/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-60655ea [2020-09-15 13:08:29,792 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-15 13:08:29,797 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-15 13:08:29,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-15 13:08:29,847 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-15 13:08:29,858 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-15 13:08:29,860 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-15 13:08:29,865 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-15 13:08:29,868 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-15 13:08:29,869 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-15 13:08:29,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-15 13:08:29,875 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-15 13:08:29,875 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-15 13:08:29,876 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-15 13:08:29,879 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-15 13:08:29,882 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-15 13:08:29,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-15 13:08:29,888 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-15 13:08:29,890 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-15 13:08:29,897 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-15 13:08:29,901 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-15 13:08:29,902 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-15 13:08:29,905 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-15 13:08:29,906 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-15 13:08:29,913 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-15 13:08:29,919 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-15 13:08:29,920 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-15 13:08:29,921 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-15 13:08:29,922 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-15 13:08:29,923 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-15 13:08:29,923 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-15 13:08:29,925 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-15 13:08:29,925 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-15 13:08:29,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-15 13:08:29,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-15 13:08:29,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-15 13:08:29,930 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-09-15 13:08:29,983 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-15 13:08:29,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-15 13:08:29,986 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-15 13:08:29,987 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-15 13:08:29,987 INFO L138 SettingsManager]: * Use SBE=true [2020-09-15 13:08:29,987 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-15 13:08:29,987 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-15 13:08:29,987 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-15 13:08:29,988 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-15 13:08:29,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-15 13:08:29,989 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-15 13:08:29,989 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-15 13:08:29,990 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-15 13:08:29,990 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-15 13:08:29,990 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-15 13:08:29,990 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-15 13:08:29,991 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-15 13:08:29,991 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-15 13:08:29,991 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-15 13:08:29,991 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-15 13:08:29,991 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-15 13:08:29,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-15 13:08:29,992 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-15 13:08:29,992 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-15 13:08:29,992 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-15 13:08:29,993 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-15 13:08:29,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-15 13:08:29,993 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-15 13:08:29,993 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-15 13:08:30,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-15 13:08:30,461 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-15 13:08:30,465 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-15 13:08:30,467 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-15 13:08:30,468 INFO L275 PluginConnector]: CDTParser initialized [2020-09-15 13:08:30,469 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-09-15 13:08:30,555 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca9e41be4/4ff6826fce424bceb5683d72820a270d/FLAG1563fc7a4 [2020-09-15 13:08:31,268 INFO L306 CDTParser]: Found 1 translation units. [2020-09-15 13:08:31,269 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-09-15 13:08:31,302 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca9e41be4/4ff6826fce424bceb5683d72820a270d/FLAG1563fc7a4 [2020-09-15 13:08:31,579 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca9e41be4/4ff6826fce424bceb5683d72820a270d [2020-09-15 13:08:31,593 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-15 13:08:31,599 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-15 13:08:31,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-15 13:08:31,600 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-15 13:08:31,605 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-15 13:08:31,606 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 01:08:31" (1/1) ... [2020-09-15 13:08:31,610 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c8345ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:08:31, skipping insertion in model container [2020-09-15 13:08:31,611 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 01:08:31" (1/1) ... [2020-09-15 13:08:31,620 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-15 13:08:31,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-15 13:08:32,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-15 13:08:32,438 INFO L203 MainTranslator]: Completed pre-run [2020-09-15 13:08:32,498 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-15 13:08:32,747 INFO L208 MainTranslator]: Completed translation [2020-09-15 13:08:32,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:08:32 WrapperNode [2020-09-15 13:08:32,749 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-15 13:08:32,750 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-15 13:08:32,750 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-15 13:08:32,750 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-15 13:08:32,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:08:32" (1/1) ... [2020-09-15 13:08:32,789 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:08:32" (1/1) ... [2020-09-15 13:08:32,819 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-15 13:08:32,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-15 13:08:32,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-15 13:08:32,820 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-15 13:08:32,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:08:32" (1/1) ... [2020-09-15 13:08:32,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:08:32" (1/1) ... [2020-09-15 13:08:32,834 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:08:32" (1/1) ... [2020-09-15 13:08:32,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:08:32" (1/1) ... [2020-09-15 13:08:32,842 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:08:32" (1/1) ... [2020-09-15 13:08:32,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:08:32" (1/1) ... [2020-09-15 13:08:32,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:08:32" (1/1) ... [2020-09-15 13:08:32,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-15 13:08:32,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-15 13:08:32,856 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-15 13:08:32,857 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-15 13:08:32,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:08:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-15 13:08:32,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-15 13:08:32,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-15 13:08:32,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-15 13:08:32,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-15 13:08:32,952 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-09-15 13:08:32,952 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2020-09-15 13:08:32,953 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2020-09-15 13:08:32,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-15 13:08:32,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-15 13:08:32,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-15 13:08:32,956 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-15 13:08:33,413 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-15 13:08:33,414 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-09-15 13:08:33,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 01:08:33 BoogieIcfgContainer [2020-09-15 13:08:33,419 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-15 13:08:33,421 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-15 13:08:33,421 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-15 13:08:33,425 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-15 13:08:33,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 01:08:31" (1/3) ... [2020-09-15 13:08:33,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@224070b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 01:08:33, skipping insertion in model container [2020-09-15 13:08:33,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:08:32" (2/3) ... [2020-09-15 13:08:33,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@224070b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 01:08:33, skipping insertion in model container [2020-09-15 13:08:33,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 01:08:33" (3/3) ... [2020-09-15 13:08:33,429 INFO L109 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2020-09-15 13:08:33,441 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-15 13:08:33,441 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-15 13:08:33,450 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-15 13:08:33,451 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-15 13:08:33,480 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:33,480 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:33,481 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:33,481 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:33,481 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:33,481 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:33,482 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:33,482 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:33,482 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:33,483 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:33,483 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:33,483 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:33,483 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:33,484 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:33,484 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:33,484 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:33,484 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:33,484 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:33,485 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:33,485 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:33,485 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:33,485 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:33,486 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:33,490 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:33,491 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:33,491 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:33,491 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:33,491 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:33,492 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:33,492 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:33,492 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:33,492 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:33,529 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-15 13:08:33,557 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-15 13:08:33,558 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-15 13:08:33,558 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-15 13:08:33,558 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-15 13:08:33,558 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-15 13:08:33,558 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-15 13:08:33,558 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-15 13:08:33,559 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-15 13:08:33,578 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 81 transitions, 170 flow [2020-09-15 13:08:33,581 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 170 flow [2020-09-15 13:08:33,640 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2020-09-15 13:08:33,641 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-15 13:08:33,648 INFO L80 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 80 events. 7/80 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 79 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-09-15 13:08:33,652 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 170 flow [2020-09-15 13:08:33,676 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2020-09-15 13:08:33,676 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-15 13:08:33,677 INFO L80 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 80 events. 7/80 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 79 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-09-15 13:08:33,679 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 646 [2020-09-15 13:08:33,680 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-15 13:08:35,546 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-09-15 13:08:35,729 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-09-15 13:08:36,456 WARN L193 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 110 [2020-09-15 13:08:36,738 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-09-15 13:08:36,759 INFO L206 etLargeBlockEncoding]: Checked pairs total: 738 [2020-09-15 13:08:36,759 INFO L214 etLargeBlockEncoding]: Total number of compositions: 70 [2020-09-15 13:08:36,764 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 19 places, 17 transitions, 42 flow [2020-09-15 13:08:36,777 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2020-09-15 13:08:36,780 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-09-15 13:08:36,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-15 13:08:36,790 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:08:36,791 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:08:36,791 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:08:36,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:08:36,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1717538151, now seen corresponding path program 1 times [2020-09-15 13:08:36,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:08:36,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271010903] [2020-09-15 13:08:36,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:08:36,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:37,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:08:37,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271010903] [2020-09-15 13:08:37,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:08:37,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 13:08:37,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930941571] [2020-09-15 13:08:37,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-15 13:08:37,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:08:37,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-15 13:08:37,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-15 13:08:37,098 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-09-15 13:08:37,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:08:37,150 INFO L93 Difference]: Finished difference Result 52 states and 100 transitions. [2020-09-15 13:08:37,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-15 13:08:37,152 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-09-15 13:08:37,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:08:37,167 INFO L225 Difference]: With dead ends: 52 [2020-09-15 13:08:37,168 INFO L226 Difference]: Without dead ends: 52 [2020-09-15 13:08:37,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-15 13:08:37,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-15 13:08:37,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-09-15 13:08:37,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-15 13:08:37,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2020-09-15 13:08:37,214 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 8 [2020-09-15 13:08:37,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:08:37,215 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2020-09-15 13:08:37,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-15 13:08:37,215 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2020-09-15 13:08:37,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 13:08:37,216 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:08:37,216 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:08:37,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-15 13:08:37,217 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:08:37,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:08:37,217 INFO L82 PathProgramCache]: Analyzing trace with hash 62706239, now seen corresponding path program 1 times [2020-09-15 13:08:37,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:08:37,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991840589] [2020-09-15 13:08:37,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:08:37,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:37,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:08:37,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991840589] [2020-09-15 13:08:37,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:08:37,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 13:08:37,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359252779] [2020-09-15 13:08:37,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-15 13:08:37,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:08:37,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-15 13:08:37,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-15 13:08:37,363 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand 3 states. [2020-09-15 13:08:37,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:08:37,387 INFO L93 Difference]: Finished difference Result 64 states and 124 transitions. [2020-09-15 13:08:37,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-15 13:08:37,388 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-09-15 13:08:37,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:08:37,389 INFO L225 Difference]: With dead ends: 64 [2020-09-15 13:08:37,389 INFO L226 Difference]: Without dead ends: 64 [2020-09-15 13:08:37,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-15 13:08:37,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-15 13:08:37,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2020-09-15 13:08:37,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 13:08:37,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 88 transitions. [2020-09-15 13:08:37,401 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 88 transitions. Word has length 11 [2020-09-15 13:08:37,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:08:37,401 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 88 transitions. [2020-09-15 13:08:37,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-15 13:08:37,401 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 88 transitions. [2020-09-15 13:08:37,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 13:08:37,403 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:08:37,403 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:08:37,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-15 13:08:37,403 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:08:37,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:08:37,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1954756591, now seen corresponding path program 1 times [2020-09-15 13:08:37,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:08:37,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452717689] [2020-09-15 13:08:37,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:08:37,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:08:37,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452717689] [2020-09-15 13:08:37,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:08:37,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 13:08:37,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525807249] [2020-09-15 13:08:37,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-15 13:08:37,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:08:37,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-15 13:08:37,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-15 13:08:37,543 INFO L87 Difference]: Start difference. First operand 46 states and 88 transitions. Second operand 3 states. [2020-09-15 13:08:37,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:08:37,562 INFO L93 Difference]: Finished difference Result 40 states and 66 transitions. [2020-09-15 13:08:37,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-15 13:08:37,563 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-09-15 13:08:37,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:08:37,564 INFO L225 Difference]: With dead ends: 40 [2020-09-15 13:08:37,564 INFO L226 Difference]: Without dead ends: 40 [2020-09-15 13:08:37,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-15 13:08:37,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-15 13:08:37,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-09-15 13:08:37,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-15 13:08:37,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 66 transitions. [2020-09-15 13:08:37,571 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 66 transitions. Word has length 15 [2020-09-15 13:08:37,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:08:37,571 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 66 transitions. [2020-09-15 13:08:37,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-15 13:08:37,572 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 66 transitions. [2020-09-15 13:08:37,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 13:08:37,573 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:08:37,573 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:08:37,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-15 13:08:37,573 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:08:37,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:08:37,574 INFO L82 PathProgramCache]: Analyzing trace with hash 525517821, now seen corresponding path program 2 times [2020-09-15 13:08:37,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:08:37,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380707249] [2020-09-15 13:08:37,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:08:37,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:37,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:08:37,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380707249] [2020-09-15 13:08:37,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799281196] [2020-09-15 13:08:37,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:37,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:08:37,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:08:37,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2020-09-15 13:08:37,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:08:37,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:08:37,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:08:37,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-09-15 13:08:37,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853898995] [2020-09-15 13:08:37,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-15 13:08:37,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:08:37,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-15 13:08:37,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-15 13:08:37,859 INFO L87 Difference]: Start difference. First operand 40 states and 66 transitions. Second operand 6 states. [2020-09-15 13:08:37,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:08:37,996 INFO L93 Difference]: Finished difference Result 104 states and 159 transitions. [2020-09-15 13:08:37,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 13:08:37,997 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-09-15 13:08:37,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:08:37,998 INFO L225 Difference]: With dead ends: 104 [2020-09-15 13:08:37,999 INFO L226 Difference]: Without dead ends: 104 [2020-09-15 13:08:37,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-09-15 13:08:38,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-15 13:08:38,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 79. [2020-09-15 13:08:38,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-15 13:08:38,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 124 transitions. [2020-09-15 13:08:38,011 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 124 transitions. Word has length 15 [2020-09-15 13:08:38,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:08:38,011 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 124 transitions. [2020-09-15 13:08:38,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-15 13:08:38,012 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 124 transitions. [2020-09-15 13:08:38,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 13:08:38,013 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:08:38,013 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:08:38,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:38,226 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:08:38,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:08:38,226 INFO L82 PathProgramCache]: Analyzing trace with hash 485096059, now seen corresponding path program 3 times [2020-09-15 13:08:38,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:08:38,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735609176] [2020-09-15 13:08:38,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:08:38,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:38,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-15 13:08:38,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735609176] [2020-09-15 13:08:38,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597251905] [2020-09-15 13:08:38,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:38,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 13:08:38,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:08:38,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-15 13:08:38,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:08:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-15 13:08:38,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:08:38,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-09-15 13:08:38,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987698372] [2020-09-15 13:08:38,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 13:08:38,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:08:38,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 13:08:38,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-15 13:08:38,498 INFO L87 Difference]: Start difference. First operand 79 states and 124 transitions. Second operand 8 states. [2020-09-15 13:08:38,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:08:38,788 INFO L93 Difference]: Finished difference Result 160 states and 236 transitions. [2020-09-15 13:08:38,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 13:08:38,790 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-09-15 13:08:38,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:08:38,793 INFO L225 Difference]: With dead ends: 160 [2020-09-15 13:08:38,793 INFO L226 Difference]: Without dead ends: 160 [2020-09-15 13:08:38,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2020-09-15 13:08:38,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-15 13:08:38,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 130. [2020-09-15 13:08:38,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-15 13:08:38,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 196 transitions. [2020-09-15 13:08:38,819 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 196 transitions. Word has length 22 [2020-09-15 13:08:38,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:08:38,820 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 196 transitions. [2020-09-15 13:08:38,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 13:08:38,820 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 196 transitions. [2020-09-15 13:08:38,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 13:08:38,824 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:08:38,824 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:08:39,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:39,039 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:08:39,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:08:39,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1548321815, now seen corresponding path program 4 times [2020-09-15 13:08:39,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:08:39,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552402889] [2020-09-15 13:08:39,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:08:39,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:39,196 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-15 13:08:39,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552402889] [2020-09-15 13:08:39,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309556659] [2020-09-15 13:08:39,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:39,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:08:39,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:08:39,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2020-09-15 13:08:39,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:08:39,315 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-15 13:08:39,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:08:39,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-15 13:08:39,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932597106] [2020-09-15 13:08:39,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-15 13:08:39,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:08:39,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-15 13:08:39,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:08:39,317 INFO L87 Difference]: Start difference. First operand 130 states and 196 transitions. Second operand 7 states. [2020-09-15 13:08:39,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:08:39,362 INFO L93 Difference]: Finished difference Result 178 states and 262 transitions. [2020-09-15 13:08:39,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-15 13:08:39,363 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-09-15 13:08:39,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:08:39,364 INFO L225 Difference]: With dead ends: 178 [2020-09-15 13:08:39,364 INFO L226 Difference]: Without dead ends: 178 [2020-09-15 13:08:39,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:08:39,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-09-15 13:08:39,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 160. [2020-09-15 13:08:39,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-15 13:08:39,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 238 transitions. [2020-09-15 13:08:39,377 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 238 transitions. Word has length 29 [2020-09-15 13:08:39,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:08:39,378 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 238 transitions. [2020-09-15 13:08:39,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-15 13:08:39,378 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 238 transitions. [2020-09-15 13:08:39,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 13:08:39,380 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:08:39,380 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:08:39,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:39,592 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:08:39,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:08:39,593 INFO L82 PathProgramCache]: Analyzing trace with hash -2012714619, now seen corresponding path program 5 times [2020-09-15 13:08:39,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:08:39,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140890869] [2020-09-15 13:08:39,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:08:39,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:39,749 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-15 13:08:39,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140890869] [2020-09-15 13:08:39,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184619224] [2020-09-15 13:08:39,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:39,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-15 13:08:39,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:08:39,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-15 13:08:39,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:08:39,908 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-15 13:08:39,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:08:39,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-15 13:08:39,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919954638] [2020-09-15 13:08:39,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 13:08:39,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:08:39,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 13:08:39,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-09-15 13:08:39,911 INFO L87 Difference]: Start difference. First operand 160 states and 238 transitions. Second operand 8 states. [2020-09-15 13:08:39,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:08:39,953 INFO L93 Difference]: Finished difference Result 208 states and 304 transitions. [2020-09-15 13:08:39,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-15 13:08:39,956 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-09-15 13:08:39,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:08:39,957 INFO L225 Difference]: With dead ends: 208 [2020-09-15 13:08:39,957 INFO L226 Difference]: Without dead ends: 208 [2020-09-15 13:08:39,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-09-15 13:08:39,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-15 13:08:39,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 190. [2020-09-15 13:08:39,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-09-15 13:08:39,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 280 transitions. [2020-09-15 13:08:39,971 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 280 transitions. Word has length 33 [2020-09-15 13:08:39,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:08:39,972 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 280 transitions. [2020-09-15 13:08:39,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 13:08:39,972 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 280 transitions. [2020-09-15 13:08:39,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-15 13:08:39,974 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:08:39,974 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:08:40,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:40,188 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:08:40,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:08:40,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1171974131, now seen corresponding path program 6 times [2020-09-15 13:08:40,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:08:40,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728915972] [2020-09-15 13:08:40,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:08:40,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-15 13:08:40,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728915972] [2020-09-15 13:08:40,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862545172] [2020-09-15 13:08:40,325 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:40,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-15 13:08:40,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:08:40,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2020-09-15 13:08:40,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:08:40,484 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-09-15 13:08:40,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:08:40,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-09-15 13:08:40,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039242562] [2020-09-15 13:08:40,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:08:40,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:08:40,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:08:40,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:08:40,487 INFO L87 Difference]: Start difference. First operand 190 states and 280 transitions. Second operand 12 states. [2020-09-15 13:08:41,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:08:41,124 INFO L93 Difference]: Finished difference Result 304 states and 429 transitions. [2020-09-15 13:08:41,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 13:08:41,124 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-09-15 13:08:41,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:08:41,126 INFO L225 Difference]: With dead ends: 304 [2020-09-15 13:08:41,127 INFO L226 Difference]: Without dead ends: 304 [2020-09-15 13:08:41,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=420, Invalid=840, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 13:08:41,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-09-15 13:08:41,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 265. [2020-09-15 13:08:41,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-09-15 13:08:41,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 380 transitions. [2020-09-15 13:08:41,140 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 380 transitions. Word has length 37 [2020-09-15 13:08:41,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:08:41,141 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 380 transitions. [2020-09-15 13:08:41,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:08:41,141 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 380 transitions. [2020-09-15 13:08:41,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-15 13:08:41,143 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:08:41,144 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:08:41,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:41,358 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:08:41,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:08:41,359 INFO L82 PathProgramCache]: Analyzing trace with hash -870694653, now seen corresponding path program 7 times [2020-09-15 13:08:41,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:08:41,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101010050] [2020-09-15 13:08:41,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:08:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:41,500 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-15 13:08:41,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101010050] [2020-09-15 13:08:41,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440824710] [2020-09-15 13:08:41,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:41,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:41,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 13:08:41,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:08:41,656 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-15 13:08:41,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:08:41,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-15 13:08:41,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699602340] [2020-09-15 13:08:41,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 13:08:41,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:08:41,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 13:08:41,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-09-15 13:08:41,660 INFO L87 Difference]: Start difference. First operand 265 states and 380 transitions. Second operand 10 states. [2020-09-15 13:08:41,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:08:41,709 INFO L93 Difference]: Finished difference Result 322 states and 456 transitions. [2020-09-15 13:08:41,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-15 13:08:41,710 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-09-15 13:08:41,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:08:41,712 INFO L225 Difference]: With dead ends: 322 [2020-09-15 13:08:41,712 INFO L226 Difference]: Without dead ends: 322 [2020-09-15 13:08:41,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-09-15 13:08:41,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-09-15 13:08:41,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 301. [2020-09-15 13:08:41,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-09-15 13:08:41,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 429 transitions. [2020-09-15 13:08:41,727 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 429 transitions. Word has length 44 [2020-09-15 13:08:41,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:08:41,728 INFO L479 AbstractCegarLoop]: Abstraction has 301 states and 429 transitions. [2020-09-15 13:08:41,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 13:08:41,728 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 429 transitions. [2020-09-15 13:08:41,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-15 13:08:41,735 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:08:41,735 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:08:41,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:41,949 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:08:41,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:08:41,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1422004693, now seen corresponding path program 8 times [2020-09-15 13:08:41,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:08:41,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600431723] [2020-09-15 13:08:41,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:08:42,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:42,158 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 10 proven. 91 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-15 13:08:42,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600431723] [2020-09-15 13:08:42,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349848334] [2020-09-15 13:08:42,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:42,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:08:42,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:08:42,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:08:42,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:08:42,287 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 10 proven. 91 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-15 13:08:42,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:08:42,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-15 13:08:42,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025369712] [2020-09-15 13:08:42,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 13:08:42,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:08:42,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 13:08:42,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-15 13:08:42,289 INFO L87 Difference]: Start difference. First operand 301 states and 429 transitions. Second operand 11 states. [2020-09-15 13:08:42,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:08:42,329 INFO L93 Difference]: Finished difference Result 358 states and 505 transitions. [2020-09-15 13:08:42,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 13:08:42,330 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-09-15 13:08:42,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:08:42,333 INFO L225 Difference]: With dead ends: 358 [2020-09-15 13:08:42,333 INFO L226 Difference]: Without dead ends: 358 [2020-09-15 13:08:42,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-15 13:08:42,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-09-15 13:08:42,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 337. [2020-09-15 13:08:42,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-09-15 13:08:42,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 478 transitions. [2020-09-15 13:08:42,343 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 478 transitions. Word has length 48 [2020-09-15 13:08:42,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:08:42,343 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 478 transitions. [2020-09-15 13:08:42,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 13:08:42,344 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 478 transitions. [2020-09-15 13:08:42,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-15 13:08:42,345 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:08:42,345 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:08:42,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-15 13:08:42,560 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:08:42,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:08:42,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1332663897, now seen corresponding path program 9 times [2020-09-15 13:08:42,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:08:42,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309526909] [2020-09-15 13:08:42,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:08:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:42,733 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 10 proven. 120 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-15 13:08:42,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309526909] [2020-09-15 13:08:42,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132702145] [2020-09-15 13:08:42,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:42,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-15 13:08:42,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:08:42,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-15 13:08:42,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:08:42,954 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-09-15 13:08:42,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:08:42,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2020-09-15 13:08:42,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198748970] [2020-09-15 13:08:42,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:08:42,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:08:42,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:08:42,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:08:42,960 INFO L87 Difference]: Start difference. First operand 337 states and 478 transitions. Second operand 16 states. [2020-09-15 13:08:44,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:08:44,300 INFO L93 Difference]: Finished difference Result 484 states and 664 transitions. [2020-09-15 13:08:44,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-09-15 13:08:44,301 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-09-15 13:08:44,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:08:44,304 INFO L225 Difference]: With dead ends: 484 [2020-09-15 13:08:44,305 INFO L226 Difference]: Without dead ends: 484 [2020-09-15 13:08:44,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1155, Invalid=2505, Unknown=0, NotChecked=0, Total=3660 [2020-09-15 13:08:44,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-09-15 13:08:44,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 436. [2020-09-15 13:08:44,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2020-09-15 13:08:44,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 606 transitions. [2020-09-15 13:08:44,318 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 606 transitions. Word has length 52 [2020-09-15 13:08:44,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:08:44,318 INFO L479 AbstractCegarLoop]: Abstraction has 436 states and 606 transitions. [2020-09-15 13:08:44,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:08:44,319 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 606 transitions. [2020-09-15 13:08:44,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-15 13:08:44,320 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:08:44,321 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:08:44,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-09-15 13:08:44,537 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:08:44,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:08:44,538 INFO L82 PathProgramCache]: Analyzing trace with hash 298647787, now seen corresponding path program 10 times [2020-09-15 13:08:44,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:08:44,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389966644] [2020-09-15 13:08:44,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:08:44,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:44,731 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 13 proven. 153 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-15 13:08:44,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389966644] [2020-09-15 13:08:44,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518800986] [2020-09-15 13:08:44,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:44,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:08:44,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:08:44,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 13:08:44,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:08:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 13 proven. 153 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-15 13:08:44,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:08:44,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-15 13:08:44,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996306104] [2020-09-15 13:08:44,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 13:08:44,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:08:44,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 13:08:44,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-09-15 13:08:44,931 INFO L87 Difference]: Start difference. First operand 436 states and 606 transitions. Second operand 13 states. [2020-09-15 13:08:44,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:08:44,977 INFO L93 Difference]: Finished difference Result 502 states and 692 transitions. [2020-09-15 13:08:44,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 13:08:44,978 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 59 [2020-09-15 13:08:44,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:08:44,981 INFO L225 Difference]: With dead ends: 502 [2020-09-15 13:08:44,982 INFO L226 Difference]: Without dead ends: 502 [2020-09-15 13:08:44,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-09-15 13:08:44,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-09-15 13:08:44,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 478. [2020-09-15 13:08:44,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 478 states. [2020-09-15 13:08:44,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 662 transitions. [2020-09-15 13:08:44,994 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 662 transitions. Word has length 59 [2020-09-15 13:08:44,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:08:44,994 INFO L479 AbstractCegarLoop]: Abstraction has 478 states and 662 transitions. [2020-09-15 13:08:44,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 13:08:44,995 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 662 transitions. [2020-09-15 13:08:44,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-15 13:08:44,996 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:08:44,996 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:08:45,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:45,213 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:08:45,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:08:45,214 INFO L82 PathProgramCache]: Analyzing trace with hash -734842407, now seen corresponding path program 11 times [2020-09-15 13:08:45,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:08:45,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909176978] [2020-09-15 13:08:45,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:08:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:45,420 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 13 proven. 190 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-15 13:08:45,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909176978] [2020-09-15 13:08:45,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469985455] [2020-09-15 13:08:45,421 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:45,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-15 13:08:45,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:08:45,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 13:08:45,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:08:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 13 proven. 190 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-15 13:08:45,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:08:45,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-15 13:08:45,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370465056] [2020-09-15 13:08:45,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 13:08:45,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:08:45,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 13:08:45,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-09-15 13:08:45,597 INFO L87 Difference]: Start difference. First operand 478 states and 662 transitions. Second operand 14 states. [2020-09-15 13:08:45,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:08:45,678 INFO L93 Difference]: Finished difference Result 544 states and 748 transitions. [2020-09-15 13:08:45,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:08:45,679 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-09-15 13:08:45,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:08:45,683 INFO L225 Difference]: With dead ends: 544 [2020-09-15 13:08:45,683 INFO L226 Difference]: Without dead ends: 544 [2020-09-15 13:08:45,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-09-15 13:08:45,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2020-09-15 13:08:45,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 520. [2020-09-15 13:08:45,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-09-15 13:08:45,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 718 transitions. [2020-09-15 13:08:45,697 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 718 transitions. Word has length 63 [2020-09-15 13:08:45,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:08:45,697 INFO L479 AbstractCegarLoop]: Abstraction has 520 states and 718 transitions. [2020-09-15 13:08:45,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 13:08:45,697 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 718 transitions. [2020-09-15 13:08:45,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-15 13:08:45,699 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:08:45,699 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:08:45,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:45,915 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:08:45,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:08:45,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1524941881, now seen corresponding path program 12 times [2020-09-15 13:08:45,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:08:45,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168189335] [2020-09-15 13:08:45,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:08:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:46,198 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 13 proven. 231 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-15 13:08:46,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168189335] [2020-09-15 13:08:46,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583389260] [2020-09-15 13:08:46,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:46,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-15 13:08:46,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:08:46,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 13:08:46,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:08:46,484 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-09-15 13:08:46,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:08:46,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 20 [2020-09-15 13:08:46,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960207651] [2020-09-15 13:08:46,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 13:08:46,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:08:46,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 13:08:46,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:08:46,491 INFO L87 Difference]: Start difference. First operand 520 states and 718 transitions. Second operand 20 states. [2020-09-15 13:08:49,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:08:49,124 INFO L93 Difference]: Finished difference Result 700 states and 941 transitions. [2020-09-15 13:08:49,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-09-15 13:08:49,125 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 67 [2020-09-15 13:08:49,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:08:49,128 INFO L225 Difference]: With dead ends: 700 [2020-09-15 13:08:49,129 INFO L226 Difference]: Without dead ends: 700 [2020-09-15 13:08:49,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2622 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2548, Invalid=5824, Unknown=0, NotChecked=0, Total=8372 [2020-09-15 13:08:49,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2020-09-15 13:08:49,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 643. [2020-09-15 13:08:49,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-09-15 13:08:49,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 874 transitions. [2020-09-15 13:08:49,147 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 874 transitions. Word has length 67 [2020-09-15 13:08:49,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:08:49,148 INFO L479 AbstractCegarLoop]: Abstraction has 643 states and 874 transitions. [2020-09-15 13:08:49,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 13:08:49,148 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 874 transitions. [2020-09-15 13:08:49,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-09-15 13:08:49,150 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:08:49,150 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:08:49,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-15 13:08:49,364 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:08:49,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:08:49,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1171001041, now seen corresponding path program 13 times [2020-09-15 13:08:49,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:08:49,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318726682] [2020-09-15 13:08:49,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:08:49,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:49,616 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 16 proven. 276 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-09-15 13:08:49,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318726682] [2020-09-15 13:08:49,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047586108] [2020-09-15 13:08:49,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:49,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:49,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 13:08:49,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:08:49,752 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 16 proven. 276 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-09-15 13:08:49,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:08:49,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-15 13:08:49,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072911244] [2020-09-15 13:08:49,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:08:49,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:08:49,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:08:49,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:08:49,754 INFO L87 Difference]: Start difference. First operand 643 states and 874 transitions. Second operand 16 states. [2020-09-15 13:08:49,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:08:49,825 INFO L93 Difference]: Finished difference Result 718 states and 970 transitions. [2020-09-15 13:08:49,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 13:08:49,826 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 74 [2020-09-15 13:08:49,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:08:49,830 INFO L225 Difference]: With dead ends: 718 [2020-09-15 13:08:49,830 INFO L226 Difference]: Without dead ends: 718 [2020-09-15 13:08:49,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:08:49,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2020-09-15 13:08:49,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 691. [2020-09-15 13:08:49,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2020-09-15 13:08:49,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 937 transitions. [2020-09-15 13:08:49,847 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 937 transitions. Word has length 74 [2020-09-15 13:08:49,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:08:49,847 INFO L479 AbstractCegarLoop]: Abstraction has 691 states and 937 transitions. [2020-09-15 13:08:49,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:08:49,847 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 937 transitions. [2020-09-15 13:08:49,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-15 13:08:49,849 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:08:49,850 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:08:50,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-15 13:08:50,064 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:08:50,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:08:50,065 INFO L82 PathProgramCache]: Analyzing trace with hash 776210049, now seen corresponding path program 14 times [2020-09-15 13:08:50,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:08:50,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108486797] [2020-09-15 13:08:50,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:08:50,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:50,348 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 16 proven. 325 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-09-15 13:08:50,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108486797] [2020-09-15 13:08:50,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894926286] [2020-09-15 13:08:50,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:50,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:08:50,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:08:50,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 13:08:50,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:08:50,521 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 16 proven. 325 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-09-15 13:08:50,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:08:50,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-15 13:08:50,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293558293] [2020-09-15 13:08:50,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 13:08:50,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:08:50,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 13:08:50,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-15 13:08:50,524 INFO L87 Difference]: Start difference. First operand 691 states and 937 transitions. Second operand 17 states. [2020-09-15 13:08:50,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:08:50,601 INFO L93 Difference]: Finished difference Result 766 states and 1033 transitions. [2020-09-15 13:08:50,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 13:08:50,602 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 78 [2020-09-15 13:08:50,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:08:50,606 INFO L225 Difference]: With dead ends: 766 [2020-09-15 13:08:50,606 INFO L226 Difference]: Without dead ends: 766 [2020-09-15 13:08:50,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-15 13:08:50,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2020-09-15 13:08:50,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 739. [2020-09-15 13:08:50,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 739 states. [2020-09-15 13:08:50,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1000 transitions. [2020-09-15 13:08:50,626 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1000 transitions. Word has length 78 [2020-09-15 13:08:50,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:08:50,627 INFO L479 AbstractCegarLoop]: Abstraction has 739 states and 1000 transitions. [2020-09-15 13:08:50,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 13:08:50,627 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1000 transitions. [2020-09-15 13:08:50,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-09-15 13:08:50,629 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:08:50,630 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:08:50,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-15 13:08:50,843 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:08:50,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:08:50,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1187324627, now seen corresponding path program 15 times [2020-09-15 13:08:50,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:08:50,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566157555] [2020-09-15 13:08:50,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:08:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:51,160 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 16 proven. 378 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-09-15 13:08:51,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566157555] [2020-09-15 13:08:51,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961697847] [2020-09-15 13:08:51,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:51,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-15 13:08:51,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:08:51,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 13:08:51,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:08:51,458 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-09-15 13:08:51,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:08:51,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 24 [2020-09-15 13:08:51,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547047997] [2020-09-15 13:08:51,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 13:08:51,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:08:51,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 13:08:51,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2020-09-15 13:08:51,460 INFO L87 Difference]: Start difference. First operand 739 states and 1000 transitions. Second operand 24 states. [2020-09-15 13:08:56,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:08:56,246 INFO L93 Difference]: Finished difference Result 952 states and 1260 transitions. [2020-09-15 13:08:56,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2020-09-15 13:08:56,247 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 82 [2020-09-15 13:08:56,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:08:56,251 INFO L225 Difference]: With dead ends: 952 [2020-09-15 13:08:56,252 INFO L226 Difference]: Without dead ends: 952 [2020-09-15 13:08:56,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5558 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4896, Invalid=11616, Unknown=0, NotChecked=0, Total=16512 [2020-09-15 13:08:56,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2020-09-15 13:08:56,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 886. [2020-09-15 13:08:56,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 886 states. [2020-09-15 13:08:56,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1184 transitions. [2020-09-15 13:08:56,276 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1184 transitions. Word has length 82 [2020-09-15 13:08:56,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:08:56,277 INFO L479 AbstractCegarLoop]: Abstraction has 886 states and 1184 transitions. [2020-09-15 13:08:56,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 13:08:56,277 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1184 transitions. [2020-09-15 13:08:56,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-15 13:08:56,280 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:08:56,280 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:08:56,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:56,494 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:08:56,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:08:56,495 INFO L82 PathProgramCache]: Analyzing trace with hash -933866561, now seen corresponding path program 16 times [2020-09-15 13:08:56,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:08:56,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447062761] [2020-09-15 13:08:56,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:08:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:56,841 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 19 proven. 435 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-09-15 13:08:56,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447062761] [2020-09-15 13:08:56,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910172003] [2020-09-15 13:08:56,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:57,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:08:57,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:08:57,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 13:08:57,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:08:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 19 proven. 435 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-09-15 13:08:57,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:08:57,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-15 13:08:57,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71121401] [2020-09-15 13:08:57,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 13:08:57,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:08:57,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 13:08:57,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-09-15 13:08:57,201 INFO L87 Difference]: Start difference. First operand 886 states and 1184 transitions. Second operand 19 states. [2020-09-15 13:08:57,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:08:57,302 INFO L93 Difference]: Finished difference Result 970 states and 1290 transitions. [2020-09-15 13:08:57,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 13:08:57,303 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 89 [2020-09-15 13:08:57,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:08:57,307 INFO L225 Difference]: With dead ends: 970 [2020-09-15 13:08:57,307 INFO L226 Difference]: Without dead ends: 970 [2020-09-15 13:08:57,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-09-15 13:08:57,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-09-15 13:08:57,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 940. [2020-09-15 13:08:57,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 940 states. [2020-09-15 13:08:57,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1254 transitions. [2020-09-15 13:08:57,326 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1254 transitions. Word has length 89 [2020-09-15 13:08:57,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:08:57,326 INFO L479 AbstractCegarLoop]: Abstraction has 940 states and 1254 transitions. [2020-09-15 13:08:57,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 13:08:57,327 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1254 transitions. [2020-09-15 13:08:57,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-09-15 13:08:57,329 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:08:57,330 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:08:57,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-15 13:08:57,543 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:08:57,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:08:57,544 INFO L82 PathProgramCache]: Analyzing trace with hash -365776851, now seen corresponding path program 17 times [2020-09-15 13:08:57,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:08:57,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767818501] [2020-09-15 13:08:57,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:08:57,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:57,918 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 19 proven. 496 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-09-15 13:08:57,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767818501] [2020-09-15 13:08:57,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883010976] [2020-09-15 13:08:57,918 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:58,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-09-15 13:08:58,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:08:58,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 13:08:58,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:08:58,167 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 19 proven. 496 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-09-15 13:08:58,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:08:58,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 13:08:58,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410712796] [2020-09-15 13:08:58,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 13:08:58,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:08:58,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 13:08:58,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:08:58,170 INFO L87 Difference]: Start difference. First operand 940 states and 1254 transitions. Second operand 20 states. [2020-09-15 13:08:58,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:08:58,276 INFO L93 Difference]: Finished difference Result 1024 states and 1360 transitions. [2020-09-15 13:08:58,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 13:08:58,277 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 93 [2020-09-15 13:08:58,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:08:58,282 INFO L225 Difference]: With dead ends: 1024 [2020-09-15 13:08:58,282 INFO L226 Difference]: Without dead ends: 1024 [2020-09-15 13:08:58,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:08:58,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2020-09-15 13:08:58,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 994. [2020-09-15 13:08:58,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 994 states. [2020-09-15 13:08:58,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1324 transitions. [2020-09-15 13:08:58,303 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1324 transitions. Word has length 93 [2020-09-15 13:08:58,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:08:58,303 INFO L479 AbstractCegarLoop]: Abstraction has 994 states and 1324 transitions. [2020-09-15 13:08:58,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 13:08:58,303 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1324 transitions. [2020-09-15 13:08:58,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-15 13:08:58,306 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:08:58,306 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:08:58,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:58,521 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:08:58,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:08:58,522 INFO L82 PathProgramCache]: Analyzing trace with hash -728816229, now seen corresponding path program 18 times [2020-09-15 13:08:58,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:08:58,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991034918] [2020-09-15 13:08:58,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:08:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:58,950 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 19 proven. 561 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-09-15 13:08:58,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991034918] [2020-09-15 13:08:58,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275555824] [2020-09-15 13:08:58,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:59,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-09-15 13:08:59,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:08:59,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:08:59,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:08:59,546 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2020-09-15 13:08:59,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:08:59,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10] total 28 [2020-09-15 13:08:59,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492696653] [2020-09-15 13:08:59,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 13:08:59,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:08:59,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 13:08:59,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-09-15 13:08:59,549 INFO L87 Difference]: Start difference. First operand 994 states and 1324 transitions. Second operand 28 states. [2020-09-15 13:09:07,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:09:07,321 INFO L93 Difference]: Finished difference Result 1240 states and 1621 transitions. [2020-09-15 13:09:07,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2020-09-15 13:09:07,322 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 97 [2020-09-15 13:09:07,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:09:07,328 INFO L225 Difference]: With dead ends: 1240 [2020-09-15 13:09:07,328 INFO L226 Difference]: Without dead ends: 1240 [2020-09-15 13:09:07,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10432 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=8550, Invalid=20862, Unknown=0, NotChecked=0, Total=29412 [2020-09-15 13:09:07,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2020-09-15 13:09:07,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1165. [2020-09-15 13:09:07,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1165 states. [2020-09-15 13:09:07,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 1536 transitions. [2020-09-15 13:09:07,359 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 1536 transitions. Word has length 97 [2020-09-15 13:09:07,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:09:07,359 INFO L479 AbstractCegarLoop]: Abstraction has 1165 states and 1536 transitions. [2020-09-15 13:09:07,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 13:09:07,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 1536 transitions. [2020-09-15 13:09:07,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-09-15 13:09:07,363 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:09:07,363 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:09:07,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:09:07,576 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:09:07,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:09:07,577 INFO L82 PathProgramCache]: Analyzing trace with hash 110062427, now seen corresponding path program 19 times [2020-09-15 13:09:07,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:09:07,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061781570] [2020-09-15 13:09:07,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:09:07,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:09:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 22 proven. 630 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-09-15 13:09:07,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061781570] [2020-09-15 13:09:07,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560173523] [2020-09-15 13:09:07,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:09:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:09:08,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 13:09:08,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:09:08,184 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 22 proven. 630 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-09-15 13:09:08,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:09:08,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 13:09:08,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178016855] [2020-09-15 13:09:08,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 13:09:08,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:09:08,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 13:09:08,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-09-15 13:09:08,186 INFO L87 Difference]: Start difference. First operand 1165 states and 1536 transitions. Second operand 22 states. [2020-09-15 13:09:08,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:09:08,301 INFO L93 Difference]: Finished difference Result 1258 states and 1652 transitions. [2020-09-15 13:09:08,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 13:09:08,302 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 104 [2020-09-15 13:09:08,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:09:08,306 INFO L225 Difference]: With dead ends: 1258 [2020-09-15 13:09:08,307 INFO L226 Difference]: Without dead ends: 1258 [2020-09-15 13:09:08,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-09-15 13:09:08,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2020-09-15 13:09:08,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1225. [2020-09-15 13:09:08,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1225 states. [2020-09-15 13:09:08,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 1613 transitions. [2020-09-15 13:09:08,327 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 1613 transitions. Word has length 104 [2020-09-15 13:09:08,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:09:08,327 INFO L479 AbstractCegarLoop]: Abstraction has 1225 states and 1613 transitions. [2020-09-15 13:09:08,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 13:09:08,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 1613 transitions. [2020-09-15 13:09:08,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-09-15 13:09:08,331 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:09:08,331 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:09:08,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-15 13:09:08,545 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:09:08,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:09:08,546 INFO L82 PathProgramCache]: Analyzing trace with hash -912464595, now seen corresponding path program 20 times [2020-09-15 13:09:08,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:09:08,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799509452] [2020-09-15 13:09:08,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:09:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:09:09,024 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 22 proven. 703 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-09-15 13:09:09,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799509452] [2020-09-15 13:09:09,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073116116] [2020-09-15 13:09:09,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:09:09,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:09:09,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:09:09,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 13:09:09,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:09:09,230 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 22 proven. 703 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-09-15 13:09:09,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:09:09,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 13:09:09,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598093210] [2020-09-15 13:09:09,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 13:09:09,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:09:09,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 13:09:09,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-15 13:09:09,232 INFO L87 Difference]: Start difference. First operand 1225 states and 1613 transitions. Second operand 23 states. [2020-09-15 13:09:09,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:09:09,336 INFO L93 Difference]: Finished difference Result 1285 states and 1690 transitions. [2020-09-15 13:09:09,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 13:09:09,337 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 108 [2020-09-15 13:09:09,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:09:09,341 INFO L225 Difference]: With dead ends: 1285 [2020-09-15 13:09:09,341 INFO L226 Difference]: Without dead ends: 1285 [2020-09-15 13:09:09,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-15 13:09:09,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2020-09-15 13:09:09,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1285. [2020-09-15 13:09:09,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1285 states. [2020-09-15 13:09:09,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 1690 transitions. [2020-09-15 13:09:09,361 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 1690 transitions. Word has length 108 [2020-09-15 13:09:09,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:09:09,361 INFO L479 AbstractCegarLoop]: Abstraction has 1285 states and 1690 transitions. [2020-09-15 13:09:09,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 13:09:09,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 1690 transitions. [2020-09-15 13:09:09,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-09-15 13:09:09,365 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:09:09,365 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:09:09,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:09:09,578 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:09:09,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:09:09,579 INFO L82 PathProgramCache]: Analyzing trace with hash -220912129, now seen corresponding path program 21 times [2020-09-15 13:09:09,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:09:09,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027394841] [2020-09-15 13:09:09,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:09:09,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:09:09,878 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 13:09:09,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027394841] [2020-09-15 13:09:09,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461847823] [2020-09-15 13:09:09,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:09:10,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-15 13:09:10,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:09:10,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 13:09:10,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:09:10,161 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 13:09:10,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:09:10,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-15 13:09:10,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181426502] [2020-09-15 13:09:10,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:09:10,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:09:10,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:09:10,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:09:10,163 INFO L87 Difference]: Start difference. First operand 1285 states and 1690 transitions. Second operand 12 states. [2020-09-15 13:09:10,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:09:10,223 INFO L93 Difference]: Finished difference Result 1460 states and 1896 transitions. [2020-09-15 13:09:10,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 13:09:10,224 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 112 [2020-09-15 13:09:10,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:09:10,230 INFO L225 Difference]: With dead ends: 1460 [2020-09-15 13:09:10,230 INFO L226 Difference]: Without dead ends: 1460 [2020-09-15 13:09:10,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:09:10,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2020-09-15 13:09:10,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1414. [2020-09-15 13:09:10,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1414 states. [2020-09-15 13:09:10,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 1846 transitions. [2020-09-15 13:09:10,256 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 1846 transitions. Word has length 112 [2020-09-15 13:09:10,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:09:10,257 INFO L479 AbstractCegarLoop]: Abstraction has 1414 states and 1846 transitions. [2020-09-15 13:09:10,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:09:10,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 1846 transitions. [2020-09-15 13:09:10,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-09-15 13:09:10,263 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:09:10,263 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:09:10,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-15 13:09:10,476 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:09:10,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:09:10,477 INFO L82 PathProgramCache]: Analyzing trace with hash 2018487717, now seen corresponding path program 22 times [2020-09-15 13:09:10,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:09:10,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411014944] [2020-09-15 13:09:10,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:09:10,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:09:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 13:09:10,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411014944] [2020-09-15 13:09:10,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166379286] [2020-09-15 13:09:10,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:09:11,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:09:11,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:09:11,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 13:09:11,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:09:11,898 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 13:09:11,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:09:11,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-15 13:09:11,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820091295] [2020-09-15 13:09:11,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 13:09:11,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:09:11,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 13:09:11,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-09-15 13:09:11,900 INFO L87 Difference]: Start difference. First operand 1414 states and 1846 transitions. Second operand 13 states. [2020-09-15 13:09:11,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:09:11,999 INFO L93 Difference]: Finished difference Result 1589 states and 2052 transitions. [2020-09-15 13:09:11,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 13:09:11,999 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 115 [2020-09-15 13:09:11,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:09:12,005 INFO L225 Difference]: With dead ends: 1589 [2020-09-15 13:09:12,006 INFO L226 Difference]: Without dead ends: 1589 [2020-09-15 13:09:12,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-09-15 13:09:12,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2020-09-15 13:09:12,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1543. [2020-09-15 13:09:12,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-09-15 13:09:12,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2002 transitions. [2020-09-15 13:09:12,028 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2002 transitions. Word has length 115 [2020-09-15 13:09:12,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:09:12,029 INFO L479 AbstractCegarLoop]: Abstraction has 1543 states and 2002 transitions. [2020-09-15 13:09:12,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 13:09:12,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2002 transitions. [2020-09-15 13:09:12,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-09-15 13:09:12,034 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:09:12,034 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:09:12,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-15 13:09:12,249 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:09:12,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:09:12,250 INFO L82 PathProgramCache]: Analyzing trace with hash -2042676161, now seen corresponding path program 23 times [2020-09-15 13:09:12,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:09:12,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557250444] [2020-09-15 13:09:12,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:09:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:09:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 13:09:12,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557250444] [2020-09-15 13:09:12,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958067187] [2020-09-15 13:09:12,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:09:12,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-09-15 13:09:12,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:09:12,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 13:09:12,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:09:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 13:09:12,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:09:12,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-15 13:09:12,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818442281] [2020-09-15 13:09:12,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 13:09:12,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:09:12,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 13:09:12,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-09-15 13:09:12,897 INFO L87 Difference]: Start difference. First operand 1543 states and 2002 transitions. Second operand 14 states. [2020-09-15 13:09:12,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:09:12,976 INFO L93 Difference]: Finished difference Result 1718 states and 2208 transitions. [2020-09-15 13:09:12,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:09:12,976 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 118 [2020-09-15 13:09:12,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:09:12,982 INFO L225 Difference]: With dead ends: 1718 [2020-09-15 13:09:12,983 INFO L226 Difference]: Without dead ends: 1718 [2020-09-15 13:09:12,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-09-15 13:09:12,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2020-09-15 13:09:13,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1672. [2020-09-15 13:09:13,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1672 states. [2020-09-15 13:09:13,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2158 transitions. [2020-09-15 13:09:13,009 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2158 transitions. Word has length 118 [2020-09-15 13:09:13,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:09:13,010 INFO L479 AbstractCegarLoop]: Abstraction has 1672 states and 2158 transitions. [2020-09-15 13:09:13,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 13:09:13,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2158 transitions. [2020-09-15 13:09:13,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-09-15 13:09:13,014 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:09:13,014 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:09:13,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:09:13,228 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:09:13,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:09:13,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1052962661, now seen corresponding path program 24 times [2020-09-15 13:09:13,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:09:13,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143580204] [2020-09-15 13:09:13,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:09:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:09:13,567 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 13:09:13,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143580204] [2020-09-15 13:09:13,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460577415] [2020-09-15 13:09:13,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:09:13,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-09-15 13:09:13,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:09:13,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 13:09:13,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:09:14,051 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 13:09:14,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:09:14,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-15 13:09:14,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183637089] [2020-09-15 13:09:14,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 13:09:14,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:09:14,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 13:09:14,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-09-15 13:09:14,053 INFO L87 Difference]: Start difference. First operand 1672 states and 2158 transitions. Second operand 15 states. [2020-09-15 13:09:14,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:09:14,157 INFO L93 Difference]: Finished difference Result 1847 states and 2364 transitions. [2020-09-15 13:09:14,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 13:09:14,158 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2020-09-15 13:09:14,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:09:14,165 INFO L225 Difference]: With dead ends: 1847 [2020-09-15 13:09:14,165 INFO L226 Difference]: Without dead ends: 1847 [2020-09-15 13:09:14,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-09-15 13:09:14,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2020-09-15 13:09:14,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1801. [2020-09-15 13:09:14,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1801 states. [2020-09-15 13:09:14,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2314 transitions. [2020-09-15 13:09:14,191 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2314 transitions. Word has length 121 [2020-09-15 13:09:14,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:09:14,192 INFO L479 AbstractCegarLoop]: Abstraction has 1801 states and 2314 transitions. [2020-09-15 13:09:14,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 13:09:14,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2314 transitions. [2020-09-15 13:09:14,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-09-15 13:09:14,196 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:09:14,196 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:09:14,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-15 13:09:14,410 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:09:14,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:09:14,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1691329151, now seen corresponding path program 25 times [2020-09-15 13:09:14,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:09:14,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365296808] [2020-09-15 13:09:14,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:09:14,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:09:14,796 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 13:09:14,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365296808] [2020-09-15 13:09:14,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378185299] [2020-09-15 13:09:14,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:09:14,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:09:14,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 13:09:14,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:09:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 13:09:15,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:09:15,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-15 13:09:15,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279043275] [2020-09-15 13:09:15,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:09:15,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:09:15,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:09:15,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:09:15,016 INFO L87 Difference]: Start difference. First operand 1801 states and 2314 transitions. Second operand 16 states. [2020-09-15 13:09:15,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:09:15,163 INFO L93 Difference]: Finished difference Result 1976 states and 2520 transitions. [2020-09-15 13:09:15,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 13:09:15,164 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 124 [2020-09-15 13:09:15,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:09:15,173 INFO L225 Difference]: With dead ends: 1976 [2020-09-15 13:09:15,173 INFO L226 Difference]: Without dead ends: 1976 [2020-09-15 13:09:15,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:09:15,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2020-09-15 13:09:15,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1930. [2020-09-15 13:09:15,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1930 states. [2020-09-15 13:09:15,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2470 transitions. [2020-09-15 13:09:15,207 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2470 transitions. Word has length 124 [2020-09-15 13:09:15,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:09:15,207 INFO L479 AbstractCegarLoop]: Abstraction has 1930 states and 2470 transitions. [2020-09-15 13:09:15,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:09:15,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2470 transitions. [2020-09-15 13:09:15,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-09-15 13:09:15,212 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:09:15,212 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:09:15,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:09:15,426 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:09:15,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:09:15,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1152246053, now seen corresponding path program 26 times [2020-09-15 13:09:15,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:09:15,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040646176] [2020-09-15 13:09:15,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:09:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:09:15,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 13:09:15,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040646176] [2020-09-15 13:09:15,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681920809] [2020-09-15 13:09:15,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:09:16,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:09:16,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:09:16,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 13:09:16,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:09:16,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 13:09:16,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:09:16,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-15 13:09:16,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576780905] [2020-09-15 13:09:16,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 13:09:16,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:09:16,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 13:09:16,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-15 13:09:16,140 INFO L87 Difference]: Start difference. First operand 1930 states and 2470 transitions. Second operand 17 states. [2020-09-15 13:09:16,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:09:16,251 INFO L93 Difference]: Finished difference Result 2105 states and 2676 transitions. [2020-09-15 13:09:16,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 13:09:16,252 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 127 [2020-09-15 13:09:16,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:09:16,269 INFO L225 Difference]: With dead ends: 2105 [2020-09-15 13:09:16,269 INFO L226 Difference]: Without dead ends: 2105 [2020-09-15 13:09:16,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-15 13:09:16,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2020-09-15 13:09:16,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 2059. [2020-09-15 13:09:16,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2059 states. [2020-09-15 13:09:16,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 2626 transitions. [2020-09-15 13:09:16,312 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 2626 transitions. Word has length 127 [2020-09-15 13:09:16,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:09:16,312 INFO L479 AbstractCegarLoop]: Abstraction has 2059 states and 2626 transitions. [2020-09-15 13:09:16,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 13:09:16,313 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 2626 transitions. [2020-09-15 13:09:16,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-09-15 13:09:16,319 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:09:16,319 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:09:16,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-15 13:09:16,534 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:09:16,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:09:16,535 INFO L82 PathProgramCache]: Analyzing trace with hash 210393279, now seen corresponding path program 27 times [2020-09-15 13:09:16,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:09:16,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265308933] [2020-09-15 13:09:16,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:09:16,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:09:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 13:09:17,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265308933] [2020-09-15 13:09:17,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290266291] [2020-09-15 13:09:17,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:09:17,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-09-15 13:09:17,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:09:17,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 13:09:17,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:09:17,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 13:09:17,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:09:17,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-15 13:09:17,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025395240] [2020-09-15 13:09:17,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 13:09:17,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:09:17,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 13:09:17,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-15 13:09:17,598 INFO L87 Difference]: Start difference. First operand 2059 states and 2626 transitions. Second operand 18 states. [2020-09-15 13:09:17,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:09:17,686 INFO L93 Difference]: Finished difference Result 2234 states and 2832 transitions. [2020-09-15 13:09:17,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 13:09:17,687 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 130 [2020-09-15 13:09:17,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:09:17,699 INFO L225 Difference]: With dead ends: 2234 [2020-09-15 13:09:17,699 INFO L226 Difference]: Without dead ends: 2234 [2020-09-15 13:09:17,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-15 13:09:17,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2020-09-15 13:09:17,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2188. [2020-09-15 13:09:17,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2188 states. [2020-09-15 13:09:17,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 2782 transitions. [2020-09-15 13:09:17,738 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 2782 transitions. Word has length 130 [2020-09-15 13:09:17,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:09:17,739 INFO L479 AbstractCegarLoop]: Abstraction has 2188 states and 2782 transitions. [2020-09-15 13:09:17,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 13:09:17,739 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 2782 transitions. [2020-09-15 13:09:17,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-09-15 13:09:17,747 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:09:17,747 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:09:17,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-15 13:09:17,962 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:09:17,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:09:17,963 INFO L82 PathProgramCache]: Analyzing trace with hash 495747813, now seen corresponding path program 28 times [2020-09-15 13:09:17,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:09:17,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709536563] [2020-09-15 13:09:17,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:09:18,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:09:18,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 13:09:18,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709536563] [2020-09-15 13:09:18,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641966537] [2020-09-15 13:09:18,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:09:19,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:09:19,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:09:19,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 13:09:19,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:09:19,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 13:09:19,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:09:19,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-15 13:09:19,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946050401] [2020-09-15 13:09:19,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 13:09:19,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:09:19,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 13:09:19,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-09-15 13:09:19,882 INFO L87 Difference]: Start difference. First operand 2188 states and 2782 transitions. Second operand 19 states. [2020-09-15 13:09:19,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:09:19,993 INFO L93 Difference]: Finished difference Result 2363 states and 2988 transitions. [2020-09-15 13:09:19,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 13:09:19,994 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 133 [2020-09-15 13:09:19,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:09:20,003 INFO L225 Difference]: With dead ends: 2363 [2020-09-15 13:09:20,003 INFO L226 Difference]: Without dead ends: 2363 [2020-09-15 13:09:20,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-09-15 13:09:20,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2020-09-15 13:09:20,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 2317. [2020-09-15 13:09:20,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2317 states. [2020-09-15 13:09:20,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 2938 transitions. [2020-09-15 13:09:20,035 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 2938 transitions. Word has length 133 [2020-09-15 13:09:20,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:09:20,035 INFO L479 AbstractCegarLoop]: Abstraction has 2317 states and 2938 transitions. [2020-09-15 13:09:20,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 13:09:20,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 2938 transitions. [2020-09-15 13:09:20,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-15 13:09:20,040 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:09:20,040 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:09:20,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:09:20,254 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:09:20,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:09:20,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1752391423, now seen corresponding path program 29 times [2020-09-15 13:09:20,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:09:20,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238833165] [2020-09-15 13:09:20,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:09:20,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:09:20,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 13:09:20,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238833165] [2020-09-15 13:09:20,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449331914] [2020-09-15 13:09:20,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:09:21,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-09-15 13:09:21,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:09:21,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 13:09:21,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:09:21,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 13:09:21,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:09:21,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 13:09:21,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389927312] [2020-09-15 13:09:21,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 13:09:21,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:09:21,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 13:09:21,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:09:21,193 INFO L87 Difference]: Start difference. First operand 2317 states and 2938 transitions. Second operand 20 states. [2020-09-15 13:09:21,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:09:21,311 INFO L93 Difference]: Finished difference Result 2492 states and 3144 transitions. [2020-09-15 13:09:21,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 13:09:21,311 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 136 [2020-09-15 13:09:21,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:09:21,319 INFO L225 Difference]: With dead ends: 2492 [2020-09-15 13:09:21,319 INFO L226 Difference]: Without dead ends: 2492 [2020-09-15 13:09:21,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:09:21,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2020-09-15 13:09:21,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 2446. [2020-09-15 13:09:21,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2446 states. [2020-09-15 13:09:21,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2446 states to 2446 states and 3094 transitions. [2020-09-15 13:09:21,356 INFO L78 Accepts]: Start accepts. Automaton has 2446 states and 3094 transitions. Word has length 136 [2020-09-15 13:09:21,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:09:21,356 INFO L479 AbstractCegarLoop]: Abstraction has 2446 states and 3094 transitions. [2020-09-15 13:09:21,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 13:09:21,357 INFO L276 IsEmpty]: Start isEmpty. Operand 2446 states and 3094 transitions. [2020-09-15 13:09:21,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-15 13:09:21,361 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:09:21,361 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:09:21,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:09:21,574 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:09:21,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:09:21,575 INFO L82 PathProgramCache]: Analyzing trace with hash -807742299, now seen corresponding path program 30 times [2020-09-15 13:09:21,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:09:21,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126413407] [2020-09-15 13:09:21,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:09:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:09:22,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 13:09:22,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126413407] [2020-09-15 13:09:22,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174438657] [2020-09-15 13:09:22,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:09:22,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-09-15 13:09:22,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:09:22,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 13:09:22,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:09:22,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 13:09:22,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:09:22,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-15 13:09:22,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191639404] [2020-09-15 13:09:22,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 13:09:22,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:09:22,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 13:09:22,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-09-15 13:09:22,678 INFO L87 Difference]: Start difference. First operand 2446 states and 3094 transitions. Second operand 21 states. [2020-09-15 13:09:22,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:09:22,780 INFO L93 Difference]: Finished difference Result 2621 states and 3300 transitions. [2020-09-15 13:09:22,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 13:09:22,781 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 139 [2020-09-15 13:09:22,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:09:22,785 INFO L225 Difference]: With dead ends: 2621 [2020-09-15 13:09:22,786 INFO L226 Difference]: Without dead ends: 2621 [2020-09-15 13:09:22,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-09-15 13:09:22,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2621 states. [2020-09-15 13:09:22,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2621 to 2575. [2020-09-15 13:09:22,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2575 states. [2020-09-15 13:09:22,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 3250 transitions. [2020-09-15 13:09:22,819 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 3250 transitions. Word has length 139 [2020-09-15 13:09:22,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:09:22,819 INFO L479 AbstractCegarLoop]: Abstraction has 2575 states and 3250 transitions. [2020-09-15 13:09:22,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 13:09:22,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 3250 transitions. [2020-09-15 13:09:22,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-09-15 13:09:22,824 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:09:22,825 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:09:23,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-15 13:09:23,034 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:09:23,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:09:23,035 INFO L82 PathProgramCache]: Analyzing trace with hash 277787967, now seen corresponding path program 31 times [2020-09-15 13:09:23,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:09:23,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735629042] [2020-09-15 13:09:23,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:09:23,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:09:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 13:09:23,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735629042] [2020-09-15 13:09:23,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494241692] [2020-09-15 13:09:23,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:09:23,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:09:23,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 13:09:23,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:09:23,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 13:09:23,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:09:23,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 13:09:23,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005744696] [2020-09-15 13:09:23,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 13:09:23,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:09:23,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 13:09:23,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-09-15 13:09:23,760 INFO L87 Difference]: Start difference. First operand 2575 states and 3250 transitions. Second operand 22 states. [2020-09-15 13:09:23,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:09:23,923 INFO L93 Difference]: Finished difference Result 2750 states and 3456 transitions. [2020-09-15 13:09:23,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 13:09:23,923 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 142 [2020-09-15 13:09:23,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:09:23,930 INFO L225 Difference]: With dead ends: 2750 [2020-09-15 13:09:23,930 INFO L226 Difference]: Without dead ends: 2750 [2020-09-15 13:09:23,931 INFO L675 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 [2020-09-15 13:09:23,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2020-09-15 13:09:23,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 2704. [2020-09-15 13:09:23,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2704 states. [2020-09-15 13:09:23,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2704 states to 2704 states and 3406 transitions. [2020-09-15 13:09:23,965 INFO L78 Accepts]: Start accepts. Automaton has 2704 states and 3406 transitions. Word has length 142 [2020-09-15 13:09:23,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:09:23,966 INFO L479 AbstractCegarLoop]: Abstraction has 2704 states and 3406 transitions. [2020-09-15 13:09:23,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 13:09:23,966 INFO L276 IsEmpty]: Start isEmpty. Operand 2704 states and 3406 transitions. [2020-09-15 13:09:23,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-09-15 13:09:23,972 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:09:23,973 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:09:24,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:09:24,187 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:09:24,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:09:24,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1793796507, now seen corresponding path program 32 times [2020-09-15 13:09:24,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:09:24,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355338772] [2020-09-15 13:09:24,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:09:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:09:24,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 13:09:24,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355338772] [2020-09-15 13:09:24,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935653929] [2020-09-15 13:09:24,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:09:24,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:09:24,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:09:24,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 13:09:24,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:09:24,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-15 13:09:24,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:09:24,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 13:09:24,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156019116] [2020-09-15 13:09:24,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 13:09:24,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:09:24,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 13:09:24,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-15 13:09:24,992 INFO L87 Difference]: Start difference. First operand 2704 states and 3406 transitions. Second operand 23 states. [2020-09-15 13:09:25,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:09:25,138 INFO L93 Difference]: Finished difference Result 2833 states and 3562 transitions. [2020-09-15 13:09:25,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 13:09:25,139 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 145 [2020-09-15 13:09:25,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:09:25,145 INFO L225 Difference]: With dead ends: 2833 [2020-09-15 13:09:25,145 INFO L226 Difference]: Without dead ends: 2833 [2020-09-15 13:09:25,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-15 13:09:25,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2020-09-15 13:09:25,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 2833. [2020-09-15 13:09:25,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2833 states. [2020-09-15 13:09:25,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2833 states to 2833 states and 3562 transitions. [2020-09-15 13:09:25,173 INFO L78 Accepts]: Start accepts. Automaton has 2833 states and 3562 transitions. Word has length 145 [2020-09-15 13:09:25,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:09:25,173 INFO L479 AbstractCegarLoop]: Abstraction has 2833 states and 3562 transitions. [2020-09-15 13:09:25,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 13:09:25,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2833 states and 3562 transitions. [2020-09-15 13:09:25,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-15 13:09:25,177 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:09:25,177 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:09:25,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-15 13:09:25,378 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:09:25,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:09:25,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1981785217, now seen corresponding path program 33 times [2020-09-15 13:09:25,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:09:25,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017052907] [2020-09-15 13:09:25,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:09:25,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:09:28,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:09:28,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017052907] [2020-09-15 13:09:28,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030505568] [2020-09-15 13:09:28,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:09:29,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-09-15 13:09:29,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:09:29,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-15 13:09:29,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:09:29,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:09:29,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:09:29,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-15 13:09:29,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508618819] [2020-09-15 13:09:29,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-15 13:09:29,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:09:29,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-15 13:09:29,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-15 13:09:29,919 INFO L87 Difference]: Start difference. First operand 2833 states and 3562 transitions. Second operand 63 states. [2020-09-15 13:11:09,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:11:09,913 INFO L93 Difference]: Finished difference Result 32926 states and 45933 transitions. [2020-09-15 13:11:09,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 633 states. [2020-09-15 13:11:09,914 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-15 13:11:09,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:11:09,975 INFO L225 Difference]: With dead ends: 32926 [2020-09-15 13:11:09,976 INFO L226 Difference]: Without dead ends: 32924 [2020-09-15 13:11:10,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 632 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162735 ImplicationChecksByTransitivity, 38.7s TimeCoverageRelationStatistics Valid=2407, Invalid=398915, Unknown=0, NotChecked=0, Total=401322 [2020-09-15 13:11:10,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32924 states. [2020-09-15 13:11:10,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32924 to 2967. [2020-09-15 13:11:10,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2967 states. [2020-09-15 13:11:10,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2967 states to 2967 states and 3794 transitions. [2020-09-15 13:11:10,348 INFO L78 Accepts]: Start accepts. Automaton has 2967 states and 3794 transitions. Word has length 148 [2020-09-15 13:11:10,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:11:10,348 INFO L479 AbstractCegarLoop]: Abstraction has 2967 states and 3794 transitions. [2020-09-15 13:11:10,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-15 13:11:10,349 INFO L276 IsEmpty]: Start isEmpty. Operand 2967 states and 3794 transitions. [2020-09-15 13:11:10,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-15 13:11:10,354 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:11:10,355 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:11:10,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-09-15 13:11:10,570 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:11:10,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:11:10,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1970430061, now seen corresponding path program 34 times [2020-09-15 13:11:10,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:11:10,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193225690] [2020-09-15 13:11:10,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:11:10,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:11:14,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:11:14,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193225690] [2020-09-15 13:11:14,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296351542] [2020-09-15 13:11:14,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:11:16,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:11:16,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:11:16,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-15 13:11:16,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:11:16,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:11:16,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:11:16,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-15 13:11:16,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174860007] [2020-09-15 13:11:16,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-15 13:11:16,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:11:16,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-15 13:11:16,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-15 13:11:16,874 INFO L87 Difference]: Start difference. First operand 2967 states and 3794 transitions. Second operand 63 states. [2020-09-15 13:13:03,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:13:03,300 INFO L93 Difference]: Finished difference Result 30945 states and 43173 transitions. [2020-09-15 13:13:03,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-09-15 13:13:03,301 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-15 13:13:03,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:13:03,357 INFO L225 Difference]: With dead ends: 30945 [2020-09-15 13:13:03,357 INFO L226 Difference]: Without dead ends: 30943 [2020-09-15 13:13:03,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 41.0s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-09-15 13:13:03,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30943 states. [2020-09-15 13:13:03,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30943 to 2973. [2020-09-15 13:13:03,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2973 states. [2020-09-15 13:13:03,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 3801 transitions. [2020-09-15 13:13:03,749 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 3801 transitions. Word has length 148 [2020-09-15 13:13:03,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:13:03,752 INFO L479 AbstractCegarLoop]: Abstraction has 2973 states and 3801 transitions. [2020-09-15 13:13:03,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-15 13:13:03,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 3801 transitions. [2020-09-15 13:13:03,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-15 13:13:03,760 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:13:03,760 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:13:03,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-15 13:13:03,975 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:13:03,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:13:03,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1092472257, now seen corresponding path program 35 times [2020-09-15 13:13:03,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:13:03,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242841059] [2020-09-15 13:13:03,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:13:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:13:08,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:13:08,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242841059] [2020-09-15 13:13:08,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512021042] [2020-09-15 13:13:08,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:13:08,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-09-15 13:13:08,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:13:08,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-15 13:13:08,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:13:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:13:08,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:13:08,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-15 13:13:08,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939586806] [2020-09-15 13:13:08,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-15 13:13:08,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:13:08,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-15 13:13:08,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-15 13:13:08,625 INFO L87 Difference]: Start difference. First operand 2973 states and 3801 transitions. Second operand 63 states. [2020-09-15 13:15:00,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:15:00,229 INFO L93 Difference]: Finished difference Result 30939 states and 43164 transitions. [2020-09-15 13:15:00,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-09-15 13:15:00,231 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-15 13:15:00,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:15:00,278 INFO L225 Difference]: With dead ends: 30939 [2020-09-15 13:15:00,278 INFO L226 Difference]: Without dead ends: 30937 [2020-09-15 13:15:00,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 43.1s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-09-15 13:15:00,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30937 states. [2020-09-15 13:15:00,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30937 to 2979. [2020-09-15 13:15:00,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2979 states. [2020-09-15 13:15:00,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2979 states to 2979 states and 3808 transitions. [2020-09-15 13:15:00,481 INFO L78 Accepts]: Start accepts. Automaton has 2979 states and 3808 transitions. Word has length 148 [2020-09-15 13:15:00,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:15:00,483 INFO L479 AbstractCegarLoop]: Abstraction has 2979 states and 3808 transitions. [2020-09-15 13:15:00,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-15 13:15:00,484 INFO L276 IsEmpty]: Start isEmpty. Operand 2979 states and 3808 transitions. [2020-09-15 13:15:00,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-15 13:15:00,490 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:15:00,491 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:15:00,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-15 13:15:00,706 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:15:00,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:15:00,707 INFO L82 PathProgramCache]: Analyzing trace with hash 769524141, now seen corresponding path program 36 times [2020-09-15 13:15:00,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:15:00,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001549941] [2020-09-15 13:15:00,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:15:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:15:05,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:15:05,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001549941] [2020-09-15 13:15:05,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554427968] [2020-09-15 13:15:05,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:15:06,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-09-15 13:15:06,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:15:06,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-15 13:15:06,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:15:06,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:15:06,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:15:06,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-15 13:15:06,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011341811] [2020-09-15 13:15:06,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-15 13:15:06,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:15:06,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-15 13:15:06,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-15 13:15:06,258 INFO L87 Difference]: Start difference. First operand 2979 states and 3808 transitions. Second operand 63 states. [2020-09-15 13:17:02,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:02,901 INFO L93 Difference]: Finished difference Result 30933 states and 43155 transitions. [2020-09-15 13:17:02,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-09-15 13:17:02,903 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-15 13:17:02,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:02,940 INFO L225 Difference]: With dead ends: 30933 [2020-09-15 13:17:02,941 INFO L226 Difference]: Without dead ends: 30931 [2020-09-15 13:17:02,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 45.3s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-09-15 13:17:03,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30931 states. [2020-09-15 13:17:03,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30931 to 2985. [2020-09-15 13:17:03,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2985 states. [2020-09-15 13:17:03,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2985 states to 2985 states and 3815 transitions. [2020-09-15 13:17:03,140 INFO L78 Accepts]: Start accepts. Automaton has 2985 states and 3815 transitions. Word has length 148 [2020-09-15 13:17:03,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:03,141 INFO L479 AbstractCegarLoop]: Abstraction has 2985 states and 3815 transitions. [2020-09-15 13:17:03,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-15 13:17:03,141 INFO L276 IsEmpty]: Start isEmpty. Operand 2985 states and 3815 transitions. [2020-09-15 13:17:03,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-15 13:17:03,146 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:03,146 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:03,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-15 13:17:03,361 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:17:03,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:03,362 INFO L82 PathProgramCache]: Analyzing trace with hash -188999425, now seen corresponding path program 37 times [2020-09-15 13:17:03,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:03,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942982402] [2020-09-15 13:17:03,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:03,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:08,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:17:08,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942982402] [2020-09-15 13:17:08,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379477845] [2020-09-15 13:17:08,065 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:17:08,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:08,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-15 13:17:08,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:17:08,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:17:08,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:17:08,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-15 13:17:08,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174272919] [2020-09-15 13:17:08,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-15 13:17:08,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:08,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-15 13:17:08,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-15 13:17:08,431 INFO L87 Difference]: Start difference. First operand 2985 states and 3815 transitions. Second operand 63 states. [2020-09-15 13:17:20,203 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-09-15 13:19:14,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:19:14,074 INFO L93 Difference]: Finished difference Result 30927 states and 43146 transitions. [2020-09-15 13:19:14,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-09-15 13:19:14,076 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-15 13:19:14,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:19:14,118 INFO L225 Difference]: With dead ends: 30927 [2020-09-15 13:19:14,119 INFO L226 Difference]: Without dead ends: 30925 [2020-09-15 13:19:14,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 48.4s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-09-15 13:19:14,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30925 states. [2020-09-15 13:19:14,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30925 to 2991. [2020-09-15 13:19:14,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2991 states. [2020-09-15 13:19:14,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 3822 transitions. [2020-09-15 13:19:14,368 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 3822 transitions. Word has length 148 [2020-09-15 13:19:14,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:19:14,368 INFO L479 AbstractCegarLoop]: Abstraction has 2991 states and 3822 transitions. [2020-09-15 13:19:14,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-15 13:19:14,369 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 3822 transitions. [2020-09-15 13:19:14,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-15 13:19:14,376 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:19:14,376 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:19:14,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-15 13:19:14,589 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:19:14,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:19:14,590 INFO L82 PathProgramCache]: Analyzing trace with hash 48993005, now seen corresponding path program 38 times [2020-09-15 13:19:14,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:19:14,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981918997] [2020-09-15 13:19:14,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:19:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:19:20,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:19:20,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981918997] [2020-09-15 13:19:20,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774726236] [2020-09-15 13:19:20,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:19:20,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:19:20,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:19:20,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-15 13:19:20,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:19:20,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:19:20,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:19:20,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-15 13:19:20,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571903217] [2020-09-15 13:19:20,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-15 13:19:20,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:19:20,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-15 13:19:20,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-15 13:19:20,785 INFO L87 Difference]: Start difference. First operand 2991 states and 3822 transitions. Second operand 63 states.