/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/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-fae578e [2019-12-18 19:20:48,005 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-18 19:20:48,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-18 19:20:48,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-18 19:20:48,020 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-18 19:20:48,021 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-18 19:20:48,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-18 19:20:48,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-18 19:20:48,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-18 19:20:48,027 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-18 19:20:48,028 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-18 19:20:48,029 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-18 19:20:48,029 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-18 19:20:48,030 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-18 19:20:48,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-18 19:20:48,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-18 19:20:48,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-18 19:20:48,034 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-18 19:20:48,035 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-18 19:20:48,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-18 19:20:48,038 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-18 19:20:48,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-18 19:20:48,040 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-18 19:20:48,041 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-18 19:20:48,043 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-18 19:20:48,043 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-18 19:20:48,044 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-18 19:20:48,044 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-18 19:20:48,045 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-18 19:20:48,046 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-18 19:20:48,046 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-18 19:20:48,047 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-18 19:20:48,048 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-18 19:20:48,048 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-18 19:20:48,049 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-18 19:20:48,049 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-18 19:20:48,050 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-18 19:20:48,050 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-18 19:20:48,050 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-18 19:20:48,051 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-18 19:20:48,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-18 19:20:48,053 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf [2019-12-18 19:20:48,066 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-18 19:20:48,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-18 19:20:48,068 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-18 19:20:48,068 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-18 19:20:48,068 INFO L138 SettingsManager]: * Use SBE=true [2019-12-18 19:20:48,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-18 19:20:48,069 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-18 19:20:48,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-18 19:20:48,069 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-18 19:20:48,069 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-18 19:20:48,070 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-18 19:20:48,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-18 19:20:48,070 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-18 19:20:48,070 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-18 19:20:48,070 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-18 19:20:48,071 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-18 19:20:48,071 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-18 19:20:48,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-18 19:20:48,071 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-18 19:20:48,071 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-18 19:20:48,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-18 19:20:48,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-18 19:20:48,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-18 19:20:48,072 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-18 19:20:48,072 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-18 19:20:48,072 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-18 19:20:48,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-18 19:20:48,073 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-18 19:20:48,073 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-18 19:20:48,369 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-18 19:20:48,389 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-18 19:20:48,393 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-18 19:20:48,394 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-18 19:20:48,395 INFO L275 PluginConnector]: CDTParser initialized [2019-12-18 19:20:48,395 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2019-12-18 19:20:48,476 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e31a8330f/57ecbaafdbb44fd9b4c39a3a01470e80/FLAG98f3f1525 [2019-12-18 19:20:49,079 INFO L306 CDTParser]: Found 1 translation units. [2019-12-18 19:20:49,080 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2019-12-18 19:20:49,106 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e31a8330f/57ecbaafdbb44fd9b4c39a3a01470e80/FLAG98f3f1525 [2019-12-18 19:20:49,322 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e31a8330f/57ecbaafdbb44fd9b4c39a3a01470e80 [2019-12-18 19:20:49,336 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-18 19:20:49,338 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-18 19:20:49,339 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-18 19:20:49,339 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-18 19:20:49,344 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-18 19:20:49,348 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:20:49" (1/1) ... [2019-12-18 19:20:49,350 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f322d6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:20:49, skipping insertion in model container [2019-12-18 19:20:49,350 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:20:49" (1/1) ... [2019-12-18 19:20:49,361 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-18 19:20:49,427 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-18 19:20:50,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 19:20:50,043 INFO L203 MainTranslator]: Completed pre-run [2019-12-18 19:20:50,096 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 19:20:50,399 INFO L208 MainTranslator]: Completed translation [2019-12-18 19:20:50,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:20:50 WrapperNode [2019-12-18 19:20:50,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-18 19:20:50,402 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-18 19:20:50,402 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-18 19:20:50,402 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-18 19:20:50,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:20:50" (1/1) ... [2019-12-18 19:20:50,464 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:20:50" (1/1) ... [2019-12-18 19:20:50,527 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-18 19:20:50,529 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-18 19:20:50,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-18 19:20:50,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-18 19:20:50,545 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:20:50" (1/1) ... [2019-12-18 19:20:50,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:20:50" (1/1) ... [2019-12-18 19:20:50,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:20:50" (1/1) ... [2019-12-18 19:20:50,558 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:20:50" (1/1) ... [2019-12-18 19:20:50,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:20:50" (1/1) ... [2019-12-18 19:20:50,591 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:20:50" (1/1) ... [2019-12-18 19:20:50,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:20:50" (1/1) ... [2019-12-18 19:20:50,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-18 19:20:50,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-18 19:20:50,612 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-18 19:20:50,612 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-18 19:20:50,617 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:20:50" (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 [2019-12-18 19:20:50,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-18 19:20:50,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-18 19:20:50,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-18 19:20:50,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-18 19:20:50,712 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2019-12-18 19:20:50,713 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2019-12-18 19:20:50,713 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2019-12-18 19:20:50,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-12-18 19:20:50,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-18 19:20:50,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-18 19:20:50,716 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-18 19:20:51,384 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-18 19:20:51,385 INFO L287 CfgBuilder]: Removed 8 assume(true) statements. [2019-12-18 19:20:51,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:20:51 BoogieIcfgContainer [2019-12-18 19:20:51,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-18 19:20:51,388 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-18 19:20:51,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-18 19:20:51,393 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-18 19:20:51,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 07:20:49" (1/3) ... [2019-12-18 19:20:51,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44be425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:20:51, skipping insertion in model container [2019-12-18 19:20:51,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:20:50" (2/3) ... [2019-12-18 19:20:51,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44be425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:20:51, skipping insertion in model container [2019-12-18 19:20:51,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:20:51" (3/3) ... [2019-12-18 19:20:51,401 INFO L109 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2019-12-18 19:20:51,415 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-18 19:20:51,415 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-18 19:20:51,426 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-18 19:20:51,427 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-18 19:20:51,472 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:20:51,473 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:20:51,473 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:20:51,473 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:20:51,474 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:20:51,474 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:20:51,474 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:20:51,475 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:20:51,475 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:20:51,476 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:20:51,476 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:20:51,477 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:20:51,478 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:20:51,478 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:20:51,479 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:20:51,479 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:20:51,479 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:20:51,480 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:20:51,480 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:20:51,480 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:20:51,481 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:20:51,481 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:20:51,481 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:20:51,486 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:20:51,486 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:20:51,486 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:20:51,487 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:20:51,487 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:20:51,487 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:20:51,487 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:20:51,488 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:20:51,488 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:20:51,511 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-12-18 19:20:51,532 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-18 19:20:51,533 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-18 19:20:51,534 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-18 19:20:51,534 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-18 19:20:51,534 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-18 19:20:51,534 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-18 19:20:51,534 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-18 19:20:51,535 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-18 19:20:51,552 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 81 transitions [2019-12-18 19:20:51,554 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions [2019-12-18 19:20:51,619 INFO L126 PetriNetUnfolder]: 7/80 cut-off events. [2019-12-18 19:20:51,620 INFO L127 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-18 19:20:51,626 INFO L76 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 80 events. 7/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 79 event pairs. 6/78 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2019-12-18 19:20:51,633 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions [2019-12-18 19:20:51,667 INFO L126 PetriNetUnfolder]: 7/80 cut-off events. [2019-12-18 19:20:51,667 INFO L127 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-18 19:20:51,668 INFO L76 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 80 events. 7/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 79 event pairs. 6/78 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2019-12-18 19:20:51,670 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 646 [2019-12-18 19:20:51,672 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-18 19:20:53,870 WARN L192 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2019-12-18 19:20:54,049 WARN L192 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2019-12-18 19:20:54,613 WARN L192 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 110 [2019-12-18 19:20:54,863 WARN L192 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2019-12-18 19:20:54,870 INFO L206 etLargeBlockEncoding]: Checked pairs total: 738 [2019-12-18 19:20:54,870 INFO L214 etLargeBlockEncoding]: Total number of compositions: 68 [2019-12-18 19:20:54,874 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 17 transitions [2019-12-18 19:20:54,881 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-18 19:20:54,882 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-18 19:20:54,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-18 19:20:54,888 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:20:54,889 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:20:54,889 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:20:54,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:20:54,894 INFO L82 PathProgramCache]: Analyzing trace with hash 805989659, now seen corresponding path program 1 times [2019-12-18 19:20:54,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:20:54,901 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805632737] [2019-12-18 19:20:54,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:20:55,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:20:55,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:20:55,104 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805632737] [2019-12-18 19:20:55,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 19:20:55,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 19:20:55,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044355368] [2019-12-18 19:20:55,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-18 19:20:55,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:20:55,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-18 19:20:55,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 19:20:55,133 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-18 19:20:55,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:20:55,177 INFO L93 Difference]: Finished difference Result 52 states and 100 transitions. [2019-12-18 19:20:55,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-18 19:20:55,179 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-12-18 19:20:55,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:20:55,205 INFO L225 Difference]: With dead ends: 52 [2019-12-18 19:20:55,208 INFO L226 Difference]: Without dead ends: 52 [2019-12-18 19:20:55,210 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 19:20:55,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-12-18 19:20:55,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2019-12-18 19:20:55,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-18 19:20:55,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2019-12-18 19:20:55,259 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 8 [2019-12-18 19:20:55,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:20:55,260 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2019-12-18 19:20:55,260 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-18 19:20:55,260 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2019-12-18 19:20:55,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 19:20:55,262 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:20:55,262 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:20:55,262 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:20:55,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:20:55,263 INFO L82 PathProgramCache]: Analyzing trace with hash -627855235, now seen corresponding path program 1 times [2019-12-18 19:20:55,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:20:55,264 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282323371] [2019-12-18 19:20:55,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:20:55,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:20:55,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:20:55,368 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282323371] [2019-12-18 19:20:55,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 19:20:55,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 19:20:55,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608455712] [2019-12-18 19:20:55,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-18 19:20:55,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:20:55,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-18 19:20:55,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 19:20:55,373 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand 3 states. [2019-12-18 19:20:55,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:20:55,395 INFO L93 Difference]: Finished difference Result 64 states and 124 transitions. [2019-12-18 19:20:55,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-18 19:20:55,395 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-12-18 19:20:55,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:20:55,397 INFO L225 Difference]: With dead ends: 64 [2019-12-18 19:20:55,397 INFO L226 Difference]: Without dead ends: 64 [2019-12-18 19:20:55,398 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 19:20:55,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-12-18 19:20:55,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2019-12-18 19:20:55,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-12-18 19:20:55,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 88 transitions. [2019-12-18 19:20:55,405 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 88 transitions. Word has length 11 [2019-12-18 19:20:55,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:20:55,405 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 88 transitions. [2019-12-18 19:20:55,406 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-18 19:20:55,406 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 88 transitions. [2019-12-18 19:20:55,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-18 19:20:55,407 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:20:55,407 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:20:55,407 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:20:55,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:20:55,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1126061903, now seen corresponding path program 1 times [2019-12-18 19:20:55,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:20:55,408 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958990880] [2019-12-18 19:20:55,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:20:55,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:20:55,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:20:55,506 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958990880] [2019-12-18 19:20:55,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 19:20:55,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 19:20:55,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619752763] [2019-12-18 19:20:55,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-18 19:20:55,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:20:55,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-18 19:20:55,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 19:20:55,508 INFO L87 Difference]: Start difference. First operand 46 states and 88 transitions. Second operand 3 states. [2019-12-18 19:20:55,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:20:55,531 INFO L93 Difference]: Finished difference Result 40 states and 66 transitions. [2019-12-18 19:20:55,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-18 19:20:55,532 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-12-18 19:20:55,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:20:55,533 INFO L225 Difference]: With dead ends: 40 [2019-12-18 19:20:55,533 INFO L226 Difference]: Without dead ends: 40 [2019-12-18 19:20:55,533 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 19:20:55,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-12-18 19:20:55,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-12-18 19:20:55,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-18 19:20:55,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 66 transitions. [2019-12-18 19:20:55,538 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 66 transitions. Word has length 15 [2019-12-18 19:20:55,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:20:55,539 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 66 transitions. [2019-12-18 19:20:55,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-18 19:20:55,539 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 66 transitions. [2019-12-18 19:20:55,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-18 19:20:55,540 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:20:55,540 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:20:55,540 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:20:55,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:20:55,541 INFO L82 PathProgramCache]: Analyzing trace with hash -688630981, now seen corresponding path program 2 times [2019-12-18 19:20:55,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:20:55,541 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4906869] [2019-12-18 19:20:55,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:20:55,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:20:55,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:20:55,596 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4906869] [2019-12-18 19:20:55,597 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511090317] [2019-12-18 19:20:55,597 INFO L92 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 [2019-12-18 19:20:55,681 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:20:55,681 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:20:55,683 INFO L264 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-18 19:20:55,688 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:20:55,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:20:55,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:20:55,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-18 19:20:55,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322034148] [2019-12-18 19:20:55,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 19:20:55,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:20:55,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 19:20:55,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-18 19:20:55,709 INFO L87 Difference]: Start difference. First operand 40 states and 66 transitions. Second operand 5 states. [2019-12-18 19:20:55,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:20:55,732 INFO L93 Difference]: Finished difference Result 70 states and 112 transitions. [2019-12-18 19:20:55,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-18 19:20:55,732 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-12-18 19:20:55,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:20:55,733 INFO L225 Difference]: With dead ends: 70 [2019-12-18 19:20:55,733 INFO L226 Difference]: Without dead ends: 70 [2019-12-18 19:20:55,734 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-18 19:20:55,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-12-18 19:20:55,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 58. [2019-12-18 19:20:55,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-18 19:20:55,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 94 transitions. [2019-12-18 19:20:55,741 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 94 transitions. Word has length 15 [2019-12-18 19:20:55,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:20:55,741 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 94 transitions. [2019-12-18 19:20:55,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 19:20:55,742 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 94 transitions. [2019-12-18 19:20:55,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-18 19:20:55,743 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:20:55,743 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:20:55,946 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:20:55,946 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:20:55,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:20:55,947 INFO L82 PathProgramCache]: Analyzing trace with hash -181679987, now seen corresponding path program 3 times [2019-12-18 19:20:55,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:20:55,948 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956999750] [2019-12-18 19:20:55,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:20:55,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:20:56,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:20:56,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956999750] [2019-12-18 19:20:56,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708135381] [2019-12-18 19:20:56,012 INFO L92 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 [2019-12-18 19:20:56,092 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 19:20:56,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:20:56,093 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-18 19:20:56,095 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:20:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-18 19:20:56,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:20:56,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-12-18 19:20:56,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880926374] [2019-12-18 19:20:56,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-18 19:20:56,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:20:56,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-18 19:20:56,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-18 19:20:56,116 INFO L87 Difference]: Start difference. First operand 58 states and 94 transitions. Second operand 7 states. [2019-12-18 19:20:56,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:20:56,309 INFO L93 Difference]: Finished difference Result 130 states and 196 transitions. [2019-12-18 19:20:56,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 19:20:56,310 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-12-18 19:20:56,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:20:56,311 INFO L225 Difference]: With dead ends: 130 [2019-12-18 19:20:56,311 INFO L226 Difference]: Without dead ends: 130 [2019-12-18 19:20:56,311 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2019-12-18 19:20:56,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-12-18 19:20:56,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 103. [2019-12-18 19:20:56,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-18 19:20:56,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 159 transitions. [2019-12-18 19:20:56,321 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 159 transitions. Word has length 19 [2019-12-18 19:20:56,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:20:56,322 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 159 transitions. [2019-12-18 19:20:56,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-18 19:20:56,322 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 159 transitions. [2019-12-18 19:20:56,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-18 19:20:56,323 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:20:56,323 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:20:56,526 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:20:56,527 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:20:56,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:20:56,528 INFO L82 PathProgramCache]: Analyzing trace with hash 941314767, now seen corresponding path program 4 times [2019-12-18 19:20:56,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:20:56,529 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042143349] [2019-12-18 19:20:56,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:20:56,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:20:56,658 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-18 19:20:56,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042143349] [2019-12-18 19:20:56,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484445485] [2019-12-18 19:20:56,661 INFO L92 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 [2019-12-18 19:20:56,736 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:20:56,736 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:20:56,737 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-18 19:20:56,738 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:20:56,757 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-18 19:20:56,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:20:56,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-18 19:20:56,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171773770] [2019-12-18 19:20:56,758 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-18 19:20:56,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:20:56,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-18 19:20:56,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-12-18 19:20:56,759 INFO L87 Difference]: Start difference. First operand 103 states and 159 transitions. Second operand 7 states. [2019-12-18 19:20:56,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:20:56,794 INFO L93 Difference]: Finished difference Result 142 states and 215 transitions. [2019-12-18 19:20:56,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 19:20:56,796 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2019-12-18 19:20:56,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:20:56,797 INFO L225 Difference]: With dead ends: 142 [2019-12-18 19:20:56,797 INFO L226 Difference]: Without dead ends: 142 [2019-12-18 19:20:56,797 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-12-18 19:20:56,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-12-18 19:20:56,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 127. [2019-12-18 19:20:56,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-18 19:20:56,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 194 transitions. [2019-12-18 19:20:56,816 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 194 transitions. Word has length 26 [2019-12-18 19:20:56,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:20:56,817 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 194 transitions. [2019-12-18 19:20:56,817 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-18 19:20:56,817 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 194 transitions. [2019-12-18 19:20:56,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-18 19:20:56,821 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:20:56,821 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:20:57,021 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:20:57,022 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:20:57,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:20:57,023 INFO L82 PathProgramCache]: Analyzing trace with hash 760955681, now seen corresponding path program 5 times [2019-12-18 19:20:57,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:20:57,023 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171845847] [2019-12-18 19:20:57,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:20:57,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:20:57,120 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-18 19:20:57,120 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171845847] [2019-12-18 19:20:57,120 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153287206] [2019-12-18 19:20:57,121 INFO L92 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 [2019-12-18 19:20:57,188 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-18 19:20:57,188 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:20:57,189 INFO L264 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-18 19:20:57,190 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:20:57,201 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-18 19:20:57,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:20:57,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-18 19:20:57,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814554490] [2019-12-18 19:20:57,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 19:20:57,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:20:57,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 19:20:57,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-12-18 19:20:57,204 INFO L87 Difference]: Start difference. First operand 127 states and 194 transitions. Second operand 8 states. [2019-12-18 19:20:57,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:20:57,235 INFO L93 Difference]: Finished difference Result 166 states and 250 transitions. [2019-12-18 19:20:57,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 19:20:57,236 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2019-12-18 19:20:57,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:20:57,237 INFO L225 Difference]: With dead ends: 166 [2019-12-18 19:20:57,237 INFO L226 Difference]: Without dead ends: 166 [2019-12-18 19:20:57,238 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-12-18 19:20:57,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-18 19:20:57,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 151. [2019-12-18 19:20:57,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-18 19:20:57,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 229 transitions. [2019-12-18 19:20:57,249 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 229 transitions. Word has length 30 [2019-12-18 19:20:57,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:20:57,249 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 229 transitions. [2019-12-18 19:20:57,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 19:20:57,249 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 229 transitions. [2019-12-18 19:20:57,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-12-18 19:20:57,251 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:20:57,251 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:20:57,454 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:20:57,455 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:20:57,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:20:57,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1515799949, now seen corresponding path program 6 times [2019-12-18 19:20:57,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:20:57,456 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251826232] [2019-12-18 19:20:57,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:20:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:20:57,564 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-18 19:20:57,565 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251826232] [2019-12-18 19:20:57,565 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114356812] [2019-12-18 19:20:57,565 INFO L92 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 [2019-12-18 19:20:57,637 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-18 19:20:57,638 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:20:57,639 INFO L264 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-18 19:20:57,641 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:20:57,684 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-12-18 19:20:57,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:20:57,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-12-18 19:20:57,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033505180] [2019-12-18 19:20:57,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-18 19:20:57,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:20:57,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-18 19:20:57,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-12-18 19:20:57,687 INFO L87 Difference]: Start difference. First operand 151 states and 229 transitions. Second operand 11 states. [2019-12-18 19:20:58,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:20:58,055 INFO L93 Difference]: Finished difference Result 256 states and 368 transitions. [2019-12-18 19:20:58,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-18 19:20:58,056 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2019-12-18 19:20:58,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:20:58,057 INFO L225 Difference]: With dead ends: 256 [2019-12-18 19:20:58,057 INFO L226 Difference]: Without dead ends: 256 [2019-12-18 19:20:58,058 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2019-12-18 19:20:58,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2019-12-18 19:20:58,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 220. [2019-12-18 19:20:58,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2019-12-18 19:20:58,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 322 transitions. [2019-12-18 19:20:58,071 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 322 transitions. Word has length 34 [2019-12-18 19:20:58,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:20:58,072 INFO L462 AbstractCegarLoop]: Abstraction has 220 states and 322 transitions. [2019-12-18 19:20:58,072 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-18 19:20:58,072 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 322 transitions. [2019-12-18 19:20:58,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-12-18 19:20:58,074 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:20:58,074 INFO L411 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:20:58,281 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:20:58,281 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:20:58,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:20:58,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1789615391, now seen corresponding path program 7 times [2019-12-18 19:20:58,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:20:58,282 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265052890] [2019-12-18 19:20:58,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:20:58,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:20:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-18 19:20:58,382 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265052890] [2019-12-18 19:20:58,382 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218627029] [2019-12-18 19:20:58,382 INFO L92 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 [2019-12-18 19:20:58,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:20:58,494 INFO L264 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 19:20:58,495 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:20:58,508 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-18 19:20:58,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:20:58,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-18 19:20:58,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481835192] [2019-12-18 19:20:58,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 19:20:58,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:20:58,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 19:20:58,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-12-18 19:20:58,510 INFO L87 Difference]: Start difference. First operand 220 states and 322 transitions. Second operand 10 states. [2019-12-18 19:20:58,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:20:58,556 INFO L93 Difference]: Finished difference Result 268 states and 388 transitions. [2019-12-18 19:20:58,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 19:20:58,556 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2019-12-18 19:20:58,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:20:58,558 INFO L225 Difference]: With dead ends: 268 [2019-12-18 19:20:58,558 INFO L226 Difference]: Without dead ends: 268 [2019-12-18 19:20:58,559 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-12-18 19:20:58,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2019-12-18 19:20:58,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 250. [2019-12-18 19:20:58,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2019-12-18 19:20:58,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 364 transitions. [2019-12-18 19:20:58,568 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 364 transitions. Word has length 41 [2019-12-18 19:20:58,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:20:58,568 INFO L462 AbstractCegarLoop]: Abstraction has 250 states and 364 transitions. [2019-12-18 19:20:58,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 19:20:58,569 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 364 transitions. [2019-12-18 19:20:58,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-12-18 19:20:58,570 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:20:58,571 INFO L411 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:20:58,774 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:20:58,775 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:20:58,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:20:58,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1883668109, now seen corresponding path program 8 times [2019-12-18 19:20:58,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:20:58,776 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200107004] [2019-12-18 19:20:58,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:20:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:20:58,893 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 7 proven. 91 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-18 19:20:58,894 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200107004] [2019-12-18 19:20:58,894 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971223952] [2019-12-18 19:20:58,894 INFO L92 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 [2019-12-18 19:20:58,973 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:20:58,973 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:20:58,975 INFO L264 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 19:20:58,977 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:20:58,995 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 7 proven. 91 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-18 19:20:58,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:20:58,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-18 19:20:58,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633624367] [2019-12-18 19:20:58,997 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-18 19:20:58,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:20:58,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-18 19:20:58,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-12-18 19:20:58,997 INFO L87 Difference]: Start difference. First operand 250 states and 364 transitions. Second operand 11 states. [2019-12-18 19:20:59,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:20:59,045 INFO L93 Difference]: Finished difference Result 298 states and 430 transitions. [2019-12-18 19:20:59,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 19:20:59,045 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2019-12-18 19:20:59,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:20:59,048 INFO L225 Difference]: With dead ends: 298 [2019-12-18 19:20:59,048 INFO L226 Difference]: Without dead ends: 298 [2019-12-18 19:20:59,049 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-12-18 19:20:59,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2019-12-18 19:20:59,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 280. [2019-12-18 19:20:59,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2019-12-18 19:20:59,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 406 transitions. [2019-12-18 19:20:59,057 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 406 transitions. Word has length 45 [2019-12-18 19:20:59,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:20:59,057 INFO L462 AbstractCegarLoop]: Abstraction has 280 states and 406 transitions. [2019-12-18 19:20:59,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-18 19:20:59,057 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 406 transitions. [2019-12-18 19:20:59,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-12-18 19:20:59,058 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:20:59,059 INFO L411 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:20:59,262 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:20:59,263 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:20:59,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:20:59,263 INFO L82 PathProgramCache]: Analyzing trace with hash 125253883, now seen corresponding path program 9 times [2019-12-18 19:20:59,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:20:59,264 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532037372] [2019-12-18 19:20:59,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:20:59,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:20:59,406 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 7 proven. 120 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-18 19:20:59,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532037372] [2019-12-18 19:20:59,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868108089] [2019-12-18 19:20:59,407 INFO L92 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 [2019-12-18 19:20:59,501 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 19:20:59,502 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:20:59,503 INFO L264 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-18 19:20:59,505 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:20:59,575 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-12-18 19:20:59,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:20:59,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2019-12-18 19:20:59,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703242158] [2019-12-18 19:20:59,578 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-18 19:20:59,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:20:59,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-18 19:20:59,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2019-12-18 19:20:59,580 INFO L87 Difference]: Start difference. First operand 280 states and 406 transitions. Second operand 15 states. [2019-12-18 19:21:00,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:21:00,420 INFO L93 Difference]: Finished difference Result 418 states and 582 transitions. [2019-12-18 19:21:00,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-12-18 19:21:00,421 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2019-12-18 19:21:00,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:21:00,423 INFO L225 Difference]: With dead ends: 418 [2019-12-18 19:21:00,424 INFO L226 Difference]: Without dead ends: 418 [2019-12-18 19:21:00,425 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=825, Invalid=1725, Unknown=0, NotChecked=0, Total=2550 [2019-12-18 19:21:00,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2019-12-18 19:21:00,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 373. [2019-12-18 19:21:00,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2019-12-18 19:21:00,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 527 transitions. [2019-12-18 19:21:00,435 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 527 transitions. Word has length 49 [2019-12-18 19:21:00,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:21:00,436 INFO L462 AbstractCegarLoop]: Abstraction has 373 states and 527 transitions. [2019-12-18 19:21:00,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-18 19:21:00,436 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 527 transitions. [2019-12-18 19:21:00,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-12-18 19:21:00,437 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:21:00,438 INFO L411 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:21:00,650 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:21:00,650 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:21:00,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:21:00,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1053149445, now seen corresponding path program 10 times [2019-12-18 19:21:00,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:21:00,651 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579045608] [2019-12-18 19:21:00,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:21:00,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:21:00,769 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 10 proven. 153 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-12-18 19:21:00,770 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579045608] [2019-12-18 19:21:00,770 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761839800] [2019-12-18 19:21:00,770 INFO L92 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 [2019-12-18 19:21:00,885 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:21:00,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:21:00,887 INFO L264 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:21:00,890 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:21:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 10 proven. 153 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-12-18 19:21:00,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:21:00,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-18 19:21:00,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873187817] [2019-12-18 19:21:00,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-18 19:21:00,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:21:00,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-18 19:21:00,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-12-18 19:21:00,911 INFO L87 Difference]: Start difference. First operand 373 states and 527 transitions. Second operand 13 states. [2019-12-18 19:21:00,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:21:00,967 INFO L93 Difference]: Finished difference Result 430 states and 603 transitions. [2019-12-18 19:21:00,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 19:21:00,968 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2019-12-18 19:21:00,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:21:00,971 INFO L225 Difference]: With dead ends: 430 [2019-12-18 19:21:00,971 INFO L226 Difference]: Without dead ends: 430 [2019-12-18 19:21:00,971 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-12-18 19:21:00,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2019-12-18 19:21:00,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 409. [2019-12-18 19:21:00,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2019-12-18 19:21:00,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 576 transitions. [2019-12-18 19:21:00,981 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 576 transitions. Word has length 56 [2019-12-18 19:21:00,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:21:00,982 INFO L462 AbstractCegarLoop]: Abstraction has 409 states and 576 transitions. [2019-12-18 19:21:00,982 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-18 19:21:00,982 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 576 transitions. [2019-12-18 19:21:00,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-12-18 19:21:00,984 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:21:00,984 INFO L411 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:21:01,187 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:21:01,188 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:21:01,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:21:01,189 INFO L82 PathProgramCache]: Analyzing trace with hash 746998733, now seen corresponding path program 11 times [2019-12-18 19:21:01,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:21:01,189 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575549399] [2019-12-18 19:21:01,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:21:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:21:01,351 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 10 proven. 190 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-12-18 19:21:01,352 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575549399] [2019-12-18 19:21:01,352 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828266297] [2019-12-18 19:21:01,352 INFO L92 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 [2019-12-18 19:21:01,443 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-12-18 19:21:01,443 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:21:01,444 INFO L264 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:21:01,446 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:21:01,466 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 10 proven. 190 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-12-18 19:21:01,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:21:01,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-12-18 19:21:01,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792388589] [2019-12-18 19:21:01,467 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:21:01,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:21:01,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:21:01,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:21:01,468 INFO L87 Difference]: Start difference. First operand 409 states and 576 transitions. Second operand 14 states. [2019-12-18 19:21:01,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:21:01,554 INFO L93 Difference]: Finished difference Result 466 states and 652 transitions. [2019-12-18 19:21:01,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 19:21:01,557 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2019-12-18 19:21:01,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:21:01,560 INFO L225 Difference]: With dead ends: 466 [2019-12-18 19:21:01,560 INFO L226 Difference]: Without dead ends: 466 [2019-12-18 19:21:01,561 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:21:01,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2019-12-18 19:21:01,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 445. [2019-12-18 19:21:01,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2019-12-18 19:21:01,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 625 transitions. [2019-12-18 19:21:01,571 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 625 transitions. Word has length 60 [2019-12-18 19:21:01,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:21:01,571 INFO L462 AbstractCegarLoop]: Abstraction has 445 states and 625 transitions. [2019-12-18 19:21:01,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:21:01,571 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 625 transitions. [2019-12-18 19:21:01,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-12-18 19:21:01,573 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:21:01,573 INFO L411 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:21:01,783 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:21:01,784 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:21:01,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:21:01,784 INFO L82 PathProgramCache]: Analyzing trace with hash 926394271, now seen corresponding path program 12 times [2019-12-18 19:21:01,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:21:01,785 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137567819] [2019-12-18 19:21:01,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:21:01,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:21:01,928 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 10 proven. 231 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-12-18 19:21:01,928 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137567819] [2019-12-18 19:21:01,928 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720189127] [2019-12-18 19:21:01,929 INFO L92 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 [2019-12-18 19:21:02,046 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-12-18 19:21:02,046 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:21:02,048 INFO L264 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-18 19:21:02,049 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:21:02,117 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-12-18 19:21:02,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:21:02,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-12-18 19:21:02,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125085590] [2019-12-18 19:21:02,119 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-18 19:21:02,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:21:02,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-18 19:21:02,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-12-18 19:21:02,119 INFO L87 Difference]: Start difference. First operand 445 states and 625 transitions. Second operand 19 states. [2019-12-18 19:21:03,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:21:03,690 INFO L93 Difference]: Finished difference Result 616 states and 838 transitions. [2019-12-18 19:21:03,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-12-18 19:21:03,691 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 64 [2019-12-18 19:21:03,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:21:03,693 INFO L225 Difference]: With dead ends: 616 [2019-12-18 19:21:03,694 INFO L226 Difference]: Without dead ends: 616 [2019-12-18 19:21:03,696 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1825 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1911, Invalid=4251, Unknown=0, NotChecked=0, Total=6162 [2019-12-18 19:21:03,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2019-12-18 19:21:03,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 562. [2019-12-18 19:21:03,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 562 states. [2019-12-18 19:21:03,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 774 transitions. [2019-12-18 19:21:03,708 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 774 transitions. Word has length 64 [2019-12-18 19:21:03,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:21:03,709 INFO L462 AbstractCegarLoop]: Abstraction has 562 states and 774 transitions. [2019-12-18 19:21:03,709 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-18 19:21:03,709 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 774 transitions. [2019-12-18 19:21:03,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-12-18 19:21:03,710 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:21:03,710 INFO L411 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:21:03,914 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:21:03,915 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:21:03,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:21:03,915 INFO L82 PathProgramCache]: Analyzing trace with hash 2037603315, now seen corresponding path program 13 times [2019-12-18 19:21:03,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:21:03,916 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245645853] [2019-12-18 19:21:03,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:21:03,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:21:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 13 proven. 276 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-12-18 19:21:04,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245645853] [2019-12-18 19:21:04,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790215522] [2019-12-18 19:21:04,077 INFO L92 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 [2019-12-18 19:21:04,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:21:04,172 INFO L264 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 19:21:04,175 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:21:04,204 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 13 proven. 276 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-12-18 19:21:04,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:21:04,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-12-18 19:21:04,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739062900] [2019-12-18 19:21:04,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:21:04,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:21:04,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:21:04,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:21:04,207 INFO L87 Difference]: Start difference. First operand 562 states and 774 transitions. Second operand 16 states. [2019-12-18 19:21:04,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:21:04,269 INFO L93 Difference]: Finished difference Result 628 states and 860 transitions. [2019-12-18 19:21:04,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 19:21:04,270 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2019-12-18 19:21:04,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:21:04,272 INFO L225 Difference]: With dead ends: 628 [2019-12-18 19:21:04,272 INFO L226 Difference]: Without dead ends: 628 [2019-12-18 19:21:04,272 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:21:04,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2019-12-18 19:21:04,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 604. [2019-12-18 19:21:04,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 604 states. [2019-12-18 19:21:04,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 830 transitions. [2019-12-18 19:21:04,284 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 830 transitions. Word has length 71 [2019-12-18 19:21:04,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:21:04,284 INFO L462 AbstractCegarLoop]: Abstraction has 604 states and 830 transitions. [2019-12-18 19:21:04,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:21:04,285 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 830 transitions. [2019-12-18 19:21:04,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-12-18 19:21:04,286 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:21:04,286 INFO L411 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:21:04,490 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:21:04,491 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:21:04,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:21:04,491 INFO L82 PathProgramCache]: Analyzing trace with hash -73086751, now seen corresponding path program 14 times [2019-12-18 19:21:04,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:21:04,492 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137540866] [2019-12-18 19:21:04,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:21:04,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:21:04,733 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 13 proven. 325 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-12-18 19:21:04,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137540866] [2019-12-18 19:21:04,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819520148] [2019-12-18 19:21:04,734 INFO L92 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 [2019-12-18 19:21:04,878 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:21:04,879 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:21:04,881 INFO L264 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-18 19:21:04,883 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:21:04,918 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 13 proven. 325 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-12-18 19:21:04,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:21:04,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-12-18 19:21:04,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423342790] [2019-12-18 19:21:04,920 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-18 19:21:04,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:21:04,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-18 19:21:04,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-12-18 19:21:04,921 INFO L87 Difference]: Start difference. First operand 604 states and 830 transitions. Second operand 17 states. [2019-12-18 19:21:05,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:21:05,010 INFO L93 Difference]: Finished difference Result 670 states and 916 transitions. [2019-12-18 19:21:05,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 19:21:05,011 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 75 [2019-12-18 19:21:05,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:21:05,015 INFO L225 Difference]: With dead ends: 670 [2019-12-18 19:21:05,015 INFO L226 Difference]: Without dead ends: 670 [2019-12-18 19:21:05,016 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-12-18 19:21:05,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2019-12-18 19:21:05,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 646. [2019-12-18 19:21:05,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 646 states. [2019-12-18 19:21:05,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 886 transitions. [2019-12-18 19:21:05,036 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 886 transitions. Word has length 75 [2019-12-18 19:21:05,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:21:05,036 INFO L462 AbstractCegarLoop]: Abstraction has 646 states and 886 transitions. [2019-12-18 19:21:05,037 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-18 19:21:05,037 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 886 transitions. [2019-12-18 19:21:05,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-12-18 19:21:05,040 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:21:05,040 INFO L411 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:21:05,253 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:21:05,254 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:21:05,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:21:05,254 INFO L82 PathProgramCache]: Analyzing trace with hash -61206833, now seen corresponding path program 15 times [2019-12-18 19:21:05,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:21:05,255 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469644488] [2019-12-18 19:21:05,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:21:05,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:21:05,606 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 13 proven. 378 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-12-18 19:21:05,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469644488] [2019-12-18 19:21:05,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781828895] [2019-12-18 19:21:05,607 INFO L92 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 [2019-12-18 19:21:05,714 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-18 19:21:05,715 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:21:05,716 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 19:21:05,717 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:21:05,820 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2019-12-18 19:21:05,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:21:05,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 23 [2019-12-18 19:21:05,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218501031] [2019-12-18 19:21:05,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-18 19:21:05,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:21:05,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-18 19:21:05,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2019-12-18 19:21:05,826 INFO L87 Difference]: Start difference. First operand 646 states and 886 transitions. Second operand 23 states. [2019-12-18 19:21:08,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:21:08,687 INFO L93 Difference]: Finished difference Result 850 states and 1136 transitions. [2019-12-18 19:21:08,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2019-12-18 19:21:08,688 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 79 [2019-12-18 19:21:08,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:21:08,691 INFO L225 Difference]: With dead ends: 850 [2019-12-18 19:21:08,692 INFO L226 Difference]: Without dead ends: 850 [2019-12-18 19:21:08,695 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4089 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3808, Invalid=8848, Unknown=0, NotChecked=0, Total=12656 [2019-12-18 19:21:08,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2019-12-18 19:21:08,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 787. [2019-12-18 19:21:08,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 787 states. [2019-12-18 19:21:08,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1063 transitions. [2019-12-18 19:21:08,711 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1063 transitions. Word has length 79 [2019-12-18 19:21:08,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:21:08,711 INFO L462 AbstractCegarLoop]: Abstraction has 787 states and 1063 transitions. [2019-12-18 19:21:08,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-18 19:21:08,712 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1063 transitions. [2019-12-18 19:21:08,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-12-18 19:21:08,714 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:21:08,714 INFO L411 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:21:08,923 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:21:08,923 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:21:08,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:21:08,924 INFO L82 PathProgramCache]: Analyzing trace with hash 943400231, now seen corresponding path program 16 times [2019-12-18 19:21:08,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:21:08,925 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460464155] [2019-12-18 19:21:08,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:21:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:21:09,156 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 16 proven. 435 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-12-18 19:21:09,157 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460464155] [2019-12-18 19:21:09,157 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539861263] [2019-12-18 19:21:09,157 INFO L92 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 [2019-12-18 19:21:09,414 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:21:09,414 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:21:09,416 INFO L264 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-18 19:21:09,418 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:21:09,437 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 16 proven. 435 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-12-18 19:21:09,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:21:09,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-12-18 19:21:09,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312137622] [2019-12-18 19:21:09,438 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-18 19:21:09,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:21:09,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-18 19:21:09,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-12-18 19:21:09,439 INFO L87 Difference]: Start difference. First operand 787 states and 1063 transitions. Second operand 19 states. [2019-12-18 19:21:09,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:21:09,523 INFO L93 Difference]: Finished difference Result 862 states and 1159 transitions. [2019-12-18 19:21:09,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 19:21:09,523 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 86 [2019-12-18 19:21:09,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:21:09,527 INFO L225 Difference]: With dead ends: 862 [2019-12-18 19:21:09,527 INFO L226 Difference]: Without dead ends: 862 [2019-12-18 19:21:09,528 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-12-18 19:21:09,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2019-12-18 19:21:09,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 835. [2019-12-18 19:21:09,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 835 states. [2019-12-18 19:21:09,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1126 transitions. [2019-12-18 19:21:09,548 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1126 transitions. Word has length 86 [2019-12-18 19:21:09,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:21:09,548 INFO L462 AbstractCegarLoop]: Abstraction has 835 states and 1126 transitions. [2019-12-18 19:21:09,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-18 19:21:09,549 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1126 transitions. [2019-12-18 19:21:09,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-12-18 19:21:09,551 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:21:09,552 INFO L411 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:21:09,756 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:21:09,756 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:21:09,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:21:09,757 INFO L82 PathProgramCache]: Analyzing trace with hash 757104249, now seen corresponding path program 17 times [2019-12-18 19:21:09,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:21:09,757 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079553245] [2019-12-18 19:21:09,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:21:09,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:21:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 16 proven. 496 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-12-18 19:21:10,020 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079553245] [2019-12-18 19:21:10,020 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495570873] [2019-12-18 19:21:10,020 INFO L92 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 [2019-12-18 19:21:10,146 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-12-18 19:21:10,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:21:10,148 INFO L264 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-18 19:21:10,150 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:21:10,169 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 16 proven. 496 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-12-18 19:21:10,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:21:10,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-12-18 19:21:10,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929783229] [2019-12-18 19:21:10,170 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 19:21:10,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:21:10,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 19:21:10,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-12-18 19:21:10,171 INFO L87 Difference]: Start difference. First operand 835 states and 1126 transitions. Second operand 20 states. [2019-12-18 19:21:10,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:21:10,272 INFO L93 Difference]: Finished difference Result 910 states and 1222 transitions. [2019-12-18 19:21:10,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 19:21:10,273 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 90 [2019-12-18 19:21:10,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:21:10,277 INFO L225 Difference]: With dead ends: 910 [2019-12-18 19:21:10,277 INFO L226 Difference]: Without dead ends: 910 [2019-12-18 19:21:10,277 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-12-18 19:21:10,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2019-12-18 19:21:10,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 883. [2019-12-18 19:21:10,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2019-12-18 19:21:10,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1189 transitions. [2019-12-18 19:21:10,293 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1189 transitions. Word has length 90 [2019-12-18 19:21:10,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:21:10,294 INFO L462 AbstractCegarLoop]: Abstraction has 883 states and 1189 transitions. [2019-12-18 19:21:10,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 19:21:10,294 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1189 transitions. [2019-12-18 19:21:10,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-12-18 19:21:10,297 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:21:10,297 INFO L411 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:21:10,509 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:21:10,509 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:21:10,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:21:10,510 INFO L82 PathProgramCache]: Analyzing trace with hash 305454795, now seen corresponding path program 18 times [2019-12-18 19:21:10,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:21:10,511 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118216109] [2019-12-18 19:21:10,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:21:10,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:21:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 16 proven. 561 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-12-18 19:21:10,923 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118216109] [2019-12-18 19:21:10,923 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597109328] [2019-12-18 19:21:10,923 INFO L92 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 [2019-12-18 19:21:11,206 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-12-18 19:21:11,207 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:21:11,209 INFO L264 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 19:21:11,212 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:21:11,362 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2019-12-18 19:21:11,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:21:11,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9] total 27 [2019-12-18 19:21:11,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63327273] [2019-12-18 19:21:11,363 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-12-18 19:21:11,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:21:11,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-12-18 19:21:11,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2019-12-18 19:21:11,364 INFO L87 Difference]: Start difference. First operand 883 states and 1189 transitions. Second operand 27 states. [2019-12-18 19:21:15,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:21:15,748 INFO L93 Difference]: Finished difference Result 1120 states and 1476 transitions. [2019-12-18 19:21:15,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2019-12-18 19:21:15,754 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 94 [2019-12-18 19:21:15,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:21:15,759 INFO L225 Difference]: With dead ends: 1120 [2019-12-18 19:21:15,759 INFO L226 Difference]: Without dead ends: 1120 [2019-12-18 19:21:15,765 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7994 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=6840, Invalid=16416, Unknown=0, NotChecked=0, Total=23256 [2019-12-18 19:21:15,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2019-12-18 19:21:15,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1048. [2019-12-18 19:21:15,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1048 states. [2019-12-18 19:21:15,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1394 transitions. [2019-12-18 19:21:15,783 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1394 transitions. Word has length 94 [2019-12-18 19:21:15,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:21:15,783 INFO L462 AbstractCegarLoop]: Abstraction has 1048 states and 1394 transitions. [2019-12-18 19:21:15,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-12-18 19:21:15,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1394 transitions. [2019-12-18 19:21:15,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-12-18 19:21:15,787 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:21:15,787 INFO L411 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:21:15,991 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:21:15,991 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:21:15,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:21:15,992 INFO L82 PathProgramCache]: Analyzing trace with hash 804368583, now seen corresponding path program 19 times [2019-12-18 19:21:15,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:21:15,992 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508851940] [2019-12-18 19:21:15,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:21:16,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:21:16,260 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 19 proven. 630 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-12-18 19:21:16,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508851940] [2019-12-18 19:21:16,261 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799884397] [2019-12-18 19:21:16,261 INFO L92 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 [2019-12-18 19:21:16,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:21:16,379 INFO L264 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-18 19:21:16,382 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:21:16,424 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 19 proven. 630 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-12-18 19:21:16,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:21:16,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-12-18 19:21:16,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369761034] [2019-12-18 19:21:16,427 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-18 19:21:16,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:21:16,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-18 19:21:16,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-12-18 19:21:16,428 INFO L87 Difference]: Start difference. First operand 1048 states and 1394 transitions. Second operand 22 states. [2019-12-18 19:21:16,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:21:16,522 INFO L93 Difference]: Finished difference Result 1132 states and 1500 transitions. [2019-12-18 19:21:16,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 19:21:16,523 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 101 [2019-12-18 19:21:16,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:21:16,527 INFO L225 Difference]: With dead ends: 1132 [2019-12-18 19:21:16,527 INFO L226 Difference]: Without dead ends: 1132 [2019-12-18 19:21:16,528 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-12-18 19:21:16,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2019-12-18 19:21:16,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 1102. [2019-12-18 19:21:16,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1102 states. [2019-12-18 19:21:16,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1464 transitions. [2019-12-18 19:21:16,549 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1464 transitions. Word has length 101 [2019-12-18 19:21:16,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:21:16,550 INFO L462 AbstractCegarLoop]: Abstraction has 1102 states and 1464 transitions. [2019-12-18 19:21:16,550 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-18 19:21:16,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1464 transitions. [2019-12-18 19:21:16,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-12-18 19:21:16,553 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:21:16,553 INFO L411 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:21:16,758 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:21:16,759 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:21:16,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:21:16,759 INFO L82 PathProgramCache]: Analyzing trace with hash 726157621, now seen corresponding path program 20 times [2019-12-18 19:21:16,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:21:16,759 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061856555] [2019-12-18 19:21:16,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:21:16,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:21:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 19 proven. 703 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-12-18 19:21:17,062 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061856555] [2019-12-18 19:21:17,062 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335239257] [2019-12-18 19:21:17,062 INFO L92 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 [2019-12-18 19:21:17,166 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:21:17,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:21:17,168 INFO L264 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-18 19:21:17,171 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:21:17,192 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 19 proven. 703 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-12-18 19:21:17,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:21:17,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-12-18 19:21:17,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489121618] [2019-12-18 19:21:17,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-18 19:21:17,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:21:17,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-18 19:21:17,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-12-18 19:21:17,194 INFO L87 Difference]: Start difference. First operand 1102 states and 1464 transitions. Second operand 23 states. [2019-12-18 19:21:17,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:21:17,272 INFO L93 Difference]: Finished difference Result 1156 states and 1534 transitions. [2019-12-18 19:21:17,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 19:21:17,272 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 105 [2019-12-18 19:21:17,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:21:17,277 INFO L225 Difference]: With dead ends: 1156 [2019-12-18 19:21:17,277 INFO L226 Difference]: Without dead ends: 1156 [2019-12-18 19:21:17,277 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-12-18 19:21:17,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2019-12-18 19:21:17,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 1156. [2019-12-18 19:21:17,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1156 states. [2019-12-18 19:21:17,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1534 transitions. [2019-12-18 19:21:17,296 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1534 transitions. Word has length 105 [2019-12-18 19:21:17,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:21:17,297 INFO L462 AbstractCegarLoop]: Abstraction has 1156 states and 1534 transitions. [2019-12-18 19:21:17,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-18 19:21:17,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1534 transitions. [2019-12-18 19:21:17,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-12-18 19:21:17,300 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:21:17,300 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:21:17,512 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:21:17,512 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:21:17,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:21:17,513 INFO L82 PathProgramCache]: Analyzing trace with hash -274662749, now seen corresponding path program 21 times [2019-12-18 19:21:17,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:21:17,513 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056889654] [2019-12-18 19:21:17,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:21:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:21:17,646 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 19:21:17,649 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056889654] [2019-12-18 19:21:17,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852766556] [2019-12-18 19:21:17,650 INFO L92 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 [2019-12-18 19:21:17,879 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-12-18 19:21:17,879 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:21:17,881 INFO L264 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 19:21:17,884 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:21:17,919 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 19:21:17,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:21:17,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-18 19:21:17,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013077074] [2019-12-18 19:21:17,920 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-18 19:21:17,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:21:17,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-18 19:21:17,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-12-18 19:21:17,921 INFO L87 Difference]: Start difference. First operand 1156 states and 1534 transitions. Second operand 11 states. [2019-12-18 19:21:17,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:21:17,984 INFO L93 Difference]: Finished difference Result 1331 states and 1740 transitions. [2019-12-18 19:21:17,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 19:21:17,984 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 109 [2019-12-18 19:21:17,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:21:17,990 INFO L225 Difference]: With dead ends: 1331 [2019-12-18 19:21:17,990 INFO L226 Difference]: Without dead ends: 1331 [2019-12-18 19:21:17,990 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-12-18 19:21:17,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2019-12-18 19:21:18,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1285. [2019-12-18 19:21:18,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1285 states. [2019-12-18 19:21:18,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 1690 transitions. [2019-12-18 19:21:18,011 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 1690 transitions. Word has length 109 [2019-12-18 19:21:18,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:21:18,011 INFO L462 AbstractCegarLoop]: Abstraction has 1285 states and 1690 transitions. [2019-12-18 19:21:18,011 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-18 19:21:18,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 1690 transitions. [2019-12-18 19:21:18,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-12-18 19:21:18,015 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:21:18,016 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:21:18,219 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:21:18,220 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:21:18,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:21:18,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1538398591, now seen corresponding path program 22 times [2019-12-18 19:21:18,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:21:18,221 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479945488] [2019-12-18 19:21:18,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:21:18,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:21:18,359 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 19:21:18,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479945488] [2019-12-18 19:21:18,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399448316] [2019-12-18 19:21:18,359 INFO L92 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 [2019-12-18 19:21:18,880 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:21:18,880 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:21:18,883 INFO L264 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:21:18,885 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:21:18,910 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 19:21:18,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:21:18,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-18 19:21:18,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189015568] [2019-12-18 19:21:18,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 19:21:18,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:21:18,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 19:21:18,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-12-18 19:21:18,913 INFO L87 Difference]: Start difference. First operand 1285 states and 1690 transitions. Second operand 12 states. [2019-12-18 19:21:18,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:21:18,994 INFO L93 Difference]: Finished difference Result 1460 states and 1896 transitions. [2019-12-18 19:21:18,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 19:21:18,995 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 112 [2019-12-18 19:21:18,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:21:19,000 INFO L225 Difference]: With dead ends: 1460 [2019-12-18 19:21:19,001 INFO L226 Difference]: Without dead ends: 1460 [2019-12-18 19:21:19,001 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-12-18 19:21:19,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2019-12-18 19:21:19,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1414. [2019-12-18 19:21:19,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1414 states. [2019-12-18 19:21:19,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 1846 transitions. [2019-12-18 19:21:19,023 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 1846 transitions. Word has length 112 [2019-12-18 19:21:19,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:21:19,025 INFO L462 AbstractCegarLoop]: Abstraction has 1414 states and 1846 transitions. [2019-12-18 19:21:19,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 19:21:19,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 1846 transitions. [2019-12-18 19:21:19,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-12-18 19:21:19,029 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:21:19,030 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:21:19,235 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:21:19,235 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:21:19,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:21:19,236 INFO L82 PathProgramCache]: Analyzing trace with hash 190449123, now seen corresponding path program 23 times [2019-12-18 19:21:19,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:21:19,236 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331872612] [2019-12-18 19:21:19,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:21:19,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:21:19,407 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 19:21:19,408 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331872612] [2019-12-18 19:21:19,408 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326440310] [2019-12-18 19:21:19,408 INFO L92 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 [2019-12-18 19:21:19,683 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-12-18 19:21:19,683 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:21:19,687 INFO L264 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:21:19,689 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:21:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 19:21:19,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:21:19,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-18 19:21:19,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974273110] [2019-12-18 19:21:19,723 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-18 19:21:19,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:21:19,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-18 19:21:19,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-12-18 19:21:19,724 INFO L87 Difference]: Start difference. First operand 1414 states and 1846 transitions. Second operand 13 states. [2019-12-18 19:21:19,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:21:19,793 INFO L93 Difference]: Finished difference Result 1589 states and 2052 transitions. [2019-12-18 19:21:19,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 19:21:19,793 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 115 [2019-12-18 19:21:19,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:21:19,801 INFO L225 Difference]: With dead ends: 1589 [2019-12-18 19:21:19,802 INFO L226 Difference]: Without dead ends: 1589 [2019-12-18 19:21:19,802 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-12-18 19:21:19,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2019-12-18 19:21:19,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1543. [2019-12-18 19:21:19,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2019-12-18 19:21:19,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2002 transitions. [2019-12-18 19:21:19,826 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2002 transitions. Word has length 115 [2019-12-18 19:21:19,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:21:19,827 INFO L462 AbstractCegarLoop]: Abstraction has 1543 states and 2002 transitions. [2019-12-18 19:21:19,827 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-18 19:21:19,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2002 transitions. [2019-12-18 19:21:19,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-12-18 19:21:19,832 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:21:19,832 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:21:20,037 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:21:20,037 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:21:20,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:21:20,038 INFO L82 PathProgramCache]: Analyzing trace with hash -955116735, now seen corresponding path program 24 times [2019-12-18 19:21:20,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:21:20,040 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321984882] [2019-12-18 19:21:20,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:21:20,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:21:20,207 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 19:21:20,208 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321984882] [2019-12-18 19:21:20,208 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037780677] [2019-12-18 19:21:20,208 INFO L92 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 [2019-12-18 19:21:20,514 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-12-18 19:21:20,514 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:21:20,516 INFO L264 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:21:20,518 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:21:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 19:21:20,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:21:20,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-12-18 19:21:20,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100914116] [2019-12-18 19:21:20,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:21:20,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:21:20,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:21:20,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:21:20,559 INFO L87 Difference]: Start difference. First operand 1543 states and 2002 transitions. Second operand 14 states. [2019-12-18 19:21:20,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:21:20,638 INFO L93 Difference]: Finished difference Result 1718 states and 2208 transitions. [2019-12-18 19:21:20,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 19:21:20,638 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 118 [2019-12-18 19:21:20,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:21:20,643 INFO L225 Difference]: With dead ends: 1718 [2019-12-18 19:21:20,643 INFO L226 Difference]: Without dead ends: 1718 [2019-12-18 19:21:20,643 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:21:20,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2019-12-18 19:21:20,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1672. [2019-12-18 19:21:20,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1672 states. [2019-12-18 19:21:20,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2158 transitions. [2019-12-18 19:21:20,664 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2158 transitions. Word has length 118 [2019-12-18 19:21:20,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:21:20,665 INFO L462 AbstractCegarLoop]: Abstraction has 1672 states and 2158 transitions. [2019-12-18 19:21:20,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:21:20,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2158 transitions. [2019-12-18 19:21:20,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-12-18 19:21:20,669 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:21:20,669 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:21:20,873 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:21:20,873 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:21:20,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:21:20,874 INFO L82 PathProgramCache]: Analyzing trace with hash -697458397, now seen corresponding path program 25 times [2019-12-18 19:21:20,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:21:20,875 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255916450] [2019-12-18 19:21:20,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:21:20,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:21:21,085 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 19:21:21,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255916450] [2019-12-18 19:21:21,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759003739] [2019-12-18 19:21:21,086 INFO L92 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 [2019-12-18 19:21:21,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:21:21,232 INFO L264 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 19:21:21,234 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:21:21,265 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 19:21:21,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:21:21,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-12-18 19:21:21,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127436301] [2019-12-18 19:21:21,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-18 19:21:21,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:21:21,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-18 19:21:21,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-12-18 19:21:21,269 INFO L87 Difference]: Start difference. First operand 1672 states and 2158 transitions. Second operand 15 states. [2019-12-18 19:21:21,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:21:21,359 INFO L93 Difference]: Finished difference Result 1847 states and 2364 transitions. [2019-12-18 19:21:21,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 19:21:21,359 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2019-12-18 19:21:21,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:21:21,367 INFO L225 Difference]: With dead ends: 1847 [2019-12-18 19:21:21,367 INFO L226 Difference]: Without dead ends: 1847 [2019-12-18 19:21:21,368 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-12-18 19:21:21,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2019-12-18 19:21:21,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1801. [2019-12-18 19:21:21,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1801 states. [2019-12-18 19:21:21,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2314 transitions. [2019-12-18 19:21:21,392 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2314 transitions. Word has length 121 [2019-12-18 19:21:21,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:21:21,393 INFO L462 AbstractCegarLoop]: Abstraction has 1801 states and 2314 transitions. [2019-12-18 19:21:21,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-18 19:21:21,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2314 transitions. [2019-12-18 19:21:21,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-12-18 19:21:21,397 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:21:21,398 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:21:21,602 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:21:21,602 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:21:21,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:21:21,603 INFO L82 PathProgramCache]: Analyzing trace with hash 95531009, now seen corresponding path program 26 times [2019-12-18 19:21:21,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:21:21,603 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949192858] [2019-12-18 19:21:21,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:21:21,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:21:21,841 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 19:21:21,842 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949192858] [2019-12-18 19:21:21,842 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570613452] [2019-12-18 19:21:21,842 INFO L92 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 [2019-12-18 19:21:22,006 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:21:22,007 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:21:22,010 INFO L264 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 19:21:22,019 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:21:22,070 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 19:21:22,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:21:22,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-12-18 19:21:22,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451680789] [2019-12-18 19:21:22,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:21:22,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:21:22,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:21:22,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:21:22,074 INFO L87 Difference]: Start difference. First operand 1801 states and 2314 transitions. Second operand 16 states. [2019-12-18 19:21:22,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:21:22,149 INFO L93 Difference]: Finished difference Result 1976 states and 2520 transitions. [2019-12-18 19:21:22,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 19:21:22,149 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 124 [2019-12-18 19:21:22,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:21:22,160 INFO L225 Difference]: With dead ends: 1976 [2019-12-18 19:21:22,160 INFO L226 Difference]: Without dead ends: 1976 [2019-12-18 19:21:22,161 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:21:22,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2019-12-18 19:21:22,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1930. [2019-12-18 19:21:22,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1930 states. [2019-12-18 19:21:22,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2470 transitions. [2019-12-18 19:21:22,196 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2470 transitions. Word has length 124 [2019-12-18 19:21:22,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:21:22,197 INFO L462 AbstractCegarLoop]: Abstraction has 1930 states and 2470 transitions. [2019-12-18 19:21:22,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:21:22,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2470 transitions. [2019-12-18 19:21:22,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-12-18 19:21:22,205 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:21:22,205 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:21:22,410 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:21:22,411 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:21:22,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:21:22,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1722797155, now seen corresponding path program 27 times [2019-12-18 19:21:22,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:21:22,412 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758855962] [2019-12-18 19:21:22,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:21:22,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:21:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 19:21:22,754 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758855962] [2019-12-18 19:21:22,754 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028914018] [2019-12-18 19:21:22,754 INFO L92 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 [2019-12-18 19:21:23,180 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2019-12-18 19:21:23,181 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:21:23,183 INFO L264 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-18 19:21:23,185 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:21:23,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 19:21:23,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:21:23,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-12-18 19:21:23,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901681739] [2019-12-18 19:21:23,212 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-18 19:21:23,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:21:23,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-18 19:21:23,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-12-18 19:21:23,212 INFO L87 Difference]: Start difference. First operand 1930 states and 2470 transitions. Second operand 17 states. [2019-12-18 19:21:23,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:21:23,297 INFO L93 Difference]: Finished difference Result 2105 states and 2676 transitions. [2019-12-18 19:21:23,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 19:21:23,298 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 127 [2019-12-18 19:21:23,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:21:23,306 INFO L225 Difference]: With dead ends: 2105 [2019-12-18 19:21:23,307 INFO L226 Difference]: Without dead ends: 2105 [2019-12-18 19:21:23,308 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-12-18 19:21:23,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2019-12-18 19:21:23,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 2059. [2019-12-18 19:21:23,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2059 states. [2019-12-18 19:21:23,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 2626 transitions. [2019-12-18 19:21:23,336 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 2626 transitions. Word has length 127 [2019-12-18 19:21:23,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:21:23,336 INFO L462 AbstractCegarLoop]: Abstraction has 2059 states and 2626 transitions. [2019-12-18 19:21:23,337 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-18 19:21:23,337 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 2626 transitions. [2019-12-18 19:21:23,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-12-18 19:21:23,342 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:21:23,342 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:21:23,546 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:21:23,546 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:21:23,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:21:23,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1982284607, now seen corresponding path program 28 times [2019-12-18 19:21:23,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:21:23,547 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310891041] [2019-12-18 19:21:23,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:21:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:21:23,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 19:21:23,817 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310891041] [2019-12-18 19:21:23,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353749617] [2019-12-18 19:21:23,818 INFO L92 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 [2019-12-18 19:21:24,868 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:21:24,868 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:21:24,871 INFO L264 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-18 19:21:24,873 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:21:24,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 19:21:24,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:21:24,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-12-18 19:21:24,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436516341] [2019-12-18 19:21:24,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:21:24,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:21:24,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:21:24,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:21:24,926 INFO L87 Difference]: Start difference. First operand 2059 states and 2626 transitions. Second operand 18 states. [2019-12-18 19:21:25,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:21:25,006 INFO L93 Difference]: Finished difference Result 2234 states and 2832 transitions. [2019-12-18 19:21:25,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 19:21:25,006 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 130 [2019-12-18 19:21:25,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:21:25,015 INFO L225 Difference]: With dead ends: 2234 [2019-12-18 19:21:25,015 INFO L226 Difference]: Without dead ends: 2234 [2019-12-18 19:21:25,015 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:21:25,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2019-12-18 19:21:25,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2188. [2019-12-18 19:21:25,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2188 states. [2019-12-18 19:21:25,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 2782 transitions. [2019-12-18 19:21:25,044 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 2782 transitions. Word has length 130 [2019-12-18 19:21:25,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:21:25,044 INFO L462 AbstractCegarLoop]: Abstraction has 2188 states and 2782 transitions. [2019-12-18 19:21:25,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:21:25,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 2782 transitions. [2019-12-18 19:21:25,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-12-18 19:21:25,050 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:21:25,050 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:21:25,255 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:21:25,256 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:21:25,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:21:25,256 INFO L82 PathProgramCache]: Analyzing trace with hash 586450851, now seen corresponding path program 29 times [2019-12-18 19:21:25,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:21:25,256 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647327820] [2019-12-18 19:21:25,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:21:25,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:21:25,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 19:21:25,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647327820] [2019-12-18 19:21:25,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511456547] [2019-12-18 19:21:25,514 INFO L92 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 [2019-12-18 19:21:25,775 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-12-18 19:21:25,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:21:25,778 INFO L264 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-18 19:21:25,780 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:21:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 19:21:25,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:21:25,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-12-18 19:21:25,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177765537] [2019-12-18 19:21:25,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-18 19:21:25,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:21:25,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-18 19:21:25,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-12-18 19:21:25,832 INFO L87 Difference]: Start difference. First operand 2188 states and 2782 transitions. Second operand 19 states. [2019-12-18 19:21:25,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:21:25,920 INFO L93 Difference]: Finished difference Result 2363 states and 2988 transitions. [2019-12-18 19:21:25,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 19:21:25,921 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 133 [2019-12-18 19:21:25,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:21:25,929 INFO L225 Difference]: With dead ends: 2363 [2019-12-18 19:21:25,930 INFO L226 Difference]: Without dead ends: 2363 [2019-12-18 19:21:25,930 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-12-18 19:21:25,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2019-12-18 19:21:25,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 2317. [2019-12-18 19:21:25,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2317 states. [2019-12-18 19:21:25,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 2938 transitions. [2019-12-18 19:21:25,960 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 2938 transitions. Word has length 133 [2019-12-18 19:21:25,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:21:25,960 INFO L462 AbstractCegarLoop]: Abstraction has 2317 states and 2938 transitions. [2019-12-18 19:21:25,960 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-18 19:21:25,960 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 2938 transitions. [2019-12-18 19:21:25,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-12-18 19:21:25,965 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:21:25,965 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:21:26,169 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:21:26,169 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:21:26,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:21:26,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1942799999, now seen corresponding path program 30 times [2019-12-18 19:21:26,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:21:26,170 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368933931] [2019-12-18 19:21:26,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:21:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:21:26,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 19:21:26,525 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368933931] [2019-12-18 19:21:26,525 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081256303] [2019-12-18 19:21:26,525 INFO L92 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 [2019-12-18 19:21:27,132 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2019-12-18 19:21:27,132 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:21:27,134 INFO L264 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-18 19:21:27,136 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:21:27,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 19:21:27,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:21:27,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-12-18 19:21:27,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177185234] [2019-12-18 19:21:27,166 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 19:21:27,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:21:27,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 19:21:27,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-12-18 19:21:27,167 INFO L87 Difference]: Start difference. First operand 2317 states and 2938 transitions. Second operand 20 states. [2019-12-18 19:21:27,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:21:27,267 INFO L93 Difference]: Finished difference Result 2492 states and 3144 transitions. [2019-12-18 19:21:27,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 19:21:27,267 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 136 [2019-12-18 19:21:27,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:21:27,275 INFO L225 Difference]: With dead ends: 2492 [2019-12-18 19:21:27,275 INFO L226 Difference]: Without dead ends: 2492 [2019-12-18 19:21:27,276 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-12-18 19:21:27,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2019-12-18 19:21:27,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 2446. [2019-12-18 19:21:27,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2446 states. [2019-12-18 19:21:27,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2446 states to 2446 states and 3094 transitions. [2019-12-18 19:21:27,311 INFO L78 Accepts]: Start accepts. Automaton has 2446 states and 3094 transitions. Word has length 136 [2019-12-18 19:21:27,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:21:27,311 INFO L462 AbstractCegarLoop]: Abstraction has 2446 states and 3094 transitions. [2019-12-18 19:21:27,312 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 19:21:27,312 INFO L276 IsEmpty]: Start isEmpty. Operand 2446 states and 3094 transitions. [2019-12-18 19:21:27,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-12-18 19:21:27,316 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:21:27,316 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:21:27,521 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:21:27,522 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:21:27,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:21:27,522 INFO L82 PathProgramCache]: Analyzing trace with hash 51368675, now seen corresponding path program 31 times [2019-12-18 19:21:27,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:21:27,523 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574336795] [2019-12-18 19:21:27,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:21:27,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:21:27,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 19:21:27,785 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574336795] [2019-12-18 19:21:27,785 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491783740] [2019-12-18 19:21:27,786 INFO L92 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 [2019-12-18 19:21:27,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:21:27,897 INFO L264 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-18 19:21:27,899 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:21:27,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 19:21:27,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:21:27,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-12-18 19:21:27,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470450651] [2019-12-18 19:21:27,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-18 19:21:27,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:21:27,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-18 19:21:27,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-12-18 19:21:27,922 INFO L87 Difference]: Start difference. First operand 2446 states and 3094 transitions. Second operand 21 states. [2019-12-18 19:21:27,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:21:27,987 INFO L93 Difference]: Finished difference Result 2621 states and 3300 transitions. [2019-12-18 19:21:27,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 19:21:27,988 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 139 [2019-12-18 19:21:27,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:21:27,992 INFO L225 Difference]: With dead ends: 2621 [2019-12-18 19:21:27,992 INFO L226 Difference]: Without dead ends: 2621 [2019-12-18 19:21:27,993 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-12-18 19:21:27,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2621 states. [2019-12-18 19:21:28,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2621 to 2575. [2019-12-18 19:21:28,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2575 states. [2019-12-18 19:21:28,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 3250 transitions. [2019-12-18 19:21:28,017 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 3250 transitions. Word has length 139 [2019-12-18 19:21:28,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:21:28,018 INFO L462 AbstractCegarLoop]: Abstraction has 2575 states and 3250 transitions. [2019-12-18 19:21:28,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-18 19:21:28,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 3250 transitions. [2019-12-18 19:21:28,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-12-18 19:21:28,021 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:21:28,021 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:21:28,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:21:28,225 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:21:28,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:21:28,226 INFO L82 PathProgramCache]: Analyzing trace with hash 342697537, now seen corresponding path program 32 times [2019-12-18 19:21:28,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:21:28,226 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145920468] [2019-12-18 19:21:28,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:21:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:21:28,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 19:21:28,525 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145920468] [2019-12-18 19:21:28,525 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275143075] [2019-12-18 19:21:28,525 INFO L92 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 [2019-12-18 19:21:28,688 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:21:28,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:21:28,690 INFO L264 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-18 19:21:28,692 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:21:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 19:21:28,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:21:28,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-12-18 19:21:28,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287025490] [2019-12-18 19:21:28,722 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-18 19:21:28,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:21:28,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-18 19:21:28,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-12-18 19:21:28,723 INFO L87 Difference]: Start difference. First operand 2575 states and 3250 transitions. Second operand 22 states. [2019-12-18 19:21:28,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:21:28,813 INFO L93 Difference]: Finished difference Result 2750 states and 3456 transitions. [2019-12-18 19:21:28,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 19:21:28,813 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 142 [2019-12-18 19:21:28,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:21:28,828 INFO L225 Difference]: With dead ends: 2750 [2019-12-18 19:21:28,828 INFO L226 Difference]: Without dead ends: 2750 [2019-12-18 19:21:28,829 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-12-18 19:21:28,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2019-12-18 19:21:28,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 2704. [2019-12-18 19:21:28,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2704 states. [2019-12-18 19:21:28,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2704 states to 2704 states and 3406 transitions. [2019-12-18 19:21:28,860 INFO L78 Accepts]: Start accepts. Automaton has 2704 states and 3406 transitions. Word has length 142 [2019-12-18 19:21:28,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:21:28,861 INFO L462 AbstractCegarLoop]: Abstraction has 2704 states and 3406 transitions. [2019-12-18 19:21:28,861 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-18 19:21:28,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2704 states and 3406 transitions. [2019-12-18 19:21:28,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-12-18 19:21:28,868 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:21:28,868 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:21:29,072 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:21:29,072 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:21:29,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:21:29,073 INFO L82 PathProgramCache]: Analyzing trace with hash -808079837, now seen corresponding path program 33 times [2019-12-18 19:21:29,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:21:29,073 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063497536] [2019-12-18 19:21:29,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:21:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:21:29,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 19:21:29,422 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063497536] [2019-12-18 19:21:29,422 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353932349] [2019-12-18 19:21:29,423 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:21:29,866 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2019-12-18 19:21:29,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:21:29,870 INFO L264 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-18 19:21:29,872 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:21:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 19:21:29,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:21:29,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-12-18 19:21:29,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862577813] [2019-12-18 19:21:29,923 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-18 19:21:29,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:21:29,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-18 19:21:29,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-12-18 19:21:29,924 INFO L87 Difference]: Start difference. First operand 2704 states and 3406 transitions. Second operand 23 states. [2019-12-18 19:21:30,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:21:30,038 INFO L93 Difference]: Finished difference Result 2833 states and 3562 transitions. [2019-12-18 19:21:30,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 19:21:30,039 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 145 [2019-12-18 19:21:30,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:21:30,043 INFO L225 Difference]: With dead ends: 2833 [2019-12-18 19:21:30,044 INFO L226 Difference]: Without dead ends: 2833 [2019-12-18 19:21:30,046 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-12-18 19:21:30,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2019-12-18 19:21:30,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 2833. [2019-12-18 19:21:30,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2833 states. [2019-12-18 19:21:30,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2833 states to 2833 states and 3562 transitions. [2019-12-18 19:21:30,075 INFO L78 Accepts]: Start accepts. Automaton has 2833 states and 3562 transitions. Word has length 145 [2019-12-18 19:21:30,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:21:30,075 INFO L462 AbstractCegarLoop]: Abstraction has 2833 states and 3562 transitions. [2019-12-18 19:21:30,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-18 19:21:30,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2833 states and 3562 transitions. [2019-12-18 19:21:30,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-12-18 19:21:30,080 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:21:30,080 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:21:30,284 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:21:30,285 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:21:30,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:21:30,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1187871999, now seen corresponding path program 34 times [2019-12-18 19:21:30,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:21:30,285 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305873882] [2019-12-18 19:21:30,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:21:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:21:32,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:21:32,547 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305873882] [2019-12-18 19:21:32,547 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867754750] [2019-12-18 19:21:32,547 INFO L92 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:21:34,542 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:21:34,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:21:34,550 INFO L264 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2019-12-18 19:21:34,555 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:21:34,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:21:34,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:21:34,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2019-12-18 19:21:34,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296621258] [2019-12-18 19:21:34,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-12-18 19:21:34,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:21:34,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-12-18 19:21:34,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2019-12-18 19:21:34,638 INFO L87 Difference]: Start difference. First operand 2833 states and 3562 transitions. Second operand 63 states. [2019-12-18 19:22:47,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:22:47,190 INFO L93 Difference]: Finished difference Result 32926 states and 45933 transitions. [2019-12-18 19:22:47,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 633 states. [2019-12-18 19:22:47,190 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2019-12-18 19:22:47,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:22:47,233 INFO L225 Difference]: With dead ends: 32926 [2019-12-18 19:22:47,233 INFO L226 Difference]: Without dead ends: 32924 [2019-12-18 19:22:47,255 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 632 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162735 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=2407, Invalid=398915, Unknown=0, NotChecked=0, Total=401322 [2019-12-18 19:22:47,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32924 states. [2019-12-18 19:22:47,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32924 to 2967. [2019-12-18 19:22:47,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2967 states. [2019-12-18 19:22:47,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2967 states to 2967 states and 3794 transitions. [2019-12-18 19:22:47,430 INFO L78 Accepts]: Start accepts. Automaton has 2967 states and 3794 transitions. Word has length 148 [2019-12-18 19:22:47,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:22:47,431 INFO L462 AbstractCegarLoop]: Abstraction has 2967 states and 3794 transitions. [2019-12-18 19:22:47,431 INFO L463 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-12-18 19:22:47,431 INFO L276 IsEmpty]: Start isEmpty. Operand 2967 states and 3794 transitions. [2019-12-18 19:22:47,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-12-18 19:22:47,438 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:22:47,438 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:22:47,646 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:22:47,647 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:22:47,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:22:47,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1530624017, now seen corresponding path program 35 times [2019-12-18 19:22:47,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:22:47,647 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570477992] [2019-12-18 19:22:47,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:22:47,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:22:49,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:22:49,863 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570477992] [2019-12-18 19:22:49,863 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418726523] [2019-12-18 19:22:49,864 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:22:50,126 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-12-18 19:22:50,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:22:50,130 INFO L264 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2019-12-18 19:22:50,134 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:22:50,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:22:50,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:22:50,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2019-12-18 19:22:50,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148199115] [2019-12-18 19:22:50,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-12-18 19:22:50,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:22:50,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-12-18 19:22:50,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2019-12-18 19:22:50,202 INFO L87 Difference]: Start difference. First operand 2967 states and 3794 transitions. Second operand 63 states. [2019-12-18 19:23:48,002 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2019-12-18 19:23:59,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:23:59,018 INFO L93 Difference]: Finished difference Result 30945 states and 43173 transitions. [2019-12-18 19:23:59,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2019-12-18 19:23:59,019 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2019-12-18 19:23:59,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:23:59,051 INFO L225 Difference]: With dead ends: 30945 [2019-12-18 19:23:59,051 INFO L226 Difference]: Without dead ends: 30943 [2019-12-18 19:23:59,064 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2019-12-18 19:23:59,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30943 states. [2019-12-18 19:23:59,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30943 to 2973. [2019-12-18 19:23:59,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2973 states. [2019-12-18 19:23:59,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 3801 transitions. [2019-12-18 19:23:59,218 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 3801 transitions. Word has length 148 [2019-12-18 19:23:59,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:23:59,219 INFO L462 AbstractCegarLoop]: Abstraction has 2973 states and 3801 transitions. [2019-12-18 19:23:59,219 INFO L463 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-12-18 19:23:59,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 3801 transitions. [2019-12-18 19:23:59,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-12-18 19:23:59,224 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:23:59,224 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:23:59,428 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:23:59,428 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:23:59,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:23:59,429 INFO L82 PathProgramCache]: Analyzing trace with hash -298559039, now seen corresponding path program 36 times [2019-12-18 19:23:59,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:23:59,429 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925414502] [2019-12-18 19:23:59,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:23:59,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:24:01,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:24:01,821 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925414502] [2019-12-18 19:24:01,821 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451484982] [2019-12-18 19:24:01,821 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:24:02,324 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2019-12-18 19:24:02,324 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:24:02,329 INFO L264 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2019-12-18 19:24:02,331 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:24:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:24:02,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:24:02,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2019-12-18 19:24:02,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169023233] [2019-12-18 19:24:02,388 INFO L442 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-12-18 19:24:02,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:24:02,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-12-18 19:24:02,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2019-12-18 19:24:02,389 INFO L87 Difference]: Start difference. First operand 2973 states and 3801 transitions. Second operand 63 states. Received shutdown request... [2019-12-18 19:24:52,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 453 states. [2019-12-18 19:24:52,530 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:24:52,530 WARN L527 AbstractCegarLoop]: Verification canceled [2019-12-18 19:24:52,536 WARN L227 ceAbstractionStarter]: Timeout [2019-12-18 19:24:52,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 07:24:52 BasicIcfg [2019-12-18 19:24:52,537 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-18 19:24:52,538 INFO L168 Benchmark]: Toolchain (without parser) took 243201.05 ms. Allocated memory was 134.2 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 96.9 MB in the beginning and 716.3 MB in the end (delta: -619.4 MB). Peak memory consumption was 827.6 MB. Max. memory is 7.1 GB. [2019-12-18 19:24:52,539 INFO L168 Benchmark]: CDTParser took 0.48 ms. Allocated memory is still 134.2 MB. Free memory is still 117.2 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-12-18 19:24:52,539 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1062.10 ms. Allocated memory was 134.2 MB in the beginning and 198.7 MB in the end (delta: 64.5 MB). Free memory was 96.7 MB in the beginning and 102.2 MB in the end (delta: -5.4 MB). Peak memory consumption was 64.3 MB. Max. memory is 7.1 GB. [2019-12-18 19:24:52,540 INFO L168 Benchmark]: Boogie Procedure Inliner took 127.03 ms. Allocated memory is still 198.7 MB. Free memory was 102.2 MB in the beginning and 99.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2019-12-18 19:24:52,540 INFO L168 Benchmark]: Boogie Preprocessor took 81.95 ms. Allocated memory is still 198.7 MB. Free memory was 99.9 MB in the beginning and 98.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. [2019-12-18 19:24:52,540 INFO L168 Benchmark]: RCFGBuilder took 775.14 ms. Allocated memory was 198.7 MB in the beginning and 223.9 MB in the end (delta: 25.2 MB). Free memory was 98.3 MB in the beginning and 190.4 MB in the end (delta: -92.0 MB). Peak memory consumption was 27.3 MB. Max. memory is 7.1 GB. [2019-12-18 19:24:52,541 INFO L168 Benchmark]: TraceAbstraction took 241148.92 ms. Allocated memory was 223.9 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 190.4 MB in the beginning and 716.3 MB in the end (delta: -526.0 MB). Peak memory consumption was 831.4 MB. Max. memory is 7.1 GB. [2019-12-18 19:24:52,543 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48 ms. Allocated memory is still 134.2 MB. Free memory is still 117.2 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1062.10 ms. Allocated memory was 134.2 MB in the beginning and 198.7 MB in the end (delta: 64.5 MB). Free memory was 96.7 MB in the beginning and 102.2 MB in the end (delta: -5.4 MB). Peak memory consumption was 64.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 127.03 ms. Allocated memory is still 198.7 MB. Free memory was 102.2 MB in the beginning and 99.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 81.95 ms. Allocated memory is still 198.7 MB. Free memory was 99.9 MB in the beginning and 98.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 775.14 ms. Allocated memory was 198.7 MB in the beginning and 223.9 MB in the end (delta: 25.2 MB). Free memory was 98.3 MB in the beginning and 190.4 MB in the end (delta: -92.0 MB). Peak memory consumption was 27.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 241148.92 ms. Allocated memory was 223.9 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 190.4 MB in the beginning and 716.3 MB in the end (delta: -526.0 MB). Peak memory consumption was 831.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 3.3s, 78 ProgramPointsBefore, 18 ProgramPointsAfterwards, 81 TransitionsBefore, 17 TransitionsAfterwards, 646 CoEnabledTransitionPairs, 6 FixpointIterations, 37 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 6 ConcurrentYvCompositions, 5 ChoiceCompositions, 323 VarBasedMoverChecksPositive, 14 VarBasedMoverChecksNegative, 5 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 738 CheckedPairsTotal, 68 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 2]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 2). Cancelled while BasicCegarLoop was constructing difference of abstraction (2973states) and FLOYD_HOARE automaton (currently 453 states, 63 states before enhancement),while ReachableStatesComputation was computing reachable states (17914 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 75 locations, 1 error locations. Result: TIMEOUT, OverallTime: 241.0s, OverallIterations: 38, TraceHistogramMax: 20, AutomataDifference: 203.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 6809 SDtfs, 12503 SDslu, 363780 SDs, 0 SdLazy, 208543 SolverSat, 2477 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 113.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6058 GetRequests, 3550 SyntacticMatches, 3 SemanticMatches, 2505 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416305 ImplicationChecksByTransitivity, 74.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2973occurred in iteration=37, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 37 MinimizatonAttempts, 59058 StatesRemovedByMinimization, 34 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 8.5s SatisfiabilityAnalysisTime, 13.5s InterpolantComputationTime, 6504 NumberOfCodeBlocks, 6197 NumberOfCodeBlocksAsserted, 324 NumberOfCheckSat, 6431 ConstructedInterpolants, 0 QuantifiedInterpolants, 2534141 SizeOfPredicates, 152 NumberOfNonLiveVariables, 11897 ConjunctsInSsa, 876 ConjunctsInUnsatCore, 73 InterpolantComputations, 3 PerfectInterpolantSequences, 22532/46005 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown