/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/indexer.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c7e336b [2020-10-05 23:07:32,174 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-05 23:07:32,177 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-05 23:07:32,215 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-05 23:07:32,216 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-05 23:07:32,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-05 23:07:32,227 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-05 23:07:32,231 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-05 23:07:32,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-05 23:07:32,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-05 23:07:32,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-05 23:07:32,238 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-05 23:07:32,238 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-05 23:07:32,241 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-05 23:07:32,244 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-05 23:07:32,245 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-05 23:07:32,247 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-05 23:07:32,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-05 23:07:32,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-05 23:07:32,259 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-05 23:07:32,261 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-05 23:07:32,262 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-05 23:07:32,263 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-05 23:07:32,264 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-05 23:07:32,276 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-05 23:07:32,286 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-05 23:07:32,287 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-05 23:07:32,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-05 23:07:32,288 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-05 23:07:32,291 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-05 23:07:32,291 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-05 23:07:32,292 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-05 23:07:32,292 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-05 23:07:32,292 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-05 23:07:32,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-05 23:07:32,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-05 23:07:32,294 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 [2020-10-05 23:07:32,316 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-05 23:07:32,317 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-05 23:07:32,318 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-05 23:07:32,318 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-05 23:07:32,318 INFO L138 SettingsManager]: * Use SBE=true [2020-10-05 23:07:32,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-05 23:07:32,319 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-05 23:07:32,319 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-05 23:07:32,319 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-05 23:07:32,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-05 23:07:32,319 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-05 23:07:32,319 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-05 23:07:32,320 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-05 23:07:32,320 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-05 23:07:32,320 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-05 23:07:32,320 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-05 23:07:32,320 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-05 23:07:32,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-05 23:07:32,321 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-05 23:07:32,321 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-05 23:07:32,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-05 23:07:32,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-05 23:07:32,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-05 23:07:32,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-05 23:07:32,322 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-05 23:07:32,322 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-05 23:07:32,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-05 23:07:32,323 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-05 23:07:32,323 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-05 23:07:32,667 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-05 23:07:32,686 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-05 23:07:32,691 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-05 23:07:32,693 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-05 23:07:32,693 INFO L275 PluginConnector]: CDTParser initialized [2020-10-05 23:07:32,694 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/indexer.i [2020-10-05 23:07:32,768 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5fc8894c/573f57b9bef94c35a1a3b75102964f07/FLAGc86a136e9 [2020-10-05 23:07:33,317 INFO L306 CDTParser]: Found 1 translation units. [2020-10-05 23:07:33,318 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/indexer.i [2020-10-05 23:07:33,347 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5fc8894c/573f57b9bef94c35a1a3b75102964f07/FLAGc86a136e9 [2020-10-05 23:07:33,600 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5fc8894c/573f57b9bef94c35a1a3b75102964f07 [2020-10-05 23:07:33,610 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-05 23:07:33,612 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-05 23:07:33,617 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-05 23:07:33,617 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-05 23:07:33,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-05 23:07:33,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 11:07:33" (1/1) ... [2020-10-05 23:07:33,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16df8769 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:07:33, skipping insertion in model container [2020-10-05 23:07:33,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 11:07:33" (1/1) ... [2020-10-05 23:07:33,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-05 23:07:33,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-05 23:07:34,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-05 23:07:34,324 INFO L203 MainTranslator]: Completed pre-run [2020-10-05 23:07:34,382 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-05 23:07:34,520 INFO L208 MainTranslator]: Completed translation [2020-10-05 23:07:34,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:07:34 WrapperNode [2020-10-05 23:07:34,520 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-05 23:07:34,522 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-05 23:07:34,522 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-05 23:07:34,522 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-05 23:07:34,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:07:34" (1/1) ... [2020-10-05 23:07:34,563 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:07:34" (1/1) ... [2020-10-05 23:07:34,591 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-05 23:07:34,592 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-05 23:07:34,592 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-05 23:07:34,592 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-05 23:07:34,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:07:34" (1/1) ... [2020-10-05 23:07:34,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:07:34" (1/1) ... [2020-10-05 23:07:34,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:07:34" (1/1) ... [2020-10-05 23:07:34,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:07:34" (1/1) ... [2020-10-05 23:07:34,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:07:34" (1/1) ... [2020-10-05 23:07:34,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:07:34" (1/1) ... [2020-10-05 23:07:34,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:07:34" (1/1) ... [2020-10-05 23:07:34,626 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-05 23:07:34,626 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-05 23:07:34,627 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-05 23:07:34,627 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-05 23:07:34,628 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:07:34" (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 [2020-10-05 23:07:34,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-05 23:07:34,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-05 23:07:34,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-05 23:07:34,722 INFO L130 BoogieDeclarations]: Found specification of procedure thread_routine [2020-10-05 23:07:34,722 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_routine [2020-10-05 23:07:34,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-05 23:07:34,724 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-10-05 23:07:34,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-05 23:07:34,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-05 23:07:34,727 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-05 23:07:35,177 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-05 23:07:35,177 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-10-05 23:07:35,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 11:07:35 BoogieIcfgContainer [2020-10-05 23:07:35,180 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-05 23:07:35,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-05 23:07:35,182 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-05 23:07:35,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-05 23:07:35,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.10 11:07:33" (1/3) ... [2020-10-05 23:07:35,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75dd512c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 11:07:35, skipping insertion in model container [2020-10-05 23:07:35,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:07:34" (2/3) ... [2020-10-05 23:07:35,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75dd512c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 11:07:35, skipping insertion in model container [2020-10-05 23:07:35,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 11:07:35" (3/3) ... [2020-10-05 23:07:35,189 INFO L109 eAbstractionObserver]: Analyzing ICFG indexer.i [2020-10-05 23:07:35,201 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-05 23:07:35,202 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-05 23:07:35,209 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-05 23:07:35,211 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-05 23:07:35,246 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,247 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,247 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,247 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,248 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,248 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,248 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,248 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,249 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,249 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,249 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,249 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,250 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,250 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,250 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,250 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,251 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,251 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,251 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,252 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,252 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,252 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,252 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,253 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,253 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,253 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,253 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,253 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,254 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,254 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,255 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,255 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,255 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,255 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,255 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,256 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,256 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,256 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,257 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,257 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,257 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,257 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,257 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,258 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,258 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,258 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,258 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,258 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,259 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,259 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,259 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,259 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,260 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,260 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,260 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,260 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,261 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,261 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,261 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,262 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,262 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,262 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,262 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,262 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,263 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,263 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,263 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,263 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,264 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,264 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,264 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,264 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,265 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,265 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,265 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,266 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,266 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,266 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,266 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,267 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,267 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,267 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,267 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,268 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,268 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,268 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,268 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,273 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,273 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,273 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,274 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,274 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,274 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,274 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,275 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,275 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,275 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,275 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,276 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,276 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,276 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,276 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,277 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,277 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,297 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,297 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,297 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,297 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,297 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,298 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,298 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,300 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:35,329 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-05 23:07:35,352 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-05 23:07:35,353 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-05 23:07:35,353 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-05 23:07:35,353 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-05 23:07:35,353 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-05 23:07:35,353 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-05 23:07:35,353 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-05 23:07:35,354 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-05 23:07:35,371 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 94 places, 105 transitions, 218 flow [2020-10-05 23:07:35,374 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 94 places, 105 transitions, 218 flow [2020-10-05 23:07:35,436 INFO L129 PetriNetUnfolder]: 18/126 cut-off events. [2020-10-05 23:07:35,436 INFO L130 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2020-10-05 23:07:35,442 INFO L80 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 126 events. 18/126 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 204 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2020-10-05 23:07:35,447 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 94 places, 105 transitions, 218 flow [2020-10-05 23:07:35,493 INFO L129 PetriNetUnfolder]: 18/126 cut-off events. [2020-10-05 23:07:35,494 INFO L130 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2020-10-05 23:07:35,496 INFO L80 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 126 events. 18/126 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 204 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2020-10-05 23:07:35,500 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 2652 [2020-10-05 23:07:35,501 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-10-05 23:07:37,473 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-10-05 23:07:37,645 INFO L206 etLargeBlockEncoding]: Checked pairs total: 2011 [2020-10-05 23:07:37,645 INFO L214 etLargeBlockEncoding]: Total number of compositions: 90 [2020-10-05 23:07:37,649 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 25 transitions, 58 flow [2020-10-05 23:07:37,660 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 73 states. [2020-10-05 23:07:37,663 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2020-10-05 23:07:37,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-05 23:07:37,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:07:37,670 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:07:37,671 INFO L427 AbstractCegarLoop]: === Iteration 1 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:07:37,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:07:37,677 INFO L82 PathProgramCache]: Analyzing trace with hash -734709978, now seen corresponding path program 1 times [2020-10-05 23:07:37,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:07:37,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728910953] [2020-10-05 23:07:37,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:07:37,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:07:37,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:07:37,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728910953] [2020-10-05 23:07:37,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:07:37,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-05 23:07:37,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292240783] [2020-10-05 23:07:37,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-05 23:07:37,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:07:37,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-05 23:07:37,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:07:37,919 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 3 states. [2020-10-05 23:07:37,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:07:37,997 INFO L93 Difference]: Finished difference Result 61 states and 119 transitions. [2020-10-05 23:07:37,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-05 23:07:38,000 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-10-05 23:07:38,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:07:38,016 INFO L225 Difference]: With dead ends: 61 [2020-10-05 23:07:38,016 INFO L226 Difference]: Without dead ends: 53 [2020-10-05 23:07:38,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:07:38,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-05 23:07:38,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-05 23:07:38,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-05 23:07:38,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 108 transitions. [2020-10-05 23:07:38,057 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 108 transitions. Word has length 7 [2020-10-05 23:07:38,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:07:38,057 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 108 transitions. [2020-10-05 23:07:38,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-05 23:07:38,057 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 108 transitions. [2020-10-05 23:07:38,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-05 23:07:38,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:07:38,058 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:07:38,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-05 23:07:38,059 INFO L427 AbstractCegarLoop]: === Iteration 2 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:07:38,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:07:38,059 INFO L82 PathProgramCache]: Analyzing trace with hash 654852975, now seen corresponding path program 1 times [2020-10-05 23:07:38,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:07:38,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965117856] [2020-10-05 23:07:38,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:07:38,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:07:38,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:07:38,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965117856] [2020-10-05 23:07:38,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523378838] [2020-10-05 23:07:38,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-05 23:07:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:07:38,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-05 23:07:38,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:07:38,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:07:38,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:07:38,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-05 23:07:38,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955421080] [2020-10-05 23:07:38,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 23:07:38,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:07:38,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 23:07:38,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:07:38,266 INFO L87 Difference]: Start difference. First operand 53 states and 108 transitions. Second operand 6 states. [2020-10-05 23:07:38,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:07:38,309 INFO L93 Difference]: Finished difference Result 42 states and 81 transitions. [2020-10-05 23:07:38,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:07:38,311 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-10-05 23:07:38,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:07:38,312 INFO L225 Difference]: With dead ends: 42 [2020-10-05 23:07:38,312 INFO L226 Difference]: Without dead ends: 42 [2020-10-05 23:07:38,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:07:38,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-05 23:07:38,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-05 23:07:38,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-05 23:07:38,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 81 transitions. [2020-10-05 23:07:38,327 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 81 transitions. Word has length 8 [2020-10-05 23:07:38,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:07:38,328 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 81 transitions. [2020-10-05 23:07:38,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 23:07:38,328 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 81 transitions. [2020-10-05 23:07:38,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-05 23:07:38,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:07:38,330 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:07:38,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-05 23:07:38,546 INFO L427 AbstractCegarLoop]: === Iteration 3 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:07:38,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:07:38,548 INFO L82 PathProgramCache]: Analyzing trace with hash 781631558, now seen corresponding path program 2 times [2020-10-05 23:07:38,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:07:38,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917500972] [2020-10-05 23:07:38,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:07:38,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:07:38,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:07:38,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917500972] [2020-10-05 23:07:38,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762039583] [2020-10-05 23:07:38,658 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 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 [2020-10-05 23:07:38,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-05 23:07:38,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:07:38,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 23:07:38,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:07:38,804 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2020-10-05 23:07:38,807 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-05 23:07:38,835 INFO L625 ElimStorePlain]: treesize reduction 40, result has 24.5 percent of original size [2020-10-05 23:07:38,838 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-05 23:07:38,839 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:4 [2020-10-05 23:07:38,874 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-05 23:07:38,874 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-05 23:07:38,881 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-05 23:07:38,882 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-05 23:07:38,882 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-10-05 23:07:38,916 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2020-10-05 23:07:38,917 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-05 23:07:38,924 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-05 23:07:38,927 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-05 23:07:38,928 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:27 [2020-10-05 23:07:39,000 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2020-10-05 23:07:39,002 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-05 23:07:39,009 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-05 23:07:39,011 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-05 23:07:39,011 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:37, output treesize:7 [2020-10-05 23:07:39,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:07:39,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-05 23:07:39,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 10 [2020-10-05 23:07:39,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34332296] [2020-10-05 23:07:39,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 23:07:39,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:07:39,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 23:07:39,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-05 23:07:39,029 INFO L87 Difference]: Start difference. First operand 42 states and 81 transitions. Second operand 8 states. [2020-10-05 23:07:47,195 WARN L193 SmtUtils]: Spent 8.06 s on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2020-10-05 23:07:55,255 WARN L193 SmtUtils]: Spent 8.05 s on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-10-05 23:07:59,379 WARN L193 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-05 23:08:03,499 WARN L193 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 39 [2020-10-05 23:08:16,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:16,024 INFO L93 Difference]: Finished difference Result 103 states and 211 transitions. [2020-10-05 23:08:16,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 23:08:16,027 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2020-10-05 23:08:16,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:16,030 INFO L225 Difference]: With dead ends: 103 [2020-10-05 23:08:16,030 INFO L226 Difference]: Without dead ends: 103 [2020-10-05 23:08:16,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:08:16,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-05 23:08:16,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 52. [2020-10-05 23:08:16,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-05 23:08:16,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 106 transitions. [2020-10-05 23:08:16,041 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 106 transitions. Word has length 9 [2020-10-05 23:08:16,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:16,042 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 106 transitions. [2020-10-05 23:08:16,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 23:08:16,042 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 106 transitions. [2020-10-05 23:08:16,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 23:08:16,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:16,043 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:08:16,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:08:16,244 INFO L427 AbstractCegarLoop]: === Iteration 4 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:08:16,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:16,245 INFO L82 PathProgramCache]: Analyzing trace with hash -472215434, now seen corresponding path program 1 times [2020-10-05 23:08:16,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:16,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114520847] [2020-10-05 23:08:16,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:16,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-05 23:08:16,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114520847] [2020-10-05 23:08:16,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600337670] [2020-10-05 23:08:16,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-05 23:08:16,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:16,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-05 23:08:16,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:16,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-05 23:08:16,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:16,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-10-05 23:08:16,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091312582] [2020-10-05 23:08:16,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-05 23:08:16,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:16,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-05 23:08:16,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-05 23:08:16,402 INFO L87 Difference]: Start difference. First operand 52 states and 106 transitions. Second operand 7 states. [2020-10-05 23:08:16,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:16,424 INFO L93 Difference]: Finished difference Result 53 states and 107 transitions. [2020-10-05 23:08:16,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-05 23:08:16,425 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-05 23:08:16,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:16,426 INFO L225 Difference]: With dead ends: 53 [2020-10-05 23:08:16,426 INFO L226 Difference]: Without dead ends: 53 [2020-10-05 23:08:16,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-05 23:08:16,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-05 23:08:16,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-05 23:08:16,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-05 23:08:16,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 107 transitions. [2020-10-05 23:08:16,433 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 107 transitions. Word has length 11 [2020-10-05 23:08:16,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:16,433 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 107 transitions. [2020-10-05 23:08:16,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-05 23:08:16,433 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 107 transitions. [2020-10-05 23:08:16,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 23:08:16,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:16,434 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:08:16,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:08:16,648 INFO L427 AbstractCegarLoop]: === Iteration 5 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:08:16,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:16,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1112297535, now seen corresponding path program 2 times [2020-10-05 23:08:16,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:16,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956273636] [2020-10-05 23:08:16,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-05 23:08:16,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956273636] [2020-10-05 23:08:16,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567067380] [2020-10-05 23:08:16,733 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 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 [2020-10-05 23:08:16,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:08:16,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:08:16,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-05 23:08:16,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:16,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-05 23:08:16,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:16,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-10-05 23:08:16,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229881043] [2020-10-05 23:08:16,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 23:08:16,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:16,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 23:08:16,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:08:16,816 INFO L87 Difference]: Start difference. First operand 53 states and 107 transitions. Second operand 8 states. [2020-10-05 23:08:16,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:16,842 INFO L93 Difference]: Finished difference Result 54 states and 108 transitions. [2020-10-05 23:08:16,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-05 23:08:16,842 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-05 23:08:16,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:16,843 INFO L225 Difference]: With dead ends: 54 [2020-10-05 23:08:16,843 INFO L226 Difference]: Without dead ends: 54 [2020-10-05 23:08:16,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:08:16,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-05 23:08:16,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-05 23:08:16,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-05 23:08:16,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 108 transitions. [2020-10-05 23:08:16,850 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 108 transitions. Word has length 12 [2020-10-05 23:08:16,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:16,850 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 108 transitions. [2020-10-05 23:08:16,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 23:08:16,850 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 108 transitions. [2020-10-05 23:08:16,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 23:08:16,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:16,851 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:08:17,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:08:17,066 INFO L427 AbstractCegarLoop]: === Iteration 6 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:08:17,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:17,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1307407978, now seen corresponding path program 3 times [2020-10-05 23:08:17,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:17,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540170660] [2020-10-05 23:08:17,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:17,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:17,149 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-05 23:08:17,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540170660] [2020-10-05 23:08:17,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465569836] [2020-10-05 23:08:17,150 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 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 [2020-10-05 23:08:17,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 23:08:17,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:08:17,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 23:08:17,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:17,250 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-05 23:08:17,251 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-05 23:08:17,255 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-05 23:08:17,256 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-05 23:08:17,256 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2020-10-05 23:08:17,271 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-10-05 23:08:17,272 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-05 23:08:17,276 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-05 23:08:17,276 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-05 23:08:17,277 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:7 [2020-10-05 23:08:17,288 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-05 23:08:17,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-05 23:08:17,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2020-10-05 23:08:17,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066556507] [2020-10-05 23:08:17,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-05 23:08:17,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:17,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-05 23:08:17,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:08:17,291 INFO L87 Difference]: Start difference. First operand 54 states and 108 transitions. Second operand 7 states. [2020-10-05 23:08:17,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:17,497 INFO L93 Difference]: Finished difference Result 74 states and 150 transitions. [2020-10-05 23:08:17,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 23:08:17,504 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-10-05 23:08:17,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:17,505 INFO L225 Difference]: With dead ends: 74 [2020-10-05 23:08:17,505 INFO L226 Difference]: Without dead ends: 74 [2020-10-05 23:08:17,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-05 23:08:17,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-05 23:08:17,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 49. [2020-10-05 23:08:17,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-05 23:08:17,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 95 transitions. [2020-10-05 23:08:17,513 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 95 transitions. Word has length 13 [2020-10-05 23:08:17,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:17,513 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 95 transitions. [2020-10-05 23:08:17,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-05 23:08:17,514 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 95 transitions. [2020-10-05 23:08:17,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 23:08:17,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:17,514 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:08:17,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-05 23:08:17,728 INFO L427 AbstractCegarLoop]: === Iteration 7 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:08:17,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:17,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1307414801, now seen corresponding path program 1 times [2020-10-05 23:08:17,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:17,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641721864] [2020-10-05 23:08:17,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:17,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:17,774 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:17,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641721864] [2020-10-05 23:08:17,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605695269] [2020-10-05 23:08:17,775 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2020-10-05 23:08:17,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:17,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-05 23:08:17,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:17,853 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:17,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:17,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-10-05 23:08:17,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206824472] [2020-10-05 23:08:17,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 23:08:17,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:17,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 23:08:17,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=38, Unknown=0, NotChecked=0, Total=72 [2020-10-05 23:08:17,856 INFO L87 Difference]: Start difference. First operand 49 states and 95 transitions. Second operand 9 states. [2020-10-05 23:08:17,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:17,884 INFO L93 Difference]: Finished difference Result 50 states and 96 transitions. [2020-10-05 23:08:17,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 23:08:17,885 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-05 23:08:17,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:17,885 INFO L225 Difference]: With dead ends: 50 [2020-10-05 23:08:17,886 INFO L226 Difference]: Without dead ends: 50 [2020-10-05 23:08:17,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=38, Unknown=0, NotChecked=0, Total=72 [2020-10-05 23:08:17,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-05 23:08:17,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-05 23:08:17,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-05 23:08:17,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 96 transitions. [2020-10-05 23:08:17,890 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 96 transitions. Word has length 13 [2020-10-05 23:08:17,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:17,891 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 96 transitions. [2020-10-05 23:08:17,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 23:08:17,891 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 96 transitions. [2020-10-05 23:08:17,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 23:08:17,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:17,892 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:08:18,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:08:18,093 INFO L427 AbstractCegarLoop]: === Iteration 8 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:08:18,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:18,094 INFO L82 PathProgramCache]: Analyzing trace with hash 991125624, now seen corresponding path program 2 times [2020-10-05 23:08:18,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:18,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252454540] [2020-10-05 23:08:18,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:18,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:18,153 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:18,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252454540] [2020-10-05 23:08:18,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833996026] [2020-10-05 23:08:18,153 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 [2020-10-05 23:08:18,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:08:18,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:08:18,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 23:08:18,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:18,254 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:18,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:18,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-10-05 23:08:18,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502005096] [2020-10-05 23:08:18,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 23:08:18,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:18,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 23:08:18,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=47, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:08:18,257 INFO L87 Difference]: Start difference. First operand 50 states and 96 transitions. Second operand 10 states. [2020-10-05 23:08:18,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:18,292 INFO L93 Difference]: Finished difference Result 51 states and 97 transitions. [2020-10-05 23:08:18,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 23:08:18,293 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-05 23:08:18,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:18,293 INFO L225 Difference]: With dead ends: 51 [2020-10-05 23:08:18,293 INFO L226 Difference]: Without dead ends: 51 [2020-10-05 23:08:18,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=47, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:08:18,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-05 23:08:18,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-05 23:08:18,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-05 23:08:18,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 97 transitions. [2020-10-05 23:08:18,306 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 97 transitions. Word has length 14 [2020-10-05 23:08:18,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:18,307 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 97 transitions. [2020-10-05 23:08:18,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 23:08:18,307 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 97 transitions. [2020-10-05 23:08:18,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 23:08:18,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:18,309 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:08:18,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:08:18,522 INFO L427 AbstractCegarLoop]: === Iteration 9 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:08:18,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:18,522 INFO L82 PathProgramCache]: Analyzing trace with hash -768565233, now seen corresponding path program 3 times [2020-10-05 23:08:18,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:18,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578459124] [2020-10-05 23:08:18,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:18,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:18,582 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:18,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578459124] [2020-10-05 23:08:18,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039773713] [2020-10-05 23:08:18,583 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 [2020-10-05 23:08:18,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-05 23:08:18,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:08:18,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 23:08:18,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:18,682 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:18,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:18,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-10-05 23:08:18,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111986405] [2020-10-05 23:08:18,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 23:08:18,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:18,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 23:08:18,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=57, Unknown=0, NotChecked=0, Total=110 [2020-10-05 23:08:18,684 INFO L87 Difference]: Start difference. First operand 51 states and 97 transitions. Second operand 11 states. [2020-10-05 23:08:18,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:18,713 INFO L93 Difference]: Finished difference Result 52 states and 98 transitions. [2020-10-05 23:08:18,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-05 23:08:18,714 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-05 23:08:18,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:18,715 INFO L225 Difference]: With dead ends: 52 [2020-10-05 23:08:18,715 INFO L226 Difference]: Without dead ends: 52 [2020-10-05 23:08:18,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=57, Unknown=0, NotChecked=0, Total=110 [2020-10-05 23:08:18,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-05 23:08:18,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-05 23:08:18,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-05 23:08:18,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 98 transitions. [2020-10-05 23:08:18,719 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 98 transitions. Word has length 15 [2020-10-05 23:08:18,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:18,719 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 98 transitions. [2020-10-05 23:08:18,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 23:08:18,720 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 98 transitions. [2020-10-05 23:08:18,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 23:08:18,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:18,720 INFO L422 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:08:18,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-05 23:08:18,931 INFO L427 AbstractCegarLoop]: === Iteration 10 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:08:18,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:18,931 INFO L82 PathProgramCache]: Analyzing trace with hash 515593048, now seen corresponding path program 4 times [2020-10-05 23:08:18,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:18,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111073103] [2020-10-05 23:08:18,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:19,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111073103] [2020-10-05 23:08:19,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874843284] [2020-10-05 23:08:19,004 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 [2020-10-05 23:08:19,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:08:19,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:08:19,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 23:08:19,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:19,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:19,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-10-05 23:08:19,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240503007] [2020-10-05 23:08:19,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 23:08:19,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:19,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 23:08:19,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=68, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:08:19,086 INFO L87 Difference]: Start difference. First operand 52 states and 98 transitions. Second operand 12 states. [2020-10-05 23:08:19,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:19,122 INFO L93 Difference]: Finished difference Result 53 states and 99 transitions. [2020-10-05 23:08:19,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 23:08:19,123 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-05 23:08:19,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:19,124 INFO L225 Difference]: With dead ends: 53 [2020-10-05 23:08:19,124 INFO L226 Difference]: Without dead ends: 53 [2020-10-05 23:08:19,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=68, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:08:19,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-05 23:08:19,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-05 23:08:19,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-05 23:08:19,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 99 transitions. [2020-10-05 23:08:19,128 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 99 transitions. Word has length 16 [2020-10-05 23:08:19,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:19,129 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 99 transitions. [2020-10-05 23:08:19,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 23:08:19,129 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 99 transitions. [2020-10-05 23:08:19,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:08:19,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:19,130 INFO L422 BasicCegarLoop]: trace histogram [8, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:08:19,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:08:19,343 INFO L427 AbstractCegarLoop]: === Iteration 11 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:08:19,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:19,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1669794095, now seen corresponding path program 5 times [2020-10-05 23:08:19,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:19,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645908985] [2020-10-05 23:08:19,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:19,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:19,450 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:19,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645908985] [2020-10-05 23:08:19,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855660858] [2020-10-05 23:08:19,451 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 [2020-10-05 23:08:19,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-05 23:08:19,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:08:19,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 23:08:19,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:19,626 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:19,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:19,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-10-05 23:08:19,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539572763] [2020-10-05 23:08:19,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 23:08:19,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:19,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 23:08:19,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=80, Unknown=0, NotChecked=0, Total=156 [2020-10-05 23:08:19,629 INFO L87 Difference]: Start difference. First operand 53 states and 99 transitions. Second operand 13 states. [2020-10-05 23:08:19,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:19,660 INFO L93 Difference]: Finished difference Result 54 states and 100 transitions. [2020-10-05 23:08:19,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 23:08:19,661 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-05 23:08:19,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:19,661 INFO L225 Difference]: With dead ends: 54 [2020-10-05 23:08:19,661 INFO L226 Difference]: Without dead ends: 54 [2020-10-05 23:08:19,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=76, Invalid=80, Unknown=0, NotChecked=0, Total=156 [2020-10-05 23:08:19,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-05 23:08:19,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-05 23:08:19,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-05 23:08:19,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 100 transitions. [2020-10-05 23:08:19,666 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 100 transitions. Word has length 17 [2020-10-05 23:08:19,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:19,666 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 100 transitions. [2020-10-05 23:08:19,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 23:08:19,666 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 100 transitions. [2020-10-05 23:08:19,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 23:08:19,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:19,667 INFO L422 BasicCegarLoop]: trace histogram [9, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:08:19,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:08:19,869 INFO L427 AbstractCegarLoop]: === Iteration 12 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:08:19,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:19,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1204679112, now seen corresponding path program 6 times [2020-10-05 23:08:19,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:19,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784772314] [2020-10-05 23:08:19,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:19,963 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:19,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784772314] [2020-10-05 23:08:19,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925532062] [2020-10-05 23:08:19,964 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 [2020-10-05 23:08:20,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-05 23:08:20,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:08:20,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 23:08:20,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:20,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:20,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-10-05 23:08:20,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330583643] [2020-10-05 23:08:20,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 23:08:20,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:20,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 23:08:20,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=93, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:08:20,087 INFO L87 Difference]: Start difference. First operand 54 states and 100 transitions. Second operand 14 states. [2020-10-05 23:08:20,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:20,117 INFO L93 Difference]: Finished difference Result 55 states and 101 transitions. [2020-10-05 23:08:20,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 23:08:20,118 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-05 23:08:20,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:20,118 INFO L225 Difference]: With dead ends: 55 [2020-10-05 23:08:20,119 INFO L226 Difference]: Without dead ends: 55 [2020-10-05 23:08:20,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=89, Invalid=93, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:08:20,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-05 23:08:20,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-05 23:08:20,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-05 23:08:20,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 101 transitions. [2020-10-05 23:08:20,123 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 101 transitions. Word has length 18 [2020-10-05 23:08:20,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:20,123 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 101 transitions. [2020-10-05 23:08:20,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 23:08:20,123 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 101 transitions. [2020-10-05 23:08:20,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 23:08:20,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:20,124 INFO L422 BasicCegarLoop]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:08:20,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-05 23:08:20,334 INFO L427 AbstractCegarLoop]: === Iteration 13 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:08:20,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:20,334 INFO L82 PathProgramCache]: Analyzing trace with hash -119035313, now seen corresponding path program 7 times [2020-10-05 23:08:20,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:20,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002296255] [2020-10-05 23:08:20,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:20,442 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:20,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002296255] [2020-10-05 23:08:20,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978752258] [2020-10-05 23:08:20,443 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 [2020-10-05 23:08:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:20,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 23:08:20,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:20,533 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:20,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:20,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-10-05 23:08:20,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277766950] [2020-10-05 23:08:20,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 23:08:20,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:20,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 23:08:20,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=107, Unknown=0, NotChecked=0, Total=210 [2020-10-05 23:08:20,536 INFO L87 Difference]: Start difference. First operand 55 states and 101 transitions. Second operand 15 states. [2020-10-05 23:08:20,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:20,581 INFO L93 Difference]: Finished difference Result 56 states and 102 transitions. [2020-10-05 23:08:20,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 23:08:20,582 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-05 23:08:20,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:20,583 INFO L225 Difference]: With dead ends: 56 [2020-10-05 23:08:20,583 INFO L226 Difference]: Without dead ends: 56 [2020-10-05 23:08:20,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=103, Invalid=107, Unknown=0, NotChecked=0, Total=210 [2020-10-05 23:08:20,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-05 23:08:20,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-05 23:08:20,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-05 23:08:20,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 102 transitions. [2020-10-05 23:08:20,587 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 102 transitions. Word has length 19 [2020-10-05 23:08:20,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:20,587 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 102 transitions. [2020-10-05 23:08:20,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 23:08:20,588 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 102 transitions. [2020-10-05 23:08:20,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 23:08:20,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:20,588 INFO L422 BasicCegarLoop]: trace histogram [11, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:08:20,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-05 23:08:20,799 INFO L427 AbstractCegarLoop]: === Iteration 14 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:08:20,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:20,799 INFO L82 PathProgramCache]: Analyzing trace with hash -823815912, now seen corresponding path program 8 times [2020-10-05 23:08:20,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:20,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735389632] [2020-10-05 23:08:20,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:20,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:20,922 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:20,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735389632] [2020-10-05 23:08:20,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794791267] [2020-10-05 23:08:20,923 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 [2020-10-05 23:08:20,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:08:20,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:08:20,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 23:08:20,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:21,010 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:21,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:21,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-10-05 23:08:21,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755507165] [2020-10-05 23:08:21,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 23:08:21,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:21,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 23:08:21,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=122, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:08:21,012 INFO L87 Difference]: Start difference. First operand 56 states and 102 transitions. Second operand 16 states. [2020-10-05 23:08:21,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:21,043 INFO L93 Difference]: Finished difference Result 57 states and 103 transitions. [2020-10-05 23:08:21,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 23:08:21,044 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-05 23:08:21,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:21,045 INFO L225 Difference]: With dead ends: 57 [2020-10-05 23:08:21,045 INFO L226 Difference]: Without dead ends: 57 [2020-10-05 23:08:21,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=122, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:08:21,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-05 23:08:21,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-05 23:08:21,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-05 23:08:21,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 103 transitions. [2020-10-05 23:08:21,049 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 103 transitions. Word has length 20 [2020-10-05 23:08:21,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:21,049 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 103 transitions. [2020-10-05 23:08:21,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 23:08:21,049 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 103 transitions. [2020-10-05 23:08:21,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 23:08:21,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:21,050 INFO L422 BasicCegarLoop]: trace histogram [12, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:08:21,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-05 23:08:21,261 INFO L427 AbstractCegarLoop]: === Iteration 15 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:08:21,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:21,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1197178001, now seen corresponding path program 9 times [2020-10-05 23:08:21,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:21,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161790245] [2020-10-05 23:08:21,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:21,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:21,395 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:21,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161790245] [2020-10-05 23:08:21,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449606703] [2020-10-05 23:08:21,396 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 [2020-10-05 23:08:21,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-05 23:08:21,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:08:21,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 23:08:21,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:21,584 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:21,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:21,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2020-10-05 23:08:21,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768724632] [2020-10-05 23:08:21,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 23:08:21,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:21,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 23:08:21,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=138, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:08:21,586 INFO L87 Difference]: Start difference. First operand 57 states and 103 transitions. Second operand 17 states. [2020-10-05 23:08:21,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:21,617 INFO L93 Difference]: Finished difference Result 58 states and 104 transitions. [2020-10-05 23:08:21,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 23:08:21,617 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-05 23:08:21,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:21,618 INFO L225 Difference]: With dead ends: 58 [2020-10-05 23:08:21,618 INFO L226 Difference]: Without dead ends: 58 [2020-10-05 23:08:21,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=134, Invalid=138, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:08:21,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-05 23:08:21,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-05 23:08:21,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-05 23:08:21,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 104 transitions. [2020-10-05 23:08:21,621 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 104 transitions. Word has length 21 [2020-10-05 23:08:21,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:21,622 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 104 transitions. [2020-10-05 23:08:21,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 23:08:21,622 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 104 transitions. [2020-10-05 23:08:21,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 23:08:21,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:21,623 INFO L422 BasicCegarLoop]: trace histogram [13, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:08:21,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:08:21,823 INFO L427 AbstractCegarLoop]: === Iteration 16 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:08:21,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:21,824 INFO L82 PathProgramCache]: Analyzing trace with hash 113499128, now seen corresponding path program 10 times [2020-10-05 23:08:21,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:21,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034618205] [2020-10-05 23:08:21,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:21,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:21,968 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:21,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034618205] [2020-10-05 23:08:21,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333600596] [2020-10-05 23:08:21,969 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 [2020-10-05 23:08:22,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:08:22,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:08:22,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 23:08:22,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:22,066 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:22,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:22,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-10-05 23:08:22,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295232733] [2020-10-05 23:08:22,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 23:08:22,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:22,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 23:08:22,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=155, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:08:22,068 INFO L87 Difference]: Start difference. First operand 58 states and 104 transitions. Second operand 18 states. [2020-10-05 23:08:22,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:22,108 INFO L93 Difference]: Finished difference Result 59 states and 105 transitions. [2020-10-05 23:08:22,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 23:08:22,109 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-05 23:08:22,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:22,110 INFO L225 Difference]: With dead ends: 59 [2020-10-05 23:08:22,110 INFO L226 Difference]: Without dead ends: 59 [2020-10-05 23:08:22,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=155, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:08:22,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-05 23:08:22,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-05 23:08:22,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-05 23:08:22,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 105 transitions. [2020-10-05 23:08:22,114 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 105 transitions. Word has length 22 [2020-10-05 23:08:22,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:22,114 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 105 transitions. [2020-10-05 23:08:22,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 23:08:22,115 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 105 transitions. [2020-10-05 23:08:22,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:08:22,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:22,116 INFO L422 BasicCegarLoop]: trace histogram [14, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:08:22,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-05 23:08:22,325 INFO L427 AbstractCegarLoop]: === Iteration 17 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:08:22,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:22,326 INFO L82 PathProgramCache]: Analyzing trace with hash 2089784463, now seen corresponding path program 11 times [2020-10-05 23:08:22,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:22,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369450441] [2020-10-05 23:08:22,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:22,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:22,497 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:22,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369450441] [2020-10-05 23:08:22,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105919593] [2020-10-05 23:08:22,498 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 [2020-10-05 23:08:22,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-05 23:08:22,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:08:22,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 23:08:22,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:22,694 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:22,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:22,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-10-05 23:08:22,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053602603] [2020-10-05 23:08:22,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:08:22,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:22,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:08:22,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=173, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:08:22,696 INFO L87 Difference]: Start difference. First operand 59 states and 105 transitions. Second operand 19 states. [2020-10-05 23:08:22,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:22,739 INFO L93 Difference]: Finished difference Result 60 states and 106 transitions. [2020-10-05 23:08:22,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 23:08:22,739 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-05 23:08:22,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:22,740 INFO L225 Difference]: With dead ends: 60 [2020-10-05 23:08:22,740 INFO L226 Difference]: Without dead ends: 60 [2020-10-05 23:08:22,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=169, Invalid=173, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:08:22,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-05 23:08:22,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-05 23:08:22,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-05 23:08:22,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 106 transitions. [2020-10-05 23:08:22,744 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 106 transitions. Word has length 23 [2020-10-05 23:08:22,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:22,745 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 106 transitions. [2020-10-05 23:08:22,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:08:22,745 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 106 transitions. [2020-10-05 23:08:22,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:08:22,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:22,746 INFO L422 BasicCegarLoop]: trace histogram [15, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:08:22,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-05 23:08:22,959 INFO L427 AbstractCegarLoop]: === Iteration 18 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:08:22,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:22,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1069879592, now seen corresponding path program 12 times [2020-10-05 23:08:22,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:22,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419631723] [2020-10-05 23:08:22,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:23,138 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:23,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419631723] [2020-10-05 23:08:23,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396154268] [2020-10-05 23:08:23,141 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 [2020-10-05 23:08:23,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-05 23:08:23,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:08:23,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 23:08:23,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:23,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:23,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-10-05 23:08:23,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868420119] [2020-10-05 23:08:23,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:08:23,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:23,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:08:23,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=192, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:08:23,502 INFO L87 Difference]: Start difference. First operand 60 states and 106 transitions. Second operand 20 states. [2020-10-05 23:08:23,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:23,544 INFO L93 Difference]: Finished difference Result 61 states and 107 transitions. [2020-10-05 23:08:23,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 23:08:23,545 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-05 23:08:23,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:23,545 INFO L225 Difference]: With dead ends: 61 [2020-10-05 23:08:23,546 INFO L226 Difference]: Without dead ends: 61 [2020-10-05 23:08:23,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=188, Invalid=192, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:08:23,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-05 23:08:23,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-05 23:08:23,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-05 23:08:23,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 107 transitions. [2020-10-05 23:08:23,549 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 107 transitions. Word has length 24 [2020-10-05 23:08:23,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:23,549 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 107 transitions. [2020-10-05 23:08:23,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:08:23,549 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 107 transitions. [2020-10-05 23:08:23,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:08:23,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:23,550 INFO L422 BasicCegarLoop]: trace histogram [16, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:08:23,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-05 23:08:23,751 INFO L427 AbstractCegarLoop]: === Iteration 19 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:08:23,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:23,752 INFO L82 PathProgramCache]: Analyzing trace with hash -235217489, now seen corresponding path program 13 times [2020-10-05 23:08:23,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:23,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220780054] [2020-10-05 23:08:23,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:23,953 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:23,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220780054] [2020-10-05 23:08:23,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429006089] [2020-10-05 23:08:23,954 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 [2020-10-05 23:08:24,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:24,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 23:08:24,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:24,044 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:24,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:24,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-10-05 23:08:24,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36131622] [2020-10-05 23:08:24,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:08:24,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:24,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:08:24,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=212, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:08:24,046 INFO L87 Difference]: Start difference. First operand 61 states and 107 transitions. Second operand 21 states. [2020-10-05 23:08:24,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:24,090 INFO L93 Difference]: Finished difference Result 62 states and 108 transitions. [2020-10-05 23:08:24,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 23:08:24,090 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-05 23:08:24,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:24,091 INFO L225 Difference]: With dead ends: 62 [2020-10-05 23:08:24,091 INFO L226 Difference]: Without dead ends: 62 [2020-10-05 23:08:24,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=208, Invalid=212, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:08:24,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-05 23:08:24,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-05 23:08:24,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-05 23:08:24,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 108 transitions. [2020-10-05 23:08:24,094 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 108 transitions. Word has length 25 [2020-10-05 23:08:24,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:24,095 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 108 transitions. [2020-10-05 23:08:24,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:08:24,095 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 108 transitions. [2020-10-05 23:08:24,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:08:24,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:24,096 INFO L422 BasicCegarLoop]: trace histogram [17, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:08:24,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:08:24,304 INFO L427 AbstractCegarLoop]: === Iteration 20 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:08:24,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:24,304 INFO L82 PathProgramCache]: Analyzing trace with hash -130496072, now seen corresponding path program 14 times [2020-10-05 23:08:24,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:24,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52126288] [2020-10-05 23:08:24,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:24,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:24,523 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:24,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52126288] [2020-10-05 23:08:24,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433787713] [2020-10-05 23:08:24,524 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 [2020-10-05 23:08:24,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:08:24,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:08:24,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:08:24,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:24,609 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:24,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:24,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-05 23:08:24,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297073782] [2020-10-05 23:08:24,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:08:24,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:24,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:08:24,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=233, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:08:24,611 INFO L87 Difference]: Start difference. First operand 62 states and 108 transitions. Second operand 22 states. [2020-10-05 23:08:24,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:24,651 INFO L93 Difference]: Finished difference Result 63 states and 109 transitions. [2020-10-05 23:08:24,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 23:08:24,652 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-05 23:08:24,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:24,652 INFO L225 Difference]: With dead ends: 63 [2020-10-05 23:08:24,653 INFO L226 Difference]: Without dead ends: 63 [2020-10-05 23:08:24,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=229, Invalid=233, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:08:24,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-05 23:08:24,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-05 23:08:24,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-05 23:08:24,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 109 transitions. [2020-10-05 23:08:24,656 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 109 transitions. Word has length 26 [2020-10-05 23:08:24,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:24,656 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 109 transitions. [2020-10-05 23:08:24,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:08:24,656 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 109 transitions. [2020-10-05 23:08:24,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:08:24,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:24,657 INFO L422 BasicCegarLoop]: trace histogram [18, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:08:24,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:08:24,858 INFO L427 AbstractCegarLoop]: === Iteration 21 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:08:24,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:24,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1179099441, now seen corresponding path program 15 times [2020-10-05 23:08:24,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:24,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276978912] [2020-10-05 23:08:24,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:24,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:25,098 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:25,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276978912] [2020-10-05 23:08:25,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585902571] [2020-10-05 23:08:25,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:08:26,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-05 23:08:26,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:08:26,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:08:26,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:26,057 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:26,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:26,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-10-05 23:08:26,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360872822] [2020-10-05 23:08:26,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:08:26,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:26,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:08:26,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=255, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:08:26,059 INFO L87 Difference]: Start difference. First operand 63 states and 109 transitions. Second operand 23 states. [2020-10-05 23:08:26,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:26,118 INFO L93 Difference]: Finished difference Result 64 states and 110 transitions. [2020-10-05 23:08:26,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 23:08:26,118 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-05 23:08:26,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:26,119 INFO L225 Difference]: With dead ends: 64 [2020-10-05 23:08:26,119 INFO L226 Difference]: Without dead ends: 64 [2020-10-05 23:08:26,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=251, Invalid=255, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:08:26,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-05 23:08:26,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-05 23:08:26,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-05 23:08:26,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 110 transitions. [2020-10-05 23:08:26,122 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 110 transitions. Word has length 27 [2020-10-05 23:08:26,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:26,122 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 110 transitions. [2020-10-05 23:08:26,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:08:26,123 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 110 transitions. [2020-10-05 23:08:26,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-05 23:08:26,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:26,123 INFO L422 BasicCegarLoop]: trace histogram [19, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:08:26,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-05 23:08:26,332 INFO L427 AbstractCegarLoop]: === Iteration 22 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:08:26,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:26,332 INFO L82 PathProgramCache]: Analyzing trace with hash 673934488, now seen corresponding path program 16 times [2020-10-05 23:08:26,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:26,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249891704] [2020-10-05 23:08:26,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:26,593 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:26,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249891704] [2020-10-05 23:08:26,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135731379] [2020-10-05 23:08:26,594 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 [2020-10-05 23:08:26,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:08:26,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:08:26,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:08:26,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:26,690 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:26,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:26,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-10-05 23:08:26,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700726158] [2020-10-05 23:08:26,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 23:08:26,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:26,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 23:08:26,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=278, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:08:26,694 INFO L87 Difference]: Start difference. First operand 64 states and 110 transitions. Second operand 24 states. [2020-10-05 23:08:26,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:26,737 INFO L93 Difference]: Finished difference Result 65 states and 111 transitions. [2020-10-05 23:08:26,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 23:08:26,738 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-05 23:08:26,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:26,739 INFO L225 Difference]: With dead ends: 65 [2020-10-05 23:08:26,739 INFO L226 Difference]: Without dead ends: 65 [2020-10-05 23:08:26,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=274, Invalid=278, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:08:26,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-05 23:08:26,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-05 23:08:26,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-05 23:08:26,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 111 transitions. [2020-10-05 23:08:26,743 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 111 transitions. Word has length 28 [2020-10-05 23:08:26,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:26,743 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 111 transitions. [2020-10-05 23:08:26,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 23:08:26,743 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 111 transitions. [2020-10-05 23:08:26,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-05 23:08:26,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:26,744 INFO L422 BasicCegarLoop]: trace histogram [20, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:08:26,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-05 23:08:26,950 INFO L427 AbstractCegarLoop]: === Iteration 23 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:08:26,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:26,950 INFO L82 PathProgramCache]: Analyzing trace with hash -2011555857, now seen corresponding path program 17 times [2020-10-05 23:08:26,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:26,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461000497] [2020-10-05 23:08:26,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:26,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:27,253 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:27,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461000497] [2020-10-05 23:08:27,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286795766] [2020-10-05 23:08:27,254 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 [2020-10-05 23:08:27,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-05 23:08:27,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:08:27,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:08:27,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:27,625 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:27,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:27,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2020-10-05 23:08:27,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034694595] [2020-10-05 23:08:27,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-05 23:08:27,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:27,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-05 23:08:27,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=302, Unknown=0, NotChecked=0, Total=600 [2020-10-05 23:08:27,627 INFO L87 Difference]: Start difference. First operand 65 states and 111 transitions. Second operand 25 states. [2020-10-05 23:08:27,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:27,666 INFO L93 Difference]: Finished difference Result 66 states and 112 transitions. [2020-10-05 23:08:27,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 23:08:27,667 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-05 23:08:27,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:27,667 INFO L225 Difference]: With dead ends: 66 [2020-10-05 23:08:27,667 INFO L226 Difference]: Without dead ends: 66 [2020-10-05 23:08:27,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=298, Invalid=302, Unknown=0, NotChecked=0, Total=600 [2020-10-05 23:08:27,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-05 23:08:27,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-05 23:08:27,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-05 23:08:27,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 112 transitions. [2020-10-05 23:08:27,670 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 112 transitions. Word has length 29 [2020-10-05 23:08:27,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:27,671 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 112 transitions. [2020-10-05 23:08:27,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-05 23:08:27,671 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 112 transitions. [2020-10-05 23:08:27,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-05 23:08:27,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:27,671 INFO L422 BasicCegarLoop]: trace histogram [21, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:08:27,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:08:27,881 INFO L427 AbstractCegarLoop]: === Iteration 24 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:08:27,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:27,881 INFO L82 PathProgramCache]: Analyzing trace with hash 637589368, now seen corresponding path program 18 times [2020-10-05 23:08:27,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:27,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121654070] [2020-10-05 23:08:27,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:27,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:28,227 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:28,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121654070] [2020-10-05 23:08:28,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634539356] [2020-10-05 23:08:28,227 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 [2020-10-05 23:08:29,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-05 23:08:29,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:08:29,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:08:29,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:29,612 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:29,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:29,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2020-10-05 23:08:29,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064620568] [2020-10-05 23:08:29,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-05 23:08:29,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:29,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-05 23:08:29,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=327, Unknown=0, NotChecked=0, Total=650 [2020-10-05 23:08:29,614 INFO L87 Difference]: Start difference. First operand 66 states and 112 transitions. Second operand 26 states. [2020-10-05 23:08:29,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:29,653 INFO L93 Difference]: Finished difference Result 67 states and 113 transitions. [2020-10-05 23:08:29,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 23:08:29,653 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-05 23:08:29,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:29,654 INFO L225 Difference]: With dead ends: 67 [2020-10-05 23:08:29,654 INFO L226 Difference]: Without dead ends: 67 [2020-10-05 23:08:29,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=323, Invalid=327, Unknown=0, NotChecked=0, Total=650 [2020-10-05 23:08:29,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-05 23:08:29,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-05 23:08:29,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-05 23:08:29,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 113 transitions. [2020-10-05 23:08:29,658 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 113 transitions. Word has length 30 [2020-10-05 23:08:29,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:29,658 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 113 transitions. [2020-10-05 23:08:29,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-05 23:08:29,659 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 113 transitions. [2020-10-05 23:08:29,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-05 23:08:29,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:29,659 INFO L422 BasicCegarLoop]: trace histogram [22, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:08:29,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-05 23:08:29,870 INFO L427 AbstractCegarLoop]: === Iteration 25 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:08:29,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:29,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1156712719, now seen corresponding path program 19 times [2020-10-05 23:08:29,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:29,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82322892] [2020-10-05 23:08:29,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:29,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:30,188 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:30,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82322892] [2020-10-05 23:08:30,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182747273] [2020-10-05 23:08:30,189 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 [2020-10-05 23:08:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:30,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-05 23:08:30,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:30,279 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:30,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:30,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-10-05 23:08:30,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749700552] [2020-10-05 23:08:30,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-05 23:08:30,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:30,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-05 23:08:30,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=353, Unknown=0, NotChecked=0, Total=702 [2020-10-05 23:08:30,281 INFO L87 Difference]: Start difference. First operand 67 states and 113 transitions. Second operand 27 states. [2020-10-05 23:08:30,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:30,322 INFO L93 Difference]: Finished difference Result 68 states and 114 transitions. [2020-10-05 23:08:30,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 23:08:30,323 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-05 23:08:30,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:30,324 INFO L225 Difference]: With dead ends: 68 [2020-10-05 23:08:30,324 INFO L226 Difference]: Without dead ends: 68 [2020-10-05 23:08:30,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=349, Invalid=353, Unknown=0, NotChecked=0, Total=702 [2020-10-05 23:08:30,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-05 23:08:30,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-05 23:08:30,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-05 23:08:30,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 114 transitions. [2020-10-05 23:08:30,326 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 114 transitions. Word has length 31 [2020-10-05 23:08:30,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:30,327 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 114 transitions. [2020-10-05 23:08:30,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-05 23:08:30,327 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 114 transitions. [2020-10-05 23:08:30,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-05 23:08:30,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:30,327 INFO L422 BasicCegarLoop]: trace histogram [23, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:08:30,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:08:30,538 INFO L427 AbstractCegarLoop]: === Iteration 26 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:08:30,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:30,539 INFO L82 PathProgramCache]: Analyzing trace with hash 69667416, now seen corresponding path program 20 times [2020-10-05 23:08:30,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:30,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935849284] [2020-10-05 23:08:30,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:30,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:30,893 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:30,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935849284] [2020-10-05 23:08:30,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337281349] [2020-10-05 23:08:30,894 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 [2020-10-05 23:08:30,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:08:30,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:08:30,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-05 23:08:30,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:31,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:31,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2020-10-05 23:08:31,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645898761] [2020-10-05 23:08:31,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-05 23:08:31,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:31,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-05 23:08:31,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=380, Unknown=0, NotChecked=0, Total=756 [2020-10-05 23:08:31,064 INFO L87 Difference]: Start difference. First operand 68 states and 114 transitions. Second operand 28 states. [2020-10-05 23:08:31,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:31,124 INFO L93 Difference]: Finished difference Result 69 states and 115 transitions. [2020-10-05 23:08:31,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-05 23:08:31,125 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-05 23:08:31,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:31,126 INFO L225 Difference]: With dead ends: 69 [2020-10-05 23:08:31,126 INFO L226 Difference]: Without dead ends: 69 [2020-10-05 23:08:31,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=376, Invalid=380, Unknown=0, NotChecked=0, Total=756 [2020-10-05 23:08:31,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-05 23:08:31,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-05 23:08:31,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-05 23:08:31,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 115 transitions. [2020-10-05 23:08:31,130 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 115 transitions. Word has length 32 [2020-10-05 23:08:31,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:31,131 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 115 transitions. [2020-10-05 23:08:31,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-05 23:08:31,131 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 115 transitions. [2020-10-05 23:08:31,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-05 23:08:31,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:31,133 INFO L422 BasicCegarLoop]: trace histogram [24, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:08:31,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-05 23:08:31,346 INFO L427 AbstractCegarLoop]: === Iteration 27 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:08:31,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:31,346 INFO L82 PathProgramCache]: Analyzing trace with hash 731001391, now seen corresponding path program 21 times [2020-10-05 23:08:31,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:31,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533857369] [2020-10-05 23:08:31,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:31,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:31,743 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:31,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533857369] [2020-10-05 23:08:31,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15306869] [2020-10-05 23:08:31,743 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 [2020-10-05 23:08:32,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-05 23:08:32,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:08:32,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-05 23:08:32,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:32,293 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:32,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:32,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-10-05 23:08:32,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639105518] [2020-10-05 23:08:32,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-05 23:08:32,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:32,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-05 23:08:32,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=408, Unknown=0, NotChecked=0, Total=812 [2020-10-05 23:08:32,295 INFO L87 Difference]: Start difference. First operand 69 states and 115 transitions. Second operand 29 states. [2020-10-05 23:08:32,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:32,337 INFO L93 Difference]: Finished difference Result 70 states and 116 transitions. [2020-10-05 23:08:32,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 23:08:32,338 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-05 23:08:32,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:32,338 INFO L225 Difference]: With dead ends: 70 [2020-10-05 23:08:32,338 INFO L226 Difference]: Without dead ends: 70 [2020-10-05 23:08:32,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=404, Invalid=408, Unknown=0, NotChecked=0, Total=812 [2020-10-05 23:08:32,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-05 23:08:32,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-05 23:08:32,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-05 23:08:32,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 116 transitions. [2020-10-05 23:08:32,342 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 116 transitions. Word has length 33 [2020-10-05 23:08:32,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:32,342 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 116 transitions. [2020-10-05 23:08:32,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-05 23:08:32,342 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 116 transitions. [2020-10-05 23:08:32,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-05 23:08:32,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:32,343 INFO L422 BasicCegarLoop]: trace histogram [25, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:08:32,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-05 23:08:32,552 INFO L427 AbstractCegarLoop]: === Iteration 28 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:08:32,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:32,552 INFO L82 PathProgramCache]: Analyzing trace with hash -242481864, now seen corresponding path program 22 times [2020-10-05 23:08:32,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:32,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354562726] [2020-10-05 23:08:32,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:33,100 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:33,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354562726] [2020-10-05 23:08:33,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165454724] [2020-10-05 23:08:33,101 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 [2020-10-05 23:08:33,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:08:33,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:08:33,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-05 23:08:33,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:33,239 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:33,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:33,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2020-10-05 23:08:33,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308404966] [2020-10-05 23:08:33,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-05 23:08:33,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:33,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-05 23:08:33,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=437, Unknown=0, NotChecked=0, Total=870 [2020-10-05 23:08:33,242 INFO L87 Difference]: Start difference. First operand 70 states and 116 transitions. Second operand 30 states. [2020-10-05 23:08:33,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:33,298 INFO L93 Difference]: Finished difference Result 71 states and 117 transitions. [2020-10-05 23:08:33,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 23:08:33,298 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-05 23:08:33,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:33,299 INFO L225 Difference]: With dead ends: 71 [2020-10-05 23:08:33,299 INFO L226 Difference]: Without dead ends: 71 [2020-10-05 23:08:33,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=433, Invalid=437, Unknown=0, NotChecked=0, Total=870 [2020-10-05 23:08:33,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-05 23:08:33,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-05 23:08:33,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-05 23:08:33,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 117 transitions. [2020-10-05 23:08:33,304 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 117 transitions. Word has length 34 [2020-10-05 23:08:33,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:33,304 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 117 transitions. [2020-10-05 23:08:33,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-05 23:08:33,305 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 117 transitions. [2020-10-05 23:08:33,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-05 23:08:33,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:33,306 INFO L422 BasicCegarLoop]: trace histogram [26, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:08:33,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-05 23:08:33,518 INFO L427 AbstractCegarLoop]: === Iteration 29 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:08:33,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:33,519 INFO L82 PathProgramCache]: Analyzing trace with hash -355691697, now seen corresponding path program 23 times [2020-10-05 23:08:33,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:33,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378980843] [2020-10-05 23:08:33,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:33,987 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:33,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378980843] [2020-10-05 23:08:33,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157889849] [2020-10-05 23:08:33,990 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 [2020-10-05 23:08:34,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-10-05 23:08:34,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:08:34,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-05 23:08:34,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:34,450 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:34,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:34,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2020-10-05 23:08:34,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443396977] [2020-10-05 23:08:34,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-05 23:08:34,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:34,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-05 23:08:34,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=467, Unknown=0, NotChecked=0, Total=930 [2020-10-05 23:08:34,452 INFO L87 Difference]: Start difference. First operand 71 states and 117 transitions. Second operand 31 states. [2020-10-05 23:08:34,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:34,505 INFO L93 Difference]: Finished difference Result 72 states and 118 transitions. [2020-10-05 23:08:34,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-05 23:08:34,505 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-05 23:08:34,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:34,506 INFO L225 Difference]: With dead ends: 72 [2020-10-05 23:08:34,506 INFO L226 Difference]: Without dead ends: 72 [2020-10-05 23:08:34,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=463, Invalid=467, Unknown=0, NotChecked=0, Total=930 [2020-10-05 23:08:34,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-05 23:08:34,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-05 23:08:34,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-05 23:08:34,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 118 transitions. [2020-10-05 23:08:34,511 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 118 transitions. Word has length 35 [2020-10-05 23:08:34,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:34,511 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 118 transitions. [2020-10-05 23:08:34,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-05 23:08:34,511 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 118 transitions. [2020-10-05 23:08:34,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-05 23:08:34,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:34,512 INFO L422 BasicCegarLoop]: trace histogram [27, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:08:34,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-05 23:08:34,721 INFO L427 AbstractCegarLoop]: === Iteration 30 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:08:34,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:34,721 INFO L82 PathProgramCache]: Analyzing trace with hash 429770776, now seen corresponding path program 24 times [2020-10-05 23:08:34,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:34,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788233019] [2020-10-05 23:08:34,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:35,192 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:35,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788233019] [2020-10-05 23:08:35,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222497956] [2020-10-05 23:08:35,193 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 [2020-10-05 23:08:40,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-10-05 23:08:40,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:08:40,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-05 23:08:40,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:40,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:40,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2020-10-05 23:08:40,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362953050] [2020-10-05 23:08:40,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-05 23:08:40,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:40,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-05 23:08:40,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=498, Unknown=0, NotChecked=0, Total=992 [2020-10-05 23:08:40,348 INFO L87 Difference]: Start difference. First operand 72 states and 118 transitions. Second operand 32 states. [2020-10-05 23:08:40,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:40,399 INFO L93 Difference]: Finished difference Result 73 states and 119 transitions. [2020-10-05 23:08:40,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-05 23:08:40,399 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 36 [2020-10-05 23:08:40,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:40,400 INFO L225 Difference]: With dead ends: 73 [2020-10-05 23:08:40,400 INFO L226 Difference]: Without dead ends: 73 [2020-10-05 23:08:40,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=494, Invalid=498, Unknown=0, NotChecked=0, Total=992 [2020-10-05 23:08:40,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-05 23:08:40,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-05 23:08:40,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-05 23:08:40,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 119 transitions. [2020-10-05 23:08:40,404 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 119 transitions. Word has length 36 [2020-10-05 23:08:40,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:40,404 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 119 transitions. [2020-10-05 23:08:40,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-05 23:08:40,405 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 119 transitions. [2020-10-05 23:08:40,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-05 23:08:40,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:40,405 INFO L422 BasicCegarLoop]: trace histogram [28, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:08:40,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:08:40,610 INFO L427 AbstractCegarLoop]: === Iteration 31 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:08:40,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:40,610 INFO L82 PathProgramCache]: Analyzing trace with hash -990696337, now seen corresponding path program 25 times [2020-10-05 23:08:40,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:40,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195176446] [2020-10-05 23:08:40,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:41,128 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:41,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195176446] [2020-10-05 23:08:41,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610269614] [2020-10-05 23:08:41,128 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 [2020-10-05 23:08:41,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:41,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-05 23:08:41,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:41,220 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:41,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:41,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 32 [2020-10-05 23:08:41,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601896878] [2020-10-05 23:08:41,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-05 23:08:41,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:41,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-05 23:08:41,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=530, Unknown=0, NotChecked=0, Total=1056 [2020-10-05 23:08:41,222 INFO L87 Difference]: Start difference. First operand 73 states and 119 transitions. Second operand 33 states. [2020-10-05 23:08:41,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:41,268 INFO L93 Difference]: Finished difference Result 74 states and 120 transitions. [2020-10-05 23:08:41,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-05 23:08:41,268 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 37 [2020-10-05 23:08:41,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:41,269 INFO L225 Difference]: With dead ends: 74 [2020-10-05 23:08:41,269 INFO L226 Difference]: Without dead ends: 74 [2020-10-05 23:08:41,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=526, Invalid=530, Unknown=0, NotChecked=0, Total=1056 [2020-10-05 23:08:41,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-05 23:08:41,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-05 23:08:41,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-05 23:08:41,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 120 transitions. [2020-10-05 23:08:41,273 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 120 transitions. Word has length 37 [2020-10-05 23:08:41,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:41,273 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 120 transitions. [2020-10-05 23:08:41,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-05 23:08:41,273 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 120 transitions. [2020-10-05 23:08:41,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-05 23:08:41,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:41,274 INFO L422 BasicCegarLoop]: trace histogram [29, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:08:41,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:08:41,484 INFO L427 AbstractCegarLoop]: === Iteration 32 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:08:41,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:41,484 INFO L82 PathProgramCache]: Analyzing trace with hash -2075503880, now seen corresponding path program 26 times [2020-10-05 23:08:41,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:41,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643575876] [2020-10-05 23:08:41,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:41,988 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:41,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643575876] [2020-10-05 23:08:41,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326145457] [2020-10-05 23:08:41,989 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 [2020-10-05 23:08:42,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:08:42,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:08:42,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-05 23:08:42,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:42,085 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:42,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:42,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 33 [2020-10-05 23:08:42,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597457741] [2020-10-05 23:08:42,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-05 23:08:42,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:42,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-05 23:08:42,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=563, Unknown=0, NotChecked=0, Total=1122 [2020-10-05 23:08:42,087 INFO L87 Difference]: Start difference. First operand 74 states and 120 transitions. Second operand 34 states. [2020-10-05 23:08:42,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:42,143 INFO L93 Difference]: Finished difference Result 75 states and 121 transitions. [2020-10-05 23:08:42,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-05 23:08:42,143 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 38 [2020-10-05 23:08:42,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:42,144 INFO L225 Difference]: With dead ends: 75 [2020-10-05 23:08:42,144 INFO L226 Difference]: Without dead ends: 75 [2020-10-05 23:08:42,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=559, Invalid=563, Unknown=0, NotChecked=0, Total=1122 [2020-10-05 23:08:42,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-05 23:08:42,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-05 23:08:42,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-05 23:08:42,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 121 transitions. [2020-10-05 23:08:42,148 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 121 transitions. Word has length 38 [2020-10-05 23:08:42,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:42,149 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 121 transitions. [2020-10-05 23:08:42,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-05 23:08:42,149 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 121 transitions. [2020-10-05 23:08:42,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-05 23:08:42,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:42,150 INFO L422 BasicCegarLoop]: trace histogram [30, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:08:42,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:08:42,350 INFO L427 AbstractCegarLoop]: === Iteration 33 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:08:42,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:42,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1344799345, now seen corresponding path program 27 times [2020-10-05 23:08:42,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:42,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113979534] [2020-10-05 23:08:42,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:42,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:42,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113979534] [2020-10-05 23:08:42,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116333072] [2020-10-05 23:08:42,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:08:45,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-10-05 23:08:45,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:08:45,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-05 23:08:45,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:45,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:45,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 34 [2020-10-05 23:08:45,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043096579] [2020-10-05 23:08:45,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-05 23:08:45,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:45,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-05 23:08:45,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=597, Unknown=0, NotChecked=0, Total=1190 [2020-10-05 23:08:45,442 INFO L87 Difference]: Start difference. First operand 75 states and 121 transitions. Second operand 35 states. [2020-10-05 23:08:45,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:45,492 INFO L93 Difference]: Finished difference Result 76 states and 122 transitions. [2020-10-05 23:08:45,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-05 23:08:45,492 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 39 [2020-10-05 23:08:45,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:45,493 INFO L225 Difference]: With dead ends: 76 [2020-10-05 23:08:45,493 INFO L226 Difference]: Without dead ends: 76 [2020-10-05 23:08:45,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=593, Invalid=597, Unknown=0, NotChecked=0, Total=1190 [2020-10-05 23:08:45,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-05 23:08:45,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-05 23:08:45,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-05 23:08:45,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 122 transitions. [2020-10-05 23:08:45,497 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 122 transitions. Word has length 39 [2020-10-05 23:08:45,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:45,498 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 122 transitions. [2020-10-05 23:08:45,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-05 23:08:45,498 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 122 transitions. [2020-10-05 23:08:45,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-05 23:08:45,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:45,499 INFO L422 BasicCegarLoop]: trace histogram [31, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:08:45,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-05 23:08:45,709 INFO L427 AbstractCegarLoop]: === Iteration 34 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:08:45,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:45,709 INFO L82 PathProgramCache]: Analyzing trace with hash -167795240, now seen corresponding path program 28 times [2020-10-05 23:08:45,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:45,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991847151] [2020-10-05 23:08:45,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:45,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:46,344 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:46,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991847151] [2020-10-05 23:08:46,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155239182] [2020-10-05 23:08:46,345 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 [2020-10-05 23:08:46,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:08:46,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:08:46,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 33 conjunts are in the unsatisfiable core [2020-10-05 23:08:46,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:46,470 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:46,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:46,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2020-10-05 23:08:46,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228712819] [2020-10-05 23:08:46,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-05 23:08:46,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:46,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-05 23:08:46,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=628, Invalid=632, Unknown=0, NotChecked=0, Total=1260 [2020-10-05 23:08:46,472 INFO L87 Difference]: Start difference. First operand 76 states and 122 transitions. Second operand 36 states. [2020-10-05 23:08:46,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:46,543 INFO L93 Difference]: Finished difference Result 77 states and 123 transitions. [2020-10-05 23:08:46,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-05 23:08:46,544 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 40 [2020-10-05 23:08:46,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:46,545 INFO L225 Difference]: With dead ends: 77 [2020-10-05 23:08:46,545 INFO L226 Difference]: Without dead ends: 77 [2020-10-05 23:08:46,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=628, Invalid=632, Unknown=0, NotChecked=0, Total=1260 [2020-10-05 23:08:46,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-05 23:08:46,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-05 23:08:46,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-05 23:08:46,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 123 transitions. [2020-10-05 23:08:46,548 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 123 transitions. Word has length 40 [2020-10-05 23:08:46,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:46,548 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 123 transitions. [2020-10-05 23:08:46,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-05 23:08:46,549 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 123 transitions. [2020-10-05 23:08:46,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-05 23:08:46,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:46,549 INFO L422 BasicCegarLoop]: trace histogram [32, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:08:46,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:08:46,758 INFO L427 AbstractCegarLoop]: === Iteration 35 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:08:46,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:46,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1959593647, now seen corresponding path program 29 times [2020-10-05 23:08:46,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:46,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486539033] [2020-10-05 23:08:46,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:47,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486539033] [2020-10-05 23:08:47,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508732551] [2020-10-05 23:08:47,401 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 [2020-10-05 23:08:57,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-10-05 23:08:57,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:08:57,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 34 conjunts are in the unsatisfiable core [2020-10-05 23:08:57,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:57,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:57,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2020-10-05 23:08:57,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289163111] [2020-10-05 23:08:57,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-05 23:08:57,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:57,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-05 23:08:57,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=664, Invalid=668, Unknown=0, NotChecked=0, Total=1332 [2020-10-05 23:08:57,960 INFO L87 Difference]: Start difference. First operand 77 states and 123 transitions. Second operand 37 states. [2020-10-05 23:08:58,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:58,023 INFO L93 Difference]: Finished difference Result 78 states and 124 transitions. [2020-10-05 23:08:58,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-05 23:08:58,024 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 41 [2020-10-05 23:08:58,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:58,025 INFO L225 Difference]: With dead ends: 78 [2020-10-05 23:08:58,025 INFO L226 Difference]: Without dead ends: 78 [2020-10-05 23:08:58,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=664, Invalid=668, Unknown=0, NotChecked=0, Total=1332 [2020-10-05 23:08:58,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-05 23:08:58,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-05 23:08:58,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-05 23:08:58,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 124 transitions. [2020-10-05 23:08:58,028 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 124 transitions. Word has length 41 [2020-10-05 23:08:58,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:58,029 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 124 transitions. [2020-10-05 23:08:58,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-05 23:08:58,029 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 124 transitions. [2020-10-05 23:08:58,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-05 23:08:58,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:58,029 INFO L422 BasicCegarLoop]: trace histogram [33, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:08:58,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-05 23:08:58,230 INFO L427 AbstractCegarLoop]: === Iteration 36 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:08:58,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:58,231 INFO L82 PathProgramCache]: Analyzing trace with hash -810827592, now seen corresponding path program 30 times [2020-10-05 23:08:58,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:58,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321784505] [2020-10-05 23:08:58,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:58,916 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:08:58,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321784505] [2020-10-05 23:08:58,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634667427] [2020-10-05 23:08:58,916 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 [2020-10-05 23:09:37,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2020-10-05 23:09:37,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:09:37,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 35 conjunts are in the unsatisfiable core [2020-10-05 23:09:37,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:09:37,949 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:09:37,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:09:37,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2020-10-05 23:09:37,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160096283] [2020-10-05 23:09:37,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-05 23:09:37,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:09:37,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-05 23:09:37,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=705, Unknown=0, NotChecked=0, Total=1406 [2020-10-05 23:09:37,951 INFO L87 Difference]: Start difference. First operand 78 states and 124 transitions. Second operand 38 states. [2020-10-05 23:09:38,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:09:38,001 INFO L93 Difference]: Finished difference Result 79 states and 125 transitions. [2020-10-05 23:09:38,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-05 23:09:38,001 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 42 [2020-10-05 23:09:38,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:09:38,002 INFO L225 Difference]: With dead ends: 79 [2020-10-05 23:09:38,002 INFO L226 Difference]: Without dead ends: 79 [2020-10-05 23:09:38,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=701, Invalid=705, Unknown=0, NotChecked=0, Total=1406 [2020-10-05 23:09:38,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-05 23:09:38,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-05 23:09:38,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-05 23:09:38,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 125 transitions. [2020-10-05 23:09:38,006 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 125 transitions. Word has length 42 [2020-10-05 23:09:38,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:09:38,007 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 125 transitions. [2020-10-05 23:09:38,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-05 23:09:38,007 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 125 transitions. [2020-10-05 23:09:38,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-05 23:09:38,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:09:38,008 INFO L422 BasicCegarLoop]: trace histogram [34, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:09:38,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:09:38,220 INFO L427 AbstractCegarLoop]: === Iteration 37 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:09:38,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:09:38,220 INFO L82 PathProgramCache]: Analyzing trace with hash -794540081, now seen corresponding path program 31 times [2020-10-05 23:09:38,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:09:38,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335029317] [2020-10-05 23:09:38,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:09:38,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:09:38,904 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:09:38,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335029317] [2020-10-05 23:09:38,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113445616] [2020-10-05 23:09:38,904 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 [2020-10-05 23:09:38,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:09:38,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 36 conjunts are in the unsatisfiable core [2020-10-05 23:09:38,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:09:39,009 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:09:39,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:09:39,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 38 [2020-10-05 23:09:39,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33135483] [2020-10-05 23:09:39,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-05 23:09:39,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:09:39,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-05 23:09:39,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=739, Invalid=743, Unknown=0, NotChecked=0, Total=1482 [2020-10-05 23:09:39,013 INFO L87 Difference]: Start difference. First operand 79 states and 125 transitions. Second operand 39 states. [2020-10-05 23:09:39,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:09:39,076 INFO L93 Difference]: Finished difference Result 80 states and 126 transitions. [2020-10-05 23:09:39,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-05 23:09:39,077 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 43 [2020-10-05 23:09:39,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:09:39,078 INFO L225 Difference]: With dead ends: 80 [2020-10-05 23:09:39,078 INFO L226 Difference]: Without dead ends: 80 [2020-10-05 23:09:39,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=739, Invalid=743, Unknown=0, NotChecked=0, Total=1482 [2020-10-05 23:09:39,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-05 23:09:39,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-05 23:09:39,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-05 23:09:39,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 126 transitions. [2020-10-05 23:09:39,082 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 126 transitions. Word has length 43 [2020-10-05 23:09:39,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:09:39,082 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 126 transitions. [2020-10-05 23:09:39,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-05 23:09:39,082 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 126 transitions. [2020-10-05 23:09:39,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-05 23:09:39,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:09:39,083 INFO L422 BasicCegarLoop]: trace histogram [35, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:09:39,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-05 23:09:39,295 INFO L427 AbstractCegarLoop]: === Iteration 38 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:09:39,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:09:39,295 INFO L82 PathProgramCache]: Analyzing trace with hash -289627240, now seen corresponding path program 32 times [2020-10-05 23:09:39,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:09:39,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357623639] [2020-10-05 23:09:39,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:09:39,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:09:40,078 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:09:40,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357623639] [2020-10-05 23:09:40,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821288987] [2020-10-05 23:09:40,079 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 [2020-10-05 23:09:40,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:09:40,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:09:40,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 37 conjunts are in the unsatisfiable core [2020-10-05 23:09:40,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:09:40,185 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:09:40,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:09:40,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2020-10-05 23:09:40,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715061795] [2020-10-05 23:09:40,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-05 23:09:40,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:09:40,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-05 23:09:40,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=778, Invalid=782, Unknown=0, NotChecked=0, Total=1560 [2020-10-05 23:09:40,188 INFO L87 Difference]: Start difference. First operand 80 states and 126 transitions. Second operand 40 states. [2020-10-05 23:09:40,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:09:40,245 INFO L93 Difference]: Finished difference Result 81 states and 127 transitions. [2020-10-05 23:09:40,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-05 23:09:40,246 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 44 [2020-10-05 23:09:40,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:09:40,247 INFO L225 Difference]: With dead ends: 81 [2020-10-05 23:09:40,247 INFO L226 Difference]: Without dead ends: 81 [2020-10-05 23:09:40,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=778, Invalid=782, Unknown=0, NotChecked=0, Total=1560 [2020-10-05 23:09:40,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-05 23:09:40,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-05 23:09:40,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-05 23:09:40,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 127 transitions. [2020-10-05 23:09:40,251 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 127 transitions. Word has length 44 [2020-10-05 23:09:40,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:09:40,251 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 127 transitions. [2020-10-05 23:09:40,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-05 23:09:40,251 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 127 transitions. [2020-10-05 23:09:40,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-05 23:09:40,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:09:40,252 INFO L422 BasicCegarLoop]: trace histogram [36, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:09:40,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-05 23:09:40,464 INFO L427 AbstractCegarLoop]: === Iteration 39 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:09:40,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:09:40,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1817198353, now seen corresponding path program 33 times [2020-10-05 23:09:40,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:09:40,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151733945] [2020-10-05 23:09:40,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:09:40,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:09:41,244 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:09:41,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151733945] [2020-10-05 23:09:41,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181942291] [2020-10-05 23:09:41,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:09:48,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2020-10-05 23:09:48,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:09:48,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 38 conjunts are in the unsatisfiable core [2020-10-05 23:09:48,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:09:48,768 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:09:48,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:09:48,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 40 [2020-10-05 23:09:48,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727526755] [2020-10-05 23:09:48,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-05 23:09:48,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:09:48,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-05 23:09:48,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=822, Unknown=0, NotChecked=0, Total=1640 [2020-10-05 23:09:48,770 INFO L87 Difference]: Start difference. First operand 81 states and 127 transitions. Second operand 41 states. [2020-10-05 23:09:48,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:09:48,829 INFO L93 Difference]: Finished difference Result 82 states and 128 transitions. [2020-10-05 23:09:48,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-05 23:09:48,829 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 45 [2020-10-05 23:09:48,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:09:48,830 INFO L225 Difference]: With dead ends: 82 [2020-10-05 23:09:48,830 INFO L226 Difference]: Without dead ends: 82 [2020-10-05 23:09:48,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=818, Invalid=822, Unknown=0, NotChecked=0, Total=1640 [2020-10-05 23:09:48,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-05 23:09:48,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-05 23:09:48,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-05 23:09:48,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 128 transitions. [2020-10-05 23:09:48,834 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 128 transitions. Word has length 45 [2020-10-05 23:09:48,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:09:48,834 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 128 transitions. [2020-10-05 23:09:48,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-05 23:09:48,834 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 128 transitions. [2020-10-05 23:09:48,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-05 23:09:48,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:09:48,835 INFO L422 BasicCegarLoop]: trace histogram [37, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:09:49,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-05 23:09:49,036 INFO L427 AbstractCegarLoop]: === Iteration 40 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:09:49,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:09:49,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1927262600, now seen corresponding path program 34 times [2020-10-05 23:09:49,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:09:49,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094784222] [2020-10-05 23:09:49,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:09:49,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:09:49,875 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:09:49,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094784222] [2020-10-05 23:09:49,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704399390] [2020-10-05 23:09:49,875 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:09:49,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:09:49,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:09:49,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 39 conjunts are in the unsatisfiable core [2020-10-05 23:09:49,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:09:49,972 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:09:49,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:09:49,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 41 [2020-10-05 23:09:49,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963370164] [2020-10-05 23:09:49,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-05 23:09:49,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:09:49,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-05 23:09:49,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=859, Invalid=863, Unknown=0, NotChecked=0, Total=1722 [2020-10-05 23:09:49,975 INFO L87 Difference]: Start difference. First operand 82 states and 128 transitions. Second operand 42 states. [2020-10-05 23:09:50,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:09:50,048 INFO L93 Difference]: Finished difference Result 83 states and 129 transitions. [2020-10-05 23:09:50,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-05 23:09:50,051 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 46 [2020-10-05 23:09:50,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:09:50,052 INFO L225 Difference]: With dead ends: 83 [2020-10-05 23:09:50,052 INFO L226 Difference]: Without dead ends: 83 [2020-10-05 23:09:50,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=859, Invalid=863, Unknown=0, NotChecked=0, Total=1722 [2020-10-05 23:09:50,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-05 23:09:50,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-05 23:09:50,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-05 23:09:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 129 transitions. [2020-10-05 23:09:50,056 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 129 transitions. Word has length 46 [2020-10-05 23:09:50,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:09:50,056 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 129 transitions. [2020-10-05 23:09:50,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-05 23:09:50,056 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 129 transitions. [2020-10-05 23:09:50,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-05 23:09:50,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:09:50,057 INFO L422 BasicCegarLoop]: trace histogram [38, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:09:50,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-05 23:09:50,258 INFO L427 AbstractCegarLoop]: === Iteration 41 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:09:50,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:09:50,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1044286961, now seen corresponding path program 35 times [2020-10-05 23:09:50,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:09:50,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615932554] [2020-10-05 23:09:50,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:09:50,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:09:51,302 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:09:51,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615932554] [2020-10-05 23:09:51,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300726627] [2020-10-05 23:09:51,303 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:10:15,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2020-10-05 23:10:15,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:10:15,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 40 conjunts are in the unsatisfiable core [2020-10-05 23:10:15,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:10:15,319 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:10:15,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:10:15,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 42 [2020-10-05 23:10:15,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885385301] [2020-10-05 23:10:15,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-05 23:10:15,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:10:15,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-05 23:10:15,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=905, Unknown=0, NotChecked=0, Total=1806 [2020-10-05 23:10:15,322 INFO L87 Difference]: Start difference. First operand 83 states and 129 transitions. Second operand 43 states. [2020-10-05 23:10:15,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:10:15,389 INFO L93 Difference]: Finished difference Result 84 states and 130 transitions. [2020-10-05 23:10:15,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-05 23:10:15,390 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 47 [2020-10-05 23:10:15,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:10:15,390 INFO L225 Difference]: With dead ends: 84 [2020-10-05 23:10:15,391 INFO L226 Difference]: Without dead ends: 84 [2020-10-05 23:10:15,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=901, Invalid=905, Unknown=0, NotChecked=0, Total=1806 [2020-10-05 23:10:15,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-05 23:10:15,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-05 23:10:15,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-05 23:10:15,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 130 transitions. [2020-10-05 23:10:15,394 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 130 transitions. Word has length 47 [2020-10-05 23:10:15,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:10:15,394 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 130 transitions. [2020-10-05 23:10:15,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-05 23:10:15,395 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 130 transitions. [2020-10-05 23:10:15,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-05 23:10:15,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:10:15,395 INFO L422 BasicCegarLoop]: trace histogram [39, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:10:15,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:10:15,605 INFO L427 AbstractCegarLoop]: === Iteration 42 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:10:15,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:10:15,606 INFO L82 PathProgramCache]: Analyzing trace with hash 558154072, now seen corresponding path program 36 times [2020-10-05 23:10:15,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:10:15,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359716695] [2020-10-05 23:10:15,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:10:15,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:10:16,594 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:10:16,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359716695] [2020-10-05 23:10:16,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803882403] [2020-10-05 23:10:16,594 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:10:18,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-10-05 23:10:18,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:10:18,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 41 conjunts are in the unsatisfiable core [2020-10-05 23:10:18,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:10:18,909 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:10:18,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:10:18,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2020-10-05 23:10:18,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638324286] [2020-10-05 23:10:18,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-05 23:10:18,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:10:18,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-05 23:10:18,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=944, Invalid=948, Unknown=0, NotChecked=0, Total=1892 [2020-10-05 23:10:18,910 INFO L87 Difference]: Start difference. First operand 84 states and 130 transitions. Second operand 44 states. [2020-10-05 23:10:18,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:10:18,979 INFO L93 Difference]: Finished difference Result 85 states and 131 transitions. [2020-10-05 23:10:18,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-05 23:10:18,979 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 48 [2020-10-05 23:10:18,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:10:18,980 INFO L225 Difference]: With dead ends: 85 [2020-10-05 23:10:18,980 INFO L226 Difference]: Without dead ends: 85 [2020-10-05 23:10:18,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=944, Invalid=948, Unknown=0, NotChecked=0, Total=1892 [2020-10-05 23:10:18,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-05 23:10:18,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-05 23:10:18,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-05 23:10:18,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 131 transitions. [2020-10-05 23:10:18,984 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 131 transitions. Word has length 48 [2020-10-05 23:10:18,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:10:18,984 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 131 transitions. [2020-10-05 23:10:18,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-05 23:10:18,984 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 131 transitions. [2020-10-05 23:10:18,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-05 23:10:18,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:10:18,985 INFO L422 BasicCegarLoop]: trace histogram [40, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:10:19,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-05 23:10:19,195 INFO L427 AbstractCegarLoop]: === Iteration 43 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:10:19,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:10:19,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1305781457, now seen corresponding path program 37 times [2020-10-05 23:10:19,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:10:19,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723395108] [2020-10-05 23:10:19,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:10:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:10:20,132 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:10:20,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723395108] [2020-10-05 23:10:20,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624332754] [2020-10-05 23:10:20,133 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:10:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:10:20,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 42 conjunts are in the unsatisfiable core [2020-10-05 23:10:20,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:10:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:10:20,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:10:20,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 44 [2020-10-05 23:10:20,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769114913] [2020-10-05 23:10:20,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-05 23:10:20,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:10:20,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-05 23:10:20,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=988, Invalid=992, Unknown=0, NotChecked=0, Total=1980 [2020-10-05 23:10:20,253 INFO L87 Difference]: Start difference. First operand 85 states and 131 transitions. Second operand 45 states. [2020-10-05 23:10:20,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:10:20,333 INFO L93 Difference]: Finished difference Result 86 states and 132 transitions. [2020-10-05 23:10:20,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-05 23:10:20,334 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 49 [2020-10-05 23:10:20,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:10:20,334 INFO L225 Difference]: With dead ends: 86 [2020-10-05 23:10:20,335 INFO L226 Difference]: Without dead ends: 86 [2020-10-05 23:10:20,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=988, Invalid=992, Unknown=0, NotChecked=0, Total=1980 [2020-10-05 23:10:20,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-05 23:10:20,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-05 23:10:20,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-05 23:10:20,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 132 transitions. [2020-10-05 23:10:20,338 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 132 transitions. Word has length 49 [2020-10-05 23:10:20,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:10:20,338 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 132 transitions. [2020-10-05 23:10:20,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-05 23:10:20,339 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 132 transitions. [2020-10-05 23:10:20,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-05 23:10:20,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:10:20,339 INFO L422 BasicCegarLoop]: trace histogram [41, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:10:20,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:10:20,550 INFO L427 AbstractCegarLoop]: === Iteration 44 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:10:20,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:10:20,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1041759288, now seen corresponding path program 38 times [2020-10-05 23:10:20,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:10:20,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362001974] [2020-10-05 23:10:20,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:10:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:10:21,558 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:10:21,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362001974] [2020-10-05 23:10:21,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977962224] [2020-10-05 23:10:21,559 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:10:21,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:10:21,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:10:21,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 43 conjunts are in the unsatisfiable core [2020-10-05 23:10:21,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:10:21,658 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:10:21,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:10:21,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 45 [2020-10-05 23:10:21,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143469154] [2020-10-05 23:10:21,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-05 23:10:21,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:10:21,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-05 23:10:21,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1033, Invalid=1037, Unknown=0, NotChecked=0, Total=2070 [2020-10-05 23:10:21,661 INFO L87 Difference]: Start difference. First operand 86 states and 132 transitions. Second operand 46 states. [2020-10-05 23:10:21,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:10:21,727 INFO L93 Difference]: Finished difference Result 87 states and 133 transitions. [2020-10-05 23:10:21,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-05 23:10:21,728 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 50 [2020-10-05 23:10:21,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:10:21,729 INFO L225 Difference]: With dead ends: 87 [2020-10-05 23:10:21,729 INFO L226 Difference]: Without dead ends: 87 [2020-10-05 23:10:21,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1033, Invalid=1037, Unknown=0, NotChecked=0, Total=2070 [2020-10-05 23:10:21,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-05 23:10:21,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-05 23:10:21,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-05 23:10:21,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 133 transitions. [2020-10-05 23:10:21,732 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 133 transitions. Word has length 50 [2020-10-05 23:10:21,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:10:21,732 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 133 transitions. [2020-10-05 23:10:21,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-05 23:10:21,732 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 133 transitions. [2020-10-05 23:10:21,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-05 23:10:21,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:10:21,733 INFO L422 BasicCegarLoop]: trace histogram [42, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:10:21,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:10:21,942 INFO L427 AbstractCegarLoop]: === Iteration 45 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:10:21,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:10:21,942 INFO L82 PathProgramCache]: Analyzing trace with hash 801078351, now seen corresponding path program 39 times [2020-10-05 23:10:21,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:10:21,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132887434] [2020-10-05 23:10:21,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:10:21,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:10:23,008 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:10:23,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132887434] [2020-10-05 23:10:23,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310383349] [2020-10-05 23:10:23,008 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:10:43,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-10-05 23:10:43,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:10:44,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 44 conjunts are in the unsatisfiable core [2020-10-05 23:10:44,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:10:44,133 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:10:44,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:10:44,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 46 [2020-10-05 23:10:44,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678607248] [2020-10-05 23:10:44,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-05 23:10:44,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:10:44,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-05 23:10:44,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1079, Invalid=1083, Unknown=0, NotChecked=0, Total=2162 [2020-10-05 23:10:44,137 INFO L87 Difference]: Start difference. First operand 87 states and 133 transitions. Second operand 47 states. [2020-10-05 23:10:44,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:10:44,204 INFO L93 Difference]: Finished difference Result 88 states and 134 transitions. [2020-10-05 23:10:44,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-05 23:10:44,205 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 51 [2020-10-05 23:10:44,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:10:44,206 INFO L225 Difference]: With dead ends: 88 [2020-10-05 23:10:44,206 INFO L226 Difference]: Without dead ends: 88 [2020-10-05 23:10:44,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1079, Invalid=1083, Unknown=0, NotChecked=0, Total=2162 [2020-10-05 23:10:44,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-05 23:10:44,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-05 23:10:44,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-05 23:10:44,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 134 transitions. [2020-10-05 23:10:44,209 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 134 transitions. Word has length 51 [2020-10-05 23:10:44,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:10:44,209 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 134 transitions. [2020-10-05 23:10:44,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-05 23:10:44,210 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 134 transitions. [2020-10-05 23:10:44,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-05 23:10:44,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:10:44,210 INFO L422 BasicCegarLoop]: trace histogram [43, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:10:44,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-05 23:10:44,411 INFO L427 AbstractCegarLoop]: === Iteration 46 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:10:44,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:10:44,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1929903896, now seen corresponding path program 40 times [2020-10-05 23:10:44,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:10:44,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875225148] [2020-10-05 23:10:44,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:10:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:10:45,534 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:10:45,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875225148] [2020-10-05 23:10:45,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546615952] [2020-10-05 23:10:45,535 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:10:45,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:10:45,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:10:45,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 45 conjunts are in the unsatisfiable core [2020-10-05 23:10:45,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:10:45,640 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:10:45,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:10:45,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 47 [2020-10-05 23:10:45,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919135160] [2020-10-05 23:10:45,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-05 23:10:45,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:10:45,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-05 23:10:45,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1126, Invalid=1130, Unknown=0, NotChecked=0, Total=2256 [2020-10-05 23:10:45,642 INFO L87 Difference]: Start difference. First operand 88 states and 134 transitions. Second operand 48 states. [2020-10-05 23:10:45,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:10:45,721 INFO L93 Difference]: Finished difference Result 89 states and 135 transitions. [2020-10-05 23:10:45,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-05 23:10:45,721 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 52 [2020-10-05 23:10:45,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:10:45,722 INFO L225 Difference]: With dead ends: 89 [2020-10-05 23:10:45,722 INFO L226 Difference]: Without dead ends: 89 [2020-10-05 23:10:45,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1126, Invalid=1130, Unknown=0, NotChecked=0, Total=2256 [2020-10-05 23:10:45,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-05 23:10:45,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-05 23:10:45,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-05 23:10:45,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 135 transitions. [2020-10-05 23:10:45,725 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 135 transitions. Word has length 52 [2020-10-05 23:10:45,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:10:45,726 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 135 transitions. [2020-10-05 23:10:45,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-05 23:10:45,726 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 135 transitions. [2020-10-05 23:10:45,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-05 23:10:45,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:10:45,727 INFO L422 BasicCegarLoop]: trace histogram [44, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:10:45,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-05 23:10:45,935 INFO L427 AbstractCegarLoop]: === Iteration 47 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:10:45,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:10:45,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1731209873, now seen corresponding path program 41 times [2020-10-05 23:10:45,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:10:45,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953727691] [2020-10-05 23:10:45,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:10:45,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:10:47,115 INFO L134 CoverageAnalysis]: Checked inductivity of 993 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:10:47,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953727691] [2020-10-05 23:10:47,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266692781] [2020-10-05 23:10:47,115 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:11:35,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2020-10-05 23:11:35,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:11:35,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 46 conjunts are in the unsatisfiable core [2020-10-05 23:11:35,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:11:35,979 INFO L134 CoverageAnalysis]: Checked inductivity of 993 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:11:35,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:11:35,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 48 [2020-10-05 23:11:35,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602475507] [2020-10-05 23:11:35,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-05 23:11:35,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:11:35,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-05 23:11:35,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1174, Invalid=1178, Unknown=0, NotChecked=0, Total=2352 [2020-10-05 23:11:35,981 INFO L87 Difference]: Start difference. First operand 89 states and 135 transitions. Second operand 49 states. [2020-10-05 23:11:36,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:11:36,056 INFO L93 Difference]: Finished difference Result 90 states and 136 transitions. [2020-10-05 23:11:36,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-05 23:11:36,057 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 53 [2020-10-05 23:11:36,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:11:36,058 INFO L225 Difference]: With dead ends: 90 [2020-10-05 23:11:36,058 INFO L226 Difference]: Without dead ends: 90 [2020-10-05 23:11:36,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1174, Invalid=1178, Unknown=0, NotChecked=0, Total=2352 [2020-10-05 23:11:36,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-05 23:11:36,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-05 23:11:36,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-05 23:11:36,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 136 transitions. [2020-10-05 23:11:36,061 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 136 transitions. Word has length 53 [2020-10-05 23:11:36,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:11:36,061 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 136 transitions. [2020-10-05 23:11:36,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-05 23:11:36,061 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 136 transitions. [2020-10-05 23:11:36,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-05 23:11:36,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:11:36,062 INFO L422 BasicCegarLoop]: trace histogram [45, 2, 2, 1, 1, 1, 1, 1] [2020-10-05 23:11:36,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-10-05 23:11:36,272 INFO L427 AbstractCegarLoop]: === Iteration 48 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-05 23:11:36,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:11:36,272 INFO L82 PathProgramCache]: Analyzing trace with hash 738380280, now seen corresponding path program 42 times [2020-10-05 23:11:36,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:11:36,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082078878] [2020-10-05 23:11:36,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:11:36,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:11:37,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-05 23:11:37,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082078878] [2020-10-05 23:11:37,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368708119] [2020-10-05 23:11:37,486 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown