/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-bf4350c [2020-09-17 01:53:45,490 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-17 01:53:45,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-17 01:53:45,536 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-17 01:53:45,536 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-17 01:53:45,544 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-17 01:53:45,547 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-17 01:53:45,551 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-17 01:53:45,554 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-17 01:53:45,558 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-17 01:53:45,559 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-17 01:53:45,560 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-17 01:53:45,560 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-17 01:53:45,563 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-17 01:53:45,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-17 01:53:45,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-17 01:53:45,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-17 01:53:45,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-17 01:53:45,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-17 01:53:45,582 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-17 01:53:45,584 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-17 01:53:45,585 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-17 01:53:45,586 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-17 01:53:45,587 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-17 01:53:45,600 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-17 01:53:45,600 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-17 01:53:45,600 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-17 01:53:45,604 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-17 01:53:45,605 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-17 01:53:45,609 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-17 01:53:45,609 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-17 01:53:45,610 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-17 01:53:45,611 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-17 01:53:45,611 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-17 01:53:45,616 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-17 01:53:45,616 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-17 01:53:45,617 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-17 01:53:45,617 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-17 01:53:45,617 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-17 01:53:45,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-17 01:53:45,620 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-17 01:53:45,622 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-17 01:53:45,658 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-17 01:53:45,658 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-17 01:53:45,660 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-17 01:53:45,660 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-17 01:53:45,660 INFO L138 SettingsManager]: * Use SBE=true [2020-09-17 01:53:45,660 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-17 01:53:45,661 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-17 01:53:45,661 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-17 01:53:45,661 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-17 01:53:45,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-17 01:53:45,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-17 01:53:45,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-17 01:53:45,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-17 01:53:45,662 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-17 01:53:45,662 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-17 01:53:45,662 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-17 01:53:45,663 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-17 01:53:45,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-17 01:53:45,663 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-17 01:53:45,663 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-17 01:53:45,663 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-17 01:53:45,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-17 01:53:45,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-17 01:53:45,664 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-17 01:53:45,664 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-17 01:53:45,665 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-17 01:53:45,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-17 01:53:45,665 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-17 01:53:45,665 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-17 01:53:45,665 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-17 01:53:46,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-17 01:53:46,139 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-17 01:53:46,143 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-17 01:53:46,145 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-17 01:53:46,145 INFO L275 PluginConnector]: CDTParser initialized [2020-09-17 01:53:46,146 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-09-17 01:53:46,223 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef214192a/f614665e964747e9a53132b3e2df66b6/FLAGe07b73d4a [2020-09-17 01:53:46,876 INFO L306 CDTParser]: Found 1 translation units. [2020-09-17 01:53:46,877 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-09-17 01:53:46,898 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef214192a/f614665e964747e9a53132b3e2df66b6/FLAGe07b73d4a [2020-09-17 01:53:47,086 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef214192a/f614665e964747e9a53132b3e2df66b6 [2020-09-17 01:53:47,102 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-17 01:53:47,106 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-17 01:53:47,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-17 01:53:47,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-17 01:53:47,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-17 01:53:47,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 01:53:47" (1/1) ... [2020-09-17 01:53:47,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f912d48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 01:53:47, skipping insertion in model container [2020-09-17 01:53:47,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 01:53:47" (1/1) ... [2020-09-17 01:53:47,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-17 01:53:47,182 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-17 01:53:47,901 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-17 01:53:47,919 INFO L203 MainTranslator]: Completed pre-run [2020-09-17 01:53:47,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-17 01:53:48,195 INFO L208 MainTranslator]: Completed translation [2020-09-17 01:53:48,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 01:53:48 WrapperNode [2020-09-17 01:53:48,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-17 01:53:48,197 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-17 01:53:48,198 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-17 01:53:48,198 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-17 01:53:48,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 01:53:48" (1/1) ... [2020-09-17 01:53:48,235 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 01:53:48" (1/1) ... [2020-09-17 01:53:48,261 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-17 01:53:48,261 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-17 01:53:48,261 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-17 01:53:48,262 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-17 01:53:48,271 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 01:53:48" (1/1) ... [2020-09-17 01:53:48,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 01:53:48" (1/1) ... [2020-09-17 01:53:48,275 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 01:53:48" (1/1) ... [2020-09-17 01:53:48,276 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 01:53:48" (1/1) ... [2020-09-17 01:53:48,282 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 01:53:48" (1/1) ... [2020-09-17 01:53:48,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 01:53:48" (1/1) ... [2020-09-17 01:53:48,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 01:53:48" (1/1) ... [2020-09-17 01:53:48,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-17 01:53:48,295 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-17 01:53:48,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-17 01:53:48,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-17 01:53:48,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 01:53:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-17 01:53:48,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-17 01:53:48,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-17 01:53:48,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-17 01:53:48,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-17 01:53:48,368 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-09-17 01:53:48,369 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2020-09-17 01:53:48,369 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2020-09-17 01:53:48,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-17 01:53:48,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-17 01:53:48,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-17 01:53:48,372 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-17 01:53:48,801 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-17 01:53:48,801 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-09-17 01:53:48,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 01:53:48 BoogieIcfgContainer [2020-09-17 01:53:48,806 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-17 01:53:48,807 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-17 01:53:48,807 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-17 01:53:48,811 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-17 01:53:48,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 01:53:47" (1/3) ... [2020-09-17 01:53:48,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67b43ba4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 01:53:48, skipping insertion in model container [2020-09-17 01:53:48,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 01:53:48" (2/3) ... [2020-09-17 01:53:48,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67b43ba4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 01:53:48, skipping insertion in model container [2020-09-17 01:53:48,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 01:53:48" (3/3) ... [2020-09-17 01:53:48,815 INFO L109 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2020-09-17 01:53:48,826 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-17 01:53:48,826 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-17 01:53:48,837 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-17 01:53:48,838 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-17 01:53:48,864 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:48,864 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:48,864 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:48,864 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:48,865 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:48,865 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:48,865 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:48,865 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:48,866 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:48,866 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:48,866 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:48,866 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:48,867 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:48,867 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:48,867 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:48,867 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:48,868 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:48,868 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:48,868 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:48,868 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:48,869 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:48,869 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:48,869 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:48,873 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:48,873 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:48,874 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:48,874 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:48,874 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:48,874 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:48,875 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:48,875 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:48,875 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 01:53:48,907 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-17 01:53:48,933 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-17 01:53:48,934 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-17 01:53:48,934 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-17 01:53:48,934 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-17 01:53:48,934 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-17 01:53:48,934 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-17 01:53:48,934 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-17 01:53:48,935 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-17 01:53:48,953 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 81 transitions, 170 flow [2020-09-17 01:53:48,955 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 170 flow [2020-09-17 01:53:49,011 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2020-09-17 01:53:49,011 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-17 01:53:49,017 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. [2020-09-17 01:53:49,020 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 170 flow [2020-09-17 01:53:49,042 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2020-09-17 01:53:49,043 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-17 01:53:49,044 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. [2020-09-17 01:53:49,045 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 646 [2020-09-17 01:53:49,047 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-09-17 01:53:51,020 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-09-17 01:53:51,189 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-09-17 01:53:51,857 WARN L193 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 110 [2020-09-17 01:53:52,151 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-09-17 01:53:52,160 INFO L206 etLargeBlockEncoding]: Checked pairs total: 738 [2020-09-17 01:53:52,160 INFO L214 etLargeBlockEncoding]: Total number of compositions: 70 [2020-09-17 01:53:52,165 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 19 places, 17 transitions, 42 flow [2020-09-17 01:53:52,175 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2020-09-17 01:53:52,177 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-09-17 01:53:52,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-17 01:53:52,186 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:53:52,187 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:53:52,187 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:53:52,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:53:52,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1717538151, now seen corresponding path program 1 times [2020-09-17 01:53:52,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:53:52,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177564697] [2020-09-17 01:53:52,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:53:52,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:53:52,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 01:53:52,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177564697] [2020-09-17 01:53:52,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 01:53:52,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-17 01:53:52,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057407819] [2020-09-17 01:53:52,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-17 01:53:52,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:53:52,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-17 01:53:52,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-17 01:53:52,476 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-09-17 01:53:52,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:53:52,520 INFO L93 Difference]: Finished difference Result 52 states and 100 transitions. [2020-09-17 01:53:52,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-17 01:53:52,522 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-09-17 01:53:52,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:53:52,537 INFO L225 Difference]: With dead ends: 52 [2020-09-17 01:53:52,538 INFO L226 Difference]: Without dead ends: 52 [2020-09-17 01:53:52,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-17 01:53:52,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-17 01:53:52,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-09-17 01:53:52,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-17 01:53:52,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2020-09-17 01:53:52,588 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 8 [2020-09-17 01:53:52,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:53:52,588 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2020-09-17 01:53:52,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-17 01:53:52,589 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2020-09-17 01:53:52,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 01:53:52,590 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:53:52,590 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:53:52,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-17 01:53:52,591 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:53:52,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:53:52,591 INFO L82 PathProgramCache]: Analyzing trace with hash 62706239, now seen corresponding path program 1 times [2020-09-17 01:53:52,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:53:52,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060747048] [2020-09-17 01:53:52,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:53:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:53:52,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 01:53:52,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060747048] [2020-09-17 01:53:52,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 01:53:52,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-17 01:53:52,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526714562] [2020-09-17 01:53:52,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-17 01:53:52,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:53:52,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-17 01:53:52,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-17 01:53:52,691 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand 3 states. [2020-09-17 01:53:52,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:53:52,724 INFO L93 Difference]: Finished difference Result 64 states and 124 transitions. [2020-09-17 01:53:52,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-17 01:53:52,726 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-09-17 01:53:52,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:53:52,727 INFO L225 Difference]: With dead ends: 64 [2020-09-17 01:53:52,728 INFO L226 Difference]: Without dead ends: 64 [2020-09-17 01:53:52,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-17 01:53:52,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-17 01:53:52,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2020-09-17 01:53:52,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 01:53:52,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 88 transitions. [2020-09-17 01:53:52,737 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 88 transitions. Word has length 11 [2020-09-17 01:53:52,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:53:52,737 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 88 transitions. [2020-09-17 01:53:52,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-17 01:53:52,737 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 88 transitions. [2020-09-17 01:53:52,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 01:53:52,738 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:53:52,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:53:52,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-17 01:53:52,759 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:53:52,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:53:52,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1954756591, now seen corresponding path program 1 times [2020-09-17 01:53:52,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:53:52,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191260599] [2020-09-17 01:53:52,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:53:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:53:52,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 01:53:52,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191260599] [2020-09-17 01:53:52,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 01:53:52,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-17 01:53:52,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116572267] [2020-09-17 01:53:52,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-17 01:53:52,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:53:52,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-17 01:53:52,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-17 01:53:52,891 INFO L87 Difference]: Start difference. First operand 46 states and 88 transitions. Second operand 3 states. [2020-09-17 01:53:52,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:53:52,911 INFO L93 Difference]: Finished difference Result 40 states and 66 transitions. [2020-09-17 01:53:52,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-17 01:53:52,911 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-09-17 01:53:52,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:53:52,912 INFO L225 Difference]: With dead ends: 40 [2020-09-17 01:53:52,912 INFO L226 Difference]: Without dead ends: 40 [2020-09-17 01:53:52,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-17 01:53:52,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-17 01:53:52,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-09-17 01:53:52,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-17 01:53:52,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 66 transitions. [2020-09-17 01:53:52,918 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 66 transitions. Word has length 15 [2020-09-17 01:53:52,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:53:52,919 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 66 transitions. [2020-09-17 01:53:52,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-17 01:53:52,919 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 66 transitions. [2020-09-17 01:53:52,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 01:53:52,920 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:53:52,920 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:53:52,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-17 01:53:52,920 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:53:52,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:53:52,921 INFO L82 PathProgramCache]: Analyzing trace with hash 525517821, now seen corresponding path program 2 times [2020-09-17 01:53:52,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:53:52,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018173307] [2020-09-17 01:53:52,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:53:52,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:53:52,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 01:53:52,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018173307] [2020-09-17 01:53:52,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042182060] [2020-09-17 01:53:52,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:53:53,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 01:53:53,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:53:53,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2020-09-17 01:53:53,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:53:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 01:53:53,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:53:53,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-09-17 01:53:53,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521555441] [2020-09-17 01:53:53,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-17 01:53:53,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:53:53,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-17 01:53:53,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-17 01:53:53,123 INFO L87 Difference]: Start difference. First operand 40 states and 66 transitions. Second operand 6 states. [2020-09-17 01:53:53,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:53:53,230 INFO L93 Difference]: Finished difference Result 104 states and 159 transitions. [2020-09-17 01:53:53,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 01:53:53,230 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-09-17 01:53:53,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:53:53,232 INFO L225 Difference]: With dead ends: 104 [2020-09-17 01:53:53,232 INFO L226 Difference]: Without dead ends: 104 [2020-09-17 01:53:53,232 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 [2020-09-17 01:53:53,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-17 01:53:53,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 79. [2020-09-17 01:53:53,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-17 01:53:53,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 124 transitions. [2020-09-17 01:53:53,245 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 124 transitions. Word has length 15 [2020-09-17 01:53:53,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:53:53,245 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 124 transitions. [2020-09-17 01:53:53,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-17 01:53:53,245 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 124 transitions. [2020-09-17 01:53:53,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 01:53:53,247 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:53:53,247 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:53:53,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:53:53,462 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:53:53,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:53:53,463 INFO L82 PathProgramCache]: Analyzing trace with hash 485096059, now seen corresponding path program 3 times [2020-09-17 01:53:53,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:53:53,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195480274] [2020-09-17 01:53:53,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:53:53,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:53:53,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-17 01:53:53,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195480274] [2020-09-17 01:53:53,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135455679] [2020-09-17 01:53:53,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:53:53,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 01:53:53,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:53:53,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-17 01:53:53,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:53:53,688 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-17 01:53:53,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:53:53,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-09-17 01:53:53,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591559167] [2020-09-17 01:53:53,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 01:53:53,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:53:53,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 01:53:53,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-17 01:53:53,692 INFO L87 Difference]: Start difference. First operand 79 states and 124 transitions. Second operand 8 states. [2020-09-17 01:53:53,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:53:53,918 INFO L93 Difference]: Finished difference Result 160 states and 236 transitions. [2020-09-17 01:53:53,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 01:53:53,919 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-09-17 01:53:53,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:53:53,921 INFO L225 Difference]: With dead ends: 160 [2020-09-17 01:53:53,921 INFO L226 Difference]: Without dead ends: 160 [2020-09-17 01:53:53,921 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 [2020-09-17 01:53:53,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-17 01:53:53,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 130. [2020-09-17 01:53:53,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-17 01:53:53,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 196 transitions. [2020-09-17 01:53:53,933 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 196 transitions. Word has length 22 [2020-09-17 01:53:53,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:53:53,934 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 196 transitions. [2020-09-17 01:53:53,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 01:53:53,934 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 196 transitions. [2020-09-17 01:53:53,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 01:53:53,936 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:53:53,936 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:53:54,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:53:54,151 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:53:54,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:53:54,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1548321815, now seen corresponding path program 4 times [2020-09-17 01:53:54,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:53:54,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563828645] [2020-09-17 01:53:54,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:53:54,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:53:54,262 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-17 01:53:54,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563828645] [2020-09-17 01:53:54,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096142117] [2020-09-17 01:53:54,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:53:54,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 01:53:54,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:53:54,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2020-09-17 01:53:54,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:53:54,373 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-17 01:53:54,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:53:54,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-17 01:53:54,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870528413] [2020-09-17 01:53:54,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-17 01:53:54,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:53:54,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-17 01:53:54,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-09-17 01:53:54,376 INFO L87 Difference]: Start difference. First operand 130 states and 196 transitions. Second operand 7 states. [2020-09-17 01:53:54,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:53:54,406 INFO L93 Difference]: Finished difference Result 178 states and 262 transitions. [2020-09-17 01:53:54,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-17 01:53:54,407 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-09-17 01:53:54,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:53:54,409 INFO L225 Difference]: With dead ends: 178 [2020-09-17 01:53:54,409 INFO L226 Difference]: Without dead ends: 178 [2020-09-17 01:53:54,410 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 [2020-09-17 01:53:54,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-09-17 01:53:54,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 160. [2020-09-17 01:53:54,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-17 01:53:54,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 238 transitions. [2020-09-17 01:53:54,422 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 238 transitions. Word has length 29 [2020-09-17 01:53:54,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:53:54,423 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 238 transitions. [2020-09-17 01:53:54,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-17 01:53:54,423 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 238 transitions. [2020-09-17 01:53:54,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 01:53:54,425 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:53:54,425 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:53:54,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:53:54,640 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:53:54,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:53:54,641 INFO L82 PathProgramCache]: Analyzing trace with hash -2012714619, now seen corresponding path program 5 times [2020-09-17 01:53:54,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:53:54,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720051305] [2020-09-17 01:53:54,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:53:54,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:53:54,769 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-17 01:53:54,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720051305] [2020-09-17 01:53:54,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060258737] [2020-09-17 01:53:54,770 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:53:54,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-17 01:53:54,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:53:54,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-17 01:53:54,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:53:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-17 01:53:54,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:53:54,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-17 01:53:54,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755843855] [2020-09-17 01:53:54,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 01:53:54,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:53:54,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 01:53:54,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-09-17 01:53:54,923 INFO L87 Difference]: Start difference. First operand 160 states and 238 transitions. Second operand 8 states. [2020-09-17 01:53:54,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:53:54,964 INFO L93 Difference]: Finished difference Result 208 states and 304 transitions. [2020-09-17 01:53:54,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-17 01:53:54,964 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-09-17 01:53:54,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:53:54,966 INFO L225 Difference]: With dead ends: 208 [2020-09-17 01:53:54,966 INFO L226 Difference]: Without dead ends: 208 [2020-09-17 01:53:54,967 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 [2020-09-17 01:53:54,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-17 01:53:54,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 190. [2020-09-17 01:53:54,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-09-17 01:53:54,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 280 transitions. [2020-09-17 01:53:54,993 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 280 transitions. Word has length 33 [2020-09-17 01:53:54,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:53:54,994 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 280 transitions. [2020-09-17 01:53:54,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 01:53:54,994 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 280 transitions. [2020-09-17 01:53:54,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-17 01:53:54,999 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:53:55,000 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:53:55,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:53:55,216 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:53:55,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:53:55,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1171974131, now seen corresponding path program 6 times [2020-09-17 01:53:55,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:53:55,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865129231] [2020-09-17 01:53:55,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:53:55,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:53:55,325 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-17 01:53:55,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865129231] [2020-09-17 01:53:55,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533380211] [2020-09-17 01:53:55,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:53:55,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-17 01:53:55,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:53:55,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2020-09-17 01:53:55,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:53:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-09-17 01:53:55,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:53:55,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-09-17 01:53:55,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882408533] [2020-09-17 01:53:55,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 01:53:55,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:53:55,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 01:53:55,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-09-17 01:53:55,495 INFO L87 Difference]: Start difference. First operand 190 states and 280 transitions. Second operand 12 states. [2020-09-17 01:53:56,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:53:56,053 INFO L93 Difference]: Finished difference Result 304 states and 429 transitions. [2020-09-17 01:53:56,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 01:53:56,057 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-09-17 01:53:56,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:53:56,059 INFO L225 Difference]: With dead ends: 304 [2020-09-17 01:53:56,059 INFO L226 Difference]: Without dead ends: 304 [2020-09-17 01:53:56,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=420, Invalid=840, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 01:53:56,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-09-17 01:53:56,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 265. [2020-09-17 01:53:56,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-09-17 01:53:56,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 380 transitions. [2020-09-17 01:53:56,070 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 380 transitions. Word has length 37 [2020-09-17 01:53:56,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:53:56,071 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 380 transitions. [2020-09-17 01:53:56,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 01:53:56,071 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 380 transitions. [2020-09-17 01:53:56,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-17 01:53:56,073 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:53:56,074 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:53:56,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:53:56,288 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:53:56,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:53:56,289 INFO L82 PathProgramCache]: Analyzing trace with hash -870694653, now seen corresponding path program 7 times [2020-09-17 01:53:56,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:53:56,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498023465] [2020-09-17 01:53:56,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:53:56,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:53:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-17 01:53:56,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498023465] [2020-09-17 01:53:56,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753241757] [2020-09-17 01:53:56,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:53:56,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:53:56,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 01:53:56,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:53:56,556 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-17 01:53:56,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:53:56,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-17 01:53:56,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563789594] [2020-09-17 01:53:56,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 01:53:56,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:53:56,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 01:53:56,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-09-17 01:53:56,559 INFO L87 Difference]: Start difference. First operand 265 states and 380 transitions. Second operand 10 states. [2020-09-17 01:53:56,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:53:56,609 INFO L93 Difference]: Finished difference Result 322 states and 456 transitions. [2020-09-17 01:53:56,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-17 01:53:56,609 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-09-17 01:53:56,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:53:56,611 INFO L225 Difference]: With dead ends: 322 [2020-09-17 01:53:56,611 INFO L226 Difference]: Without dead ends: 322 [2020-09-17 01:53:56,614 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 [2020-09-17 01:53:56,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-09-17 01:53:56,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 301. [2020-09-17 01:53:56,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-09-17 01:53:56,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 429 transitions. [2020-09-17 01:53:56,623 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 429 transitions. Word has length 44 [2020-09-17 01:53:56,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:53:56,624 INFO L479 AbstractCegarLoop]: Abstraction has 301 states and 429 transitions. [2020-09-17 01:53:56,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 01:53:56,624 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 429 transitions. [2020-09-17 01:53:56,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-17 01:53:56,630 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:53:56,631 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:53:56,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:53:56,845 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:53:56,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:53:56,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1422004693, now seen corresponding path program 8 times [2020-09-17 01:53:56,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:53:56,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793225048] [2020-09-17 01:53:56,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:53:56,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:53:56,994 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 10 proven. 91 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-17 01:53:56,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793225048] [2020-09-17 01:53:56,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823084681] [2020-09-17 01:53:56,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:53:57,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 01:53:57,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:53:57,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 01:53:57,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:53:57,105 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 10 proven. 91 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-17 01:53:57,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:53:57,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-17 01:53:57,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846784998] [2020-09-17 01:53:57,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 01:53:57,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:53:57,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 01:53:57,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-17 01:53:57,107 INFO L87 Difference]: Start difference. First operand 301 states and 429 transitions. Second operand 11 states. [2020-09-17 01:53:57,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:53:57,144 INFO L93 Difference]: Finished difference Result 358 states and 505 transitions. [2020-09-17 01:53:57,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 01:53:57,145 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-09-17 01:53:57,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:53:57,147 INFO L225 Difference]: With dead ends: 358 [2020-09-17 01:53:57,147 INFO L226 Difference]: Without dead ends: 358 [2020-09-17 01:53:57,148 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 [2020-09-17 01:53:57,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-09-17 01:53:57,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 337. [2020-09-17 01:53:57,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-09-17 01:53:57,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 478 transitions. [2020-09-17 01:53:57,156 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 478 transitions. Word has length 48 [2020-09-17 01:53:57,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:53:57,157 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 478 transitions. [2020-09-17 01:53:57,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 01:53:57,157 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 478 transitions. [2020-09-17 01:53:57,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-17 01:53:57,158 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:53:57,158 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:53:57,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-17 01:53:57,373 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:53:57,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:53:57,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1332663897, now seen corresponding path program 9 times [2020-09-17 01:53:57,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:53:57,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906327436] [2020-09-17 01:53:57,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:53:57,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:53:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 10 proven. 120 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-17 01:53:57,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906327436] [2020-09-17 01:53:57,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903451980] [2020-09-17 01:53:57,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:53:57,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-17 01:53:57,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:53:57,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-17 01:53:57,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:53:57,733 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-09-17 01:53:57,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:53:57,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2020-09-17 01:53:57,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382541946] [2020-09-17 01:53:57,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 01:53:57,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:53:57,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 01:53:57,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-09-17 01:53:57,735 INFO L87 Difference]: Start difference. First operand 337 states and 478 transitions. Second operand 16 states. [2020-09-17 01:53:59,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:53:59,063 INFO L93 Difference]: Finished difference Result 484 states and 664 transitions. [2020-09-17 01:53:59,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-09-17 01:53:59,068 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-09-17 01:53:59,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:53:59,070 INFO L225 Difference]: With dead ends: 484 [2020-09-17 01:53:59,071 INFO L226 Difference]: Without dead ends: 484 [2020-09-17 01:53:59,073 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 [2020-09-17 01:53:59,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-09-17 01:53:59,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 436. [2020-09-17 01:53:59,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2020-09-17 01:53:59,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 606 transitions. [2020-09-17 01:53:59,085 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 606 transitions. Word has length 52 [2020-09-17 01:53:59,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:53:59,085 INFO L479 AbstractCegarLoop]: Abstraction has 436 states and 606 transitions. [2020-09-17 01:53:59,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 01:53:59,085 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 606 transitions. [2020-09-17 01:53:59,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-17 01:53:59,087 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:53:59,087 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:53:59,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-09-17 01:53:59,302 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:53:59,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:53:59,303 INFO L82 PathProgramCache]: Analyzing trace with hash 298647787, now seen corresponding path program 10 times [2020-09-17 01:53:59,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:53:59,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915101139] [2020-09-17 01:53:59,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:53:59,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:53:59,473 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 13 proven. 153 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-17 01:53:59,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915101139] [2020-09-17 01:53:59,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014723997] [2020-09-17 01:53:59,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:53:59,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 01:53:59,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:53:59,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 01:53:59,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:53:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 13 proven. 153 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-17 01:53:59,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:53:59,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-17 01:53:59,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611583903] [2020-09-17 01:53:59,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 01:53:59,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:53:59,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 01:53:59,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-09-17 01:53:59,656 INFO L87 Difference]: Start difference. First operand 436 states and 606 transitions. Second operand 13 states. [2020-09-17 01:53:59,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:53:59,698 INFO L93 Difference]: Finished difference Result 502 states and 692 transitions. [2020-09-17 01:53:59,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 01:53:59,699 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 59 [2020-09-17 01:53:59,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:53:59,702 INFO L225 Difference]: With dead ends: 502 [2020-09-17 01:53:59,702 INFO L226 Difference]: Without dead ends: 502 [2020-09-17 01:53:59,702 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 [2020-09-17 01:53:59,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-09-17 01:53:59,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 478. [2020-09-17 01:53:59,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 478 states. [2020-09-17 01:53:59,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 662 transitions. [2020-09-17 01:53:59,713 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 662 transitions. Word has length 59 [2020-09-17 01:53:59,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:53:59,714 INFO L479 AbstractCegarLoop]: Abstraction has 478 states and 662 transitions. [2020-09-17 01:53:59,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 01:53:59,714 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 662 transitions. [2020-09-17 01:53:59,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-17 01:53:59,716 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:53:59,716 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:53:59,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:53:59,931 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:53:59,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:53:59,932 INFO L82 PathProgramCache]: Analyzing trace with hash -734842407, now seen corresponding path program 11 times [2020-09-17 01:53:59,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:53:59,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624053385] [2020-09-17 01:53:59,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:53:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:00,127 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 13 proven. 190 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-17 01:54:00,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624053385] [2020-09-17 01:54:00,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229991091] [2020-09-17 01:54:00,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:00,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-17 01:54:00,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:54:00,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 01:54:00,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 13 proven. 190 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-17 01:54:00,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:00,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-17 01:54:00,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902743474] [2020-09-17 01:54:00,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 01:54:00,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:00,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 01:54:00,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-09-17 01:54:00,278 INFO L87 Difference]: Start difference. First operand 478 states and 662 transitions. Second operand 14 states. [2020-09-17 01:54:00,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:00,340 INFO L93 Difference]: Finished difference Result 544 states and 748 transitions. [2020-09-17 01:54:00,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 01:54:00,341 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-09-17 01:54:00,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:00,343 INFO L225 Difference]: With dead ends: 544 [2020-09-17 01:54:00,344 INFO L226 Difference]: Without dead ends: 544 [2020-09-17 01:54:00,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-09-17 01:54:00,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2020-09-17 01:54:00,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 520. [2020-09-17 01:54:00,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-09-17 01:54:00,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 718 transitions. [2020-09-17 01:54:00,356 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 718 transitions. Word has length 63 [2020-09-17 01:54:00,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:00,357 INFO L479 AbstractCegarLoop]: Abstraction has 520 states and 718 transitions. [2020-09-17 01:54:00,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 01:54:00,357 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 718 transitions. [2020-09-17 01:54:00,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-17 01:54:00,358 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:00,359 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:00,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:00,573 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:00,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:00,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1524941881, now seen corresponding path program 12 times [2020-09-17 01:54:00,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:00,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321469617] [2020-09-17 01:54:00,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:00,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 13 proven. 231 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-17 01:54:00,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321469617] [2020-09-17 01:54:00,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749853422] [2020-09-17 01:54:00,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:00,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-17 01:54:00,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:54:00,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 01:54:00,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-09-17 01:54:01,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:01,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 20 [2020-09-17 01:54:01,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603735213] [2020-09-17 01:54:01,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 01:54:01,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:01,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 01:54:01,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2020-09-17 01:54:01,076 INFO L87 Difference]: Start difference. First operand 520 states and 718 transitions. Second operand 20 states. [2020-09-17 01:54:03,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:03,490 INFO L93 Difference]: Finished difference Result 700 states and 941 transitions. [2020-09-17 01:54:03,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-09-17 01:54:03,491 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 67 [2020-09-17 01:54:03,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:03,495 INFO L225 Difference]: With dead ends: 700 [2020-09-17 01:54:03,495 INFO L226 Difference]: Without dead ends: 700 [2020-09-17 01:54:03,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2622 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2548, Invalid=5824, Unknown=0, NotChecked=0, Total=8372 [2020-09-17 01:54:03,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2020-09-17 01:54:03,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 643. [2020-09-17 01:54:03,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-09-17 01:54:03,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 874 transitions. [2020-09-17 01:54:03,519 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 874 transitions. Word has length 67 [2020-09-17 01:54:03,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:03,520 INFO L479 AbstractCegarLoop]: Abstraction has 643 states and 874 transitions. [2020-09-17 01:54:03,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 01:54:03,520 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 874 transitions. [2020-09-17 01:54:03,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-09-17 01:54:03,523 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:03,523 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:03,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-17 01:54:03,736 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:03,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:03,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1171001041, now seen corresponding path program 13 times [2020-09-17 01:54:03,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:03,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216596508] [2020-09-17 01:54:03,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:03,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:04,007 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 16 proven. 276 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-09-17 01:54:04,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216596508] [2020-09-17 01:54:04,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334970158] [2020-09-17 01:54:04,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:04,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 01:54:04,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:04,166 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 16 proven. 276 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-09-17 01:54:04,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:04,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 01:54:04,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065142768] [2020-09-17 01:54:04,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 01:54:04,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:04,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 01:54:04,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-09-17 01:54:04,168 INFO L87 Difference]: Start difference. First operand 643 states and 874 transitions. Second operand 16 states. [2020-09-17 01:54:04,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:04,256 INFO L93 Difference]: Finished difference Result 718 states and 970 transitions. [2020-09-17 01:54:04,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 01:54:04,257 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 74 [2020-09-17 01:54:04,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:04,260 INFO L225 Difference]: With dead ends: 718 [2020-09-17 01:54:04,260 INFO L226 Difference]: Without dead ends: 718 [2020-09-17 01:54:04,263 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 [2020-09-17 01:54:04,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2020-09-17 01:54:04,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 691. [2020-09-17 01:54:04,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2020-09-17 01:54:04,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 937 transitions. [2020-09-17 01:54:04,278 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 937 transitions. Word has length 74 [2020-09-17 01:54:04,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:04,279 INFO L479 AbstractCegarLoop]: Abstraction has 691 states and 937 transitions. [2020-09-17 01:54:04,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 01:54:04,279 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 937 transitions. [2020-09-17 01:54:04,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-17 01:54:04,286 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:04,286 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:04,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-17 01:54:04,500 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:04,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:04,501 INFO L82 PathProgramCache]: Analyzing trace with hash 776210049, now seen corresponding path program 14 times [2020-09-17 01:54:04,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:04,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581599573] [2020-09-17 01:54:04,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:04,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 16 proven. 325 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-09-17 01:54:04,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581599573] [2020-09-17 01:54:04,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769560191] [2020-09-17 01:54:04,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:04,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 01:54:04,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:54:04,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 01:54:04,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:04,902 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 16 proven. 325 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-09-17 01:54:04,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:04,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 01:54:04,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232449660] [2020-09-17 01:54:04,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 01:54:04,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:04,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 01:54:04,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-17 01:54:04,904 INFO L87 Difference]: Start difference. First operand 691 states and 937 transitions. Second operand 17 states. [2020-09-17 01:54:04,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:04,973 INFO L93 Difference]: Finished difference Result 766 states and 1033 transitions. [2020-09-17 01:54:04,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 01:54:04,974 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 78 [2020-09-17 01:54:04,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:04,977 INFO L225 Difference]: With dead ends: 766 [2020-09-17 01:54:04,977 INFO L226 Difference]: Without dead ends: 766 [2020-09-17 01:54:04,978 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 [2020-09-17 01:54:04,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2020-09-17 01:54:04,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 739. [2020-09-17 01:54:04,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 739 states. [2020-09-17 01:54:04,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1000 transitions. [2020-09-17 01:54:04,991 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1000 transitions. Word has length 78 [2020-09-17 01:54:04,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:04,991 INFO L479 AbstractCegarLoop]: Abstraction has 739 states and 1000 transitions. [2020-09-17 01:54:04,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 01:54:04,992 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1000 transitions. [2020-09-17 01:54:04,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-09-17 01:54:04,993 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:04,994 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:05,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-17 01:54:05,209 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:05,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:05,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1187324627, now seen corresponding path program 15 times [2020-09-17 01:54:05,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:05,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403869424] [2020-09-17 01:54:05,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 16 proven. 378 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-09-17 01:54:05,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403869424] [2020-09-17 01:54:05,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344857748] [2020-09-17 01:54:05,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:05,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-17 01:54:05,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:54:05,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 01:54:05,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-09-17 01:54:05,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:05,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 24 [2020-09-17 01:54:05,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5430305] [2020-09-17 01:54:05,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 01:54:05,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:05,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 01:54:05,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2020-09-17 01:54:05,779 INFO L87 Difference]: Start difference. First operand 739 states and 1000 transitions. Second operand 24 states. [2020-09-17 01:54:10,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:10,145 INFO L93 Difference]: Finished difference Result 952 states and 1260 transitions. [2020-09-17 01:54:10,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2020-09-17 01:54:10,146 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 82 [2020-09-17 01:54:10,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:10,151 INFO L225 Difference]: With dead ends: 952 [2020-09-17 01:54:10,151 INFO L226 Difference]: Without dead ends: 952 [2020-09-17 01:54:10,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5558 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4896, Invalid=11616, Unknown=0, NotChecked=0, Total=16512 [2020-09-17 01:54:10,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2020-09-17 01:54:10,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 886. [2020-09-17 01:54:10,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 886 states. [2020-09-17 01:54:10,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1184 transitions. [2020-09-17 01:54:10,172 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1184 transitions. Word has length 82 [2020-09-17 01:54:10,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:10,172 INFO L479 AbstractCegarLoop]: Abstraction has 886 states and 1184 transitions. [2020-09-17 01:54:10,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 01:54:10,173 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1184 transitions. [2020-09-17 01:54:10,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-17 01:54:10,175 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:10,175 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:10,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:10,390 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:10,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:10,391 INFO L82 PathProgramCache]: Analyzing trace with hash -933866561, now seen corresponding path program 16 times [2020-09-17 01:54:10,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:10,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251176469] [2020-09-17 01:54:10,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:10,716 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 19 proven. 435 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-09-17 01:54:10,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251176469] [2020-09-17 01:54:10,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270641662] [2020-09-17 01:54:10,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:11,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 01:54:11,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:54:11,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 01:54:11,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:11,232 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 19 proven. 435 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-09-17 01:54:11,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:11,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 01:54:11,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078876798] [2020-09-17 01:54:11,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 01:54:11,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:11,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 01:54:11,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-09-17 01:54:11,235 INFO L87 Difference]: Start difference. First operand 886 states and 1184 transitions. Second operand 19 states. [2020-09-17 01:54:11,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:11,315 INFO L93 Difference]: Finished difference Result 970 states and 1290 transitions. [2020-09-17 01:54:11,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 01:54:11,316 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 89 [2020-09-17 01:54:11,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:11,320 INFO L225 Difference]: With dead ends: 970 [2020-09-17 01:54:11,320 INFO L226 Difference]: Without dead ends: 970 [2020-09-17 01:54:11,321 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 [2020-09-17 01:54:11,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-09-17 01:54:11,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 940. [2020-09-17 01:54:11,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 940 states. [2020-09-17 01:54:11,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1254 transitions. [2020-09-17 01:54:11,338 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1254 transitions. Word has length 89 [2020-09-17 01:54:11,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:11,338 INFO L479 AbstractCegarLoop]: Abstraction has 940 states and 1254 transitions. [2020-09-17 01:54:11,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 01:54:11,338 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1254 transitions. [2020-09-17 01:54:11,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-09-17 01:54:11,341 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:11,341 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:11,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-17 01:54:11,554 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:11,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:11,554 INFO L82 PathProgramCache]: Analyzing trace with hash -365776851, now seen corresponding path program 17 times [2020-09-17 01:54:11,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:11,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553427099] [2020-09-17 01:54:11,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:11,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:11,894 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 19 proven. 496 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-09-17 01:54:11,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553427099] [2020-09-17 01:54:11,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975005565] [2020-09-17 01:54:11,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:12,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-09-17 01:54:12,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:54:12,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 01:54:12,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:12,111 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 19 proven. 496 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-09-17 01:54:12,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:12,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 01:54:12,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720008537] [2020-09-17 01:54:12,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 01:54:12,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:12,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 01:54:12,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-17 01:54:12,113 INFO L87 Difference]: Start difference. First operand 940 states and 1254 transitions. Second operand 20 states. [2020-09-17 01:54:12,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:12,210 INFO L93 Difference]: Finished difference Result 1024 states and 1360 transitions. [2020-09-17 01:54:12,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 01:54:12,210 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 93 [2020-09-17 01:54:12,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:12,214 INFO L225 Difference]: With dead ends: 1024 [2020-09-17 01:54:12,214 INFO L226 Difference]: Without dead ends: 1024 [2020-09-17 01:54:12,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-17 01:54:12,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2020-09-17 01:54:12,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 994. [2020-09-17 01:54:12,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 994 states. [2020-09-17 01:54:12,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1324 transitions. [2020-09-17 01:54:12,230 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1324 transitions. Word has length 93 [2020-09-17 01:54:12,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:12,230 INFO L479 AbstractCegarLoop]: Abstraction has 994 states and 1324 transitions. [2020-09-17 01:54:12,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 01:54:12,230 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1324 transitions. [2020-09-17 01:54:12,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-17 01:54:12,233 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:12,233 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:12,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:12,446 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:12,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:12,447 INFO L82 PathProgramCache]: Analyzing trace with hash -728816229, now seen corresponding path program 18 times [2020-09-17 01:54:12,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:12,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857553898] [2020-09-17 01:54:12,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:12,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:12,819 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 19 proven. 561 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-09-17 01:54:12,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857553898] [2020-09-17 01:54:12,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360510051] [2020-09-17 01:54:12,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:13,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-09-17 01:54:13,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:54:13,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 01:54:13,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2020-09-17 01:54:13,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:13,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10] total 28 [2020-09-17 01:54:13,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237130815] [2020-09-17 01:54:13,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 01:54:13,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:13,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 01:54:13,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-09-17 01:54:13,283 INFO L87 Difference]: Start difference. First operand 994 states and 1324 transitions. Second operand 28 states. [2020-09-17 01:54:20,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:20,562 INFO L93 Difference]: Finished difference Result 1240 states and 1621 transitions. [2020-09-17 01:54:20,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2020-09-17 01:54:20,563 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 97 [2020-09-17 01:54:20,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:20,567 INFO L225 Difference]: With dead ends: 1240 [2020-09-17 01:54:20,567 INFO L226 Difference]: Without dead ends: 1240 [2020-09-17 01:54:20,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10432 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=8550, Invalid=20862, Unknown=0, NotChecked=0, Total=29412 [2020-09-17 01:54:20,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2020-09-17 01:54:20,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1165. [2020-09-17 01:54:20,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1165 states. [2020-09-17 01:54:20,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 1536 transitions. [2020-09-17 01:54:20,590 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 1536 transitions. Word has length 97 [2020-09-17 01:54:20,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:20,591 INFO L479 AbstractCegarLoop]: Abstraction has 1165 states and 1536 transitions. [2020-09-17 01:54:20,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 01:54:20,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 1536 transitions. [2020-09-17 01:54:20,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-09-17 01:54:20,594 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:20,594 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:20,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:20,809 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:20,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:20,809 INFO L82 PathProgramCache]: Analyzing trace with hash 110062427, now seen corresponding path program 19 times [2020-09-17 01:54:20,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:20,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368875021] [2020-09-17 01:54:20,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:20,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:21,270 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 22 proven. 630 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-09-17 01:54:21,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368875021] [2020-09-17 01:54:21,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087392992] [2020-09-17 01:54:21,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:21,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:21,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 01:54:21,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:21,541 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 22 proven. 630 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-09-17 01:54:21,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:21,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 01:54:21,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368638371] [2020-09-17 01:54:21,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 01:54:21,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:21,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 01:54:21,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-09-17 01:54:21,546 INFO L87 Difference]: Start difference. First operand 1165 states and 1536 transitions. Second operand 22 states. [2020-09-17 01:54:21,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:21,684 INFO L93 Difference]: Finished difference Result 1258 states and 1652 transitions. [2020-09-17 01:54:21,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 01:54:21,685 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 104 [2020-09-17 01:54:21,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:21,692 INFO L225 Difference]: With dead ends: 1258 [2020-09-17 01:54:21,692 INFO L226 Difference]: Without dead ends: 1258 [2020-09-17 01:54:21,693 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 [2020-09-17 01:54:21,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2020-09-17 01:54:21,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1225. [2020-09-17 01:54:21,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1225 states. [2020-09-17 01:54:21,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 1613 transitions. [2020-09-17 01:54:21,721 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 1613 transitions. Word has length 104 [2020-09-17 01:54:21,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:21,722 INFO L479 AbstractCegarLoop]: Abstraction has 1225 states and 1613 transitions. [2020-09-17 01:54:21,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 01:54:21,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 1613 transitions. [2020-09-17 01:54:21,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-09-17 01:54:21,727 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:21,727 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:21,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-17 01:54:21,942 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:21,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:21,943 INFO L82 PathProgramCache]: Analyzing trace with hash -912464595, now seen corresponding path program 20 times [2020-09-17 01:54:21,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:21,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548643066] [2020-09-17 01:54:21,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 22 proven. 703 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-09-17 01:54:22,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548643066] [2020-09-17 01:54:22,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558492657] [2020-09-17 01:54:22,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:22,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 01:54:22,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:54:22,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 01:54:22,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:22,575 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 22 proven. 703 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-09-17 01:54:22,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:22,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 01:54:22,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198973308] [2020-09-17 01:54:22,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 01:54:22,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:22,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 01:54:22,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-17 01:54:22,577 INFO L87 Difference]: Start difference. First operand 1225 states and 1613 transitions. Second operand 23 states. [2020-09-17 01:54:22,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:22,674 INFO L93 Difference]: Finished difference Result 1285 states and 1690 transitions. [2020-09-17 01:54:22,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 01:54:22,674 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 108 [2020-09-17 01:54:22,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:22,679 INFO L225 Difference]: With dead ends: 1285 [2020-09-17 01:54:22,679 INFO L226 Difference]: Without dead ends: 1285 [2020-09-17 01:54:22,679 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 [2020-09-17 01:54:22,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2020-09-17 01:54:22,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1285. [2020-09-17 01:54:22,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1285 states. [2020-09-17 01:54:22,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 1690 transitions. [2020-09-17 01:54:22,696 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 1690 transitions. Word has length 108 [2020-09-17 01:54:22,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:22,697 INFO L479 AbstractCegarLoop]: Abstraction has 1285 states and 1690 transitions. [2020-09-17 01:54:22,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 01:54:22,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 1690 transitions. [2020-09-17 01:54:22,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-09-17 01:54:22,700 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:22,700 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:22,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:22,914 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:22,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:22,914 INFO L82 PathProgramCache]: Analyzing trace with hash -220912129, now seen corresponding path program 21 times [2020-09-17 01:54:22,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:22,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348790245] [2020-09-17 01:54:22,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:23,211 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-17 01:54:23,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348790245] [2020-09-17 01:54:23,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787991993] [2020-09-17 01:54:23,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:23,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 01:54:23,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:54:23,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 01:54:23,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:23,428 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-17 01:54:23,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:23,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-17 01:54:23,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969557533] [2020-09-17 01:54:23,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 01:54:23,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:23,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 01:54:23,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-09-17 01:54:23,430 INFO L87 Difference]: Start difference. First operand 1285 states and 1690 transitions. Second operand 12 states. [2020-09-17 01:54:23,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:23,496 INFO L93 Difference]: Finished difference Result 1460 states and 1896 transitions. [2020-09-17 01:54:23,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 01:54:23,497 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 112 [2020-09-17 01:54:23,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:23,504 INFO L225 Difference]: With dead ends: 1460 [2020-09-17 01:54:23,505 INFO L226 Difference]: Without dead ends: 1460 [2020-09-17 01:54:23,505 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 [2020-09-17 01:54:23,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2020-09-17 01:54:23,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1414. [2020-09-17 01:54:23,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1414 states. [2020-09-17 01:54:23,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 1846 transitions. [2020-09-17 01:54:23,564 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 1846 transitions. Word has length 112 [2020-09-17 01:54:23,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:23,564 INFO L479 AbstractCegarLoop]: Abstraction has 1414 states and 1846 transitions. [2020-09-17 01:54:23,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 01:54:23,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 1846 transitions. [2020-09-17 01:54:23,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-09-17 01:54:23,569 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:23,569 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:23,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-17 01:54:23,784 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:23,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:23,785 INFO L82 PathProgramCache]: Analyzing trace with hash 2018487717, now seen corresponding path program 22 times [2020-09-17 01:54:23,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:23,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591066295] [2020-09-17 01:54:23,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:23,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:24,062 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-17 01:54:24,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591066295] [2020-09-17 01:54:24,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610760667] [2020-09-17 01:54:24,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:24,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 01:54:24,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:54:24,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 01:54:24,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-17 01:54:24,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:24,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-17 01:54:24,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665210118] [2020-09-17 01:54:24,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 01:54:24,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:24,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 01:54:24,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-09-17 01:54:24,706 INFO L87 Difference]: Start difference. First operand 1414 states and 1846 transitions. Second operand 13 states. [2020-09-17 01:54:24,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:24,785 INFO L93 Difference]: Finished difference Result 1589 states and 2052 transitions. [2020-09-17 01:54:24,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 01:54:24,786 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 115 [2020-09-17 01:54:24,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:24,796 INFO L225 Difference]: With dead ends: 1589 [2020-09-17 01:54:24,796 INFO L226 Difference]: Without dead ends: 1589 [2020-09-17 01:54:24,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-09-17 01:54:24,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2020-09-17 01:54:24,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1543. [2020-09-17 01:54:24,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-09-17 01:54:24,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2002 transitions. [2020-09-17 01:54:24,817 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2002 transitions. Word has length 115 [2020-09-17 01:54:24,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:24,818 INFO L479 AbstractCegarLoop]: Abstraction has 1543 states and 2002 transitions. [2020-09-17 01:54:24,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 01:54:24,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2002 transitions. [2020-09-17 01:54:24,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-09-17 01:54:24,822 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:24,823 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:25,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-17 01:54:25,037 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:25,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:25,038 INFO L82 PathProgramCache]: Analyzing trace with hash -2042676161, now seen corresponding path program 23 times [2020-09-17 01:54:25,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:25,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987200866] [2020-09-17 01:54:25,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:25,369 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-17 01:54:25,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987200866] [2020-09-17 01:54:25,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359061714] [2020-09-17 01:54:25,370 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:25,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-09-17 01:54:25,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:54:25,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 01:54:25,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:25,834 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-17 01:54:25,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:25,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-17 01:54:25,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050214653] [2020-09-17 01:54:25,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 01:54:25,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:25,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 01:54:25,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-09-17 01:54:25,837 INFO L87 Difference]: Start difference. First operand 1543 states and 2002 transitions. Second operand 14 states. [2020-09-17 01:54:25,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:25,938 INFO L93 Difference]: Finished difference Result 1718 states and 2208 transitions. [2020-09-17 01:54:25,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 01:54:25,938 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 118 [2020-09-17 01:54:25,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:25,948 INFO L225 Difference]: With dead ends: 1718 [2020-09-17 01:54:25,948 INFO L226 Difference]: Without dead ends: 1718 [2020-09-17 01:54:25,949 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 [2020-09-17 01:54:25,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2020-09-17 01:54:25,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1672. [2020-09-17 01:54:25,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1672 states. [2020-09-17 01:54:25,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2158 transitions. [2020-09-17 01:54:25,985 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2158 transitions. Word has length 118 [2020-09-17 01:54:25,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:25,986 INFO L479 AbstractCegarLoop]: Abstraction has 1672 states and 2158 transitions. [2020-09-17 01:54:25,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 01:54:25,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2158 transitions. [2020-09-17 01:54:25,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-09-17 01:54:25,992 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:25,992 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:26,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:26,206 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:26,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:26,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1052962661, now seen corresponding path program 24 times [2020-09-17 01:54:26,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:26,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661905631] [2020-09-17 01:54:26,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-17 01:54:26,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661905631] [2020-09-17 01:54:26,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646249758] [2020-09-17 01:54:26,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:26,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-09-17 01:54:26,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:54:26,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 01:54:26,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:27,017 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-17 01:54:27,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:27,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-17 01:54:27,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446563437] [2020-09-17 01:54:27,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 01:54:27,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:27,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 01:54:27,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-09-17 01:54:27,019 INFO L87 Difference]: Start difference. First operand 1672 states and 2158 transitions. Second operand 15 states. [2020-09-17 01:54:27,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:27,121 INFO L93 Difference]: Finished difference Result 1847 states and 2364 transitions. [2020-09-17 01:54:27,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 01:54:27,121 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2020-09-17 01:54:27,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:27,133 INFO L225 Difference]: With dead ends: 1847 [2020-09-17 01:54:27,133 INFO L226 Difference]: Without dead ends: 1847 [2020-09-17 01:54:27,133 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 [2020-09-17 01:54:27,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2020-09-17 01:54:27,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1801. [2020-09-17 01:54:27,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1801 states. [2020-09-17 01:54:27,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2314 transitions. [2020-09-17 01:54:27,157 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2314 transitions. Word has length 121 [2020-09-17 01:54:27,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:27,157 INFO L479 AbstractCegarLoop]: Abstraction has 1801 states and 2314 transitions. [2020-09-17 01:54:27,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 01:54:27,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2314 transitions. [2020-09-17 01:54:27,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-09-17 01:54:27,164 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:27,165 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:27,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-17 01:54:27,381 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:27,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:27,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1691329151, now seen corresponding path program 25 times [2020-09-17 01:54:27,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:27,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288144365] [2020-09-17 01:54:27,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:27,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-17 01:54:27,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288144365] [2020-09-17 01:54:27,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646709270] [2020-09-17 01:54:27,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:27,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:27,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 01:54:27,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:27,944 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-17 01:54:27,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:27,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 01:54:27,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145026675] [2020-09-17 01:54:27,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 01:54:27,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:27,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 01:54:27,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-09-17 01:54:27,948 INFO L87 Difference]: Start difference. First operand 1801 states and 2314 transitions. Second operand 16 states. [2020-09-17 01:54:28,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:28,080 INFO L93 Difference]: Finished difference Result 1976 states and 2520 transitions. [2020-09-17 01:54:28,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 01:54:28,081 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 124 [2020-09-17 01:54:28,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:28,089 INFO L225 Difference]: With dead ends: 1976 [2020-09-17 01:54:28,089 INFO L226 Difference]: Without dead ends: 1976 [2020-09-17 01:54:28,089 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 [2020-09-17 01:54:28,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2020-09-17 01:54:28,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1930. [2020-09-17 01:54:28,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1930 states. [2020-09-17 01:54:28,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2470 transitions. [2020-09-17 01:54:28,116 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2470 transitions. Word has length 124 [2020-09-17 01:54:28,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:28,116 INFO L479 AbstractCegarLoop]: Abstraction has 1930 states and 2470 transitions. [2020-09-17 01:54:28,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 01:54:28,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2470 transitions. [2020-09-17 01:54:28,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-09-17 01:54:28,121 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:28,121 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:28,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:28,336 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:28,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:28,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1152246053, now seen corresponding path program 26 times [2020-09-17 01:54:28,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:28,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281131571] [2020-09-17 01:54:28,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:28,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:28,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-17 01:54:28,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281131571] [2020-09-17 01:54:28,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365764716] [2020-09-17 01:54:28,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:28,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 01:54:28,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:54:28,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 01:54:28,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:28,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-17 01:54:28,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:28,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 01:54:28,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327099991] [2020-09-17 01:54:28,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 01:54:28,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:28,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 01:54:28,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-17 01:54:28,880 INFO L87 Difference]: Start difference. First operand 1930 states and 2470 transitions. Second operand 17 states. [2020-09-17 01:54:28,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:28,966 INFO L93 Difference]: Finished difference Result 2105 states and 2676 transitions. [2020-09-17 01:54:28,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 01:54:28,966 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 127 [2020-09-17 01:54:28,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:28,972 INFO L225 Difference]: With dead ends: 2105 [2020-09-17 01:54:28,973 INFO L226 Difference]: Without dead ends: 2105 [2020-09-17 01:54:28,973 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 [2020-09-17 01:54:28,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2020-09-17 01:54:29,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 2059. [2020-09-17 01:54:29,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2059 states. [2020-09-17 01:54:29,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 2626 transitions. [2020-09-17 01:54:29,010 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 2626 transitions. Word has length 127 [2020-09-17 01:54:29,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:29,011 INFO L479 AbstractCegarLoop]: Abstraction has 2059 states and 2626 transitions. [2020-09-17 01:54:29,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 01:54:29,011 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 2626 transitions. [2020-09-17 01:54:29,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-09-17 01:54:29,016 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:29,016 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:29,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-17 01:54:29,231 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:29,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:29,232 INFO L82 PathProgramCache]: Analyzing trace with hash 210393279, now seen corresponding path program 27 times [2020-09-17 01:54:29,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:29,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36781337] [2020-09-17 01:54:29,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:29,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:29,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-17 01:54:29,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36781337] [2020-09-17 01:54:29,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788872156] [2020-09-17 01:54:29,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:30,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-09-17 01:54:30,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:54:30,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 01:54:30,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:30,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-17 01:54:30,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:30,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 01:54:30,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232475915] [2020-09-17 01:54:30,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 01:54:30,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:30,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 01:54:30,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-17 01:54:30,183 INFO L87 Difference]: Start difference. First operand 2059 states and 2626 transitions. Second operand 18 states. [2020-09-17 01:54:30,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:30,255 INFO L93 Difference]: Finished difference Result 2234 states and 2832 transitions. [2020-09-17 01:54:30,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 01:54:30,256 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 130 [2020-09-17 01:54:30,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:30,264 INFO L225 Difference]: With dead ends: 2234 [2020-09-17 01:54:30,264 INFO L226 Difference]: Without dead ends: 2234 [2020-09-17 01:54:30,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-17 01:54:30,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2020-09-17 01:54:30,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2188. [2020-09-17 01:54:30,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2188 states. [2020-09-17 01:54:30,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 2782 transitions. [2020-09-17 01:54:30,293 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 2782 transitions. Word has length 130 [2020-09-17 01:54:30,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:30,294 INFO L479 AbstractCegarLoop]: Abstraction has 2188 states and 2782 transitions. [2020-09-17 01:54:30,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 01:54:30,294 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 2782 transitions. [2020-09-17 01:54:30,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-09-17 01:54:30,299 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:30,299 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:30,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-17 01:54:30,515 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:30,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:30,515 INFO L82 PathProgramCache]: Analyzing trace with hash 495747813, now seen corresponding path program 28 times [2020-09-17 01:54:30,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:30,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176036327] [2020-09-17 01:54:30,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:30,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:30,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-17 01:54:30,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176036327] [2020-09-17 01:54:30,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948560718] [2020-09-17 01:54:30,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:32,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 01:54:32,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:54:32,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 01:54:32,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:32,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-17 01:54:32,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:32,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 01:54:32,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148648080] [2020-09-17 01:54:32,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 01:54:32,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:32,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 01:54:32,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-09-17 01:54:32,089 INFO L87 Difference]: Start difference. First operand 2188 states and 2782 transitions. Second operand 19 states. [2020-09-17 01:54:32,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:32,186 INFO L93 Difference]: Finished difference Result 2363 states and 2988 transitions. [2020-09-17 01:54:32,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 01:54:32,187 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 133 [2020-09-17 01:54:32,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:32,196 INFO L225 Difference]: With dead ends: 2363 [2020-09-17 01:54:32,196 INFO L226 Difference]: Without dead ends: 2363 [2020-09-17 01:54:32,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-09-17 01:54:32,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2020-09-17 01:54:32,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 2317. [2020-09-17 01:54:32,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2317 states. [2020-09-17 01:54:32,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 2938 transitions. [2020-09-17 01:54:32,222 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 2938 transitions. Word has length 133 [2020-09-17 01:54:32,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:32,223 INFO L479 AbstractCegarLoop]: Abstraction has 2317 states and 2938 transitions. [2020-09-17 01:54:32,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 01:54:32,223 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 2938 transitions. [2020-09-17 01:54:32,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-17 01:54:32,228 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:32,229 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:32,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:32,442 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:32,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:32,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1752391423, now seen corresponding path program 29 times [2020-09-17 01:54:32,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:32,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608350201] [2020-09-17 01:54:32,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:32,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:32,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-17 01:54:32,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608350201] [2020-09-17 01:54:32,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818209187] [2020-09-17 01:54:32,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:33,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-09-17 01:54:33,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:54:33,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 01:54:33,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:33,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-17 01:54:33,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:33,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 01:54:33,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889865150] [2020-09-17 01:54:33,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 01:54:33,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:33,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 01:54:33,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-17 01:54:33,233 INFO L87 Difference]: Start difference. First operand 2317 states and 2938 transitions. Second operand 20 states. [2020-09-17 01:54:33,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:33,349 INFO L93 Difference]: Finished difference Result 2492 states and 3144 transitions. [2020-09-17 01:54:33,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 01:54:33,349 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 136 [2020-09-17 01:54:33,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:33,353 INFO L225 Difference]: With dead ends: 2492 [2020-09-17 01:54:33,354 INFO L226 Difference]: Without dead ends: 2492 [2020-09-17 01:54:33,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-17 01:54:33,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2020-09-17 01:54:33,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 2446. [2020-09-17 01:54:33,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2446 states. [2020-09-17 01:54:33,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2446 states to 2446 states and 3094 transitions. [2020-09-17 01:54:33,378 INFO L78 Accepts]: Start accepts. Automaton has 2446 states and 3094 transitions. Word has length 136 [2020-09-17 01:54:33,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:33,378 INFO L479 AbstractCegarLoop]: Abstraction has 2446 states and 3094 transitions. [2020-09-17 01:54:33,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 01:54:33,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2446 states and 3094 transitions. [2020-09-17 01:54:33,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-17 01:54:33,383 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:33,383 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:33,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:33,597 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:33,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:33,597 INFO L82 PathProgramCache]: Analyzing trace with hash -807742299, now seen corresponding path program 30 times [2020-09-17 01:54:33,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:33,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455877627] [2020-09-17 01:54:33,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:33,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:34,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-17 01:54:34,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455877627] [2020-09-17 01:54:34,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825406829] [2020-09-17 01:54:34,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:34,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-09-17 01:54:34,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:54:34,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 01:54:34,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:34,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-17 01:54:34,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:34,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 01:54:34,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738035908] [2020-09-17 01:54:34,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 01:54:34,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:34,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 01:54:34,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-09-17 01:54:34,831 INFO L87 Difference]: Start difference. First operand 2446 states and 3094 transitions. Second operand 21 states. [2020-09-17 01:54:34,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:34,925 INFO L93 Difference]: Finished difference Result 2621 states and 3300 transitions. [2020-09-17 01:54:34,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 01:54:34,926 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 139 [2020-09-17 01:54:34,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:34,929 INFO L225 Difference]: With dead ends: 2621 [2020-09-17 01:54:34,929 INFO L226 Difference]: Without dead ends: 2621 [2020-09-17 01:54:34,929 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 [2020-09-17 01:54:34,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2621 states. [2020-09-17 01:54:34,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2621 to 2575. [2020-09-17 01:54:34,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2575 states. [2020-09-17 01:54:34,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 3250 transitions. [2020-09-17 01:54:34,957 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 3250 transitions. Word has length 139 [2020-09-17 01:54:34,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:34,958 INFO L479 AbstractCegarLoop]: Abstraction has 2575 states and 3250 transitions. [2020-09-17 01:54:34,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 01:54:34,958 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 3250 transitions. [2020-09-17 01:54:34,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-09-17 01:54:34,962 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:34,963 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:35,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-17 01:54:35,178 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:35,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:35,178 INFO L82 PathProgramCache]: Analyzing trace with hash 277787967, now seen corresponding path program 31 times [2020-09-17 01:54:35,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:35,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125952602] [2020-09-17 01:54:35,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-17 01:54:35,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125952602] [2020-09-17 01:54:35,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275446396] [2020-09-17 01:54:35,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:35,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:35,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 01:54:35,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:35,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-17 01:54:35,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:35,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 01:54:35,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658030159] [2020-09-17 01:54:35,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 01:54:35,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:35,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 01:54:35,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-09-17 01:54:35,893 INFO L87 Difference]: Start difference. First operand 2575 states and 3250 transitions. Second operand 22 states. [2020-09-17 01:54:36,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:36,019 INFO L93 Difference]: Finished difference Result 2750 states and 3456 transitions. [2020-09-17 01:54:36,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 01:54:36,020 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 142 [2020-09-17 01:54:36,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:36,025 INFO L225 Difference]: With dead ends: 2750 [2020-09-17 01:54:36,025 INFO L226 Difference]: Without dead ends: 2750 [2020-09-17 01:54:36,027 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 [2020-09-17 01:54:36,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2020-09-17 01:54:36,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 2704. [2020-09-17 01:54:36,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2704 states. [2020-09-17 01:54:36,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2704 states to 2704 states and 3406 transitions. [2020-09-17 01:54:36,056 INFO L78 Accepts]: Start accepts. Automaton has 2704 states and 3406 transitions. Word has length 142 [2020-09-17 01:54:36,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:36,056 INFO L479 AbstractCegarLoop]: Abstraction has 2704 states and 3406 transitions. [2020-09-17 01:54:36,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 01:54:36,056 INFO L276 IsEmpty]: Start isEmpty. Operand 2704 states and 3406 transitions. [2020-09-17 01:54:36,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-09-17 01:54:36,061 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:36,061 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:36,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:36,277 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:36,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:36,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1793796507, now seen corresponding path program 32 times [2020-09-17 01:54:36,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:36,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889581847] [2020-09-17 01:54:36,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:36,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:36,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-17 01:54:36,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889581847] [2020-09-17 01:54:36,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861908511] [2020-09-17 01:54:36,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 01:54:36,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 01:54:36,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:54:36,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 01:54:36,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:36,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-17 01:54:36,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:36,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 01:54:36,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465343894] [2020-09-17 01:54:36,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 01:54:36,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:36,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 01:54:36,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-17 01:54:36,992 INFO L87 Difference]: Start difference. First operand 2704 states and 3406 transitions. Second operand 23 states. [2020-09-17 01:54:37,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:54:37,113 INFO L93 Difference]: Finished difference Result 2833 states and 3562 transitions. [2020-09-17 01:54:37,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 01:54:37,114 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 145 [2020-09-17 01:54:37,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:54:37,118 INFO L225 Difference]: With dead ends: 2833 [2020-09-17 01:54:37,118 INFO L226 Difference]: Without dead ends: 2833 [2020-09-17 01:54:37,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-17 01:54:37,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2020-09-17 01:54:37,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 2833. [2020-09-17 01:54:37,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2833 states. [2020-09-17 01:54:37,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2833 states to 2833 states and 3562 transitions. [2020-09-17 01:54:37,147 INFO L78 Accepts]: Start accepts. Automaton has 2833 states and 3562 transitions. Word has length 145 [2020-09-17 01:54:37,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:54:37,147 INFO L479 AbstractCegarLoop]: Abstraction has 2833 states and 3562 transitions. [2020-09-17 01:54:37,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 01:54:37,147 INFO L276 IsEmpty]: Start isEmpty. Operand 2833 states and 3562 transitions. [2020-09-17 01:54:37,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-17 01:54:37,152 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:54:37,152 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:54:37,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-17 01:54:37,366 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:54:37,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:54:37,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1981785217, now seen corresponding path program 33 times [2020-09-17 01:54:37,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:54:37,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091492217] [2020-09-17 01:54:37,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:54:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:54:40,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 01:54:40,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091492217] [2020-09-17 01:54:40,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874201885] [2020-09-17 01:54:40,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 01:54:41,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-09-17 01:54:41,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:54:41,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-17 01:54:41,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:54:41,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 01:54:41,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:54:41,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-17 01:54:41,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940268042] [2020-09-17 01:54:41,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-17 01:54:41,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:54:41,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-17 01:54:41,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 01:54:41,785 INFO L87 Difference]: Start difference. First operand 2833 states and 3562 transitions. Second operand 63 states. [2020-09-17 01:56:15,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:56:15,199 INFO L93 Difference]: Finished difference Result 32926 states and 45933 transitions. [2020-09-17 01:56:15,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 633 states. [2020-09-17 01:56:15,200 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-17 01:56:15,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:56:15,256 INFO L225 Difference]: With dead ends: 32926 [2020-09-17 01:56:15,257 INFO L226 Difference]: Without dead ends: 32924 [2020-09-17 01:56:15,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 632 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162735 ImplicationChecksByTransitivity, 36.6s TimeCoverageRelationStatistics Valid=2407, Invalid=398915, Unknown=0, NotChecked=0, Total=401322 [2020-09-17 01:56:15,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32924 states. [2020-09-17 01:56:15,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32924 to 2967. [2020-09-17 01:56:15,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2967 states. [2020-09-17 01:56:15,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2967 states to 2967 states and 3794 transitions. [2020-09-17 01:56:15,461 INFO L78 Accepts]: Start accepts. Automaton has 2967 states and 3794 transitions. Word has length 148 [2020-09-17 01:56:15,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:56:15,461 INFO L479 AbstractCegarLoop]: Abstraction has 2967 states and 3794 transitions. [2020-09-17 01:56:15,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-17 01:56:15,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2967 states and 3794 transitions. [2020-09-17 01:56:15,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-17 01:56:15,466 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:56:15,466 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:56:15,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-09-17 01:56:15,679 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:56:15,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:56:15,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1970430061, now seen corresponding path program 34 times [2020-09-17 01:56:15,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:56:15,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909002913] [2020-09-17 01:56:15,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:56:15,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:56:19,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 01:56:19,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909002913] [2020-09-17 01:56:19,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136308909] [2020-09-17 01:56:19,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 01:56:21,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 01:56:21,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:56:21,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-17 01:56:21,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:56:21,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 01:56:21,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:56:21,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-17 01:56:21,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277262717] [2020-09-17 01:56:21,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-17 01:56:21,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:56:21,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-17 01:56:21,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 01:56:21,399 INFO L87 Difference]: Start difference. First operand 2967 states and 3794 transitions. Second operand 63 states. [2020-09-17 01:57:57,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:57:57,235 INFO L93 Difference]: Finished difference Result 30945 states and 43173 transitions. [2020-09-17 01:57:57,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-09-17 01:57:57,236 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-17 01:57:57,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:57:57,281 INFO L225 Difference]: With dead ends: 30945 [2020-09-17 01:57:57,281 INFO L226 Difference]: Without dead ends: 30943 [2020-09-17 01:57:57,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 37.4s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-09-17 01:57:57,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30943 states. [2020-09-17 01:57:58,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30943 to 2973. [2020-09-17 01:57:58,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2973 states. [2020-09-17 01:57:58,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 3801 transitions. [2020-09-17 01:57:58,342 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 3801 transitions. Word has length 148 [2020-09-17 01:57:58,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:57:58,343 INFO L479 AbstractCegarLoop]: Abstraction has 2973 states and 3801 transitions. [2020-09-17 01:57:58,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-17 01:57:58,343 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 3801 transitions. [2020-09-17 01:57:58,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-17 01:57:58,348 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:57:58,348 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:57:58,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-17 01:57:58,562 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:57:58,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:57:58,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1092472257, now seen corresponding path program 35 times [2020-09-17 01:57:58,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:57:58,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554135892] [2020-09-17 01:57:58,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:57:58,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:58:02,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 01:58:02,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554135892] [2020-09-17 01:58:02,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121306274] [2020-09-17 01:58:02,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 01:58:02,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-09-17 01:58:02,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:58:02,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-17 01:58:02,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:58:02,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 01:58:02,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:58:02,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-17 01:58:02,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742362691] [2020-09-17 01:58:02,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-17 01:58:02,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:58:02,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-17 01:58:02,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 01:58:02,791 INFO L87 Difference]: Start difference. First operand 2973 states and 3801 transitions. Second operand 63 states. [2020-09-17 01:59:42,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 01:59:42,328 INFO L93 Difference]: Finished difference Result 30939 states and 43164 transitions. [2020-09-17 01:59:42,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-09-17 01:59:42,329 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-17 01:59:42,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 01:59:42,372 INFO L225 Difference]: With dead ends: 30939 [2020-09-17 01:59:42,372 INFO L226 Difference]: Without dead ends: 30937 [2020-09-17 01:59:42,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 38.8s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-09-17 01:59:42,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30937 states. [2020-09-17 01:59:42,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30937 to 2979. [2020-09-17 01:59:42,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2979 states. [2020-09-17 01:59:42,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2979 states to 2979 states and 3808 transitions. [2020-09-17 01:59:42,560 INFO L78 Accepts]: Start accepts. Automaton has 2979 states and 3808 transitions. Word has length 148 [2020-09-17 01:59:42,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 01:59:42,560 INFO L479 AbstractCegarLoop]: Abstraction has 2979 states and 3808 transitions. [2020-09-17 01:59:42,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-17 01:59:42,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2979 states and 3808 transitions. [2020-09-17 01:59:42,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-17 01:59:42,566 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 01:59:42,566 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 01:59:42,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-17 01:59:42,779 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 01:59:42,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 01:59:42,780 INFO L82 PathProgramCache]: Analyzing trace with hash 769524141, now seen corresponding path program 36 times [2020-09-17 01:59:42,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 01:59:42,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523345807] [2020-09-17 01:59:42,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 01:59:42,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 01:59:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 01:59:46,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523345807] [2020-09-17 01:59:46,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095437898] [2020-09-17 01:59:46,753 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 01:59:47,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-09-17 01:59:47,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 01:59:47,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-17 01:59:47,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 01:59:47,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 01:59:47,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 01:59:47,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-17 01:59:47,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213283419] [2020-09-17 01:59:47,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-17 01:59:47,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 01:59:47,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-17 01:59:47,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 01:59:47,586 INFO L87 Difference]: Start difference. First operand 2979 states and 3808 transitions. Second operand 63 states. [2020-09-17 02:01:29,179 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-09-17 02:01:32,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:01:32,614 INFO L93 Difference]: Finished difference Result 30933 states and 43155 transitions. [2020-09-17 02:01:32,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-09-17 02:01:32,615 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-17 02:01:32,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:01:32,650 INFO L225 Difference]: With dead ends: 30933 [2020-09-17 02:01:32,650 INFO L226 Difference]: Without dead ends: 30931 [2020-09-17 02:01:32,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 41.6s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-09-17 02:01:32,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30931 states. [2020-09-17 02:01:32,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30931 to 2985. [2020-09-17 02:01:32,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2985 states. [2020-09-17 02:01:32,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2985 states to 2985 states and 3815 transitions. [2020-09-17 02:01:32,849 INFO L78 Accepts]: Start accepts. Automaton has 2985 states and 3815 transitions. Word has length 148 [2020-09-17 02:01:32,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:01:32,850 INFO L479 AbstractCegarLoop]: Abstraction has 2985 states and 3815 transitions. [2020-09-17 02:01:32,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-17 02:01:32,850 INFO L276 IsEmpty]: Start isEmpty. Operand 2985 states and 3815 transitions. [2020-09-17 02:01:32,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-17 02:01:32,855 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:01:32,856 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:01:33,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-17 02:01:33,072 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:01:33,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:01:33,072 INFO L82 PathProgramCache]: Analyzing trace with hash -188999425, now seen corresponding path program 37 times [2020-09-17 02:01:33,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:01:33,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85767729] [2020-09-17 02:01:33,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:01:33,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:01:37,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:01:37,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85767729] [2020-09-17 02:01:37,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465058728] [2020-09-17 02:01:37,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:01:37,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:01:37,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-17 02:01:37,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:01:37,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:01:37,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:01:37,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-17 02:01:37,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676074061] [2020-09-17 02:01:37,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-17 02:01:37,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:01:37,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-17 02:01:37,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 02:01:37,733 INFO L87 Difference]: Start difference. First operand 2985 states and 3815 transitions. Second operand 63 states. [2020-09-17 02:03:32,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:03:32,752 INFO L93 Difference]: Finished difference Result 30927 states and 43146 transitions. [2020-09-17 02:03:32,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-09-17 02:03:32,753 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-17 02:03:32,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:03:32,787 INFO L225 Difference]: With dead ends: 30927 [2020-09-17 02:03:32,787 INFO L226 Difference]: Without dead ends: 30925 [2020-09-17 02:03:32,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 44.1s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-09-17 02:03:32,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30925 states. [2020-09-17 02:03:33,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30925 to 2991. [2020-09-17 02:03:33,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2991 states. [2020-09-17 02:03:33,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 3822 transitions. [2020-09-17 02:03:33,107 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 3822 transitions. Word has length 148 [2020-09-17 02:03:33,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:03:33,107 INFO L479 AbstractCegarLoop]: Abstraction has 2991 states and 3822 transitions. [2020-09-17 02:03:33,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-17 02:03:33,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 3822 transitions. [2020-09-17 02:03:33,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-17 02:03:33,112 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:03:33,112 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:03:33,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-17 02:03:33,327 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:03:33,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:03:33,327 INFO L82 PathProgramCache]: Analyzing trace with hash 48993005, now seen corresponding path program 38 times [2020-09-17 02:03:33,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:03:33,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366468553] [2020-09-17 02:03:33,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:03:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:03:37,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:03:37,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366468553] [2020-09-17 02:03:37,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583466849] [2020-09-17 02:03:37,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:03:38,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:03:38,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:03:38,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-17 02:03:38,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:03:38,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:03:38,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:03:38,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-17 02:03:38,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740456524] [2020-09-17 02:03:38,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-17 02:03:38,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:03:38,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-17 02:03:38,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 02:03:38,259 INFO L87 Difference]: Start difference. First operand 2991 states and 3822 transitions. Second operand 63 states. [2020-09-17 02:05:46,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:05:46,231 INFO L93 Difference]: Finished difference Result 30921 states and 43137 transitions. [2020-09-17 02:05:46,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-09-17 02:05:46,233 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-17 02:05:46,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:05:46,265 INFO L225 Difference]: With dead ends: 30921 [2020-09-17 02:05:46,266 INFO L226 Difference]: Without dead ends: 30919 [2020-09-17 02:05:46,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 48.1s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-09-17 02:05:46,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30919 states. [2020-09-17 02:05:46,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30919 to 2997. [2020-09-17 02:05:46,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2997 states. [2020-09-17 02:05:46,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2997 states to 2997 states and 3829 transitions. [2020-09-17 02:05:46,552 INFO L78 Accepts]: Start accepts. Automaton has 2997 states and 3829 transitions. Word has length 148 [2020-09-17 02:05:46,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:05:46,553 INFO L479 AbstractCegarLoop]: Abstraction has 2997 states and 3829 transitions. [2020-09-17 02:05:46,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-17 02:05:46,553 INFO L276 IsEmpty]: Start isEmpty. Operand 2997 states and 3829 transitions. [2020-09-17 02:05:46,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-17 02:05:46,558 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:05:46,558 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:05:46,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-17 02:05:46,773 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:05:46,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:05:46,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1924796351, now seen corresponding path program 39 times [2020-09-17 02:05:46,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:05:46,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70434379] [2020-09-17 02:05:46,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:05:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:05:51,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:05:51,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70434379] [2020-09-17 02:05:51,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772657551] [2020-09-17 02:05:51,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:05:52,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-09-17 02:05:52,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:05:52,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-17 02:05:52,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:05:53,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:05:53,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:05:53,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-17 02:05:53,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272460121] [2020-09-17 02:05:53,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-17 02:05:53,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:05:53,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-17 02:05:53,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 02:05:53,068 INFO L87 Difference]: Start difference. First operand 2997 states and 3829 transitions. Second operand 63 states.