/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-bf4350c [2020-09-17 14:23:07,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-17 14:23:07,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-17 14:23:07,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-17 14:23:07,527 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-17 14:23:07,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-17 14:23:07,529 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-17 14:23:07,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-17 14:23:07,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-17 14:23:07,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-17 14:23:07,536 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-17 14:23:07,537 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-17 14:23:07,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-17 14:23:07,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-17 14:23:07,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-17 14:23:07,541 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-17 14:23:07,542 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-17 14:23:07,543 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-17 14:23:07,545 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-17 14:23:07,547 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-17 14:23:07,549 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-17 14:23:07,550 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-17 14:23:07,552 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-17 14:23:07,553 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-17 14:23:07,556 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-17 14:23:07,557 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-17 14:23:07,557 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-17 14:23:07,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-17 14:23:07,559 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-17 14:23:07,560 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-17 14:23:07,560 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-17 14:23:07,561 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-17 14:23:07,562 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-17 14:23:07,563 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-17 14:23:07,565 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-17 14:23:07,565 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-17 14:23:07,566 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-17 14:23:07,566 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-17 14:23:07,566 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-17 14:23:07,569 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-17 14:23:07,570 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-17 14:23:07,571 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-09-17 14:23:07,620 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-17 14:23:07,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-17 14:23:07,623 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-17 14:23:07,624 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-17 14:23:07,624 INFO L138 SettingsManager]: * Use SBE=true [2020-09-17 14:23:07,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-17 14:23:07,624 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-17 14:23:07,625 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-17 14:23:07,625 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-17 14:23:07,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-17 14:23:07,626 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-17 14:23:07,626 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-17 14:23:07,626 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-17 14:23:07,627 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-17 14:23:07,627 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-17 14:23:07,627 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-17 14:23:07,627 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-17 14:23:07,628 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-17 14:23:07,628 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-17 14:23:07,628 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-17 14:23:07,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-17 14:23:07,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-17 14:23:07,629 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-17 14:23:07,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-17 14:23:07,629 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-17 14:23:07,630 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-17 14:23:07,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-17 14:23:07,630 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-17 14:23:07,630 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-17 14:23:08,085 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-17 14:23:08,104 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-17 14:23:08,108 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-17 14:23:08,110 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-17 14:23:08,111 INFO L275 PluginConnector]: CDTParser initialized [2020-09-17 14:23:08,112 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-09-17 14:23:08,209 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/178c2a772/dbbbf1edd29347b38412615d9973d0e0/FLAGe9795032f [2020-09-17 14:23:08,935 INFO L306 CDTParser]: Found 1 translation units. [2020-09-17 14:23:08,936 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-09-17 14:23:08,957 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/178c2a772/dbbbf1edd29347b38412615d9973d0e0/FLAGe9795032f [2020-09-17 14:23:09,098 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/178c2a772/dbbbf1edd29347b38412615d9973d0e0 [2020-09-17 14:23:09,110 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-17 14:23:09,117 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-17 14:23:09,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-17 14:23:09,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-17 14:23:09,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-17 14:23:09,124 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 02:23:09" (1/1) ... [2020-09-17 14:23:09,127 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52697317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:23:09, skipping insertion in model container [2020-09-17 14:23:09,128 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 02:23:09" (1/1) ... [2020-09-17 14:23:09,137 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-17 14:23:09,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-17 14:23:09,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-17 14:23:09,931 INFO L203 MainTranslator]: Completed pre-run [2020-09-17 14:23:09,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-17 14:23:10,212 INFO L208 MainTranslator]: Completed translation [2020-09-17 14:23:10,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:23:10 WrapperNode [2020-09-17 14:23:10,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-17 14:23:10,214 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-17 14:23:10,214 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-17 14:23:10,214 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-17 14:23:10,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:23:10" (1/1) ... [2020-09-17 14:23:10,254 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:23:10" (1/1) ... [2020-09-17 14:23:10,285 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-17 14:23:10,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-17 14:23:10,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-17 14:23:10,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-17 14:23:10,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:23:10" (1/1) ... [2020-09-17 14:23:10,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:23:10" (1/1) ... [2020-09-17 14:23:10,303 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:23:10" (1/1) ... [2020-09-17 14:23:10,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:23:10" (1/1) ... [2020-09-17 14:23:10,311 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:23:10" (1/1) ... [2020-09-17 14:23:10,318 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:23:10" (1/1) ... [2020-09-17 14:23:10,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:23:10" (1/1) ... [2020-09-17 14:23:10,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-17 14:23:10,328 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-17 14:23:10,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-17 14:23:10,329 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-17 14:23:10,332 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:23:10" (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 14:23:10,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-17 14:23:10,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-17 14:23:10,419 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-17 14:23:10,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-17 14:23:10,419 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-09-17 14:23:10,419 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2020-09-17 14:23:10,419 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2020-09-17 14:23:10,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-17 14:23:10,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-17 14:23:10,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-17 14:23:10,423 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 14:23:10,897 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-17 14:23:10,897 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-09-17 14:23:10,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 02:23:10 BoogieIcfgContainer [2020-09-17 14:23:10,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-17 14:23:10,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-17 14:23:10,904 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-17 14:23:10,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-17 14:23:10,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 02:23:09" (1/3) ... [2020-09-17 14:23:10,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24763c0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 02:23:10, skipping insertion in model container [2020-09-17 14:23:10,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:23:10" (2/3) ... [2020-09-17 14:23:10,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24763c0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 02:23:10, skipping insertion in model container [2020-09-17 14:23:10,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 02:23:10" (3/3) ... [2020-09-17 14:23:10,912 INFO L109 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2020-09-17 14:23:10,925 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-17 14:23:10,925 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-17 14:23:10,936 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-17 14:23:10,937 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-17 14:23:10,965 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:10,966 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:10,966 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:10,966 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:10,966 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:10,967 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:10,967 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:10,967 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:10,967 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:10,968 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:10,968 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:10,968 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:10,968 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:10,969 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:10,969 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:10,969 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:10,970 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:10,970 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:10,970 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:10,970 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:10,971 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:10,971 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:10,971 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:10,976 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:10,977 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:10,977 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:10,977 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:10,977 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:10,977 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:10,978 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:10,978 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:10,978 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:11,005 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-17 14:23:11,030 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-17 14:23:11,030 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-17 14:23:11,031 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-17 14:23:11,031 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-17 14:23:11,031 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-17 14:23:11,031 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-17 14:23:11,031 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-17 14:23:11,031 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-17 14:23:11,049 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 81 transitions, 170 flow [2020-09-17 14:23:11,051 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 170 flow [2020-09-17 14:23:11,107 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2020-09-17 14:23:11,107 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-17 14:23:11,113 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 14:23:11,118 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 170 flow [2020-09-17 14:23:11,142 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2020-09-17 14:23:11,143 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-17 14:23:11,144 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 14:23:11,146 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 646 [2020-09-17 14:23:11,147 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-17 14:23:12,988 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-09-17 14:23:13,162 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-09-17 14:23:13,884 WARN L193 SmtUtils]: Spent 716.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 110 [2020-09-17 14:23:14,183 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-09-17 14:23:14,193 INFO L206 etLargeBlockEncoding]: Checked pairs total: 738 [2020-09-17 14:23:14,194 INFO L214 etLargeBlockEncoding]: Total number of compositions: 70 [2020-09-17 14:23:14,199 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 19 places, 17 transitions, 42 flow [2020-09-17 14:23:14,210 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2020-09-17 14:23:14,212 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-09-17 14:23:14,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-17 14:23:14,221 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:14,222 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:14,222 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:14,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:14,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1717538151, now seen corresponding path program 1 times [2020-09-17 14:23:14,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:14,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445365402] [2020-09-17 14:23:14,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:14,501 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 14:23:14,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445365402] [2020-09-17 14:23:14,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 14:23:14,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-17 14:23:14,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875958297] [2020-09-17 14:23:14,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-17 14:23:14,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:14,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-17 14:23:14,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-17 14:23:14,531 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-09-17 14:23:14,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:14,572 INFO L93 Difference]: Finished difference Result 52 states and 100 transitions. [2020-09-17 14:23:14,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-17 14:23:14,575 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-09-17 14:23:14,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:14,590 INFO L225 Difference]: With dead ends: 52 [2020-09-17 14:23:14,591 INFO L226 Difference]: Without dead ends: 52 [2020-09-17 14:23:14,592 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 14:23:14,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-17 14:23:14,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-09-17 14:23:14,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-17 14:23:14,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2020-09-17 14:23:14,635 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 8 [2020-09-17 14:23:14,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:14,635 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2020-09-17 14:23:14,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-17 14:23:14,635 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2020-09-17 14:23:14,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 14:23:14,636 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:14,637 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:14,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-17 14:23:14,637 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:14,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:14,638 INFO L82 PathProgramCache]: Analyzing trace with hash 62706239, now seen corresponding path program 1 times [2020-09-17 14:23:14,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:14,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499350350] [2020-09-17 14:23:14,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:14,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:14,756 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 14:23:14,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499350350] [2020-09-17 14:23:14,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 14:23:14,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-17 14:23:14,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470900069] [2020-09-17 14:23:14,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-17 14:23:14,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:14,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-17 14:23:14,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-17 14:23:14,760 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand 3 states. [2020-09-17 14:23:14,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:14,779 INFO L93 Difference]: Finished difference Result 64 states and 124 transitions. [2020-09-17 14:23:14,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-17 14:23:14,780 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-09-17 14:23:14,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:14,781 INFO L225 Difference]: With dead ends: 64 [2020-09-17 14:23:14,781 INFO L226 Difference]: Without dead ends: 64 [2020-09-17 14:23:14,782 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 14:23:14,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-17 14:23:14,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2020-09-17 14:23:14,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 14:23:14,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 88 transitions. [2020-09-17 14:23:14,791 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 88 transitions. Word has length 11 [2020-09-17 14:23:14,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:14,791 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 88 transitions. [2020-09-17 14:23:14,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-17 14:23:14,791 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 88 transitions. [2020-09-17 14:23:14,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 14:23:14,792 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:14,793 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:14,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-17 14:23:14,793 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:14,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:14,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1954756591, now seen corresponding path program 1 times [2020-09-17 14:23:14,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:14,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003101953] [2020-09-17 14:23:14,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:14,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:14,881 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 14:23:14,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003101953] [2020-09-17 14:23:14,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 14:23:14,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-17 14:23:14,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377763303] [2020-09-17 14:23:14,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-17 14:23:14,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:14,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-17 14:23:14,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-17 14:23:14,883 INFO L87 Difference]: Start difference. First operand 46 states and 88 transitions. Second operand 3 states. [2020-09-17 14:23:14,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:14,936 INFO L93 Difference]: Finished difference Result 40 states and 66 transitions. [2020-09-17 14:23:14,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-17 14:23:14,939 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-09-17 14:23:14,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:14,940 INFO L225 Difference]: With dead ends: 40 [2020-09-17 14:23:14,940 INFO L226 Difference]: Without dead ends: 40 [2020-09-17 14:23:14,941 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 14:23:14,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-17 14:23:14,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-09-17 14:23:14,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-17 14:23:14,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 66 transitions. [2020-09-17 14:23:14,952 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 66 transitions. Word has length 15 [2020-09-17 14:23:14,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:14,953 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 66 transitions. [2020-09-17 14:23:14,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-17 14:23:14,954 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 66 transitions. [2020-09-17 14:23:14,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 14:23:14,955 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:14,957 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:14,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-17 14:23:14,958 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:14,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:14,958 INFO L82 PathProgramCache]: Analyzing trace with hash 525517821, now seen corresponding path program 2 times [2020-09-17 14:23:14,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:14,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204399675] [2020-09-17 14:23:14,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:15,090 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 14:23:15,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204399675] [2020-09-17 14:23:15,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758735202] [2020-09-17 14:23:15,091 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 14:23:15,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:23:15,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:15,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2020-09-17 14:23:15,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:15,237 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 14:23:15,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:15,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-09-17 14:23:15,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567863150] [2020-09-17 14:23:15,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-17 14:23:15,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:15,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-17 14:23:15,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-17 14:23:15,239 INFO L87 Difference]: Start difference. First operand 40 states and 66 transitions. Second operand 6 states. [2020-09-17 14:23:15,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:15,395 INFO L93 Difference]: Finished difference Result 104 states and 159 transitions. [2020-09-17 14:23:15,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 14:23:15,398 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-09-17 14:23:15,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:15,402 INFO L225 Difference]: With dead ends: 104 [2020-09-17 14:23:15,403 INFO L226 Difference]: Without dead ends: 104 [2020-09-17 14:23:15,403 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 14:23:15,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-17 14:23:15,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 79. [2020-09-17 14:23:15,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-17 14:23:15,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 124 transitions. [2020-09-17 14:23:15,425 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 124 transitions. Word has length 15 [2020-09-17 14:23:15,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:15,425 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 124 transitions. [2020-09-17 14:23:15,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-17 14:23:15,426 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 124 transitions. [2020-09-17 14:23:15,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 14:23:15,428 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:15,428 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:15,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:15,630 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:15,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:15,630 INFO L82 PathProgramCache]: Analyzing trace with hash 485096059, now seen corresponding path program 3 times [2020-09-17 14:23:15,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:15,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088615769] [2020-09-17 14:23:15,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:15,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:15,768 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 14:23:15,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088615769] [2020-09-17 14:23:15,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973719212] [2020-09-17 14:23:15,769 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 14:23:15,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 14:23:15,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:15,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-17 14:23:15,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:15,885 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 14:23:15,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:15,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-09-17 14:23:15,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053273854] [2020-09-17 14:23:15,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 14:23:15,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:15,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 14:23:15,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-17 14:23:15,888 INFO L87 Difference]: Start difference. First operand 79 states and 124 transitions. Second operand 8 states. [2020-09-17 14:23:16,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:16,169 INFO L93 Difference]: Finished difference Result 160 states and 236 transitions. [2020-09-17 14:23:16,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 14:23:16,169 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-09-17 14:23:16,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:16,171 INFO L225 Difference]: With dead ends: 160 [2020-09-17 14:23:16,171 INFO L226 Difference]: Without dead ends: 160 [2020-09-17 14:23:16,172 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 14:23:16,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-17 14:23:16,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 130. [2020-09-17 14:23:16,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-17 14:23:16,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 196 transitions. [2020-09-17 14:23:16,186 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 196 transitions. Word has length 22 [2020-09-17 14:23:16,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:16,186 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 196 transitions. [2020-09-17 14:23:16,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 14:23:16,187 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 196 transitions. [2020-09-17 14:23:16,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 14:23:16,188 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:16,188 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:16,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:16,403 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:16,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:16,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1548321815, now seen corresponding path program 4 times [2020-09-17 14:23:16,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:16,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713965523] [2020-09-17 14:23:16,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:16,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:16,509 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 14:23:16,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713965523] [2020-09-17 14:23:16,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818388554] [2020-09-17 14:23:16,510 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 14:23:16,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:23:16,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:16,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2020-09-17 14:23:16,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:16,637 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 14:23:16,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:16,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-17 14:23:16,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222347849] [2020-09-17 14:23:16,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-17 14:23:16,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:16,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-17 14:23:16,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-09-17 14:23:16,640 INFO L87 Difference]: Start difference. First operand 130 states and 196 transitions. Second operand 7 states. [2020-09-17 14:23:16,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:16,668 INFO L93 Difference]: Finished difference Result 178 states and 262 transitions. [2020-09-17 14:23:16,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-17 14:23:16,668 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-09-17 14:23:16,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:16,670 INFO L225 Difference]: With dead ends: 178 [2020-09-17 14:23:16,670 INFO L226 Difference]: Without dead ends: 178 [2020-09-17 14:23:16,670 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 14:23:16,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-09-17 14:23:16,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 160. [2020-09-17 14:23:16,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-17 14:23:16,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 238 transitions. [2020-09-17 14:23:16,683 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 238 transitions. Word has length 29 [2020-09-17 14:23:16,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:16,683 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 238 transitions. [2020-09-17 14:23:16,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-17 14:23:16,683 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 238 transitions. [2020-09-17 14:23:16,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 14:23:16,685 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:16,686 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:16,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:16,899 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:16,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:16,900 INFO L82 PathProgramCache]: Analyzing trace with hash -2012714619, now seen corresponding path program 5 times [2020-09-17 14:23:16,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:16,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772565720] [2020-09-17 14:23:16,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:16,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:17,007 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 14:23:17,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772565720] [2020-09-17 14:23:17,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612723831] [2020-09-17 14:23:17,008 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 14:23:17,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-17 14:23:17,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:17,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-17 14:23:17,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:17,110 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 14:23:17,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:17,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-17 14:23:17,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248967982] [2020-09-17 14:23:17,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 14:23:17,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:17,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 14:23:17,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-09-17 14:23:17,113 INFO L87 Difference]: Start difference. First operand 160 states and 238 transitions. Second operand 8 states. [2020-09-17 14:23:17,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:17,153 INFO L93 Difference]: Finished difference Result 208 states and 304 transitions. [2020-09-17 14:23:17,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-17 14:23:17,154 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-09-17 14:23:17,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:17,156 INFO L225 Difference]: With dead ends: 208 [2020-09-17 14:23:17,156 INFO L226 Difference]: Without dead ends: 208 [2020-09-17 14:23:17,157 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 14:23:17,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-17 14:23:17,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 190. [2020-09-17 14:23:17,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-09-17 14:23:17,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 280 transitions. [2020-09-17 14:23:17,169 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 280 transitions. Word has length 33 [2020-09-17 14:23:17,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:17,169 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 280 transitions. [2020-09-17 14:23:17,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 14:23:17,170 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 280 transitions. [2020-09-17 14:23:17,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-17 14:23:17,172 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:17,172 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:17,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:17,386 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:17,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:17,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1171974131, now seen corresponding path program 6 times [2020-09-17 14:23:17,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:17,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300739865] [2020-09-17 14:23:17,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:17,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:17,537 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 14:23:17,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300739865] [2020-09-17 14:23:17,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141596400] [2020-09-17 14:23:17,541 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 14:23:17,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-17 14:23:17,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:17,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2020-09-17 14:23:17,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:17,802 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 14:23:17,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:17,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-09-17 14:23:17,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165894053] [2020-09-17 14:23:17,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 14:23:17,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:17,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 14:23:17,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-09-17 14:23:17,807 INFO L87 Difference]: Start difference. First operand 190 states and 280 transitions. Second operand 12 states. [2020-09-17 14:23:18,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:18,374 INFO L93 Difference]: Finished difference Result 304 states and 429 transitions. [2020-09-17 14:23:18,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 14:23:18,375 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-09-17 14:23:18,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:18,377 INFO L225 Difference]: With dead ends: 304 [2020-09-17 14:23:18,377 INFO L226 Difference]: Without dead ends: 304 [2020-09-17 14:23:18,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=420, Invalid=840, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 14:23:18,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-09-17 14:23:18,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 265. [2020-09-17 14:23:18,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-09-17 14:23:18,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 380 transitions. [2020-09-17 14:23:18,397 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 380 transitions. Word has length 37 [2020-09-17 14:23:18,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:18,398 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 380 transitions. [2020-09-17 14:23:18,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 14:23:18,399 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 380 transitions. [2020-09-17 14:23:18,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-17 14:23:18,405 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:18,405 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:18,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:18,619 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:18,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:18,620 INFO L82 PathProgramCache]: Analyzing trace with hash -870694653, now seen corresponding path program 7 times [2020-09-17 14:23:18,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:18,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618802998] [2020-09-17 14:23:18,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:18,751 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 14:23:18,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618802998] [2020-09-17 14:23:18,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729471115] [2020-09-17 14:23:18,752 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 14:23:18,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:18,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 14:23:18,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:18,881 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 14:23:18,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:18,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-17 14:23:18,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164855840] [2020-09-17 14:23:18,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 14:23:18,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:18,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 14:23:18,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-09-17 14:23:18,884 INFO L87 Difference]: Start difference. First operand 265 states and 380 transitions. Second operand 10 states. [2020-09-17 14:23:18,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:18,932 INFO L93 Difference]: Finished difference Result 322 states and 456 transitions. [2020-09-17 14:23:18,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-17 14:23:18,932 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-09-17 14:23:18,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:18,935 INFO L225 Difference]: With dead ends: 322 [2020-09-17 14:23:18,935 INFO L226 Difference]: Without dead ends: 322 [2020-09-17 14:23:18,935 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 14:23:18,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-09-17 14:23:18,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 301. [2020-09-17 14:23:18,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-09-17 14:23:18,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 429 transitions. [2020-09-17 14:23:18,944 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 429 transitions. Word has length 44 [2020-09-17 14:23:18,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:18,945 INFO L479 AbstractCegarLoop]: Abstraction has 301 states and 429 transitions. [2020-09-17 14:23:18,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 14:23:18,945 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 429 transitions. [2020-09-17 14:23:18,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-17 14:23:18,949 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:18,950 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:19,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:19,164 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:19,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:19,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1422004693, now seen corresponding path program 8 times [2020-09-17 14:23:19,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:19,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247765191] [2020-09-17 14:23:19,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:19,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:19,355 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 14:23:19,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247765191] [2020-09-17 14:23:19,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522527304] [2020-09-17 14:23:19,356 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 14:23:19,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:23:19,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:19,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 14:23:19,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:19,486 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 14:23:19,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:19,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-17 14:23:19,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16334536] [2020-09-17 14:23:19,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 14:23:19,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:19,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 14:23:19,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-17 14:23:19,489 INFO L87 Difference]: Start difference. First operand 301 states and 429 transitions. Second operand 11 states. [2020-09-17 14:23:19,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:19,533 INFO L93 Difference]: Finished difference Result 358 states and 505 transitions. [2020-09-17 14:23:19,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 14:23:19,534 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-09-17 14:23:19,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:19,536 INFO L225 Difference]: With dead ends: 358 [2020-09-17 14:23:19,536 INFO L226 Difference]: Without dead ends: 358 [2020-09-17 14:23:19,537 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 14:23:19,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-09-17 14:23:19,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 337. [2020-09-17 14:23:19,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-09-17 14:23:19,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 478 transitions. [2020-09-17 14:23:19,545 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 478 transitions. Word has length 48 [2020-09-17 14:23:19,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:19,546 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 478 transitions. [2020-09-17 14:23:19,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 14:23:19,546 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 478 transitions. [2020-09-17 14:23:19,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-17 14:23:19,547 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:19,547 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:19,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-17 14:23:19,763 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:19,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:19,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1332663897, now seen corresponding path program 9 times [2020-09-17 14:23:19,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:19,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296327019] [2020-09-17 14:23:19,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:19,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:19,943 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 14:23:19,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296327019] [2020-09-17 14:23:19,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905275554] [2020-09-17 14:23:19,944 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 14:23:20,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-17 14:23:20,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:20,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-17 14:23:20,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:20,121 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 14:23:20,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:20,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2020-09-17 14:23:20,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261388519] [2020-09-17 14:23:20,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 14:23:20,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:20,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 14:23:20,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-09-17 14:23:20,125 INFO L87 Difference]: Start difference. First operand 337 states and 478 transitions. Second operand 16 states. [2020-09-17 14:23:21,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:21,512 INFO L93 Difference]: Finished difference Result 484 states and 664 transitions. [2020-09-17 14:23:21,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-09-17 14:23:21,516 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-09-17 14:23:21,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:21,520 INFO L225 Difference]: With dead ends: 484 [2020-09-17 14:23:21,520 INFO L226 Difference]: Without dead ends: 484 [2020-09-17 14:23:21,522 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 14:23:21,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-09-17 14:23:21,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 436. [2020-09-17 14:23:21,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2020-09-17 14:23:21,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 606 transitions. [2020-09-17 14:23:21,533 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 606 transitions. Word has length 52 [2020-09-17 14:23:21,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:21,534 INFO L479 AbstractCegarLoop]: Abstraction has 436 states and 606 transitions. [2020-09-17 14:23:21,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 14:23:21,534 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 606 transitions. [2020-09-17 14:23:21,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-17 14:23:21,536 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:21,537 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:21,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-09-17 14:23:21,752 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:21,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:21,753 INFO L82 PathProgramCache]: Analyzing trace with hash 298647787, now seen corresponding path program 10 times [2020-09-17 14:23:21,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:21,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843218575] [2020-09-17 14:23:21,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:21,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:21,943 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 14:23:21,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843218575] [2020-09-17 14:23:21,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143726204] [2020-09-17 14:23:21,944 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 14:23:22,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:23:22,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:22,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 14:23:22,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:22,136 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 14:23:22,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:22,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-17 14:23:22,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250353181] [2020-09-17 14:23:22,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 14:23:22,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:22,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 14:23:22,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-09-17 14:23:22,138 INFO L87 Difference]: Start difference. First operand 436 states and 606 transitions. Second operand 13 states. [2020-09-17 14:23:22,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:22,195 INFO L93 Difference]: Finished difference Result 502 states and 692 transitions. [2020-09-17 14:23:22,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 14:23:22,195 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 59 [2020-09-17 14:23:22,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:22,199 INFO L225 Difference]: With dead ends: 502 [2020-09-17 14:23:22,199 INFO L226 Difference]: Without dead ends: 502 [2020-09-17 14:23:22,200 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 14:23:22,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-09-17 14:23:22,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 478. [2020-09-17 14:23:22,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 478 states. [2020-09-17 14:23:22,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 662 transitions. [2020-09-17 14:23:22,211 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 662 transitions. Word has length 59 [2020-09-17 14:23:22,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:22,212 INFO L479 AbstractCegarLoop]: Abstraction has 478 states and 662 transitions. [2020-09-17 14:23:22,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 14:23:22,212 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 662 transitions. [2020-09-17 14:23:22,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-17 14:23:22,213 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:22,214 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:22,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:22,428 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:22,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:22,429 INFO L82 PathProgramCache]: Analyzing trace with hash -734842407, now seen corresponding path program 11 times [2020-09-17 14:23:22,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:22,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766498739] [2020-09-17 14:23:22,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:22,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:22,620 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 14:23:22,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766498739] [2020-09-17 14:23:22,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350392613] [2020-09-17 14:23:22,621 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 14:23:22,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-17 14:23:22,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:22,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 14:23:22,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:22,787 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 14:23:22,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:22,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-17 14:23:22,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405609263] [2020-09-17 14:23:22,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 14:23:22,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:22,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 14:23:22,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-09-17 14:23:22,789 INFO L87 Difference]: Start difference. First operand 478 states and 662 transitions. Second operand 14 states. [2020-09-17 14:23:22,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:22,867 INFO L93 Difference]: Finished difference Result 544 states and 748 transitions. [2020-09-17 14:23:22,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 14:23:22,868 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-09-17 14:23:22,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:22,871 INFO L225 Difference]: With dead ends: 544 [2020-09-17 14:23:22,871 INFO L226 Difference]: Without dead ends: 544 [2020-09-17 14:23:22,872 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 14:23:22,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2020-09-17 14:23:22,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 520. [2020-09-17 14:23:22,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-09-17 14:23:22,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 718 transitions. [2020-09-17 14:23:22,883 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 718 transitions. Word has length 63 [2020-09-17 14:23:22,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:22,883 INFO L479 AbstractCegarLoop]: Abstraction has 520 states and 718 transitions. [2020-09-17 14:23:22,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 14:23:22,884 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 718 transitions. [2020-09-17 14:23:22,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-17 14:23:22,885 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:22,885 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:23,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:23,100 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:23,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:23,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1524941881, now seen corresponding path program 12 times [2020-09-17 14:23:23,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:23,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494817913] [2020-09-17 14:23:23,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:23,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:23,321 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 14:23:23,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494817913] [2020-09-17 14:23:23,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605749709] [2020-09-17 14:23:23,321 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 14:23:23,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-17 14:23:23,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:23,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 14:23:23,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:23,583 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 14:23:23,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:23,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 20 [2020-09-17 14:23:23,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574505514] [2020-09-17 14:23:23,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 14:23:23,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:23,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 14:23:23,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2020-09-17 14:23:23,586 INFO L87 Difference]: Start difference. First operand 520 states and 718 transitions. Second operand 20 states. [2020-09-17 14:23:26,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:26,269 INFO L93 Difference]: Finished difference Result 700 states and 941 transitions. [2020-09-17 14:23:26,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-09-17 14:23:26,270 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 67 [2020-09-17 14:23:26,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:26,273 INFO L225 Difference]: With dead ends: 700 [2020-09-17 14:23:26,274 INFO L226 Difference]: Without dead ends: 700 [2020-09-17 14:23:26,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2622 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2548, Invalid=5824, Unknown=0, NotChecked=0, Total=8372 [2020-09-17 14:23:26,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2020-09-17 14:23:26,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 643. [2020-09-17 14:23:26,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-09-17 14:23:26,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 874 transitions. [2020-09-17 14:23:26,290 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 874 transitions. Word has length 67 [2020-09-17 14:23:26,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:26,291 INFO L479 AbstractCegarLoop]: Abstraction has 643 states and 874 transitions. [2020-09-17 14:23:26,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 14:23:26,291 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 874 transitions. [2020-09-17 14:23:26,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-09-17 14:23:26,293 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:26,293 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:26,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-17 14:23:26,505 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:26,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:26,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1171001041, now seen corresponding path program 13 times [2020-09-17 14:23:26,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:26,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812624161] [2020-09-17 14:23:26,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:26,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:26,785 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 14:23:26,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812624161] [2020-09-17 14:23:26,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213729067] [2020-09-17 14:23:26,786 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 14:23:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:26,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 14:23:26,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:26,955 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 14:23:26,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:26,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 14:23:26,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926791524] [2020-09-17 14:23:26,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 14:23:26,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:26,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 14:23:26,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-09-17 14:23:26,958 INFO L87 Difference]: Start difference. First operand 643 states and 874 transitions. Second operand 16 states. [2020-09-17 14:23:27,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:27,026 INFO L93 Difference]: Finished difference Result 718 states and 970 transitions. [2020-09-17 14:23:27,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 14:23:27,026 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 74 [2020-09-17 14:23:27,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:27,030 INFO L225 Difference]: With dead ends: 718 [2020-09-17 14:23:27,030 INFO L226 Difference]: Without dead ends: 718 [2020-09-17 14:23:27,032 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 14:23:27,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2020-09-17 14:23:27,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 691. [2020-09-17 14:23:27,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2020-09-17 14:23:27,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 937 transitions. [2020-09-17 14:23:27,051 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 937 transitions. Word has length 74 [2020-09-17 14:23:27,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:27,051 INFO L479 AbstractCegarLoop]: Abstraction has 691 states and 937 transitions. [2020-09-17 14:23:27,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 14:23:27,052 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 937 transitions. [2020-09-17 14:23:27,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-17 14:23:27,054 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:27,054 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:27,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-17 14:23:27,267 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:27,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:27,268 INFO L82 PathProgramCache]: Analyzing trace with hash 776210049, now seen corresponding path program 14 times [2020-09-17 14:23:27,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:27,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313963948] [2020-09-17 14:23:27,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:27,553 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 14:23:27,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313963948] [2020-09-17 14:23:27,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013147972] [2020-09-17 14:23:27,554 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 14:23:27,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:23:27,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:27,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 14:23:27,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:27,706 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 14:23:27,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:27,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 14:23:27,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137152048] [2020-09-17 14:23:27,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 14:23:27,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:27,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 14:23:27,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-17 14:23:27,711 INFO L87 Difference]: Start difference. First operand 691 states and 937 transitions. Second operand 17 states. [2020-09-17 14:23:27,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:27,792 INFO L93 Difference]: Finished difference Result 766 states and 1033 transitions. [2020-09-17 14:23:27,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 14:23:27,793 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 78 [2020-09-17 14:23:27,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:27,796 INFO L225 Difference]: With dead ends: 766 [2020-09-17 14:23:27,796 INFO L226 Difference]: Without dead ends: 766 [2020-09-17 14:23:27,797 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 14:23:27,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2020-09-17 14:23:27,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 739. [2020-09-17 14:23:27,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 739 states. [2020-09-17 14:23:27,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1000 transitions. [2020-09-17 14:23:27,813 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1000 transitions. Word has length 78 [2020-09-17 14:23:27,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:27,813 INFO L479 AbstractCegarLoop]: Abstraction has 739 states and 1000 transitions. [2020-09-17 14:23:27,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 14:23:27,814 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1000 transitions. [2020-09-17 14:23:27,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-09-17 14:23:27,816 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:27,816 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:28,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-17 14:23:28,033 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:28,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:28,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1187324627, now seen corresponding path program 15 times [2020-09-17 14:23:28,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:28,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938872562] [2020-09-17 14:23:28,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:28,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:28,420 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 14:23:28,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938872562] [2020-09-17 14:23:28,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011772648] [2020-09-17 14:23:28,427 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 14:23:28,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-17 14:23:28,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:28,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 14:23:28,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:28,807 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 14:23:28,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:28,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 24 [2020-09-17 14:23:28,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782537291] [2020-09-17 14:23:28,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 14:23:28,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:28,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 14:23:28,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2020-09-17 14:23:28,818 INFO L87 Difference]: Start difference. First operand 739 states and 1000 transitions. Second operand 24 states. [2020-09-17 14:23:33,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:33,350 INFO L93 Difference]: Finished difference Result 952 states and 1260 transitions. [2020-09-17 14:23:33,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2020-09-17 14:23:33,351 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 82 [2020-09-17 14:23:33,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:33,355 INFO L225 Difference]: With dead ends: 952 [2020-09-17 14:23:33,356 INFO L226 Difference]: Without dead ends: 952 [2020-09-17 14:23:33,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5558 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4896, Invalid=11616, Unknown=0, NotChecked=0, Total=16512 [2020-09-17 14:23:33,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2020-09-17 14:23:33,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 886. [2020-09-17 14:23:33,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 886 states. [2020-09-17 14:23:33,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1184 transitions. [2020-09-17 14:23:33,377 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1184 transitions. Word has length 82 [2020-09-17 14:23:33,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:33,378 INFO L479 AbstractCegarLoop]: Abstraction has 886 states and 1184 transitions. [2020-09-17 14:23:33,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 14:23:33,378 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1184 transitions. [2020-09-17 14:23:33,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-17 14:23:33,380 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:33,380 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:33,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:33,597 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:33,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:33,597 INFO L82 PathProgramCache]: Analyzing trace with hash -933866561, now seen corresponding path program 16 times [2020-09-17 14:23:33,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:33,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018718922] [2020-09-17 14:23:33,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:33,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:33,909 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 14:23:33,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018718922] [2020-09-17 14:23:33,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941236164] [2020-09-17 14:23:33,910 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 14:23:34,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:23:34,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:34,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 14:23:34,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:34,267 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 14:23:34,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:34,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 14:23:34,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158863805] [2020-09-17 14:23:34,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 14:23:34,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:34,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 14:23:34,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-09-17 14:23:34,269 INFO L87 Difference]: Start difference. First operand 886 states and 1184 transitions. Second operand 19 states. [2020-09-17 14:23:34,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:34,364 INFO L93 Difference]: Finished difference Result 970 states and 1290 transitions. [2020-09-17 14:23:34,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 14:23:34,369 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 89 [2020-09-17 14:23:34,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:34,374 INFO L225 Difference]: With dead ends: 970 [2020-09-17 14:23:34,374 INFO L226 Difference]: Without dead ends: 970 [2020-09-17 14:23:34,374 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 14:23:34,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-09-17 14:23:34,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 940. [2020-09-17 14:23:34,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 940 states. [2020-09-17 14:23:34,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1254 transitions. [2020-09-17 14:23:34,393 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1254 transitions. Word has length 89 [2020-09-17 14:23:34,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:34,393 INFO L479 AbstractCegarLoop]: Abstraction has 940 states and 1254 transitions. [2020-09-17 14:23:34,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 14:23:34,393 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1254 transitions. [2020-09-17 14:23:34,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-09-17 14:23:34,396 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:34,396 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:34,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-17 14:23:34,609 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:34,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:34,610 INFO L82 PathProgramCache]: Analyzing trace with hash -365776851, now seen corresponding path program 17 times [2020-09-17 14:23:34,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:34,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548746456] [2020-09-17 14:23:34,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:34,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:35,005 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 14:23:35,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548746456] [2020-09-17 14:23:35,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798724806] [2020-09-17 14:23:35,006 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 14:23:35,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-09-17 14:23:35,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:35,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 14:23:35,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:35,258 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 14:23:35,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:35,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 14:23:35,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509064545] [2020-09-17 14:23:35,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 14:23:35,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:35,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 14:23:35,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-17 14:23:35,260 INFO L87 Difference]: Start difference. First operand 940 states and 1254 transitions. Second operand 20 states. [2020-09-17 14:23:35,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:35,360 INFO L93 Difference]: Finished difference Result 1024 states and 1360 transitions. [2020-09-17 14:23:35,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 14:23:35,360 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 93 [2020-09-17 14:23:35,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:35,366 INFO L225 Difference]: With dead ends: 1024 [2020-09-17 14:23:35,366 INFO L226 Difference]: Without dead ends: 1024 [2020-09-17 14:23:35,367 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 14:23:35,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2020-09-17 14:23:35,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 994. [2020-09-17 14:23:35,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 994 states. [2020-09-17 14:23:35,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1324 transitions. [2020-09-17 14:23:35,385 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1324 transitions. Word has length 93 [2020-09-17 14:23:35,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:35,386 INFO L479 AbstractCegarLoop]: Abstraction has 994 states and 1324 transitions. [2020-09-17 14:23:35,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 14:23:35,386 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1324 transitions. [2020-09-17 14:23:35,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-17 14:23:35,388 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:35,389 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:35,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:35,603 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:35,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:35,604 INFO L82 PathProgramCache]: Analyzing trace with hash -728816229, now seen corresponding path program 18 times [2020-09-17 14:23:35,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:35,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280083420] [2020-09-17 14:23:35,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:35,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:36,035 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 14:23:36,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280083420] [2020-09-17 14:23:36,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124197898] [2020-09-17 14:23:36,037 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 14:23:36,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-09-17 14:23:36,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:36,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 14:23:36,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:36,602 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 14:23:36,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:36,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10] total 28 [2020-09-17 14:23:36,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240443266] [2020-09-17 14:23:36,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 14:23:36,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:36,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 14:23:36,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-09-17 14:23:36,605 INFO L87 Difference]: Start difference. First operand 994 states and 1324 transitions. Second operand 28 states. [2020-09-17 14:23:44,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:44,185 INFO L93 Difference]: Finished difference Result 1240 states and 1621 transitions. [2020-09-17 14:23:44,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2020-09-17 14:23:44,189 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 97 [2020-09-17 14:23:44,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:44,193 INFO L225 Difference]: With dead ends: 1240 [2020-09-17 14:23:44,193 INFO L226 Difference]: Without dead ends: 1240 [2020-09-17 14:23:44,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10432 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=8550, Invalid=20862, Unknown=0, NotChecked=0, Total=29412 [2020-09-17 14:23:44,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2020-09-17 14:23:44,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1165. [2020-09-17 14:23:44,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1165 states. [2020-09-17 14:23:44,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 1536 transitions. [2020-09-17 14:23:44,223 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 1536 transitions. Word has length 97 [2020-09-17 14:23:44,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:44,223 INFO L479 AbstractCegarLoop]: Abstraction has 1165 states and 1536 transitions. [2020-09-17 14:23:44,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 14:23:44,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 1536 transitions. [2020-09-17 14:23:44,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-09-17 14:23:44,226 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:44,227 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:44,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:44,443 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:44,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:44,443 INFO L82 PathProgramCache]: Analyzing trace with hash 110062427, now seen corresponding path program 19 times [2020-09-17 14:23:44,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:44,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200106342] [2020-09-17 14:23:44,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:44,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:44,950 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 14:23:44,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200106342] [2020-09-17 14:23:44,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048639776] [2020-09-17 14:23:44,951 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 14:23:45,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:45,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 14:23:45,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:45,107 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 14:23:45,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:45,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 14:23:45,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335002378] [2020-09-17 14:23:45,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 14:23:45,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:45,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 14:23:45,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-09-17 14:23:45,111 INFO L87 Difference]: Start difference. First operand 1165 states and 1536 transitions. Second operand 22 states. [2020-09-17 14:23:45,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:45,221 INFO L93 Difference]: Finished difference Result 1258 states and 1652 transitions. [2020-09-17 14:23:45,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 14:23:45,222 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 104 [2020-09-17 14:23:45,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:45,226 INFO L225 Difference]: With dead ends: 1258 [2020-09-17 14:23:45,226 INFO L226 Difference]: Without dead ends: 1258 [2020-09-17 14:23:45,226 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 14:23:45,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2020-09-17 14:23:45,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1225. [2020-09-17 14:23:45,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1225 states. [2020-09-17 14:23:45,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 1613 transitions. [2020-09-17 14:23:45,245 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 1613 transitions. Word has length 104 [2020-09-17 14:23:45,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:45,246 INFO L479 AbstractCegarLoop]: Abstraction has 1225 states and 1613 transitions. [2020-09-17 14:23:45,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 14:23:45,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 1613 transitions. [2020-09-17 14:23:45,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-09-17 14:23:45,250 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:45,250 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:45,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-17 14:23:45,464 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:45,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:45,465 INFO L82 PathProgramCache]: Analyzing trace with hash -912464595, now seen corresponding path program 20 times [2020-09-17 14:23:45,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:45,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864371794] [2020-09-17 14:23:45,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:45,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:45,924 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 14:23:45,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864371794] [2020-09-17 14:23:45,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829717074] [2020-09-17 14:23:45,925 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 14:23:46,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:23:46,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:46,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 14:23:46,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:46,205 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 14:23:46,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:46,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 14:23:46,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990418261] [2020-09-17 14:23:46,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 14:23:46,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:46,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 14:23:46,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-17 14:23:46,209 INFO L87 Difference]: Start difference. First operand 1225 states and 1613 transitions. Second operand 23 states. [2020-09-17 14:23:46,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:46,342 INFO L93 Difference]: Finished difference Result 1285 states and 1690 transitions. [2020-09-17 14:23:46,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 14:23:46,343 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 108 [2020-09-17 14:23:46,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:46,350 INFO L225 Difference]: With dead ends: 1285 [2020-09-17 14:23:46,351 INFO L226 Difference]: Without dead ends: 1285 [2020-09-17 14:23:46,351 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 14:23:46,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2020-09-17 14:23:46,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1285. [2020-09-17 14:23:46,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1285 states. [2020-09-17 14:23:46,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 1690 transitions. [2020-09-17 14:23:46,381 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 1690 transitions. Word has length 108 [2020-09-17 14:23:46,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:46,382 INFO L479 AbstractCegarLoop]: Abstraction has 1285 states and 1690 transitions. [2020-09-17 14:23:46,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 14:23:46,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 1690 transitions. [2020-09-17 14:23:46,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-09-17 14:23:46,387 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:46,388 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:46,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:46,601 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:46,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:46,602 INFO L82 PathProgramCache]: Analyzing trace with hash -220912129, now seen corresponding path program 21 times [2020-09-17 14:23:46,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:46,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523116141] [2020-09-17 14:23:46,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:46,910 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 14:23:46,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523116141] [2020-09-17 14:23:46,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851810586] [2020-09-17 14:23:46,912 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 14:23:47,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 14:23:47,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:47,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 14:23:47,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:47,106 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 14:23:47,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:47,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-17 14:23:47,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32206669] [2020-09-17 14:23:47,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 14:23:47,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:47,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 14:23:47,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-09-17 14:23:47,108 INFO L87 Difference]: Start difference. First operand 1285 states and 1690 transitions. Second operand 12 states. [2020-09-17 14:23:47,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:47,165 INFO L93 Difference]: Finished difference Result 1460 states and 1896 transitions. [2020-09-17 14:23:47,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 14:23:47,166 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 112 [2020-09-17 14:23:47,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:47,172 INFO L225 Difference]: With dead ends: 1460 [2020-09-17 14:23:47,173 INFO L226 Difference]: Without dead ends: 1460 [2020-09-17 14:23:47,173 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 14:23:47,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2020-09-17 14:23:47,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1414. [2020-09-17 14:23:47,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1414 states. [2020-09-17 14:23:47,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 1846 transitions. [2020-09-17 14:23:47,196 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 1846 transitions. Word has length 112 [2020-09-17 14:23:47,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:47,197 INFO L479 AbstractCegarLoop]: Abstraction has 1414 states and 1846 transitions. [2020-09-17 14:23:47,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 14:23:47,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 1846 transitions. [2020-09-17 14:23:47,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-09-17 14:23:47,201 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:47,201 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:47,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-17 14:23:47,414 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:47,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:47,415 INFO L82 PathProgramCache]: Analyzing trace with hash 2018487717, now seen corresponding path program 22 times [2020-09-17 14:23:47,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:47,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245053147] [2020-09-17 14:23:47,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:47,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:47,803 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 14:23:47,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245053147] [2020-09-17 14:23:47,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203326482] [2020-09-17 14:23:47,803 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 14:23:48,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:23:48,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:48,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 14:23:48,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:49,021 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 14:23:49,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:49,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-17 14:23:49,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583541271] [2020-09-17 14:23:49,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 14:23:49,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:49,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 14:23:49,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-09-17 14:23:49,023 INFO L87 Difference]: Start difference. First operand 1414 states and 1846 transitions. Second operand 13 states. [2020-09-17 14:23:49,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:49,111 INFO L93 Difference]: Finished difference Result 1589 states and 2052 transitions. [2020-09-17 14:23:49,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 14:23:49,111 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 115 [2020-09-17 14:23:49,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:49,118 INFO L225 Difference]: With dead ends: 1589 [2020-09-17 14:23:49,118 INFO L226 Difference]: Without dead ends: 1589 [2020-09-17 14:23:49,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-09-17 14:23:49,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2020-09-17 14:23:49,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1543. [2020-09-17 14:23:49,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-09-17 14:23:49,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2002 transitions. [2020-09-17 14:23:49,142 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2002 transitions. Word has length 115 [2020-09-17 14:23:49,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:49,142 INFO L479 AbstractCegarLoop]: Abstraction has 1543 states and 2002 transitions. [2020-09-17 14:23:49,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 14:23:49,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2002 transitions. [2020-09-17 14:23:49,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-09-17 14:23:49,147 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:49,147 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:49,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-17 14:23:49,360 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:49,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:49,361 INFO L82 PathProgramCache]: Analyzing trace with hash -2042676161, now seen corresponding path program 23 times [2020-09-17 14:23:49,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:49,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686746447] [2020-09-17 14:23:49,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:49,772 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 14:23:49,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686746447] [2020-09-17 14:23:49,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685358922] [2020-09-17 14:23:49,773 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 14:23:50,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-09-17 14:23:50,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:50,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 14:23:50,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:50,159 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 14:23:50,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:50,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-17 14:23:50,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663987624] [2020-09-17 14:23:50,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 14:23:50,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:50,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 14:23:50,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-09-17 14:23:50,162 INFO L87 Difference]: Start difference. First operand 1543 states and 2002 transitions. Second operand 14 states. [2020-09-17 14:23:50,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:50,230 INFO L93 Difference]: Finished difference Result 1718 states and 2208 transitions. [2020-09-17 14:23:50,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 14:23:50,231 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 118 [2020-09-17 14:23:50,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:50,238 INFO L225 Difference]: With dead ends: 1718 [2020-09-17 14:23:50,239 INFO L226 Difference]: Without dead ends: 1718 [2020-09-17 14:23:50,239 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 14:23:50,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2020-09-17 14:23:50,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1672. [2020-09-17 14:23:50,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1672 states. [2020-09-17 14:23:50,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2158 transitions. [2020-09-17 14:23:50,264 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2158 transitions. Word has length 118 [2020-09-17 14:23:50,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:50,265 INFO L479 AbstractCegarLoop]: Abstraction has 1672 states and 2158 transitions. [2020-09-17 14:23:50,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 14:23:50,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2158 transitions. [2020-09-17 14:23:50,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-09-17 14:23:50,270 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:50,270 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:50,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:50,485 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:50,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:50,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1052962661, now seen corresponding path program 24 times [2020-09-17 14:23:50,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:50,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919775142] [2020-09-17 14:23:50,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:50,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:50,821 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 14:23:50,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919775142] [2020-09-17 14:23:50,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191784346] [2020-09-17 14:23:50,822 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 14:23:51,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-09-17 14:23:51,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:51,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 14:23:51,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:51,252 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 14:23:51,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:51,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-17 14:23:51,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178442441] [2020-09-17 14:23:51,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 14:23:51,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:51,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 14:23:51,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-09-17 14:23:51,254 INFO L87 Difference]: Start difference. First operand 1672 states and 2158 transitions. Second operand 15 states. [2020-09-17 14:23:51,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:51,358 INFO L93 Difference]: Finished difference Result 1847 states and 2364 transitions. [2020-09-17 14:23:51,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 14:23:51,359 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2020-09-17 14:23:51,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:51,366 INFO L225 Difference]: With dead ends: 1847 [2020-09-17 14:23:51,366 INFO L226 Difference]: Without dead ends: 1847 [2020-09-17 14:23:51,367 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 14:23:51,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2020-09-17 14:23:51,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1801. [2020-09-17 14:23:51,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1801 states. [2020-09-17 14:23:51,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2314 transitions. [2020-09-17 14:23:51,394 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2314 transitions. Word has length 121 [2020-09-17 14:23:51,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:51,395 INFO L479 AbstractCegarLoop]: Abstraction has 1801 states and 2314 transitions. [2020-09-17 14:23:51,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 14:23:51,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2314 transitions. [2020-09-17 14:23:51,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-09-17 14:23:51,400 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:51,400 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:51,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-17 14:23:51,613 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:51,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:51,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1691329151, now seen corresponding path program 25 times [2020-09-17 14:23:51,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:51,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721373572] [2020-09-17 14:23:51,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:51,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:51,967 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 14:23:51,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721373572] [2020-09-17 14:23:51,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906473403] [2020-09-17 14:23:51,968 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 14:23:52,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:52,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 14:23:52,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:52,144 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 14:23:52,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:52,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 14:23:52,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979227810] [2020-09-17 14:23:52,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 14:23:52,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:52,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 14:23:52,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-09-17 14:23:52,147 INFO L87 Difference]: Start difference. First operand 1801 states and 2314 transitions. Second operand 16 states. [2020-09-17 14:23:52,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:52,272 INFO L93 Difference]: Finished difference Result 1976 states and 2520 transitions. [2020-09-17 14:23:52,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 14:23:52,273 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 124 [2020-09-17 14:23:52,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:52,282 INFO L225 Difference]: With dead ends: 1976 [2020-09-17 14:23:52,282 INFO L226 Difference]: Without dead ends: 1976 [2020-09-17 14:23:52,282 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 14:23:52,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2020-09-17 14:23:52,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1930. [2020-09-17 14:23:52,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1930 states. [2020-09-17 14:23:52,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2470 transitions. [2020-09-17 14:23:52,313 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2470 transitions. Word has length 124 [2020-09-17 14:23:52,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:52,338 INFO L479 AbstractCegarLoop]: Abstraction has 1930 states and 2470 transitions. [2020-09-17 14:23:52,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 14:23:52,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2470 transitions. [2020-09-17 14:23:52,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-09-17 14:23:52,342 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:52,343 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:52,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:52,557 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:52,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:52,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1152246053, now seen corresponding path program 26 times [2020-09-17 14:23:52,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:52,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228491103] [2020-09-17 14:23:52,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:52,925 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 14:23:52,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228491103] [2020-09-17 14:23:52,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652320849] [2020-09-17 14:23:52,926 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 14:23:53,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:23:53,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:53,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 14:23:53,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:53,113 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 14:23:53,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:53,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 14:23:53,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023038496] [2020-09-17 14:23:53,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 14:23:53,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:53,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 14:23:53,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-17 14:23:53,115 INFO L87 Difference]: Start difference. First operand 1930 states and 2470 transitions. Second operand 17 states. [2020-09-17 14:23:53,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:53,202 INFO L93 Difference]: Finished difference Result 2105 states and 2676 transitions. [2020-09-17 14:23:53,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 14:23:53,203 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 127 [2020-09-17 14:23:53,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:53,210 INFO L225 Difference]: With dead ends: 2105 [2020-09-17 14:23:53,210 INFO L226 Difference]: Without dead ends: 2105 [2020-09-17 14:23:53,210 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 14:23:53,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2020-09-17 14:23:53,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 2059. [2020-09-17 14:23:53,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2059 states. [2020-09-17 14:23:53,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 2626 transitions. [2020-09-17 14:23:53,239 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 2626 transitions. Word has length 127 [2020-09-17 14:23:53,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:53,239 INFO L479 AbstractCegarLoop]: Abstraction has 2059 states and 2626 transitions. [2020-09-17 14:23:53,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 14:23:53,239 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 2626 transitions. [2020-09-17 14:23:53,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-09-17 14:23:53,243 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:53,244 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:53,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-17 14:23:53,458 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:53,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:53,459 INFO L82 PathProgramCache]: Analyzing trace with hash 210393279, now seen corresponding path program 27 times [2020-09-17 14:23:53,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:53,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288581328] [2020-09-17 14:23:53,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:53,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:53,873 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 14:23:53,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288581328] [2020-09-17 14:23:53,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184408893] [2020-09-17 14:23:53,874 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 14:23:54,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-09-17 14:23:54,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:54,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 14:23:54,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:54,228 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 14:23:54,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:54,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 14:23:54,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009749997] [2020-09-17 14:23:54,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 14:23:54,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:54,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 14:23:54,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-17 14:23:54,231 INFO L87 Difference]: Start difference. First operand 2059 states and 2626 transitions. Second operand 18 states. [2020-09-17 14:23:54,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:54,318 INFO L93 Difference]: Finished difference Result 2234 states and 2832 transitions. [2020-09-17 14:23:54,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 14:23:54,319 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 130 [2020-09-17 14:23:54,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:54,327 INFO L225 Difference]: With dead ends: 2234 [2020-09-17 14:23:54,327 INFO L226 Difference]: Without dead ends: 2234 [2020-09-17 14:23:54,327 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 14:23:54,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2020-09-17 14:23:54,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2188. [2020-09-17 14:23:54,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2188 states. [2020-09-17 14:23:54,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 2782 transitions. [2020-09-17 14:23:54,356 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 2782 transitions. Word has length 130 [2020-09-17 14:23:54,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:54,357 INFO L479 AbstractCegarLoop]: Abstraction has 2188 states and 2782 transitions. [2020-09-17 14:23:54,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 14:23:54,357 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 2782 transitions. [2020-09-17 14:23:54,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-09-17 14:23:54,361 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:54,362 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:54,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-17 14:23:54,576 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:54,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:54,577 INFO L82 PathProgramCache]: Analyzing trace with hash 495747813, now seen corresponding path program 28 times [2020-09-17 14:23:54,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:54,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856949532] [2020-09-17 14:23:54,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:54,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:55,131 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 14:23:55,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856949532] [2020-09-17 14:23:55,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21105912] [2020-09-17 14:23:55,132 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 14:23:56,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:23:56,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:56,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 14:23:56,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:56,693 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 14:23:56,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:56,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 14:23:56,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848988455] [2020-09-17 14:23:56,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 14:23:56,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:56,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 14:23:56,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-09-17 14:23:56,697 INFO L87 Difference]: Start difference. First operand 2188 states and 2782 transitions. Second operand 19 states. [2020-09-17 14:23:56,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:56,800 INFO L93 Difference]: Finished difference Result 2363 states and 2988 transitions. [2020-09-17 14:23:56,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 14:23:56,800 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 133 [2020-09-17 14:23:56,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:56,809 INFO L225 Difference]: With dead ends: 2363 [2020-09-17 14:23:56,810 INFO L226 Difference]: Without dead ends: 2363 [2020-09-17 14:23:56,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-09-17 14:23:56,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2020-09-17 14:23:56,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 2317. [2020-09-17 14:23:56,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2317 states. [2020-09-17 14:23:56,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 2938 transitions. [2020-09-17 14:23:56,842 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 2938 transitions. Word has length 133 [2020-09-17 14:23:56,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:56,843 INFO L479 AbstractCegarLoop]: Abstraction has 2317 states and 2938 transitions. [2020-09-17 14:23:56,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 14:23:56,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 2938 transitions. [2020-09-17 14:23:56,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-17 14:23:56,848 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:56,848 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:57,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:57,063 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:57,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:57,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1752391423, now seen corresponding path program 29 times [2020-09-17 14:23:57,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:57,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458278057] [2020-09-17 14:23:57,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:57,540 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 14:23:57,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458278057] [2020-09-17 14:23:57,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851025181] [2020-09-17 14:23:57,541 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 14:23:57,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-09-17 14:23:57,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:57,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 14:23:57,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:57,896 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 14:23:57,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:57,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 14:23:57,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910177905] [2020-09-17 14:23:57,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 14:23:57,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:57,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 14:23:57,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-17 14:23:57,898 INFO L87 Difference]: Start difference. First operand 2317 states and 2938 transitions. Second operand 20 states. [2020-09-17 14:23:58,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:58,029 INFO L93 Difference]: Finished difference Result 2492 states and 3144 transitions. [2020-09-17 14:23:58,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 14:23:58,029 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 136 [2020-09-17 14:23:58,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:58,048 INFO L225 Difference]: With dead ends: 2492 [2020-09-17 14:23:58,049 INFO L226 Difference]: Without dead ends: 2492 [2020-09-17 14:23:58,049 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 14:23:58,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2020-09-17 14:23:58,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 2446. [2020-09-17 14:23:58,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2446 states. [2020-09-17 14:23:58,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2446 states to 2446 states and 3094 transitions. [2020-09-17 14:23:58,092 INFO L78 Accepts]: Start accepts. Automaton has 2446 states and 3094 transitions. Word has length 136 [2020-09-17 14:23:58,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:58,092 INFO L479 AbstractCegarLoop]: Abstraction has 2446 states and 3094 transitions. [2020-09-17 14:23:58,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 14:23:58,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2446 states and 3094 transitions. [2020-09-17 14:23:58,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-17 14:23:58,097 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:58,097 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:58,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:58,312 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:58,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:58,313 INFO L82 PathProgramCache]: Analyzing trace with hash -807742299, now seen corresponding path program 30 times [2020-09-17 14:23:58,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:58,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714301962] [2020-09-17 14:23:58,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:58,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:58,826 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 14:23:58,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714301962] [2020-09-17 14:23:58,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793731983] [2020-09-17 14:23:58,827 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 14:23:59,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-09-17 14:23:59,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:59,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 14:23:59,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:59,458 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 14:23:59,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:59,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 14:23:59,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64658784] [2020-09-17 14:23:59,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 14:23:59,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:59,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 14:23:59,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-09-17 14:23:59,460 INFO L87 Difference]: Start difference. First operand 2446 states and 3094 transitions. Second operand 21 states. [2020-09-17 14:23:59,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:59,558 INFO L93 Difference]: Finished difference Result 2621 states and 3300 transitions. [2020-09-17 14:23:59,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 14:23:59,558 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 139 [2020-09-17 14:23:59,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:59,563 INFO L225 Difference]: With dead ends: 2621 [2020-09-17 14:23:59,563 INFO L226 Difference]: Without dead ends: 2621 [2020-09-17 14:23:59,563 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 14:23:59,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2621 states. [2020-09-17 14:23:59,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2621 to 2575. [2020-09-17 14:23:59,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2575 states. [2020-09-17 14:23:59,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 3250 transitions. [2020-09-17 14:23:59,590 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 3250 transitions. Word has length 139 [2020-09-17 14:23:59,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:59,590 INFO L479 AbstractCegarLoop]: Abstraction has 2575 states and 3250 transitions. [2020-09-17 14:23:59,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 14:23:59,591 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 3250 transitions. [2020-09-17 14:23:59,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-09-17 14:23:59,595 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:59,595 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:59,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-17 14:23:59,796 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:59,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:59,797 INFO L82 PathProgramCache]: Analyzing trace with hash 277787967, now seen corresponding path program 31 times [2020-09-17 14:23:59,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:59,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580008251] [2020-09-17 14:23:59,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:59,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:24:00,299 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 14:24:00,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580008251] [2020-09-17 14:24:00,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455294724] [2020-09-17 14:24:00,300 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 14:24:00,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:24:00,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 14:24:00,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:24:00,506 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 14:24:00,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:24:00,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 14:24:00,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11190001] [2020-09-17 14:24:00,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 14:24:00,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:24:00,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 14:24:00,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-09-17 14:24:00,511 INFO L87 Difference]: Start difference. First operand 2575 states and 3250 transitions. Second operand 22 states. [2020-09-17 14:24:00,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:24:00,693 INFO L93 Difference]: Finished difference Result 2750 states and 3456 transitions. [2020-09-17 14:24:00,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 14:24:00,694 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 142 [2020-09-17 14:24:00,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:24:00,698 INFO L225 Difference]: With dead ends: 2750 [2020-09-17 14:24:00,699 INFO L226 Difference]: Without dead ends: 2750 [2020-09-17 14:24:00,701 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 14:24:00,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2020-09-17 14:24:00,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 2704. [2020-09-17 14:24:00,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2704 states. [2020-09-17 14:24:00,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2704 states to 2704 states and 3406 transitions. [2020-09-17 14:24:00,752 INFO L78 Accepts]: Start accepts. Automaton has 2704 states and 3406 transitions. Word has length 142 [2020-09-17 14:24:00,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:24:00,753 INFO L479 AbstractCegarLoop]: Abstraction has 2704 states and 3406 transitions. [2020-09-17 14:24:00,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 14:24:00,753 INFO L276 IsEmpty]: Start isEmpty. Operand 2704 states and 3406 transitions. [2020-09-17 14:24:00,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-09-17 14:24:00,758 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:24:00,759 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:24:00,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:24:00,972 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:24:00,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:24:00,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1793796507, now seen corresponding path program 32 times [2020-09-17 14:24:00,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:24:00,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226541672] [2020-09-17 14:24:00,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:24:01,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:24:01,525 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 14:24:01,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226541672] [2020-09-17 14:24:01,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401994788] [2020-09-17 14:24:01,526 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 14:24:01,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:24:01,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:24:01,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 14:24:01,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:24:01,749 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 14:24:01,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:24:01,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 14:24:01,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593128958] [2020-09-17 14:24:01,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 14:24:01,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:24:01,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 14:24:01,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-17 14:24:01,752 INFO L87 Difference]: Start difference. First operand 2704 states and 3406 transitions. Second operand 23 states. [2020-09-17 14:24:01,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:24:01,878 INFO L93 Difference]: Finished difference Result 2833 states and 3562 transitions. [2020-09-17 14:24:01,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 14:24:01,878 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 145 [2020-09-17 14:24:01,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:24:01,883 INFO L225 Difference]: With dead ends: 2833 [2020-09-17 14:24:01,883 INFO L226 Difference]: Without dead ends: 2833 [2020-09-17 14:24:01,884 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 14:24:01,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2020-09-17 14:24:01,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 2833. [2020-09-17 14:24:01,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2833 states. [2020-09-17 14:24:01,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2833 states to 2833 states and 3562 transitions. [2020-09-17 14:24:01,915 INFO L78 Accepts]: Start accepts. Automaton has 2833 states and 3562 transitions. Word has length 145 [2020-09-17 14:24:01,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:24:01,916 INFO L479 AbstractCegarLoop]: Abstraction has 2833 states and 3562 transitions. [2020-09-17 14:24:01,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 14:24:01,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2833 states and 3562 transitions. [2020-09-17 14:24:01,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-17 14:24:01,921 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:24:01,922 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:24:02,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-17 14:24:02,137 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:24:02,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:24:02,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1981785217, now seen corresponding path program 33 times [2020-09-17 14:24:02,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:24:02,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115094152] [2020-09-17 14:24:02,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:24:02,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:24:05,691 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 14:24:05,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115094152] [2020-09-17 14:24:05,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764475126] [2020-09-17 14:24:05,692 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 14:24:06,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-09-17 14:24:06,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:24:06,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-17 14:24:06,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:24:06,631 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 14:24:06,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:24:06,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-17 14:24:06,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188265017] [2020-09-17 14:24:06,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-17 14:24:06,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:24:06,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-17 14:24:06,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 14:24:06,633 INFO L87 Difference]: Start difference. First operand 2833 states and 3562 transitions. Second operand 63 states. [2020-09-17 14:25:45,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:25:45,939 INFO L93 Difference]: Finished difference Result 32926 states and 45933 transitions. [2020-09-17 14:25:45,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 633 states. [2020-09-17 14:25:45,940 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-17 14:25:45,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:25:45,992 INFO L225 Difference]: With dead ends: 32926 [2020-09-17 14:25:45,992 INFO L226 Difference]: Without dead ends: 32924 [2020-09-17 14:25:46,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 632 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162735 ImplicationChecksByTransitivity, 38.5s TimeCoverageRelationStatistics Valid=2407, Invalid=398915, Unknown=0, NotChecked=0, Total=401322 [2020-09-17 14:25:46,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32924 states. [2020-09-17 14:25:46,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32924 to 2967. [2020-09-17 14:25:46,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2967 states. [2020-09-17 14:25:46,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2967 states to 2967 states and 3794 transitions. [2020-09-17 14:25:46,267 INFO L78 Accepts]: Start accepts. Automaton has 2967 states and 3794 transitions. Word has length 148 [2020-09-17 14:25:46,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:25:46,268 INFO L479 AbstractCegarLoop]: Abstraction has 2967 states and 3794 transitions. [2020-09-17 14:25:46,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-17 14:25:46,268 INFO L276 IsEmpty]: Start isEmpty. Operand 2967 states and 3794 transitions. [2020-09-17 14:25:46,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-17 14:25:46,273 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:25:46,273 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:25:46,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-09-17 14:25:46,486 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:25:46,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:25:46,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1970430061, now seen corresponding path program 34 times [2020-09-17 14:25:46,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:25:46,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588347338] [2020-09-17 14:25:46,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:25:46,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:25:50,224 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 14:25:50,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588347338] [2020-09-17 14:25:50,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220737215] [2020-09-17 14:25:50,224 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 14:25:52,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:25:52,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:25:52,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-17 14:25:52,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:25:52,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:25:52,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:25:52,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-17 14:25:52,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465163789] [2020-09-17 14:25:52,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-17 14:25:52,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:25:52,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-17 14:25:52,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 14:25:52,399 INFO L87 Difference]: Start difference. First operand 2967 states and 3794 transitions. Second operand 63 states. [2020-09-17 14:27:33,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:27:33,111 INFO L93 Difference]: Finished difference Result 30945 states and 43173 transitions. [2020-09-17 14:27:33,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-09-17 14:27:33,112 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-17 14:27:33,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:27:33,153 INFO L225 Difference]: With dead ends: 30945 [2020-09-17 14:27:33,154 INFO L226 Difference]: Without dead ends: 30943 [2020-09-17 14:27:33,166 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 14:27:33,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30943 states. [2020-09-17 14:27:33,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30943 to 2973. [2020-09-17 14:27:33,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2973 states. [2020-09-17 14:27:33,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 3801 transitions. [2020-09-17 14:27:33,347 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 3801 transitions. Word has length 148 [2020-09-17 14:27:33,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:27:33,348 INFO L479 AbstractCegarLoop]: Abstraction has 2973 states and 3801 transitions. [2020-09-17 14:27:33,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-17 14:27:33,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 3801 transitions. [2020-09-17 14:27:33,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-17 14:27:33,353 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:27:33,353 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:27:33,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-17 14:27:33,567 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:27:33,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:27:33,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1092472257, now seen corresponding path program 35 times [2020-09-17 14:27:33,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:27:33,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161413689] [2020-09-17 14:27:33,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:27:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:27:37,504 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 14:27:37,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161413689] [2020-09-17 14:27:37,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916249731] [2020-09-17 14:27:37,505 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 14:27:37,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-09-17 14:27:37,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:27:37,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-17 14:27:37,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:27:38,001 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 14:27:38,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:27:38,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-17 14:27:38,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451580793] [2020-09-17 14:27:38,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-17 14:27:38,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:27:38,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-17 14:27:38,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 14:27:38,006 INFO L87 Difference]: Start difference. First operand 2973 states and 3801 transitions. Second operand 63 states. [2020-09-17 14:29:23,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:29:23,961 INFO L93 Difference]: Finished difference Result 30939 states and 43164 transitions. [2020-09-17 14:29:23,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-09-17 14:29:23,962 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-17 14:29:23,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:29:24,001 INFO L225 Difference]: With dead ends: 30939 [2020-09-17 14:29:24,001 INFO L226 Difference]: Without dead ends: 30937 [2020-09-17 14:29:24,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 40.7s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-09-17 14:29:24,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30937 states. [2020-09-17 14:29:24,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30937 to 2979. [2020-09-17 14:29:24,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2979 states. [2020-09-17 14:29:24,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2979 states to 2979 states and 3808 transitions. [2020-09-17 14:29:24,181 INFO L78 Accepts]: Start accepts. Automaton has 2979 states and 3808 transitions. Word has length 148 [2020-09-17 14:29:24,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:29:24,182 INFO L479 AbstractCegarLoop]: Abstraction has 2979 states and 3808 transitions. [2020-09-17 14:29:24,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-17 14:29:24,182 INFO L276 IsEmpty]: Start isEmpty. Operand 2979 states and 3808 transitions. [2020-09-17 14:29:24,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-17 14:29:24,187 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:29:24,188 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:29:24,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-17 14:29:24,401 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:29:24,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:29:24,402 INFO L82 PathProgramCache]: Analyzing trace with hash 769524141, now seen corresponding path program 36 times [2020-09-17 14:29:24,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:29:24,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823834405] [2020-09-17 14:29:24,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:29:24,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:29:28,734 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 14:29:28,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823834405] [2020-09-17 14:29:28,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778430939] [2020-09-17 14:29:28,735 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 14:29:29,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-09-17 14:29:29,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:29:29,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-17 14:29:29,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:29:29,548 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 14:29:29,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:29:29,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-17 14:29:29,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100075678] [2020-09-17 14:29:29,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-17 14:29:29,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:29:29,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-17 14:29:29,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 14:29:29,551 INFO L87 Difference]: Start difference. First operand 2979 states and 3808 transitions. Second operand 63 states. [2020-09-17 14:31:23,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:31:23,293 INFO L93 Difference]: Finished difference Result 30933 states and 43155 transitions. [2020-09-17 14:31:23,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-09-17 14:31:23,294 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-17 14:31:23,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:31:23,328 INFO L225 Difference]: With dead ends: 30933 [2020-09-17 14:31:23,328 INFO L226 Difference]: Without dead ends: 30931 [2020-09-17 14:31:23,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 44.4s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-09-17 14:31:23,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30931 states. [2020-09-17 14:31:23,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30931 to 2985. [2020-09-17 14:31:23,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2985 states. [2020-09-17 14:31:23,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2985 states to 2985 states and 3815 transitions. [2020-09-17 14:31:23,518 INFO L78 Accepts]: Start accepts. Automaton has 2985 states and 3815 transitions. Word has length 148 [2020-09-17 14:31:23,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:31:23,519 INFO L479 AbstractCegarLoop]: Abstraction has 2985 states and 3815 transitions. [2020-09-17 14:31:23,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-17 14:31:23,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2985 states and 3815 transitions. [2020-09-17 14:31:23,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-17 14:31:23,524 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:31:23,525 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:31:23,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-17 14:31:23,739 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:31:23,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:31:23,740 INFO L82 PathProgramCache]: Analyzing trace with hash -188999425, now seen corresponding path program 37 times [2020-09-17 14:31:23,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:31:23,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617372203] [2020-09-17 14:31:23,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:31:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:31:28,405 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 14:31:28,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617372203] [2020-09-17 14:31:28,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535134651] [2020-09-17 14:31:28,406 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 14:31:28,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:31:28,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-17 14:31:28,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:31:28,780 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 14:31:28,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:31:28,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-17 14:31:28,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17625698] [2020-09-17 14:31:28,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-17 14:31:28,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:31:28,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-17 14:31:28,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 14:31:28,783 INFO L87 Difference]: Start difference. First operand 2985 states and 3815 transitions. Second operand 63 states. [2020-09-17 14:31:55,993 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-09-17 14:32:51,967 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-09-17 14:33:33,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:33:33,190 INFO L93 Difference]: Finished difference Result 30927 states and 43146 transitions. [2020-09-17 14:33:33,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-09-17 14:33:33,193 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-17 14:33:33,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:33:33,224 INFO L225 Difference]: With dead ends: 30927 [2020-09-17 14:33:33,225 INFO L226 Difference]: Without dead ends: 30925 [2020-09-17 14:33:33,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 48.6s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-09-17 14:33:33,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30925 states. [2020-09-17 14:33:33,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30925 to 2991. [2020-09-17 14:33:33,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2991 states. [2020-09-17 14:33:33,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 3822 transitions. [2020-09-17 14:33:33,597 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 3822 transitions. Word has length 148 [2020-09-17 14:33:33,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:33:33,597 INFO L479 AbstractCegarLoop]: Abstraction has 2991 states and 3822 transitions. [2020-09-17 14:33:33,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-17 14:33:33,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 3822 transitions. [2020-09-17 14:33:33,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-17 14:33:33,602 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:33:33,602 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:33:33,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-17 14:33:33,803 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:33:33,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:33:33,804 INFO L82 PathProgramCache]: Analyzing trace with hash 48993005, now seen corresponding path program 38 times [2020-09-17 14:33:33,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:33:33,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580888525] [2020-09-17 14:33:33,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:33:33,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:33:39,059 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 14:33:39,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580888525] [2020-09-17 14:33:39,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237568853] [2020-09-17 14:33:39,060 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 14:33:39,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:33:39,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:33:39,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-17 14:33:39,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:33:39,499 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 14:33:39,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:33:39,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-17 14:33:39,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165869901] [2020-09-17 14:33:39,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-17 14:33:39,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:33:39,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-17 14:33:39,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 14:33:39,503 INFO L87 Difference]: Start difference. First operand 2991 states and 3822 transitions. Second operand 63 states.