:50:26,558 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 13 proven. 378 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-18 02:50:26,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:50:26,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-18 02:50:26,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [398022671] [2020-09-18 02:50:26,559 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:50:26,593 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:50:27,029 INFO L274 McrAutomatonBuilder]: Finished intersection with 97 states and 113 transitions. [2020-09-18 02:50:27,030 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:50:27,146 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10558#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-09-18 02:50:27,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-18 02:50:27,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:50:27,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-18 02:50:27,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-09-18 02:50:27,148 INFO L87 Difference]: Start difference. First operand 646 states and 886 transitions. Second operand 19 states. [2020-09-18 02:50:27,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:50:27,257 INFO L93 Difference]: Finished difference Result 730 states and 998 transitions. [2020-09-18 02:50:27,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-18 02:50:27,259 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 79 [2020-09-18 02:50:27,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:50:27,263 INFO L225 Difference]: With dead ends: 730 [2020-09-18 02:50:27,263 INFO L226 Difference]: Without dead ends: 730 [2020-09-18 02:50:27,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-09-18 02:50:27,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2020-09-18 02:50:27,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 730. [2020-09-18 02:50:27,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 730 states. [2020-09-18 02:50:27,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 998 transitions. [2020-09-18 02:50:27,281 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 998 transitions. Word has length 79 [2020-09-18 02:50:27,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:50:27,282 INFO L479 AbstractCegarLoop]: Abstraction has 730 states and 998 transitions. [2020-09-18 02:50:27,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-18 02:50:27,282 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 998 transitions. [2020-09-18 02:50:27,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-18 02:50:27,287 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:50:27,287 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:50:27,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-18 02:50:27,502 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:50:27,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:50:27,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1605477485, now seen corresponding path program 11 times [2020-09-18 02:50:27,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:50:27,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593804832] [2020-09-18 02:50:27,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:50:27,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:50:27,853 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 13 proven. 496 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-18 02:50:27,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593804832] [2020-09-18 02:50:27,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119784466] [2020-09-18 02:50:27,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-18 02:50:27,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-09-18 02:50:27,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-18 02:50:27,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-18 02:50:27,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:50:28,049 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 13 proven. 496 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-18 02:50:28,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:50:28,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-18 02:50:28,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [520867317] [2020-09-18 02:50:28,050 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:50:28,087 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:50:28,187 INFO L274 McrAutomatonBuilder]: Finished intersection with 105 states and 121 transitions. [2020-09-18 02:50:28,187 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:50:28,315 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13027#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-09-18 02:50:28,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-18 02:50:28,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:50:28,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-18 02:50:28,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-09-18 02:50:28,316 INFO L87 Difference]: Start difference. First operand 730 states and 998 transitions. Second operand 21 states. [2020-09-18 02:50:28,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:50:28,409 INFO L93 Difference]: Finished difference Result 814 states and 1110 transitions. [2020-09-18 02:50:28,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-18 02:50:28,409 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 87 [2020-09-18 02:50:28,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:50:28,413 INFO L225 Difference]: With dead ends: 814 [2020-09-18 02:50:28,413 INFO L226 Difference]: Without dead ends: 814 [2020-09-18 02:50:28,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-09-18 02:50:28,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2020-09-18 02:50:28,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 814. [2020-09-18 02:50:28,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 814 states. [2020-09-18 02:50:28,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1110 transitions. [2020-09-18 02:50:28,469 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1110 transitions. Word has length 87 [2020-09-18 02:50:28,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:50:28,469 INFO L479 AbstractCegarLoop]: Abstraction has 814 states and 1110 transitions. [2020-09-18 02:50:28,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-18 02:50:28,469 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1110 transitions. [2020-09-18 02:50:28,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-09-18 02:50:28,474 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:50:28,474 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:50:28,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-18 02:50:28,686 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:50:28,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:50:28,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1402127031, now seen corresponding path program 12 times [2020-09-18 02:50:28,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:50:28,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608630383] [2020-09-18 02:50:28,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:50:28,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:50:29,129 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 13 proven. 630 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-18 02:50:29,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608630383] [2020-09-18 02:50:29,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230388109] [2020-09-18 02:50:29,130 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-18 02:50:29,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-18 02:50:29,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-18 02:50:29,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-18 02:50:29,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:50:29,417 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-09-18 02:50:29,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:50:29,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 8] total 27 [2020-09-18 02:50:29,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [244334731] [2020-09-18 02:50:29,421 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:50:29,499 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:50:29,784 INFO L274 McrAutomatonBuilder]: Finished intersection with 113 states and 129 transitions. [2020-09-18 02:50:29,785 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:50:29,994 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [15779#(< thread_function_mutexThread1of1ForFork0_~i~0 20), 15780#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-18 02:50:29,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-18 02:50:29,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:50:29,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-18 02:50:29,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2020-09-18 02:50:29,996 INFO L87 Difference]: Start difference. First operand 814 states and 1110 transitions. Second operand 29 states. [2020-09-18 02:50:36,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:50:36,939 INFO L93 Difference]: Finished difference Result 1073 states and 1428 transitions. [2020-09-18 02:50:36,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2020-09-18 02:50:36,940 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 95 [2020-09-18 02:50:36,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:50:36,946 INFO L225 Difference]: With dead ends: 1073 [2020-09-18 02:50:36,946 INFO L226 Difference]: Without dead ends: 1073 [2020-09-18 02:50:36,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 239 SyntacticMatches, 4 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9948 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=7161, Invalid=21231, Unknown=0, NotChecked=0, Total=28392 [2020-09-18 02:50:36,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2020-09-18 02:50:36,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 1027. [2020-09-18 02:50:36,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1027 states. [2020-09-18 02:50:36,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 1378 transitions. [2020-09-18 02:50:36,979 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 1378 transitions. Word has length 95 [2020-09-18 02:50:36,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:50:36,980 INFO L479 AbstractCegarLoop]: Abstraction has 1027 states and 1378 transitions. [2020-09-18 02:50:36,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-18 02:50:36,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 1378 transitions. [2020-09-18 02:50:36,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-09-18 02:50:36,983 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:50:36,983 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:50:37,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-18 02:50:37,200 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:50:37,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:50:37,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1502437311, now seen corresponding path program 13 times [2020-09-18 02:50:37,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:50:37,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3864273] [2020-09-18 02:50:37,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:50:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:50:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 831 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-18 02:50:37,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3864273] [2020-09-18 02:50:37,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38870949] [2020-09-18 02:50:37,469 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-18 02:50:37,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:50:37,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-18 02:50:37,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:50:37,617 INFO L134 CoverageAnalysis]: Checked inductivity of 831 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-18 02:50:37,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:50:37,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-18 02:50:37,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2002331965] [2020-09-18 02:50:37,619 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:50:37,957 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:50:38,175 INFO L274 McrAutomatonBuilder]: Finished intersection with 127 states and 146 transitions. [2020-09-18 02:50:38,175 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:50:38,379 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [19634#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 19635#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-18 02:50:38,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-18 02:50:38,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:50:38,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-18 02:50:38,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2020-09-18 02:50:38,381 INFO L87 Difference]: Start difference. First operand 1027 states and 1378 transitions. Second operand 12 states. [2020-09-18 02:50:38,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:50:38,468 INFO L93 Difference]: Finished difference Result 1202 states and 1584 transitions. [2020-09-18 02:50:38,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-18 02:50:38,468 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 106 [2020-09-18 02:50:38,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:50:38,474 INFO L225 Difference]: With dead ends: 1202 [2020-09-18 02:50:38,474 INFO L226 Difference]: Without dead ends: 1202 [2020-09-18 02:50:38,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2020-09-18 02:50:38,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2020-09-18 02:50:38,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1156. [2020-09-18 02:50:38,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1156 states. [2020-09-18 02:50:38,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1534 transitions. [2020-09-18 02:50:38,506 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1534 transitions. Word has length 106 [2020-09-18 02:50:38,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:50:38,507 INFO L479 AbstractCegarLoop]: Abstraction has 1156 states and 1534 transitions. [2020-09-18 02:50:38,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-18 02:50:38,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1534 transitions. [2020-09-18 02:50:38,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-18 02:50:38,512 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:50:38,512 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:50:38,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-18 02:50:38,727 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:50:38,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:50:38,728 INFO L82 PathProgramCache]: Analyzing trace with hash 282598373, now seen corresponding path program 14 times [2020-09-18 02:50:38,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:50:38,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601046931] [2020-09-18 02:50:38,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:50:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:50:39,100 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-18 02:50:39,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601046931] [2020-09-18 02:50:39,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606361961] [2020-09-18 02:50:39,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-18 02:50:39,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-18 02:50:39,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-18 02:50:39,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-18 02:50:39,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:50:39,415 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-18 02:50:39,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:50:39,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-18 02:50:39,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1803470479] [2020-09-18 02:50:39,418 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:50:39,548 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:50:39,844 INFO L274 McrAutomatonBuilder]: Finished intersection with 133 states and 155 transitions. [2020-09-18 02:50:39,845 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:50:40,094 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [23485#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 23486#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-18 02:50:40,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-18 02:50:40,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:50:40,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-18 02:50:40,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-09-18 02:50:40,095 INFO L87 Difference]: Start difference. First operand 1156 states and 1534 transitions. Second operand 13 states. [2020-09-18 02:50:40,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:50:40,188 INFO L93 Difference]: Finished difference Result 1331 states and 1740 transitions. [2020-09-18 02:50:40,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-18 02:50:40,188 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 109 [2020-09-18 02:50:40,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:50:40,194 INFO L225 Difference]: With dead ends: 1331 [2020-09-18 02:50:40,195 INFO L226 Difference]: Without dead ends: 1331 [2020-09-18 02:50:40,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 141 SyntacticMatches, 12 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-09-18 02:50:40,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2020-09-18 02:50:40,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1285. [2020-09-18 02:50:40,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1285 states. [2020-09-18 02:50:40,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 1690 transitions. [2020-09-18 02:50:40,222 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 1690 transitions. Word has length 109 [2020-09-18 02:50:40,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:50:40,222 INFO L479 AbstractCegarLoop]: Abstraction has 1285 states and 1690 transitions. [2020-09-18 02:50:40,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-18 02:50:40,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 1690 transitions. [2020-09-18 02:50:40,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-09-18 02:50:40,226 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:50:40,226 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:50:40,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-18 02:50:40,441 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:50:40,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:50:40,442 INFO L82 PathProgramCache]: Analyzing trace with hash -220912129, now seen corresponding path program 15 times [2020-09-18 02:50:40,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:50:40,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908078003] [2020-09-18 02:50:40,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:50:40,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:50:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-18 02:50:40,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908078003] [2020-09-18 02:50:40,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754511640] [2020-09-18 02:50:40,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-18 02:50:41,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-18 02:50:41,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-18 02:50:41,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-18 02:50:41,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:50:41,090 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-18 02:50:41,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:50:41,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-18 02:50:41,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1058518149] [2020-09-18 02:50:41,091 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:50:41,168 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:50:41,438 INFO L274 McrAutomatonBuilder]: Finished intersection with 139 states and 164 transitions. [2020-09-18 02:50:41,438 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:50:41,739 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [27733#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 27734#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-18 02:50:41,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-18 02:50:41,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:50:41,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-18 02:50:41,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2020-09-18 02:50:41,756 INFO L87 Difference]: Start difference. First operand 1285 states and 1690 transitions. Second operand 14 states. [2020-09-18 02:50:41,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:50:41,837 INFO L93 Difference]: Finished difference Result 1460 states and 1896 transitions. [2020-09-18 02:50:41,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-18 02:50:41,838 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 112 [2020-09-18 02:50:41,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:50:41,844 INFO L225 Difference]: With dead ends: 1460 [2020-09-18 02:50:41,844 INFO L226 Difference]: Without dead ends: 1460 [2020-09-18 02:50:41,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 148 SyntacticMatches, 14 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2020-09-18 02:50:41,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2020-09-18 02:50:41,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1414. [2020-09-18 02:50:41,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1414 states. [2020-09-18 02:50:41,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 1846 transitions. [2020-09-18 02:50:41,871 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 1846 transitions. Word has length 112 [2020-09-18 02:50:41,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:50:41,872 INFO L479 AbstractCegarLoop]: Abstraction has 1414 states and 1846 transitions. [2020-09-18 02:50:41,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-18 02:50:41,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 1846 transitions. [2020-09-18 02:50:41,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-09-18 02:50:41,876 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:50:41,876 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:50:42,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-18 02:50:42,091 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:50:42,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:50:42,092 INFO L82 PathProgramCache]: Analyzing trace with hash 2018487717, now seen corresponding path program 16 times [2020-09-18 02:50:42,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:50:42,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211957801] [2020-09-18 02:50:42,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:50:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:50:42,407 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-18 02:50:42,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211957801] [2020-09-18 02:50:42,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999067103] [2020-09-18 02:50:42,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-18 02:50:43,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-18 02:50:43,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-18 02:50:43,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-18 02:50:43,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:50:43,083 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-18 02:50:43,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:50:43,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-18 02:50:43,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1719175021] [2020-09-18 02:50:43,084 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:50:43,147 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:50:43,583 INFO L274 McrAutomatonBuilder]: Finished intersection with 145 states and 173 transitions. [2020-09-18 02:50:43,583 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:50:43,912 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [32378#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 32379#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-18 02:50:43,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-18 02:50:43,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:50:43,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-18 02:50:43,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2020-09-18 02:50:43,914 INFO L87 Difference]: Start difference. First operand 1414 states and 1846 transitions. Second operand 15 states. [2020-09-18 02:50:43,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:50:43,988 INFO L93 Difference]: Finished difference Result 1589 states and 2052 transitions. [2020-09-18 02:50:43,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-18 02:50:43,989 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 115 [2020-09-18 02:50:43,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:50:43,996 INFO L225 Difference]: With dead ends: 1589 [2020-09-18 02:50:43,996 INFO L226 Difference]: Without dead ends: 1589 [2020-09-18 02:50:43,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 155 SyntacticMatches, 16 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2020-09-18 02:50:43,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2020-09-18 02:50:44,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1543. [2020-09-18 02:50:44,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-09-18 02:50:44,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2002 transitions. [2020-09-18 02:50:44,022 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2002 transitions. Word has length 115 [2020-09-18 02:50:44,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:50:44,022 INFO L479 AbstractCegarLoop]: Abstraction has 1543 states and 2002 transitions. [2020-09-18 02:50:44,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-18 02:50:44,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2002 transitions. [2020-09-18 02:50:44,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-09-18 02:50:44,027 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:50:44,027 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:50:44,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-18 02:50:44,240 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:50:44,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:50:44,241 INFO L82 PathProgramCache]: Analyzing trace with hash -2042676161, now seen corresponding path program 17 times [2020-09-18 02:50:44,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:50:44,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944890720] [2020-09-18 02:50:44,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:50:44,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:50:44,562 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-18 02:50:44,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944890720] [2020-09-18 02:50:44,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785000930] [2020-09-18 02:50:44,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-18 02:50:44,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-09-18 02:50:44,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-18 02:50:44,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-18 02:50:44,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:50:44,917 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-18 02:50:44,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:50:44,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-18 02:50:44,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1619551382] [2020-09-18 02:50:44,919 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:50:44,969 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:50:45,832 INFO L274 McrAutomatonBuilder]: Finished intersection with 151 states and 182 transitions. [2020-09-18 02:50:45,832 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:50:46,248 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [37420#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 37421#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-18 02:50:46,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-18 02:50:46,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:50:46,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-18 02:50:46,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2020-09-18 02:50:46,249 INFO L87 Difference]: Start difference. First operand 1543 states and 2002 transitions. Second operand 16 states. [2020-09-18 02:50:46,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:50:46,356 INFO L93 Difference]: Finished difference Result 1718 states and 2208 transitions. [2020-09-18 02:50:46,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-18 02:50:46,356 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 118 [2020-09-18 02:50:46,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:50:46,361 INFO L225 Difference]: With dead ends: 1718 [2020-09-18 02:50:46,362 INFO L226 Difference]: Without dead ends: 1718 [2020-09-18 02:50:46,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 162 SyntacticMatches, 18 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2020-09-18 02:50:46,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2020-09-18 02:50:46,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1672. [2020-09-18 02:50:46,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1672 states. [2020-09-18 02:50:46,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2158 transitions. [2020-09-18 02:50:46,388 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2158 transitions. Word has length 118 [2020-09-18 02:50:46,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:50:46,388 INFO L479 AbstractCegarLoop]: Abstraction has 1672 states and 2158 transitions. [2020-09-18 02:50:46,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-18 02:50:46,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2158 transitions. [2020-09-18 02:50:46,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-09-18 02:50:46,393 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:50:46,393 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:50:46,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-18 02:50:46,608 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:50:46,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:50:46,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1052962661, now seen corresponding path program 18 times [2020-09-18 02:50:46,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:50:46,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486144160] [2020-09-18 02:50:46,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:50:46,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:50:46,955 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-18 02:50:46,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486144160] [2020-09-18 02:50:46,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148650745] [2020-09-18 02:50:46,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-18 02:50:47,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-09-18 02:50:47,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-18 02:50:47,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-18 02:50:47,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:50:47,399 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-18 02:50:47,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:50:47,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-18 02:50:47,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [691126110] [2020-09-18 02:50:47,401 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:50:47,449 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:50:47,949 INFO L274 McrAutomatonBuilder]: Finished intersection with 157 states and 191 transitions. [2020-09-18 02:50:47,950 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:50:48,502 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [42859#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 42860#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-18 02:50:48,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-18 02:50:48,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:50:48,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-18 02:50:48,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=159, Unknown=0, NotChecked=0, Total=272 [2020-09-18 02:50:48,503 INFO L87 Difference]: Start difference. First operand 1672 states and 2158 transitions. Second operand 17 states. [2020-09-18 02:50:48,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:50:48,608 INFO L93 Difference]: Finished difference Result 1847 states and 2364 transitions. [2020-09-18 02:50:48,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-18 02:50:48,609 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 121 [2020-09-18 02:50:48,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:50:48,619 INFO L225 Difference]: With dead ends: 1847 [2020-09-18 02:50:48,620 INFO L226 Difference]: Without dead ends: 1847 [2020-09-18 02:50:48,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 169 SyntacticMatches, 20 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=159, Unknown=0, NotChecked=0, Total=272 [2020-09-18 02:50:48,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2020-09-18 02:50:48,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1801. [2020-09-18 02:50:48,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1801 states. [2020-09-18 02:50:48,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2314 transitions. [2020-09-18 02:50:48,665 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2314 transitions. Word has length 121 [2020-09-18 02:50:48,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:50:48,665 INFO L479 AbstractCegarLoop]: Abstraction has 1801 states and 2314 transitions. [2020-09-18 02:50:48,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-18 02:50:48,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2314 transitions. [2020-09-18 02:50:48,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-09-18 02:50:48,673 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:50:48,673 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:50:48,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-18 02:50:48,888 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:50:48,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:50:48,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1691329151, now seen corresponding path program 19 times [2020-09-18 02:50:48,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:50:48,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985039439] [2020-09-18 02:50:48,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:50:48,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:50:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-18 02:50:49,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985039439] [2020-09-18 02:50:49,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496747037] [2020-09-18 02:50:49,274 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-18 02:50:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:50:49,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-18 02:50:49,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:50:49,425 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-18 02:50:49,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:50:49,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-18 02:50:49,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [611203743] [2020-09-18 02:50:49,427 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:50:49,488 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:50:49,928 INFO L274 McrAutomatonBuilder]: Finished intersection with 163 states and 200 transitions. [2020-09-18 02:50:49,928 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:50:50,475 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [48695#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 48696#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-18 02:50:50,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-18 02:50:50,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:50:50,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-18 02:50:50,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2020-09-18 02:50:50,477 INFO L87 Difference]: Start difference. First operand 1801 states and 2314 transitions. Second operand 18 states. [2020-09-18 02:50:50,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:50:50,572 INFO L93 Difference]: Finished difference Result 1976 states and 2520 transitions. [2020-09-18 02:50:50,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-18 02:50:50,572 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 124 [2020-09-18 02:50:50,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:50:50,579 INFO L225 Difference]: With dead ends: 1976 [2020-09-18 02:50:50,579 INFO L226 Difference]: Without dead ends: 1976 [2020-09-18 02:50:50,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 176 SyntacticMatches, 22 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2020-09-18 02:50:50,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2020-09-18 02:50:50,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1930. [2020-09-18 02:50:50,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1930 states. [2020-09-18 02:50:50,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2470 transitions. [2020-09-18 02:50:50,609 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2470 transitions. Word has length 124 [2020-09-18 02:50:50,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:50:50,609 INFO L479 AbstractCegarLoop]: Abstraction has 1930 states and 2470 transitions. [2020-09-18 02:50:50,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-18 02:50:50,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2470 transitions. [2020-09-18 02:50:50,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-09-18 02:50:50,615 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:50:50,615 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:50:50,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-18 02:50:50,829 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:50:50,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:50:50,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1152246053, now seen corresponding path program 20 times [2020-09-18 02:50:50,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:50:50,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901724194] [2020-09-18 02:50:50,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:50:50,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:50:51,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-18 02:50:51,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901724194] [2020-09-18 02:50:51,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670713970] [2020-09-18 02:50:51,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-18 02:50:51,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-18 02:50:51,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-18 02:50:51,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-18 02:50:51,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:50:51,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-18 02:50:51,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:50:51,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-18 02:50:51,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1423444764] [2020-09-18 02:50:51,519 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:50:51,594 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:50:52,133 INFO L274 McrAutomatonBuilder]: Finished intersection with 169 states and 209 transitions. [2020-09-18 02:50:52,133 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:50:52,812 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [54928#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 54929#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-18 02:50:52,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-18 02:50:52,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:50:52,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-18 02:50:52,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=198, Unknown=0, NotChecked=0, Total=342 [2020-09-18 02:50:52,814 INFO L87 Difference]: Start difference. First operand 1930 states and 2470 transitions. Second operand 19 states. [2020-09-18 02:50:53,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:50:53,006 INFO L93 Difference]: Finished difference Result 2105 states and 2676 transitions. [2020-09-18 02:50:53,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-18 02:50:53,007 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 127 [2020-09-18 02:50:53,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:50:53,019 INFO L225 Difference]: With dead ends: 2105 [2020-09-18 02:50:53,019 INFO L226 Difference]: Without dead ends: 2105 [2020-09-18 02:50:53,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 183 SyntacticMatches, 24 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=198, Unknown=0, NotChecked=0, Total=342 [2020-09-18 02:50:53,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2020-09-18 02:50:53,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 2059. [2020-09-18 02:50:53,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2059 states. [2020-09-18 02:50:53,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 2626 transitions. [2020-09-18 02:50:53,075 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 2626 transitions. Word has length 127 [2020-09-18 02:50:53,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:50:53,076 INFO L479 AbstractCegarLoop]: Abstraction has 2059 states and 2626 transitions. [2020-09-18 02:50:53,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-18 02:50:53,077 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 2626 transitions. [2020-09-18 02:50:53,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-09-18 02:50:53,085 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:50:53,086 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:50:53,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-18 02:50:53,301 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:50:53,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:50:53,302 INFO L82 PathProgramCache]: Analyzing trace with hash 210393279, now seen corresponding path program 21 times [2020-09-18 02:50:53,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:50:53,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055736898] [2020-09-18 02:50:53,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:50:53,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:50:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-18 02:50:53,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055736898] [2020-09-18 02:50:53,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779548471] [2020-09-18 02:50:53,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-18 02:50:54,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-09-18 02:50:54,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-18 02:50:54,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-18 02:50:54,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:50:54,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-18 02:50:54,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:50:54,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-18 02:50:54,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2046302284] [2020-09-18 02:50:54,073 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:50:54,118 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:50:54,553 INFO L274 McrAutomatonBuilder]: Finished intersection with 175 states and 218 transitions. [2020-09-18 02:50:54,553 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:50:55,203 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [61558#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 61559#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-18 02:50:55,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-18 02:50:55,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:50:55,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-18 02:50:55,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=219, Unknown=0, NotChecked=0, Total=380 [2020-09-18 02:50:55,205 INFO L87 Difference]: Start difference. First operand 2059 states and 2626 transitions. Second operand 20 states. [2020-09-18 02:50:55,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:50:55,350 INFO L93 Difference]: Finished difference Result 2234 states and 2832 transitions. [2020-09-18 02:50:55,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-18 02:50:55,351 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 130 [2020-09-18 02:50:55,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:50:55,357 INFO L225 Difference]: With dead ends: 2234 [2020-09-18 02:50:55,358 INFO L226 Difference]: Without dead ends: 2234 [2020-09-18 02:50:55,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 190 SyntacticMatches, 26 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=219, Unknown=0, NotChecked=0, Total=380 [2020-09-18 02:50:55,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2020-09-18 02:50:55,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2188. [2020-09-18 02:50:55,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2188 states. [2020-09-18 02:50:55,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 2782 transitions. [2020-09-18 02:50:55,387 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 2782 transitions. Word has length 130 [2020-09-18 02:50:55,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:50:55,387 INFO L479 AbstractCegarLoop]: Abstraction has 2188 states and 2782 transitions. [2020-09-18 02:50:55,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-18 02:50:55,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 2782 transitions. [2020-09-18 02:50:55,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-09-18 02:50:55,393 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:50:55,393 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:50:55,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-18 02:50:55,607 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:50:55,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:50:55,608 INFO L82 PathProgramCache]: Analyzing trace with hash 495747813, now seen corresponding path program 22 times [2020-09-18 02:50:55,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:50:55,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744149229] [2020-09-18 02:50:55,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:50:55,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:50:56,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-18 02:50:56,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744149229] [2020-09-18 02:50:56,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243749565] [2020-09-18 02:50:56,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-18 02:50:57,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-18 02:50:57,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-18 02:50:57,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-18 02:50:57,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:50:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-18 02:50:57,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:50:57,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-18 02:50:57,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1774766195] [2020-09-18 02:50:57,829 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:50:57,897 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:50:58,405 INFO L274 McrAutomatonBuilder]: Finished intersection with 181 states and 227 transitions. [2020-09-18 02:50:58,405 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:50:59,104 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [68585#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 68586#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-18 02:50:59,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-18 02:50:59,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:50:59,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-18 02:50:59,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=241, Unknown=0, NotChecked=0, Total=420 [2020-09-18 02:50:59,105 INFO L87 Difference]: Start difference. First operand 2188 states and 2782 transitions. Second operand 21 states. [2020-09-18 02:50:59,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:50:59,227 INFO L93 Difference]: Finished difference Result 2363 states and 2988 transitions. [2020-09-18 02:50:59,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-18 02:50:59,228 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 133 [2020-09-18 02:50:59,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:50:59,237 INFO L225 Difference]: With dead ends: 2363 [2020-09-18 02:50:59,238 INFO L226 Difference]: Without dead ends: 2363 [2020-09-18 02:50:59,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 197 SyntacticMatches, 28 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=241, Unknown=0, NotChecked=0, Total=420 [2020-09-18 02:50:59,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2020-09-18 02:50:59,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 2317. [2020-09-18 02:50:59,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2317 states. [2020-09-18 02:50:59,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 2938 transitions. [2020-09-18 02:50:59,273 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 2938 transitions. Word has length 133 [2020-09-18 02:50:59,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:50:59,274 INFO L479 AbstractCegarLoop]: Abstraction has 2317 states and 2938 transitions. [2020-09-18 02:50:59,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-18 02:50:59,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 2938 transitions. [2020-09-18 02:50:59,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-18 02:50:59,280 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:50:59,280 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:50:59,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-18 02:50:59,495 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:50:59,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:50:59,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1752391423, now seen corresponding path program 23 times [2020-09-18 02:50:59,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:50:59,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241260632] [2020-09-18 02:50:59,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:50:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:50:59,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-18 02:50:59,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241260632] [2020-09-18 02:50:59,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789203564] [2020-09-18 02:50:59,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-18 02:51:00,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-09-18 02:51:00,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-18 02:51:00,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-18 02:51:00,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:51:00,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-18 02:51:00,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:51:00,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-18 02:51:00,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [284776121] [2020-09-18 02:51:00,319 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:51:00,357 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:51:00,841 INFO L274 McrAutomatonBuilder]: Finished intersection with 187 states and 236 transitions. [2020-09-18 02:51:00,842 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:51:01,620 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [76009#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 76010#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-18 02:51:01,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-18 02:51:01,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:51:01,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-18 02:51:01,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=264, Unknown=0, NotChecked=0, Total=462 [2020-09-18 02:51:01,621 INFO L87 Difference]: Start difference. First operand 2317 states and 2938 transitions. Second operand 22 states. [2020-09-18 02:51:01,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:51:01,753 INFO L93 Difference]: Finished difference Result 2492 states and 3144 transitions. [2020-09-18 02:51:01,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-18 02:51:01,754 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 136 [2020-09-18 02:51:01,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:51:01,761 INFO L225 Difference]: With dead ends: 2492 [2020-09-18 02:51:01,761 INFO L226 Difference]: Without dead ends: 2492 [2020-09-18 02:51:01,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 204 SyntacticMatches, 30 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=264, Unknown=0, NotChecked=0, Total=462 [2020-09-18 02:51:01,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2020-09-18 02:51:01,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 2446. [2020-09-18 02:51:01,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2446 states. [2020-09-18 02:51:01,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2446 states to 2446 states and 3094 transitions. [2020-09-18 02:51:01,795 INFO L78 Accepts]: Start accepts. Automaton has 2446 states and 3094 transitions. Word has length 136 [2020-09-18 02:51:01,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:51:01,795 INFO L479 AbstractCegarLoop]: Abstraction has 2446 states and 3094 transitions. [2020-09-18 02:51:01,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-18 02:51:01,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2446 states and 3094 transitions. [2020-09-18 02:51:01,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-18 02:51:01,800 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:51:01,800 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:51:02,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-18 02:51:02,015 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:51:02,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:51:02,015 INFO L82 PathProgramCache]: Analyzing trace with hash -807742299, now seen corresponding path program 24 times [2020-09-18 02:51:02,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:51:02,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826202998] [2020-09-18 02:51:02,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:51:02,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:51:02,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-18 02:51:02,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826202998] [2020-09-18 02:51:02,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881450769] [2020-09-18 02:51:02,542 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-18 02:51:03,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-09-18 02:51:03,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-18 02:51:03,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-18 02:51:03,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:51:03,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-18 02:51:03,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:51:03,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-18 02:51:03,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [793703394] [2020-09-18 02:51:03,305 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:51:03,364 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:51:04,259 INFO L274 McrAutomatonBuilder]: Finished intersection with 193 states and 245 transitions. [2020-09-18 02:51:04,260 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:51:05,191 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [83831#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0)), 83830#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-09-18 02:51:05,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-18 02:51:05,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:51:05,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-18 02:51:05,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=288, Unknown=0, NotChecked=0, Total=506 [2020-09-18 02:51:05,192 INFO L87 Difference]: Start difference. First operand 2446 states and 3094 transitions. Second operand 23 states. [2020-09-18 02:51:05,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:51:05,323 INFO L93 Difference]: Finished difference Result 2621 states and 3300 transitions. [2020-09-18 02:51:05,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-18 02:51:05,323 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 139 [2020-09-18 02:51:05,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:51:05,334 INFO L225 Difference]: With dead ends: 2621 [2020-09-18 02:51:05,334 INFO L226 Difference]: Without dead ends: 2621 [2020-09-18 02:51:05,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 211 SyntacticMatches, 32 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=218, Invalid=288, Unknown=0, NotChecked=0, Total=506 [2020-09-18 02:51:05,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2621 states. [2020-09-18 02:51:05,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2621 to 2575. [2020-09-18 02:51:05,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2575 states. [2020-09-18 02:51:05,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 3250 transitions. [2020-09-18 02:51:05,361 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 3250 transitions. Word has length 139 [2020-09-18 02:51:05,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:51:05,362 INFO L479 AbstractCegarLoop]: Abstraction has 2575 states and 3250 transitions. [2020-09-18 02:51:05,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-18 02:51:05,362 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 3250 transitions. [2020-09-18 02:51:05,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-09-18 02:51:05,367 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:51:05,367 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:51:05,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-18 02:51:05,582 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:51:05,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:51:05,582 INFO L82 PathProgramCache]: Analyzing trace with hash 277787967, now seen corresponding path program 25 times [2020-09-18 02:51:05,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:51:05,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681584491] [2020-09-18 02:51:05,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:51:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:51:06,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-18 02:51:06,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681584491] [2020-09-18 02:51:06,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371375867] [2020-09-18 02:51:06,152 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-18 02:51:06,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:51:06,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-18 02:51:06,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:51:06,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-18 02:51:06,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:51:06,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-18 02:51:06,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1502487846] [2020-09-18 02:51:06,318 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:51:06,382 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:51:06,938 INFO L274 McrAutomatonBuilder]: Finished intersection with 199 states and 254 transitions. [2020-09-18 02:51:06,939 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:51:07,821 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [92049#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0)), 92048#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-09-18 02:51:07,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-18 02:51:07,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:51:07,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-18 02:51:07,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=313, Unknown=0, NotChecked=0, Total=552 [2020-09-18 02:51:07,822 INFO L87 Difference]: Start difference. First operand 2575 states and 3250 transitions. Second operand 24 states. [2020-09-18 02:51:07,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:51:07,954 INFO L93 Difference]: Finished difference Result 2750 states and 3456 transitions. [2020-09-18 02:51:07,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-18 02:51:07,955 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 142 [2020-09-18 02:51:07,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:51:07,967 INFO L225 Difference]: With dead ends: 2750 [2020-09-18 02:51:07,967 INFO L226 Difference]: Without dead ends: 2750 [2020-09-18 02:51:07,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 218 SyntacticMatches, 34 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=239, Invalid=313, Unknown=0, NotChecked=0, Total=552 [2020-09-18 02:51:07,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2020-09-18 02:51:07,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 2704. [2020-09-18 02:51:07,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2704 states. [2020-09-18 02:51:07,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2704 states to 2704 states and 3406 transitions. [2020-09-18 02:51:07,997 INFO L78 Accepts]: Start accepts. Automaton has 2704 states and 3406 transitions. Word has length 142 [2020-09-18 02:51:07,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:51:07,997 INFO L479 AbstractCegarLoop]: Abstraction has 2704 states and 3406 transitions. [2020-09-18 02:51:07,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-18 02:51:07,998 INFO L276 IsEmpty]: Start isEmpty. Operand 2704 states and 3406 transitions. [2020-09-18 02:51:08,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-09-18 02:51:08,009 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:51:08,010 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:51:08,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-18 02:51:08,223 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:51:08,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:51:08,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1793796507, now seen corresponding path program 26 times [2020-09-18 02:51:08,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:51:08,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537956265] [2020-09-18 02:51:08,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:51:08,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:51:08,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-18 02:51:08,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537956265] [2020-09-18 02:51:08,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670574915] [2020-09-18 02:51:08,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-18 02:51:08,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-18 02:51:08,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-18 02:51:08,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-18 02:51:08,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:51:08,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-18 02:51:08,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:51:08,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-18 02:51:08,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [868771315] [2020-09-18 02:51:08,954 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:51:08,996 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:51:09,607 INFO L274 McrAutomatonBuilder]: Finished intersection with 205 states and 263 transitions. [2020-09-18 02:51:09,608 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:51:10,637 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [100663#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 100664#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-18 02:51:10,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-18 02:51:10,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:51:10,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-18 02:51:10,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=339, Unknown=0, NotChecked=0, Total=600 [2020-09-18 02:51:10,638 INFO L87 Difference]: Start difference. First operand 2704 states and 3406 transitions. Second operand 25 states. [2020-09-18 02:51:10,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:51:10,757 INFO L93 Difference]: Finished difference Result 2833 states and 3562 transitions. [2020-09-18 02:51:10,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-18 02:51:10,758 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 145 [2020-09-18 02:51:10,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:51:10,764 INFO L225 Difference]: With dead ends: 2833 [2020-09-18 02:51:10,764 INFO L226 Difference]: Without dead ends: 2833 [2020-09-18 02:51:10,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 225 SyntacticMatches, 36 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=261, Invalid=339, Unknown=0, NotChecked=0, Total=600 [2020-09-18 02:51:10,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2020-09-18 02:51:10,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 2833. [2020-09-18 02:51:10,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2833 states. [2020-09-18 02:51:10,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2833 states to 2833 states and 3562 transitions. [2020-09-18 02:51:10,798 INFO L78 Accepts]: Start accepts. Automaton has 2833 states and 3562 transitions. Word has length 145 [2020-09-18 02:51:10,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:51:10,799 INFO L479 AbstractCegarLoop]: Abstraction has 2833 states and 3562 transitions. [2020-09-18 02:51:10,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-18 02:51:10,799 INFO L276 IsEmpty]: Start isEmpty. Operand 2833 states and 3562 transitions. [2020-09-18 02:51:10,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-18 02:51:10,804 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:51:10,804 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:51:11,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-18 02:51:11,020 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:51:11,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:51:11,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1981785217, now seen corresponding path program 27 times [2020-09-18 02:51:11,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:51:11,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110840407] [2020-09-18 02:51:11,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:51:11,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:51:14,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-18 02:51:14,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110840407] [2020-09-18 02:51:14,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322066724] [2020-09-18 02:51:14,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-18 02:51:15,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-09-18 02:51:15,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-18 02:51:15,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-18 02:51:15,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:51:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-18 02:51:15,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:51:15,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-18 02:51:15,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [966925664] [2020-09-18 02:51:15,455 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:51:15,521 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:51:16,011 INFO L274 McrAutomatonBuilder]: Finished intersection with 211 states and 272 transitions. [2020-09-18 02:51:16,011 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:51:16,582 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-18 02:51:16,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-18 02:51:16,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:51:16,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-18 02:51:16,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-18 02:51:16,584 INFO L87 Difference]: Start difference. First operand 2833 states and 3562 transitions. Second operand 63 states. [2020-09-18 02:52:55,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:52:55,329 INFO L93 Difference]: Finished difference Result 32926 states and 45933 transitions. [2020-09-18 02:52:55,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 633 states. [2020-09-18 02:52:55,330 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-18 02:52:55,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:52:55,404 INFO L225 Difference]: With dead ends: 32926 [2020-09-18 02:52:55,404 INFO L226 Difference]: Without dead ends: 32924 [2020-09-18 02:52:55,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 265 SyntacticMatches, 6 SemanticMatches, 632 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162735 ImplicationChecksByTransitivity, 38.4s TimeCoverageRelationStatistics Valid=2407, Invalid=398915, Unknown=0, NotChecked=0, Total=401322 [2020-09-18 02:52:55,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32924 states. [2020-09-18 02:52:55,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32924 to 2967. [2020-09-18 02:52:55,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2967 states. [2020-09-18 02:52:55,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2967 states to 2967 states and 3794 transitions. [2020-09-18 02:52:55,705 INFO L78 Accepts]: Start accepts. Automaton has 2967 states and 3794 transitions. Word has length 148 [2020-09-18 02:52:55,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:52:55,706 INFO L479 AbstractCegarLoop]: Abstraction has 2967 states and 3794 transitions. [2020-09-18 02:52:55,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-18 02:52:55,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2967 states and 3794 transitions. [2020-09-18 02:52:55,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-18 02:52:55,711 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:52:55,711 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:52:55,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-18 02:52:55,924 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:52:55,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:52:55,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1970430061, now seen corresponding path program 28 times [2020-09-18 02:52:55,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:52:55,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080066680] [2020-09-18 02:52:55,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:52:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:52:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-18 02:52:59,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080066680] [2020-09-18 02:52:59,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749155534] [2020-09-18 02:52:59,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-18 02:53:02,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-18 02:53:02,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-18 02:53:02,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-18 02:53:02,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:53:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-18 02:53:02,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:53:02,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-18 02:53:02,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1902052437] [2020-09-18 02:53:02,237 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:53:02,282 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:53:02,801 INFO L274 McrAutomatonBuilder]: Finished intersection with 208 states and 266 transitions. [2020-09-18 02:53:02,802 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:53:03,397 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-18 02:53:03,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-18 02:53:03,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:53:03,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-18 02:53:03,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-18 02:53:03,398 INFO L87 Difference]: Start difference. First operand 2967 states and 3794 transitions. Second operand 63 states. [2020-09-18 02:54:46,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:54:46,694 INFO L93 Difference]: Finished difference Result 30945 states and 43173 transitions. [2020-09-18 02:54:46,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-09-18 02:54:46,696 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-18 02:54:46,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:54:46,737 INFO L225 Difference]: With dead ends: 30945 [2020-09-18 02:54:46,737 INFO L226 Difference]: Without dead ends: 30943 [2020-09-18 02:54:46,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 877 GetRequests, 259 SyntacticMatches, 6 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 40.1s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-09-18 02:54:46,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30943 states. [2020-09-18 02:54:46,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30943 to 2973. [2020-09-18 02:54:46,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2973 states. [2020-09-18 02:54:46,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 3801 transitions. [2020-09-18 02:54:46,940 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 3801 transitions. Word has length 148 [2020-09-18 02:54:46,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:54:46,941 INFO L479 AbstractCegarLoop]: Abstraction has 2973 states and 3801 transitions. [2020-09-18 02:54:46,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-18 02:54:46,941 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 3801 transitions. [2020-09-18 02:54:46,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-18 02:54:46,946 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:54:46,947 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:54:47,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-18 02:54:47,161 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:54:47,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:54:47,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1092472257, now seen corresponding path program 29 times [2020-09-18 02:54:47,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:54:47,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870702616] [2020-09-18 02:54:47,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:54:47,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:54:51,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-18 02:54:51,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870702616] [2020-09-18 02:54:51,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176345967] [2020-09-18 02:54:51,366 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-18 02:54:51,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-09-18 02:54:51,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-18 02:54:51,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-18 02:54:51,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:54:51,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-18 02:54:51,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:54:51,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-18 02:54:51,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [801181818] [2020-09-18 02:54:51,884 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:54:51,945 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:54:53,524 INFO L274 McrAutomatonBuilder]: Finished intersection with 205 states and 260 transitions. [2020-09-18 02:54:53,524 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:54:54,178 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-18 02:54:54,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-18 02:54:54,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:54:54,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-18 02:54:54,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-18 02:54:54,179 INFO L87 Difference]: Start difference. First operand 2973 states and 3801 transitions. Second operand 63 states. [2020-09-18 02:56:43,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:56:43,161 INFO L93 Difference]: Finished difference Result 30939 states and 43164 transitions. [2020-09-18 02:56:43,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-09-18 02:56:43,162 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-18 02:56:43,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:56:43,189 INFO L225 Difference]: With dead ends: 30939 [2020-09-18 02:56:43,189 INFO L226 Difference]: Without dead ends: 30937 [2020-09-18 02:56:43,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 871 GetRequests, 253 SyntacticMatches, 6 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 42.6s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-09-18 02:56:43,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30937 states. [2020-09-18 02:56:43,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30937 to 2979. [2020-09-18 02:56:43,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2979 states. [2020-09-18 02:56:43,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2979 states to 2979 states and 3808 transitions. [2020-09-18 02:56:43,371 INFO L78 Accepts]: Start accepts. Automaton has 2979 states and 3808 transitions. Word has length 148 [2020-09-18 02:56:43,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:56:43,372 INFO L479 AbstractCegarLoop]: Abstraction has 2979 states and 3808 transitions. [2020-09-18 02:56:43,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-18 02:56:43,372 INFO L276 IsEmpty]: Start isEmpty. Operand 2979 states and 3808 transitions. [2020-09-18 02:56:43,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-18 02:56:43,377 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:56:43,377 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:56:43,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-18 02:56:43,591 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:56:43,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:56:43,591 INFO L82 PathProgramCache]: Analyzing trace with hash 769524141, now seen corresponding path program 30 times [2020-09-18 02:56:43,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:56:43,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554135892] [2020-09-18 02:56:43,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:56:43,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:56:47,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-18 02:56:47,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554135892] [2020-09-18 02:56:47,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876134605] [2020-09-18 02:56:47,902 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-18 02:56:48,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-09-18 02:56:48,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-18 02:56:48,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-18 02:56:48,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:56:48,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-18 02:56:48,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:56:48,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-18 02:56:48,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [202664003] [2020-09-18 02:56:48,753 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:56:48,797 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:56:50,571 INFO L274 McrAutomatonBuilder]: Finished intersection with 202 states and 254 transitions. [2020-09-18 02:56:50,572 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:56:51,203 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-18 02:56:51,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-18 02:56:51,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:56:51,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-18 02:56:51,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-18 02:56:51,204 INFO L87 Difference]: Start difference. First operand 2979 states and 3808 transitions. Second operand 63 states. [2020-09-18 02:58:47,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:58:47,421 INFO L93 Difference]: Finished difference Result 30933 states and 43155 transitions. [2020-09-18 02:58:47,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-09-18 02:58:47,423 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-18 02:58:47,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:58:47,453 INFO L225 Difference]: With dead ends: 30933 [2020-09-18 02:58:47,454 INFO L226 Difference]: Without dead ends: 30931 [2020-09-18 02:58:47,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 865 GetRequests, 247 SyntacticMatches, 6 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 45.2s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-09-18 02:58:47,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30931 states. [2020-09-18 02:58:47,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30931 to 2985. [2020-09-18 02:58:47,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2985 states. [2020-09-18 02:58:47,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2985 states to 2985 states and 3815 transitions. [2020-09-18 02:58:47,637 INFO L78 Accepts]: Start accepts. Automaton has 2985 states and 3815 transitions. Word has length 148 [2020-09-18 02:58:47,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:58:47,638 INFO L479 AbstractCegarLoop]: Abstraction has 2985 states and 3815 transitions. [2020-09-18 02:58:47,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-18 02:58:47,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2985 states and 3815 transitions. [2020-09-18 02:58:47,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-18 02:58:47,644 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:58:47,644 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:58:47,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-18 02:58:47,857 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:58:47,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:58:47,858 INFO L82 PathProgramCache]: Analyzing trace with hash -188999425, now seen corresponding path program 31 times [2020-09-18 02:58:47,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:58:47,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733518913] [2020-09-18 02:58:47,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:58:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:58:52,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-18 02:58:52,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733518913] [2020-09-18 02:58:52,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162667371] [2020-09-18 02:58:52,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-18 02:58:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:58:52,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-18 02:58:52,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:58:52,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-18 02:58:52,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:58:52,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-18 02:58:52,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [13970279] [2020-09-18 02:58:52,738 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:58:52,782 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:58:53,254 INFO L274 McrAutomatonBuilder]: Finished intersection with 199 states and 248 transitions. [2020-09-18 02:58:53,254 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:58:53,885 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-18 02:58:53,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-18 02:58:53,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:58:53,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-18 02:58:53,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-18 02:58:53,886 INFO L87 Difference]: Start difference. First operand 2985 states and 3815 transitions. Second operand 63 states. [2020-09-18 02:59:16,986 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-09-18 03:00:54,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 03:00:54,715 INFO L93 Difference]: Finished difference Result 30927 states and 43146 transitions. [2020-09-18 03:00:54,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-09-18 03:00:54,716 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-18 03:00:54,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 03:00:54,743 INFO L225 Difference]: With dead ends: 30927 [2020-09-18 03:00:54,744 INFO L226 Difference]: Without dead ends: 30925 [2020-09-18 03:00:54,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 859 GetRequests, 241 SyntacticMatches, 6 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 47.1s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-09-18 03:00:54,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30925 states. [2020-09-18 03:00:54,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30925 to 2991. [2020-09-18 03:00:54,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2991 states. [2020-09-18 03:00:54,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 3822 transitions. [2020-09-18 03:00:54,902 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 3822 transitions. Word has length 148 [2020-09-18 03:00:54,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 03:00:54,903 INFO L479 AbstractCegarLoop]: Abstraction has 2991 states and 3822 transitions. [2020-09-18 03:00:54,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-18 03:00:54,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 3822 transitions. [2020-09-18 03:00:54,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-18 03:00:54,908 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 03:00:54,908 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 03:00:55,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-18 03:00:55,123 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 03:00:55,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 03:00:55,124 INFO L82 PathProgramCache]: Analyzing trace with hash 48993005, now seen corresponding path program 32 times [2020-09-18 03:00:55,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 03:00:55,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923601482] [2020-09-18 03:00:55,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 03:00:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 03:01:00,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-18 03:01:00,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923601482] [2020-09-18 03:01:00,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454326490] [2020-09-18 03:01:00,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-18 03:01:00,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-18 03:01:00,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-18 03:01:00,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-18 03:01:00,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 03:01:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-18 03:01:00,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 03:01:00,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-18 03:01:00,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1079971656] [2020-09-18 03:01:00,604 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 03:01:00,649 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 03:01:01,138 INFO L274 McrAutomatonBuilder]: Finished intersection with 196 states and 242 transitions. [2020-09-18 03:01:01,139 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 03:01:03,185 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-18 03:01:03,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-18 03:01:03,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 03:01:03,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-18 03:01:03,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-18 03:01:03,187 INFO L87 Difference]: Start difference. First operand 2991 states and 3822 transitions. Second operand 63 states.