/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7a177ad [2020-11-09 13:29:53,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-09 13:29:53,413 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-09 13:29:53,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-09 13:29:53,449 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-09 13:29:53,451 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-09 13:29:53,453 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-09 13:29:53,455 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-09 13:29:53,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-09 13:29:53,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-09 13:29:53,460 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-09 13:29:53,462 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-09 13:29:53,462 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-09 13:29:53,464 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-09 13:29:53,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-09 13:29:53,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-09 13:29:53,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-09 13:29:53,469 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-09 13:29:53,471 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-09 13:29:53,474 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-09 13:29:53,476 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-09 13:29:53,477 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-09 13:29:53,479 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-09 13:29:53,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-09 13:29:53,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-09 13:29:53,501 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-09 13:29:53,501 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-09 13:29:53,503 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-09 13:29:53,503 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-09 13:29:53,508 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-09 13:29:53,508 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-09 13:29:53,509 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-09 13:29:53,510 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-09 13:29:53,511 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-09 13:29:53,513 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-09 13:29:53,513 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-09 13:29:53,514 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-09 13:29:53,514 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-09 13:29:53,514 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-09 13:29:53,515 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-09 13:29:53,516 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-09 13:29:53,517 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 [2020-11-09 13:29:53,546 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-09 13:29:53,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-09 13:29:53,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-09 13:29:53,548 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-09 13:29:53,548 INFO L138 SettingsManager]: * Use SBE=true [2020-11-09 13:29:53,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-09 13:29:53,549 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-09 13:29:53,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-09 13:29:53,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-09 13:29:53,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-09 13:29:53,550 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-09 13:29:53,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-09 13:29:53,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-09 13:29:53,550 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-09 13:29:53,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-09 13:29:53,551 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-09 13:29:53,551 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-09 13:29:53,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-09 13:29:53,551 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-09 13:29:53,552 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-09 13:29:53,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-09 13:29:53,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-09 13:29:53,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-09 13:29:53,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-11-09 13:29:53,553 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-09 13:29:53,553 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-09 13:29:53,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-09 13:29:53,553 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-11-09 13:29:53,553 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-09 13:29:53,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-09 13:29:53,965 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-09 13:29:53,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-09 13:29:53,970 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-09 13:29:53,971 INFO L275 PluginConnector]: CDTParser initialized [2020-11-09 13:29:53,972 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-11-09 13:29:54,046 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efdae694b/e5fe09d2521c466a9f0e914ec60e05bc/FLAG043df1c1e [2020-11-09 13:29:54,750 INFO L306 CDTParser]: Found 1 translation units. [2020-11-09 13:29:54,751 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-11-09 13:29:54,766 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efdae694b/e5fe09d2521c466a9f0e914ec60e05bc/FLAG043df1c1e [2020-11-09 13:29:55,055 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efdae694b/e5fe09d2521c466a9f0e914ec60e05bc [2020-11-09 13:29:55,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-09 13:29:55,065 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-09 13:29:55,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-09 13:29:55,067 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-09 13:29:55,071 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-09 13:29:55,072 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:29:55" (1/1) ... [2020-11-09 13:29:55,075 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7087fcf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:55, skipping insertion in model container [2020-11-09 13:29:55,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:29:55" (1/1) ... [2020-11-09 13:29:55,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-09 13:29:55,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-09 13:29:55,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-09 13:29:55,566 INFO L203 MainTranslator]: Completed pre-run [2020-11-09 13:29:55,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-09 13:29:55,724 INFO L208 MainTranslator]: Completed translation [2020-11-09 13:29:55,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:55 WrapperNode [2020-11-09 13:29:55,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-09 13:29:55,726 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-09 13:29:55,726 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-09 13:29:55,726 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-09 13:29:55,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:55" (1/1) ... [2020-11-09 13:29:55,748 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:55" (1/1) ... [2020-11-09 13:29:55,770 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-09 13:29:55,771 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-09 13:29:55,771 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-09 13:29:55,771 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-09 13:29:55,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:55" (1/1) ... [2020-11-09 13:29:55,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:55" (1/1) ... [2020-11-09 13:29:55,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:55" (1/1) ... [2020-11-09 13:29:55,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:55" (1/1) ... [2020-11-09 13:29:55,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:55" (1/1) ... [2020-11-09 13:29:55,795 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:55" (1/1) ... [2020-11-09 13:29:55,797 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:55" (1/1) ... [2020-11-09 13:29:55,801 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-09 13:29:55,802 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-09 13:29:55,802 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-09 13:29:55,802 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-09 13:29:55,803 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:55" (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 [2020-11-09 13:29:55,885 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-09 13:29:55,886 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-09 13:29:55,886 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-09 13:29:55,886 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-09 13:29:55,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-09 13:29:55,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-09 13:29:55,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-09 13:29:55,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-09 13:29:55,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-09 13:29:55,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-09 13:29:55,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-09 13:29:55,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-09 13:29:55,894 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-09 13:29:56,455 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-09 13:29:56,455 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-09 13:29:56,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:29:56 BoogieIcfgContainer [2020-11-09 13:29:56,458 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-09 13:29:56,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-09 13:29:56,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-09 13:29:56,466 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-09 13:29:56,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 01:29:55" (1/3) ... [2020-11-09 13:29:56,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a26c9ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:29:56, skipping insertion in model container [2020-11-09 13:29:56,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:55" (2/3) ... [2020-11-09 13:29:56,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a26c9ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:29:56, skipping insertion in model container [2020-11-09 13:29:56,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:29:56" (3/3) ... [2020-11-09 13:29:56,470 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2020-11-09 13:29:56,487 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-09 13:29:56,487 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-09 13:29:56,491 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-09 13:29:56,492 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-09 13:29:56,535 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,536 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,536 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,536 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,536 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,537 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,537 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,538 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,538 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,538 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,539 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,539 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,540 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,540 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,540 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,540 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,540 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,541 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,542 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,542 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,542 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,542 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,543 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,543 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,543 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,543 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,543 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,544 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,544 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,545 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,545 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,545 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,546 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,546 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,546 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,546 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,546 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,546 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,547 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,548 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,548 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,548 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,548 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,549 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,549 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,549 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,550 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,550 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,551 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,551 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,551 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,552 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,552 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,552 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,552 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,553 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,556 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,556 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,556 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,556 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,557 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,557 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,563 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,563 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,563 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,563 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,564 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,564 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:56,567 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-09 13:29:56,581 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-09 13:29:56,605 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-09 13:29:56,605 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-09 13:29:56,605 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-09 13:29:56,605 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-09 13:29:56,606 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-09 13:29:56,606 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-09 13:29:56,606 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-09 13:29:56,606 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-09 13:29:56,618 INFO L128 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-11-09 13:29:56,619 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-09 13:29:56,622 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-09 13:29:56,625 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-11-09 13:29:56,666 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-11-09 13:29:56,666 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-09 13:29:56,671 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 62 events. 6/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 97 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2020-11-09 13:29:56,674 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2020-11-09 13:29:58,714 WARN L194 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-11-09 13:29:58,901 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-11-09 13:29:59,717 WARN L194 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-11-09 13:29:59,826 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-11-09 13:30:00,089 WARN L194 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-11-09 13:30:00,209 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-11-09 13:30:00,633 WARN L194 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-11-09 13:30:00,799 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-09 13:30:01,148 WARN L194 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-11-09 13:30:01,306 WARN L194 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-09 13:30:01,363 INFO L131 LiptonReduction]: Checked pairs total: 1187 [2020-11-09 13:30:01,363 INFO L133 LiptonReduction]: Total number of compositions: 62 [2020-11-09 13:30:01,370 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-11-09 13:30:01,381 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-11-09 13:30:01,383 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-11-09 13:30:01,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-09 13:30:01,388 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:01,389 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-09 13:30:01,390 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:01,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:01,396 INFO L82 PathProgramCache]: Analyzing trace with hash -805875314, now seen corresponding path program 1 times [2020-11-09 13:30:01,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:01,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948387901] [2020-11-09 13:30:01,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:01,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:01,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948387901] [2020-11-09 13:30:01,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 13:30:01,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-09 13:30:01,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422656900] [2020-11-09 13:30:01,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-09 13:30:01,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:01,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-09 13:30:01,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-09 13:30:01,650 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-11-09 13:30:01,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:01,733 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-11-09 13:30:01,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-09 13:30:01,735 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-09 13:30:01,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:01,748 INFO L225 Difference]: With dead ends: 75 [2020-11-09 13:30:01,748 INFO L226 Difference]: Without dead ends: 42 [2020-11-09 13:30:01,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-09 13:30:01,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-09 13:30:01,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-09 13:30:01,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 13:30:01,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-11-09 13:30:01,794 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-11-09 13:30:01,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:01,795 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-11-09 13:30:01,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-09 13:30:01,795 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-11-09 13:30:01,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-09 13:30:01,796 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:01,796 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:01,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-09 13:30:01,797 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:01,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:01,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1351909113, now seen corresponding path program 1 times [2020-11-09 13:30:01,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:01,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621858729] [2020-11-09 13:30:01,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:01,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:01,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:01,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621858729] [2020-11-09 13:30:01,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 13:30:01,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-09 13:30:01,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433399144] [2020-11-09 13:30:01,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-09 13:30:01,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:01,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-09 13:30:01,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-09 13:30:01,933 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-11-09 13:30:01,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:01,968 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-11-09 13:30:01,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-09 13:30:01,968 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-09 13:30:01,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:01,970 INFO L225 Difference]: With dead ends: 56 [2020-11-09 13:30:01,970 INFO L226 Difference]: Without dead ends: 50 [2020-11-09 13:30:01,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-11-09 13:30:01,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-09 13:30:01,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-11-09 13:30:01,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 13:30:01,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-11-09 13:30:01,980 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-11-09 13:30:01,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:01,981 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-11-09 13:30:01,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-09 13:30:01,981 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-11-09 13:30:01,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-09 13:30:01,982 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:01,982 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:01,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-09 13:30:01,983 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:01,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:01,984 INFO L82 PathProgramCache]: Analyzing trace with hash 2021583950, now seen corresponding path program 1 times [2020-11-09 13:30:01,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:01,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499169907] [2020-11-09 13:30:01,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:02,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:02,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:02,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499169907] [2020-11-09 13:30:02,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 13:30:02,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-09 13:30:02,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484005747] [2020-11-09 13:30:02,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-09 13:30:02,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:02,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-09 13:30:02,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-09 13:30:02,125 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-11-09 13:30:02,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:02,236 INFO L93 Difference]: Finished difference Result 54 states and 124 transitions. [2020-11-09 13:30:02,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-09 13:30:02,237 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-09 13:30:02,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:02,238 INFO L225 Difference]: With dead ends: 54 [2020-11-09 13:30:02,238 INFO L226 Difference]: Without dead ends: 47 [2020-11-09 13:30:02,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-09 13:30:02,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-09 13:30:02,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-11-09 13:30:02,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-09 13:30:02,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 106 transitions. [2020-11-09 13:30:02,247 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 106 transitions. Word has length 10 [2020-11-09 13:30:02,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:02,249 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 106 transitions. [2020-11-09 13:30:02,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-09 13:30:02,249 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 106 transitions. [2020-11-09 13:30:02,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-09 13:30:02,250 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:02,251 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:02,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-09 13:30:02,251 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:02,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:02,252 INFO L82 PathProgramCache]: Analyzing trace with hash 2101929440, now seen corresponding path program 2 times [2020-11-09 13:30:02,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:02,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828857077] [2020-11-09 13:30:02,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:02,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:02,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:02,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828857077] [2020-11-09 13:30:02,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 13:30:02,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-09 13:30:02,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858878419] [2020-11-09 13:30:02,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-09 13:30:02,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:02,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-09 13:30:02,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-09 13:30:02,322 INFO L87 Difference]: Start difference. First operand 45 states and 106 transitions. Second operand 6 states. [2020-11-09 13:30:02,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:02,397 INFO L93 Difference]: Finished difference Result 59 states and 138 transitions. [2020-11-09 13:30:02,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-09 13:30:02,397 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-09 13:30:02,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:02,398 INFO L225 Difference]: With dead ends: 59 [2020-11-09 13:30:02,398 INFO L226 Difference]: Without dead ends: 53 [2020-11-09 13:30:02,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-11-09 13:30:02,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-09 13:30:02,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2020-11-09 13:30:02,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-09 13:30:02,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 96 transitions. [2020-11-09 13:30:02,406 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 96 transitions. Word has length 10 [2020-11-09 13:30:02,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:02,406 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 96 transitions. [2020-11-09 13:30:02,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-09 13:30:02,406 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 96 transitions. [2020-11-09 13:30:02,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-09 13:30:02,407 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:02,407 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:02,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-09 13:30:02,408 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:02,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:02,408 INFO L82 PathProgramCache]: Analyzing trace with hash 2082353870, now seen corresponding path program 3 times [2020-11-09 13:30:02,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:02,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461169339] [2020-11-09 13:30:02,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:02,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:02,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:02,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461169339] [2020-11-09 13:30:02,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 13:30:02,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-09 13:30:02,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304515091] [2020-11-09 13:30:02,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-09 13:30:02,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:02,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-09 13:30:02,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-09 13:30:02,533 INFO L87 Difference]: Start difference. First operand 41 states and 96 transitions. Second operand 6 states. [2020-11-09 13:30:02,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:02,611 INFO L93 Difference]: Finished difference Result 65 states and 152 transitions. [2020-11-09 13:30:02,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-09 13:30:02,612 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-09 13:30:02,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:02,613 INFO L225 Difference]: With dead ends: 65 [2020-11-09 13:30:02,613 INFO L226 Difference]: Without dead ends: 52 [2020-11-09 13:30:02,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-09 13:30:02,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-09 13:30:02,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2020-11-09 13:30:02,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-09 13:30:02,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 99 transitions. [2020-11-09 13:30:02,621 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 99 transitions. Word has length 10 [2020-11-09 13:30:02,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:02,621 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 99 transitions. [2020-11-09 13:30:02,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-09 13:30:02,621 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 99 transitions. [2020-11-09 13:30:02,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-09 13:30:02,622 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:02,622 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:02,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-09 13:30:02,623 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:02,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:02,624 INFO L82 PathProgramCache]: Analyzing trace with hash 735328415, now seen corresponding path program 4 times [2020-11-09 13:30:02,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:02,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089713277] [2020-11-09 13:30:02,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:02,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:02,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:02,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089713277] [2020-11-09 13:30:02,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958303234] [2020-11-09 13:30:02,723 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 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 [2020-11-09 13:30:02,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:30:02,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:02,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-09 13:30:02,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:02,875 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:02,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:02,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:02,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-09 13:30:02,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418751098] [2020-11-09 13:30:02,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-09 13:30:02,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:02,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-09 13:30:02,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-09 13:30:02,893 INFO L87 Difference]: Start difference. First operand 41 states and 99 transitions. Second operand 8 states. [2020-11-09 13:30:03,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:03,163 INFO L93 Difference]: Finished difference Result 63 states and 147 transitions. [2020-11-09 13:30:03,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 13:30:03,164 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-09 13:30:03,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:03,165 INFO L225 Difference]: With dead ends: 63 [2020-11-09 13:30:03,165 INFO L226 Difference]: Without dead ends: 54 [2020-11-09 13:30:03,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-11-09 13:30:03,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-09 13:30:03,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2020-11-09 13:30:03,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-09 13:30:03,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 87 transitions. [2020-11-09 13:30:03,180 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 87 transitions. Word has length 11 [2020-11-09 13:30:03,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:03,180 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 87 transitions. [2020-11-09 13:30:03,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-09 13:30:03,181 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 87 transitions. [2020-11-09 13:30:03,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-09 13:30:03,181 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:03,182 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:03,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-09 13:30:03,398 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:03,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:03,399 INFO L82 PathProgramCache]: Analyzing trace with hash 128488628, now seen corresponding path program 5 times [2020-11-09 13:30:03,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:03,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102261184] [2020-11-09 13:30:03,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:03,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:03,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102261184] [2020-11-09 13:30:03,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305159820] [2020-11-09 13:30:03,466 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 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 [2020-11-09 13:30:03,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:03,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:03,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-09 13:30:03,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:03,577 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:03,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:03,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:03,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-09 13:30:03,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736523706] [2020-11-09 13:30:03,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-09 13:30:03,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:03,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-09 13:30:03,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-09 13:30:03,604 INFO L87 Difference]: Start difference. First operand 37 states and 87 transitions. Second operand 8 states. [2020-11-09 13:30:03,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:03,741 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-11-09 13:30:03,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-09 13:30:03,741 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-09 13:30:03,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:03,742 INFO L225 Difference]: With dead ends: 56 [2020-11-09 13:30:03,743 INFO L226 Difference]: Without dead ends: 51 [2020-11-09 13:30:03,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-11-09 13:30:03,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-09 13:30:03,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-11-09 13:30:03,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-09 13:30:03,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-11-09 13:30:03,752 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-11-09 13:30:03,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:03,752 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-11-09 13:30:03,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-09 13:30:03,752 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-11-09 13:30:03,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 13:30:03,753 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:03,753 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:03,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:03,954 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:03,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:03,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1416964401, now seen corresponding path program 6 times [2020-11-09 13:30:03,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:03,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930325183] [2020-11-09 13:30:03,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:03,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:04,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:04,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930325183] [2020-11-09 13:30:04,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815375232] [2020-11-09 13:30:04,073 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 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 [2020-11-09 13:30:04,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-09 13:30:04,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:04,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 13:30:04,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:04,152 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:04,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:04,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:04,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-09 13:30:04,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531409485] [2020-11-09 13:30:04,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-09 13:30:04,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:04,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-09 13:30:04,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-09 13:30:04,169 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-11-09 13:30:04,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:04,309 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-11-09 13:30:04,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-09 13:30:04,310 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-11-09 13:30:04,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:04,311 INFO L225 Difference]: With dead ends: 56 [2020-11-09 13:30:04,311 INFO L226 Difference]: Without dead ends: 50 [2020-11-09 13:30:04,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-11-09 13:30:04,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-09 13:30:04,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-11-09 13:30:04,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-09 13:30:04,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-11-09 13:30:04,316 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 12 [2020-11-09 13:30:04,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:04,316 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-11-09 13:30:04,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-09 13:30:04,317 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-11-09 13:30:04,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 13:30:04,318 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:04,318 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:04,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:04,529 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:04,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:04,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1320372483, now seen corresponding path program 7 times [2020-11-09 13:30:04,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:04,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951115892] [2020-11-09 13:30:04,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:04,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:04,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:04,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951115892] [2020-11-09 13:30:04,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805064869] [2020-11-09 13:30:04,663 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 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 [2020-11-09 13:30:04,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:04,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-09 13:30:04,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:04,788 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:04,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:04,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:04,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-09 13:30:04,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605320464] [2020-11-09 13:30:04,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-09 13:30:04,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:04,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-09 13:30:04,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-09 13:30:04,811 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 9 states. [2020-11-09 13:30:05,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:05,014 INFO L93 Difference]: Finished difference Result 63 states and 149 transitions. [2020-11-09 13:30:05,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-09 13:30:05,016 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-09 13:30:05,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:05,017 INFO L225 Difference]: With dead ends: 63 [2020-11-09 13:30:05,017 INFO L226 Difference]: Without dead ends: 58 [2020-11-09 13:30:05,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-11-09 13:30:05,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-09 13:30:05,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-11-09 13:30:05,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-09 13:30:05,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-11-09 13:30:05,028 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 12 [2020-11-09 13:30:05,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:05,028 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-11-09 13:30:05,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-09 13:30:05,028 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-11-09 13:30:05,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 13:30:05,030 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:05,030 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:05,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:05,243 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:05,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:05,244 INFO L82 PathProgramCache]: Analyzing trace with hash -311794613, now seen corresponding path program 8 times [2020-11-09 13:30:05,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:05,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384192875] [2020-11-09 13:30:05,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:05,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:05,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384192875] [2020-11-09 13:30:05,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136967209] [2020-11-09 13:30:05,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 13:30:05,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:05,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:05,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 13:30:05,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:05,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:05,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:05,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-09 13:30:05,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430707862] [2020-11-09 13:30:05,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-09 13:30:05,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:05,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-09 13:30:05,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-09 13:30:05,454 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 9 states. [2020-11-09 13:30:05,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:05,698 INFO L93 Difference]: Finished difference Result 71 states and 167 transitions. [2020-11-09 13:30:05,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 13:30:05,699 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-09 13:30:05,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:05,700 INFO L225 Difference]: With dead ends: 71 [2020-11-09 13:30:05,700 INFO L226 Difference]: Without dead ends: 62 [2020-11-09 13:30:05,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-11-09 13:30:05,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-09 13:30:05,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2020-11-09 13:30:05,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-09 13:30:05,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-11-09 13:30:05,713 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 12 [2020-11-09 13:30:05,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:05,714 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-11-09 13:30:05,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-09 13:30:05,714 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-11-09 13:30:05,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 13:30:05,717 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:05,717 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:05,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-09 13:30:05,929 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:05,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:05,930 INFO L82 PathProgramCache]: Analyzing trace with hash -2018100772, now seen corresponding path program 9 times [2020-11-09 13:30:05,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:05,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110716970] [2020-11-09 13:30:05,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:05,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:06,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:06,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110716970] [2020-11-09 13:30:06,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506600983] [2020-11-09 13:30:06,033 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 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 [2020-11-09 13:30:06,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-09 13:30:06,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:06,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 13:30:06,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:06,159 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:06,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:06,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:06,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-09 13:30:06,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520115531] [2020-11-09 13:30:06,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-09 13:30:06,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:06,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-09 13:30:06,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-09 13:30:06,182 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-11-09 13:30:06,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:06,523 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-11-09 13:30:06,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-09 13:30:06,524 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-09 13:30:06,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:06,525 INFO L225 Difference]: With dead ends: 72 [2020-11-09 13:30:06,525 INFO L226 Difference]: Without dead ends: 63 [2020-11-09 13:30:06,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-11-09 13:30:06,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-09 13:30:06,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-11-09 13:30:06,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-09 13:30:06,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-11-09 13:30:06,534 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 13 [2020-11-09 13:30:06,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:06,534 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-11-09 13:30:06,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-09 13:30:06,535 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-11-09 13:30:06,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 13:30:06,535 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:06,535 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:06,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:06,750 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:06,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:06,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1075670313, now seen corresponding path program 10 times [2020-11-09 13:30:06,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:06,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930585195] [2020-11-09 13:30:06,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:06,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:06,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:06,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930585195] [2020-11-09 13:30:06,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949914866] [2020-11-09 13:30:06,830 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 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 [2020-11-09 13:30:06,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:30:06,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:06,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 13:30:06,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:06,930 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:06,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:06,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:06,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-09 13:30:06,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349043137] [2020-11-09 13:30:06,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-09 13:30:06,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:06,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-09 13:30:06,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-11-09 13:30:06,951 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 10 states. [2020-11-09 13:30:07,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:07,230 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-11-09 13:30:07,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-09 13:30:07,231 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-09 13:30:07,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:07,232 INFO L225 Difference]: With dead ends: 64 [2020-11-09 13:30:07,232 INFO L226 Difference]: Without dead ends: 59 [2020-11-09 13:30:07,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-11-09 13:30:07,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-09 13:30:07,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2020-11-09 13:30:07,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-09 13:30:07,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-11-09 13:30:07,238 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-11-09 13:30:07,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:07,238 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-11-09 13:30:07,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-09 13:30:07,238 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-11-09 13:30:07,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 13:30:07,239 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:07,239 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:07,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:07,447 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:07,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:07,448 INFO L82 PathProgramCache]: Analyzing trace with hash 198162772, now seen corresponding path program 11 times [2020-11-09 13:30:07,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:07,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658507274] [2020-11-09 13:30:07,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:07,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:07,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:07,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658507274] [2020-11-09 13:30:07,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539283438] [2020-11-09 13:30:07,570 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 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 [2020-11-09 13:30:07,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-09 13:30:07,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:07,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 13:30:07,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:07,662 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:07,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:07,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:07,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-09 13:30:07,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489022941] [2020-11-09 13:30:07,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-09 13:30:07,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:07,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-09 13:30:07,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-09 13:30:07,689 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-11-09 13:30:07,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:07,888 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-11-09 13:30:07,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 13:30:07,889 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-11-09 13:30:07,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:07,890 INFO L225 Difference]: With dead ends: 64 [2020-11-09 13:30:07,890 INFO L226 Difference]: Without dead ends: 58 [2020-11-09 13:30:07,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-11-09 13:30:07,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-09 13:30:07,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-11-09 13:30:07,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-09 13:30:07,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-11-09 13:30:07,894 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 14 [2020-11-09 13:30:07,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:07,894 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-11-09 13:30:07,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-09 13:30:07,895 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-11-09 13:30:07,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 13:30:07,895 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:07,895 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:08,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-09 13:30:08,104 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:08,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:08,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1863413606, now seen corresponding path program 12 times [2020-11-09 13:30:08,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:08,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475072139] [2020-11-09 13:30:08,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:08,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:08,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:08,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475072139] [2020-11-09 13:30:08,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854971850] [2020-11-09 13:30:08,209 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 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 [2020-11-09 13:30:08,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-09 13:30:08,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:08,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 13:30:08,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:08,308 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:08,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:08,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-09 13:30:08,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186592568] [2020-11-09 13:30:08,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 13:30:08,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:08,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 13:30:08,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-09 13:30:08,329 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 11 states. [2020-11-09 13:30:08,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:08,718 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-11-09 13:30:08,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-09 13:30:08,719 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-09 13:30:08,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:08,720 INFO L225 Difference]: With dead ends: 73 [2020-11-09 13:30:08,720 INFO L226 Difference]: Without dead ends: 68 [2020-11-09 13:30:08,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-11-09 13:30:08,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-09 13:30:08,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 45. [2020-11-09 13:30:08,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-09 13:30:08,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-11-09 13:30:08,725 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 14 [2020-11-09 13:30:08,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:08,725 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-11-09 13:30:08,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 13:30:08,726 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-11-09 13:30:08,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 13:30:08,726 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:08,726 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:08,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:08,928 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:08,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:08,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1013983880, now seen corresponding path program 13 times [2020-11-09 13:30:08,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:08,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103732020] [2020-11-09 13:30:08,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:08,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:09,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103732020] [2020-11-09 13:30:09,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019175904] [2020-11-09 13:30:09,057 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 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 [2020-11-09 13:30:09,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:09,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 13:30:09,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:09,156 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:09,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:09,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:09,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-09 13:30:09,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242224543] [2020-11-09 13:30:09,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 13:30:09,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:09,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 13:30:09,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-11-09 13:30:09,174 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 11 states. [2020-11-09 13:30:09,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:09,588 INFO L93 Difference]: Finished difference Result 81 states and 191 transitions. [2020-11-09 13:30:09,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-09 13:30:09,588 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-09 13:30:09,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:09,589 INFO L225 Difference]: With dead ends: 81 [2020-11-09 13:30:09,589 INFO L226 Difference]: Without dead ends: 72 [2020-11-09 13:30:09,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-11-09 13:30:09,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-11-09 13:30:09,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-11-09 13:30:09,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-09 13:30:09,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-11-09 13:30:09,595 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 14 [2020-11-09 13:30:09,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:09,595 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-11-09 13:30:09,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 13:30:09,595 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-11-09 13:30:09,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-09 13:30:09,596 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:09,596 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:09,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-09 13:30:09,808 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:09,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:09,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1931272153, now seen corresponding path program 14 times [2020-11-09 13:30:09,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:09,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510534997] [2020-11-09 13:30:09,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:09,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:09,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:09,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510534997] [2020-11-09 13:30:09,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365693689] [2020-11-09 13:30:09,940 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 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 [2020-11-09 13:30:10,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:10,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:10,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-09 13:30:10,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:10,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:10,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:10,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-09 13:30:10,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393006019] [2020-11-09 13:30:10,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 13:30:10,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:10,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 13:30:10,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-11-09 13:30:10,066 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-11-09 13:30:10,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:10,581 INFO L93 Difference]: Finished difference Result 82 states and 193 transitions. [2020-11-09 13:30:10,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 13:30:10,582 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-11-09 13:30:10,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:10,583 INFO L225 Difference]: With dead ends: 82 [2020-11-09 13:30:10,583 INFO L226 Difference]: Without dead ends: 73 [2020-11-09 13:30:10,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-11-09 13:30:10,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-09 13:30:10,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 45. [2020-11-09 13:30:10,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-09 13:30:10,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-11-09 13:30:10,588 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 15 [2020-11-09 13:30:10,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:10,588 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-11-09 13:30:10,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 13:30:10,589 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-11-09 13:30:10,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-09 13:30:10,589 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:10,589 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:10,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-09 13:30:10,797 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:10,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:10,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1368757306, now seen corresponding path program 15 times [2020-11-09 13:30:10,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:10,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414880563] [2020-11-09 13:30:10,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:10,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:10,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:10,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414880563] [2020-11-09 13:30:10,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826483274] [2020-11-09 13:30:10,904 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 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 [2020-11-09 13:30:10,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-09 13:30:10,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:10,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 13:30:10,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:11,018 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:11,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:11,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:11,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-09 13:30:11,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263591838] [2020-11-09 13:30:11,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 13:30:11,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:11,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 13:30:11,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-11-09 13:30:11,035 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 12 states. [2020-11-09 13:30:11,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:11,440 INFO L93 Difference]: Finished difference Result 72 states and 173 transitions. [2020-11-09 13:30:11,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-09 13:30:11,442 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-11-09 13:30:11,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:11,444 INFO L225 Difference]: With dead ends: 72 [2020-11-09 13:30:11,444 INFO L226 Difference]: Without dead ends: 67 [2020-11-09 13:30:11,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-11-09 13:30:11,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-09 13:30:11,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-11-09 13:30:11,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-09 13:30:11,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-11-09 13:30:11,450 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-11-09 13:30:11,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:11,451 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-11-09 13:30:11,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 13:30:11,451 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-11-09 13:30:11,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 13:30:11,452 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:11,452 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:11,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-09 13:30:11,663 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:11,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:11,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1455869111, now seen corresponding path program 16 times [2020-11-09 13:30:11,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:11,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674244555] [2020-11-09 13:30:11,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:11,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:11,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:11,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674244555] [2020-11-09 13:30:11,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141879813] [2020-11-09 13:30:11,842 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 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 [2020-11-09 13:30:11,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:30:11,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:11,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 13:30:11,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:11,912 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:11,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:11,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:11,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-09 13:30:11,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338081326] [2020-11-09 13:30:11,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 13:30:11,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:11,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 13:30:11,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-09 13:30:11,931 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-11-09 13:30:12,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:12,179 INFO L93 Difference]: Finished difference Result 72 states and 171 transitions. [2020-11-09 13:30:12,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-09 13:30:12,180 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-11-09 13:30:12,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:12,181 INFO L225 Difference]: With dead ends: 72 [2020-11-09 13:30:12,182 INFO L226 Difference]: Without dead ends: 66 [2020-11-09 13:30:12,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2020-11-09 13:30:12,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-09 13:30:12,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-11-09 13:30:12,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-09 13:30:12,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-11-09 13:30:12,185 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 16 [2020-11-09 13:30:12,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:12,186 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-11-09 13:30:12,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 13:30:12,186 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-11-09 13:30:12,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 13:30:12,186 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:12,187 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:12,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-09 13:30:12,398 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:12,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:12,398 INFO L82 PathProgramCache]: Analyzing trace with hash -260077303, now seen corresponding path program 17 times [2020-11-09 13:30:12,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:12,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025051819] [2020-11-09 13:30:12,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:12,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:12,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:12,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025051819] [2020-11-09 13:30:12,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416467877] [2020-11-09 13:30:12,515 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 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 [2020-11-09 13:30:12,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-09 13:30:12,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:12,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-09 13:30:12,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:12,627 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:12,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:12,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:12,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-09 13:30:12,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870887190] [2020-11-09 13:30:12,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 13:30:12,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:12,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 13:30:12,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-09 13:30:12,644 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 13 states. [2020-11-09 13:30:13,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:13,157 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-11-09 13:30:13,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-09 13:30:13,158 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-11-09 13:30:13,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:13,159 INFO L225 Difference]: With dead ends: 83 [2020-11-09 13:30:13,159 INFO L226 Difference]: Without dead ends: 78 [2020-11-09 13:30:13,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-11-09 13:30:13,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-09 13:30:13,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 49. [2020-11-09 13:30:13,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-09 13:30:13,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-11-09 13:30:13,164 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 16 [2020-11-09 13:30:13,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:13,165 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-11-09 13:30:13,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 13:30:13,165 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-11-09 13:30:13,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 13:30:13,165 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:13,165 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:13,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:13,371 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:13,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:13,371 INFO L82 PathProgramCache]: Analyzing trace with hash -518171259, now seen corresponding path program 18 times [2020-11-09 13:30:13,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:13,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152462030] [2020-11-09 13:30:13,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:13,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:13,533 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:13,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152462030] [2020-11-09 13:30:13,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742557430] [2020-11-09 13:30:13,534 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 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 [2020-11-09 13:30:13,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-09 13:30:13,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:13,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-09 13:30:13,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:13,648 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:13,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:13,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:13,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-09 13:30:13,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329652492] [2020-11-09 13:30:13,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 13:30:13,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:13,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 13:30:13,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-09 13:30:13,667 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 13 states. [2020-11-09 13:30:14,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:14,214 INFO L93 Difference]: Finished difference Result 91 states and 215 transitions. [2020-11-09 13:30:14,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-09 13:30:14,215 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-11-09 13:30:14,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:14,216 INFO L225 Difference]: With dead ends: 91 [2020-11-09 13:30:14,217 INFO L226 Difference]: Without dead ends: 82 [2020-11-09 13:30:14,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-11-09 13:30:14,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-09 13:30:14,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 59. [2020-11-09 13:30:14,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-09 13:30:14,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-11-09 13:30:14,220 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 16 [2020-11-09 13:30:14,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:14,221 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-11-09 13:30:14,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 13:30:14,221 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-11-09 13:30:14,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-09 13:30:14,221 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:14,221 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:14,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:14,432 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:14,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:14,432 INFO L82 PathProgramCache]: Analyzing trace with hash 527563414, now seen corresponding path program 19 times [2020-11-09 13:30:14,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:14,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497763462] [2020-11-09 13:30:14,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:14,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:14,546 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:14,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497763462] [2020-11-09 13:30:14,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113091878] [2020-11-09 13:30:14,547 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 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 [2020-11-09 13:30:14,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:14,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 13:30:14,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:14,671 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:14,686 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:14,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:14,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-09 13:30:14,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837860841] [2020-11-09 13:30:14,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-09 13:30:14,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:14,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-09 13:30:14,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-11-09 13:30:14,688 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-11-09 13:30:15,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:15,379 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-11-09 13:30:15,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-09 13:30:15,380 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-11-09 13:30:15,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:15,381 INFO L225 Difference]: With dead ends: 92 [2020-11-09 13:30:15,381 INFO L226 Difference]: Without dead ends: 83 [2020-11-09 13:30:15,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-11-09 13:30:15,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-09 13:30:15,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2020-11-09 13:30:15,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-09 13:30:15,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-11-09 13:30:15,384 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 17 [2020-11-09 13:30:15,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:15,385 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-11-09 13:30:15,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-09 13:30:15,385 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-11-09 13:30:15,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-09 13:30:15,385 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:15,385 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:15,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:15,594 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:15,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:15,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1116588253, now seen corresponding path program 20 times [2020-11-09 13:30:15,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:15,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173011492] [2020-11-09 13:30:15,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:15,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:15,723 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:15,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173011492] [2020-11-09 13:30:15,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633262114] [2020-11-09 13:30:15,724 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 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 [2020-11-09 13:30:15,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:15,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:15,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 13:30:15,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:15,823 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:15,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:15,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:15,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-09 13:30:15,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671272783] [2020-11-09 13:30:15,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-09 13:30:15,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:15,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-09 13:30:15,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-11-09 13:30:15,850 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 14 states. [2020-11-09 13:30:16,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:16,411 INFO L93 Difference]: Finished difference Result 80 states and 193 transitions. [2020-11-09 13:30:16,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-09 13:30:16,411 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-11-09 13:30:16,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:16,412 INFO L225 Difference]: With dead ends: 80 [2020-11-09 13:30:16,412 INFO L226 Difference]: Without dead ends: 75 [2020-11-09 13:30:16,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-11-09 13:30:16,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-11-09 13:30:16,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-11-09 13:30:16,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-09 13:30:16,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-11-09 13:30:16,416 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-11-09 13:30:16,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:16,417 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-11-09 13:30:16,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-09 13:30:16,417 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-11-09 13:30:16,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-09 13:30:16,417 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:16,417 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:16,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-09 13:30:16,627 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:16,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:16,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1069116582, now seen corresponding path program 21 times [2020-11-09 13:30:16,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:16,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522957212] [2020-11-09 13:30:16,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:16,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:16,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522957212] [2020-11-09 13:30:16,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104297484] [2020-11-09 13:30:16,820 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 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 [2020-11-09 13:30:16,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-09 13:30:16,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:16,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-09 13:30:16,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:16,914 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:16,932 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:16,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:16,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-09 13:30:16,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235432489] [2020-11-09 13:30:16,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-09 13:30:16,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:16,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-09 13:30:16,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-11-09 13:30:16,935 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-11-09 13:30:17,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:17,265 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-11-09 13:30:17,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-09 13:30:17,265 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-11-09 13:30:17,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:17,267 INFO L225 Difference]: With dead ends: 80 [2020-11-09 13:30:17,267 INFO L226 Difference]: Without dead ends: 74 [2020-11-09 13:30:17,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2020-11-09 13:30:17,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-09 13:30:17,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2020-11-09 13:30:17,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-09 13:30:17,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-11-09 13:30:17,271 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 18 [2020-11-09 13:30:17,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:17,272 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-11-09 13:30:17,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-09 13:30:17,272 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-11-09 13:30:17,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-09 13:30:17,272 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:17,273 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:17,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-09 13:30:17,483 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:17,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:17,483 INFO L82 PathProgramCache]: Analyzing trace with hash -825375252, now seen corresponding path program 22 times [2020-11-09 13:30:17,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:17,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924869390] [2020-11-09 13:30:17,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:17,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:17,620 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:17,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924869390] [2020-11-09 13:30:17,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796581940] [2020-11-09 13:30:17,621 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 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 [2020-11-09 13:30:17,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:30:17,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:17,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-09 13:30:17,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:17,728 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:17,744 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:17,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:17,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-09 13:30:17,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476593143] [2020-11-09 13:30:17,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 13:30:17,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:17,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 13:30:17,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-11-09 13:30:17,746 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 15 states. [2020-11-09 13:30:18,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:18,391 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-11-09 13:30:18,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-09 13:30:18,391 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-11-09 13:30:18,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:18,392 INFO L225 Difference]: With dead ends: 93 [2020-11-09 13:30:18,392 INFO L226 Difference]: Without dead ends: 88 [2020-11-09 13:30:18,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-11-09 13:30:18,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-09 13:30:18,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 53. [2020-11-09 13:30:18,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-09 13:30:18,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-11-09 13:30:18,396 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 18 [2020-11-09 13:30:18,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:18,396 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-11-09 13:30:18,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 13:30:18,397 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-11-09 13:30:18,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-09 13:30:18,397 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:18,397 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:18,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-09 13:30:18,606 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:18,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:18,606 INFO L82 PathProgramCache]: Analyzing trace with hash 254522690, now seen corresponding path program 23 times [2020-11-09 13:30:18,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:18,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633012416] [2020-11-09 13:30:18,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:18,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:18,750 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:18,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633012416] [2020-11-09 13:30:18,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906251898] [2020-11-09 13:30:18,751 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 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 [2020-11-09 13:30:18,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-09 13:30:18,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:18,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-09 13:30:18,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:18,858 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:18,880 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:18,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:18,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-09 13:30:18,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38802525] [2020-11-09 13:30:18,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 13:30:18,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:18,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 13:30:18,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-11-09 13:30:18,883 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 15 states. [2020-11-09 13:30:19,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:19,614 INFO L93 Difference]: Finished difference Result 101 states and 239 transitions. [2020-11-09 13:30:19,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-09 13:30:19,615 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-11-09 13:30:19,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:19,616 INFO L225 Difference]: With dead ends: 101 [2020-11-09 13:30:19,617 INFO L226 Difference]: Without dead ends: 92 [2020-11-09 13:30:19,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-11-09 13:30:19,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-11-09 13:30:19,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-11-09 13:30:19,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-09 13:30:19,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-11-09 13:30:19,621 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 18 [2020-11-09 13:30:19,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:19,621 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-11-09 13:30:19,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 13:30:19,621 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-11-09 13:30:19,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-09 13:30:19,622 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:19,622 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:19,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-09 13:30:19,831 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:19,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:19,831 INFO L82 PathProgramCache]: Analyzing trace with hash 183196179, now seen corresponding path program 24 times [2020-11-09 13:30:19,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:19,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662037355] [2020-11-09 13:30:19,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:19,986 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:19,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662037355] [2020-11-09 13:30:19,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227782602] [2020-11-09 13:30:19,987 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 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 [2020-11-09 13:30:20,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-09 13:30:20,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:20,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-09 13:30:20,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:20,097 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:20,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:20,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-09 13:30:20,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007116378] [2020-11-09 13:30:20,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-09 13:30:20,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:20,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-09 13:30:20,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-11-09 13:30:20,115 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-11-09 13:30:20,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:20,868 INFO L93 Difference]: Finished difference Result 102 states and 241 transitions. [2020-11-09 13:30:20,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-09 13:30:20,869 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-11-09 13:30:20,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:20,870 INFO L225 Difference]: With dead ends: 102 [2020-11-09 13:30:20,870 INFO L226 Difference]: Without dead ends: 93 [2020-11-09 13:30:20,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-11-09 13:30:20,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-09 13:30:20,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2020-11-09 13:30:20,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-09 13:30:20,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-11-09 13:30:20,875 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 19 [2020-11-09 13:30:20,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:20,875 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-11-09 13:30:20,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-09 13:30:20,875 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-11-09 13:30:20,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-09 13:30:20,875 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:20,875 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:21,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-09 13:30:21,086 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:21,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:21,086 INFO L82 PathProgramCache]: Analyzing trace with hash -699703104, now seen corresponding path program 25 times [2020-11-09 13:30:21,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:21,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785095037] [2020-11-09 13:30:21,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:21,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:21,236 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:21,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785095037] [2020-11-09 13:30:21,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917049441] [2020-11-09 13:30:21,237 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 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 [2020-11-09 13:30:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:21,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-09 13:30:21,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:21,344 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:21,360 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:21,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:21,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-09 13:30:21,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881808579] [2020-11-09 13:30:21,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-09 13:30:21,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:21,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-09 13:30:21,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-11-09 13:30:21,362 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 16 states. [2020-11-09 13:30:22,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:22,089 INFO L93 Difference]: Finished difference Result 88 states and 213 transitions. [2020-11-09 13:30:22,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-09 13:30:22,089 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-11-09 13:30:22,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:22,090 INFO L225 Difference]: With dead ends: 88 [2020-11-09 13:30:22,090 INFO L226 Difference]: Without dead ends: 83 [2020-11-09 13:30:22,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-11-09 13:30:22,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-09 13:30:22,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2020-11-09 13:30:22,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-09 13:30:22,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-11-09 13:30:22,094 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-11-09 13:30:22,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:22,094 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-11-09 13:30:22,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-09 13:30:22,094 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-11-09 13:30:22,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-09 13:30:22,095 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:22,095 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:22,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:22,296 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:22,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:22,297 INFO L82 PathProgramCache]: Analyzing trace with hash -923845315, now seen corresponding path program 26 times [2020-11-09 13:30:22,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:22,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970688381] [2020-11-09 13:30:22,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:22,531 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:22,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970688381] [2020-11-09 13:30:22,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007507832] [2020-11-09 13:30:22,532 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 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 [2020-11-09 13:30:22,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:22,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:22,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-09 13:30:22,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:22,608 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:22,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:22,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-09 13:30:22,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021704317] [2020-11-09 13:30:22,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-09 13:30:22,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:22,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-09 13:30:22,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-11-09 13:30:22,623 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-11-09 13:30:22,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:22,999 INFO L93 Difference]: Finished difference Result 88 states and 211 transitions. [2020-11-09 13:30:22,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-09 13:30:22,999 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-11-09 13:30:23,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:23,001 INFO L225 Difference]: With dead ends: 88 [2020-11-09 13:30:23,001 INFO L226 Difference]: Without dead ends: 82 [2020-11-09 13:30:23,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2020-11-09 13:30:23,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-09 13:30:23,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 70. [2020-11-09 13:30:23,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-09 13:30:23,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-11-09 13:30:23,005 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 20 [2020-11-09 13:30:23,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:23,005 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-11-09 13:30:23,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-09 13:30:23,005 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-11-09 13:30:23,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-09 13:30:23,006 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:23,006 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:23,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-09 13:30:23,215 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:23,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:23,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1384142351, now seen corresponding path program 27 times [2020-11-09 13:30:23,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:23,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466688973] [2020-11-09 13:30:23,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:23,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:23,370 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:23,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466688973] [2020-11-09 13:30:23,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26203302] [2020-11-09 13:30:23,371 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 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 [2020-11-09 13:30:23,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-09 13:30:23,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:23,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-09 13:30:23,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:23,489 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:23,505 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:23,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:23,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-09 13:30:23,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242972611] [2020-11-09 13:30:23,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 13:30:23,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:23,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 13:30:23,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-11-09 13:30:23,506 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 17 states. [2020-11-09 13:30:24,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:24,299 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-11-09 13:30:24,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-09 13:30:24,300 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-11-09 13:30:24,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:24,301 INFO L225 Difference]: With dead ends: 103 [2020-11-09 13:30:24,301 INFO L226 Difference]: Without dead ends: 98 [2020-11-09 13:30:24,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-11-09 13:30:24,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-09 13:30:24,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 57. [2020-11-09 13:30:24,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-09 13:30:24,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2020-11-09 13:30:24,311 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 20 [2020-11-09 13:30:24,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:24,311 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2020-11-09 13:30:24,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 13:30:24,311 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2020-11-09 13:30:24,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-09 13:30:24,312 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:24,312 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:24,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-09 13:30:24,524 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:24,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:24,524 INFO L82 PathProgramCache]: Analyzing trace with hash -215934529, now seen corresponding path program 28 times [2020-11-09 13:30:24,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:24,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260111983] [2020-11-09 13:30:24,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:24,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:24,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260111983] [2020-11-09 13:30:24,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471268732] [2020-11-09 13:30:24,696 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 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 [2020-11-09 13:30:24,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:30:24,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:24,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-09 13:30:24,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:24,814 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:24,831 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:24,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:24,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-09 13:30:24,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235523082] [2020-11-09 13:30:24,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 13:30:24,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:24,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 13:30:24,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-11-09 13:30:24,834 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand 17 states. [2020-11-09 13:30:25,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:25,775 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-11-09 13:30:25,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-09 13:30:25,775 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-11-09 13:30:25,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:25,777 INFO L225 Difference]: With dead ends: 111 [2020-11-09 13:30:25,777 INFO L226 Difference]: Without dead ends: 102 [2020-11-09 13:30:25,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-11-09 13:30:25,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-11-09 13:30:25,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2020-11-09 13:30:25,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-09 13:30:25,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-11-09 13:30:25,782 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 20 [2020-11-09 13:30:25,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:25,782 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-11-09 13:30:25,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 13:30:25,782 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-11-09 13:30:25,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-09 13:30:25,783 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:25,783 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:25,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:25,995 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:25,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:25,996 INFO L82 PathProgramCache]: Analyzing trace with hash -41234864, now seen corresponding path program 29 times [2020-11-09 13:30:25,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:25,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130609721] [2020-11-09 13:30:25,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:26,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:26,165 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:26,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130609721] [2020-11-09 13:30:26,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419253128] [2020-11-09 13:30:26,165 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 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 [2020-11-09 13:30:26,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-09 13:30:26,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:26,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-09 13:30:26,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:26,283 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:26,301 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:26,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:26,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-09 13:30:26,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437633659] [2020-11-09 13:30:26,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-09 13:30:26,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:26,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-09 13:30:26,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-11-09 13:30:26,303 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-11-09 13:30:27,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:27,222 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2020-11-09 13:30:27,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-09 13:30:27,223 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-11-09 13:30:27,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:27,224 INFO L225 Difference]: With dead ends: 112 [2020-11-09 13:30:27,224 INFO L226 Difference]: Without dead ends: 103 [2020-11-09 13:30:27,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-11-09 13:30:27,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-09 13:30:27,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 57. [2020-11-09 13:30:27,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-09 13:30:27,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2020-11-09 13:30:27,229 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 21 [2020-11-09 13:30:27,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:27,229 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2020-11-09 13:30:27,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-09 13:30:27,229 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2020-11-09 13:30:27,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-09 13:30:27,230 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:27,230 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:27,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:27,440 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:27,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:27,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1895992291, now seen corresponding path program 30 times [2020-11-09 13:30:27,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:27,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025832153] [2020-11-09 13:30:27,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:27,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:27,643 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:27,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025832153] [2020-11-09 13:30:27,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096550449] [2020-11-09 13:30:27,644 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 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 [2020-11-09 13:30:27,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-09 13:30:27,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:27,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-09 13:30:27,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:27,762 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:27,778 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:27,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:27,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-09 13:30:27,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223590536] [2020-11-09 13:30:27,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-09 13:30:27,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:27,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-09 13:30:27,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-11-09 13:30:27,780 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand 18 states. [2020-11-09 13:30:28,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:28,707 INFO L93 Difference]: Finished difference Result 96 states and 233 transitions. [2020-11-09 13:30:28,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-09 13:30:28,709 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-11-09 13:30:28,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:28,711 INFO L225 Difference]: With dead ends: 96 [2020-11-09 13:30:28,711 INFO L226 Difference]: Without dead ends: 91 [2020-11-09 13:30:28,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-11-09 13:30:28,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-11-09 13:30:28,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2020-11-09 13:30:28,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-09 13:30:28,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-11-09 13:30:28,714 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-11-09 13:30:28,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:28,714 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-11-09 13:30:28,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-09 13:30:28,715 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-11-09 13:30:28,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-09 13:30:28,715 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:28,715 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:28,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-11-09 13:30:28,916 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:28,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:28,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1242888800, now seen corresponding path program 31 times [2020-11-09 13:30:28,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:28,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102183672] [2020-11-09 13:30:28,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:28,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:29,215 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:29,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102183672] [2020-11-09 13:30:29,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330369712] [2020-11-09 13:30:29,215 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 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 [2020-11-09 13:30:29,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:29,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-09 13:30:29,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:29,292 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:29,316 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:29,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:29,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-11-09 13:30:29,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623628829] [2020-11-09 13:30:29,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-09 13:30:29,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:29,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-09 13:30:29,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-11-09 13:30:29,319 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-11-09 13:30:29,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:29,761 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-11-09 13:30:29,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 13:30:29,762 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-11-09 13:30:29,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:29,763 INFO L225 Difference]: With dead ends: 96 [2020-11-09 13:30:29,763 INFO L226 Difference]: Without dead ends: 90 [2020-11-09 13:30:29,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=352, Invalid=704, Unknown=0, NotChecked=0, Total=1056 [2020-11-09 13:30:29,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-09 13:30:29,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2020-11-09 13:30:29,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-09 13:30:29,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-11-09 13:30:29,767 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 22 [2020-11-09 13:30:29,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:29,768 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-11-09 13:30:29,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-09 13:30:29,768 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-11-09 13:30:29,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-09 13:30:29,768 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:29,769 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:29,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:29,979 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:29,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:29,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1278252686, now seen corresponding path program 32 times [2020-11-09 13:30:29,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:29,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889236029] [2020-11-09 13:30:29,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:30,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889236029] [2020-11-09 13:30:30,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701192929] [2020-11-09 13:30:30,178 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 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 [2020-11-09 13:30:30,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:30,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:30,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-09 13:30:30,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:30,287 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:30,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:30,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-09 13:30:30,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153396440] [2020-11-09 13:30:30,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-09 13:30:30,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:30,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-09 13:30:30,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-11-09 13:30:30,309 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 19 states. [2020-11-09 13:30:31,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:31,363 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-11-09 13:30:31,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-09 13:30:31,364 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-11-09 13:30:31,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:31,365 INFO L225 Difference]: With dead ends: 113 [2020-11-09 13:30:31,365 INFO L226 Difference]: Without dead ends: 108 [2020-11-09 13:30:31,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-11-09 13:30:31,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-11-09 13:30:31,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 61. [2020-11-09 13:30:31,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-09 13:30:31,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-11-09 13:30:31,370 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 22 [2020-11-09 13:30:31,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:31,370 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-11-09 13:30:31,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-09 13:30:31,370 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-11-09 13:30:31,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-09 13:30:31,371 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:31,371 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:31,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-11-09 13:30:31,572 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:31,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:31,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1353755908, now seen corresponding path program 33 times [2020-11-09 13:30:31,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:31,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15088053] [2020-11-09 13:30:31,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:31,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:31,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15088053] [2020-11-09 13:30:31,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193424500] [2020-11-09 13:30:31,767 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 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 [2020-11-09 13:30:31,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-09 13:30:31,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:31,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-09 13:30:31,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:31,893 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:31,909 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:31,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:31,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-09 13:30:31,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123423139] [2020-11-09 13:30:31,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-09 13:30:31,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:31,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-09 13:30:31,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-11-09 13:30:31,911 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 19 states. [2020-11-09 13:30:33,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:33,069 INFO L93 Difference]: Finished difference Result 121 states and 287 transitions. [2020-11-09 13:30:33,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-09 13:30:33,070 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-11-09 13:30:33,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:33,071 INFO L225 Difference]: With dead ends: 121 [2020-11-09 13:30:33,071 INFO L226 Difference]: Without dead ends: 112 [2020-11-09 13:30:33,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-11-09 13:30:33,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-09 13:30:33,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 77. [2020-11-09 13:30:33,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-09 13:30:33,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-11-09 13:30:33,076 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 22 [2020-11-09 13:30:33,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:33,076 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-11-09 13:30:33,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-09 13:30:33,076 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-11-09 13:30:33,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-09 13:30:33,077 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:33,077 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:33,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:33,286 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:33,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:33,287 INFO L82 PathProgramCache]: Analyzing trace with hash -971102387, now seen corresponding path program 34 times [2020-11-09 13:30:33,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:33,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668769249] [2020-11-09 13:30:33,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:33,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668769249] [2020-11-09 13:30:33,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415194108] [2020-11-09 13:30:33,506 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 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 [2020-11-09 13:30:33,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:30:33,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:33,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-09 13:30:33,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:33,614 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:33,635 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:33,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:33,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-09 13:30:33,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377079279] [2020-11-09 13:30:33,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-09 13:30:33,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:33,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-09 13:30:33,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-11-09 13:30:33,638 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-11-09 13:30:34,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:34,794 INFO L93 Difference]: Finished difference Result 122 states and 289 transitions. [2020-11-09 13:30:34,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-09 13:30:34,794 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-11-09 13:30:34,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:34,795 INFO L225 Difference]: With dead ends: 122 [2020-11-09 13:30:34,795 INFO L226 Difference]: Without dead ends: 113 [2020-11-09 13:30:34,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-11-09 13:30:34,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-11-09 13:30:34,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 61. [2020-11-09 13:30:34,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-09 13:30:34,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-11-09 13:30:34,801 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 23 [2020-11-09 13:30:34,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:34,802 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-11-09 13:30:34,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-09 13:30:34,802 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-11-09 13:30:34,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-09 13:30:34,802 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:34,802 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:35,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-09 13:30:35,011 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:35,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:35,012 INFO L82 PathProgramCache]: Analyzing trace with hash 983267910, now seen corresponding path program 35 times [2020-11-09 13:30:35,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:35,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924396747] [2020-11-09 13:30:35,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:35,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:35,247 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:35,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924396747] [2020-11-09 13:30:35,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183432185] [2020-11-09 13:30:35,248 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 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 [2020-11-09 13:30:35,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-09 13:30:35,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:35,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-09 13:30:35,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:35,370 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:35,387 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:35,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:35,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-09 13:30:35,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159785377] [2020-11-09 13:30:35,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-09 13:30:35,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:35,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-09 13:30:35,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-11-09 13:30:35,389 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 20 states. [2020-11-09 13:30:36,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:36,522 INFO L93 Difference]: Finished difference Result 104 states and 253 transitions. [2020-11-09 13:30:36,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-09 13:30:36,523 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-11-09 13:30:36,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:36,524 INFO L225 Difference]: With dead ends: 104 [2020-11-09 13:30:36,524 INFO L226 Difference]: Without dead ends: 99 [2020-11-09 13:30:36,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-11-09 13:30:36,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-09 13:30:36,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 79. [2020-11-09 13:30:36,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-09 13:30:36,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-11-09 13:30:36,529 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-11-09 13:30:36,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:36,530 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-11-09 13:30:36,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-09 13:30:36,530 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-11-09 13:30:36,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-09 13:30:36,530 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:36,531 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:36,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-11-09 13:30:36,741 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:36,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:36,742 INFO L82 PathProgramCache]: Analyzing trace with hash 415234755, now seen corresponding path program 36 times [2020-11-09 13:30:36,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:36,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798699133] [2020-11-09 13:30:36,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:37,086 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:37,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798699133] [2020-11-09 13:30:37,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451419577] [2020-11-09 13:30:37,086 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 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 [2020-11-09 13:30:37,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-09 13:30:37,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:37,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-09 13:30:37,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:37,173 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:37,204 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:37,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:37,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-11-09 13:30:37,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436621146] [2020-11-09 13:30:37,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-09 13:30:37,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:37,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-09 13:30:37,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-11-09 13:30:37,208 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-11-09 13:30:37,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:37,745 INFO L93 Difference]: Finished difference Result 104 states and 251 transitions. [2020-11-09 13:30:37,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-09 13:30:37,746 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-11-09 13:30:37,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:37,747 INFO L225 Difference]: With dead ends: 104 [2020-11-09 13:30:37,747 INFO L226 Difference]: Without dead ends: 98 [2020-11-09 13:30:37,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2020-11-09 13:30:37,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-09 13:30:37,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2020-11-09 13:30:37,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-11-09 13:30:37,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-11-09 13:30:37,752 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 24 [2020-11-09 13:30:37,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:37,752 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-11-09 13:30:37,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-09 13:30:37,752 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-11-09 13:30:37,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-09 13:30:37,753 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:37,753 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:37,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-09 13:30:37,964 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:37,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:37,964 INFO L82 PathProgramCache]: Analyzing trace with hash -39374827, now seen corresponding path program 37 times [2020-11-09 13:30:37,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:37,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527215291] [2020-11-09 13:30:37,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:38,215 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:38,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527215291] [2020-11-09 13:30:38,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803582648] [2020-11-09 13:30:38,216 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 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 [2020-11-09 13:30:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:38,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-09 13:30:38,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:38,332 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:38,355 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:38,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:38,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-09 13:30:38,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701185212] [2020-11-09 13:30:38,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-09 13:30:38,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:38,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-09 13:30:38,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-11-09 13:30:38,358 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 21 states. [2020-11-09 13:30:39,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:39,623 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-11-09 13:30:39,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-09 13:30:39,624 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-11-09 13:30:39,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:39,625 INFO L225 Difference]: With dead ends: 123 [2020-11-09 13:30:39,625 INFO L226 Difference]: Without dead ends: 118 [2020-11-09 13:30:39,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-11-09 13:30:39,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-11-09 13:30:39,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 65. [2020-11-09 13:30:39,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-09 13:30:39,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2020-11-09 13:30:39,629 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 24 [2020-11-09 13:30:39,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:39,629 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2020-11-09 13:30:39,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-09 13:30:39,630 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2020-11-09 13:30:39,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-09 13:30:39,630 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:39,630 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:39,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-09 13:30:39,841 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:39,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:39,841 INFO L82 PathProgramCache]: Analyzing trace with hash 416559353, now seen corresponding path program 38 times [2020-11-09 13:30:39,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:39,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789010410] [2020-11-09 13:30:39,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:39,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:40,070 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:40,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789010410] [2020-11-09 13:30:40,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845820299] [2020-11-09 13:30:40,070 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 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 [2020-11-09 13:30:40,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:40,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:40,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-09 13:30:40,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:40,201 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:40,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:40,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-09 13:30:40,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533572549] [2020-11-09 13:30:40,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-09 13:30:40,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:40,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-09 13:30:40,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-11-09 13:30:40,203 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand 21 states. [2020-11-09 13:30:41,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:41,419 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-11-09 13:30:41,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-09 13:30:41,420 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-11-09 13:30:41,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:41,421 INFO L225 Difference]: With dead ends: 131 [2020-11-09 13:30:41,422 INFO L226 Difference]: Without dead ends: 122 [2020-11-09 13:30:41,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2020-11-09 13:30:41,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-11-09 13:30:41,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 83. [2020-11-09 13:30:41,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-09 13:30:41,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-11-09 13:30:41,425 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 24 [2020-11-09 13:30:41,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:41,426 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-11-09 13:30:41,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-09 13:30:41,426 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-11-09 13:30:41,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-09 13:30:41,426 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:41,426 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:41,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-09 13:30:41,628 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:41,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:41,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1220594422, now seen corresponding path program 39 times [2020-11-09 13:30:41,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:41,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8239840] [2020-11-09 13:30:41,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:41,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:41,869 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:41,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8239840] [2020-11-09 13:30:41,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698983043] [2020-11-09 13:30:41,870 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 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 [2020-11-09 13:30:41,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-09 13:30:41,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:41,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-09 13:30:41,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:42,012 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:42,030 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:42,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:42,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-09 13:30:42,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500943838] [2020-11-09 13:30:42,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-09 13:30:42,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:42,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-09 13:30:42,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-11-09 13:30:42,032 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-11-09 13:30:43,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:43,499 INFO L93 Difference]: Finished difference Result 132 states and 313 transitions. [2020-11-09 13:30:43,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-09 13:30:43,499 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-11-09 13:30:43,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:43,501 INFO L225 Difference]: With dead ends: 132 [2020-11-09 13:30:43,501 INFO L226 Difference]: Without dead ends: 123 [2020-11-09 13:30:43,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-11-09 13:30:43,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-09 13:30:43,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 65. [2020-11-09 13:30:43,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-09 13:30:43,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2020-11-09 13:30:43,505 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 25 [2020-11-09 13:30:43,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:43,505 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2020-11-09 13:30:43,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-09 13:30:43,505 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2020-11-09 13:30:43,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-09 13:30:43,506 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:43,506 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:43,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-11-09 13:30:43,717 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:43,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:43,717 INFO L82 PathProgramCache]: Analyzing trace with hash 28466153, now seen corresponding path program 40 times [2020-11-09 13:30:43,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:43,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498561102] [2020-11-09 13:30:43,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:43,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498561102] [2020-11-09 13:30:43,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297583321] [2020-11-09 13:30:43,999 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 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 [2020-11-09 13:30:44,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:30:44,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:44,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-09 13:30:44,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:44,111 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:44,132 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:44,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:44,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-09 13:30:44,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286001386] [2020-11-09 13:30:44,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-09 13:30:44,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:44,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-09 13:30:44,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-11-09 13:30:44,134 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand 22 states. [2020-11-09 13:30:45,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:45,501 INFO L93 Difference]: Finished difference Result 112 states and 273 transitions. [2020-11-09 13:30:45,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-09 13:30:45,502 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-11-09 13:30:45,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:45,504 INFO L225 Difference]: With dead ends: 112 [2020-11-09 13:30:45,504 INFO L226 Difference]: Without dead ends: 107 [2020-11-09 13:30:45,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-11-09 13:30:45,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-11-09 13:30:45,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2020-11-09 13:30:45,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-09 13:30:45,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-11-09 13:30:45,508 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-11-09 13:30:45,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:45,509 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-11-09 13:30:45,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-09 13:30:45,509 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-11-09 13:30:45,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-09 13:30:45,509 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:45,510 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:45,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-11-09 13:30:45,720 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:45,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:45,720 INFO L82 PathProgramCache]: Analyzing trace with hash -391352730, now seen corresponding path program 41 times [2020-11-09 13:30:45,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:45,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713542125] [2020-11-09 13:30:45,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:46,119 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:46,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713542125] [2020-11-09 13:30:46,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334482031] [2020-11-09 13:30:46,119 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 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 [2020-11-09 13:30:46,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-09 13:30:46,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:46,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-09 13:30:46,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:46,206 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:46,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:46,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-11-09 13:30:46,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969122979] [2020-11-09 13:30:46,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-09 13:30:46,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:46,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-09 13:30:46,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-11-09 13:30:46,225 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-11-09 13:30:46,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:46,894 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-11-09 13:30:46,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-09 13:30:46,894 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-11-09 13:30:46,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:46,896 INFO L225 Difference]: With dead ends: 112 [2020-11-09 13:30:46,896 INFO L226 Difference]: Without dead ends: 106 [2020-11-09 13:30:46,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=540, Invalid=1100, Unknown=0, NotChecked=0, Total=1640 [2020-11-09 13:30:46,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-11-09 13:30:46,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2020-11-09 13:30:46,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-09 13:30:46,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 223 transitions. [2020-11-09 13:30:46,901 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 223 transitions. Word has length 26 [2020-11-09 13:30:46,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:46,901 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 223 transitions. [2020-11-09 13:30:46,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-09 13:30:46,902 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 223 transitions. [2020-11-09 13:30:46,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-09 13:30:46,902 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:46,902 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:47,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:47,113 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:47,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:47,113 INFO L82 PathProgramCache]: Analyzing trace with hash 816306680, now seen corresponding path program 42 times [2020-11-09 13:30:47,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:47,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745588558] [2020-11-09 13:30:47,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:47,419 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:47,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745588558] [2020-11-09 13:30:47,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333748811] [2020-11-09 13:30:47,420 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 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 [2020-11-09 13:30:47,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-09 13:30:47,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:47,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-09 13:30:47,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:47,542 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:47,566 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:47,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:47,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-09 13:30:47,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614660798] [2020-11-09 13:30:47,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-09 13:30:47,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:47,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-09 13:30:47,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-11-09 13:30:47,568 INFO L87 Difference]: Start difference. First operand 88 states and 223 transitions. Second operand 23 states. [2020-11-09 13:30:49,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:49,054 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-11-09 13:30:49,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-09 13:30:49,055 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-11-09 13:30:49,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:49,057 INFO L225 Difference]: With dead ends: 133 [2020-11-09 13:30:49,057 INFO L226 Difference]: Without dead ends: 128 [2020-11-09 13:30:49,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-11-09 13:30:49,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-11-09 13:30:49,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 69. [2020-11-09 13:30:49,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-09 13:30:49,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 167 transitions. [2020-11-09 13:30:49,062 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 167 transitions. Word has length 26 [2020-11-09 13:30:49,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:49,062 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 167 transitions. [2020-11-09 13:30:49,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-09 13:30:49,063 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 167 transitions. [2020-11-09 13:30:49,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-09 13:30:49,063 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:49,063 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:49,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-11-09 13:30:49,275 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:49,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:49,275 INFO L82 PathProgramCache]: Analyzing trace with hash 882475958, now seen corresponding path program 43 times [2020-11-09 13:30:49,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:49,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636306761] [2020-11-09 13:30:49,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:49,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:49,569 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:49,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636306761] [2020-11-09 13:30:49,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630137199] [2020-11-09 13:30:49,570 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 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 [2020-11-09 13:30:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:49,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-09 13:30:49,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:49,689 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:49,709 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:49,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:49,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-09 13:30:49,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860908937] [2020-11-09 13:30:49,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-09 13:30:49,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:49,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-09 13:30:49,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-11-09 13:30:49,711 INFO L87 Difference]: Start difference. First operand 69 states and 167 transitions. Second operand 23 states. [2020-11-09 13:30:51,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:51,285 INFO L93 Difference]: Finished difference Result 141 states and 335 transitions. [2020-11-09 13:30:51,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-09 13:30:51,286 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-11-09 13:30:51,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:51,287 INFO L225 Difference]: With dead ends: 141 [2020-11-09 13:30:51,287 INFO L226 Difference]: Without dead ends: 132 [2020-11-09 13:30:51,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-11-09 13:30:51,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-11-09 13:30:51,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 89. [2020-11-09 13:30:51,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-09 13:30:51,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-11-09 13:30:51,293 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 26 [2020-11-09 13:30:51,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:51,294 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-11-09 13:30:51,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-09 13:30:51,294 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-11-09 13:30:51,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-09 13:30:51,294 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:51,294 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:51,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:51,507 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:51,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:51,508 INFO L82 PathProgramCache]: Analyzing trace with hash -464271481, now seen corresponding path program 44 times [2020-11-09 13:30:51,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:51,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815853405] [2020-11-09 13:30:51,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:51,835 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:51,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815853405] [2020-11-09 13:30:51,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005496766] [2020-11-09 13:30:51,836 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 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 [2020-11-09 13:30:51,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:51,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:51,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-09 13:30:51,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:51,959 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:51,978 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:51,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:51,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-09 13:30:51,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253661040] [2020-11-09 13:30:51,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-09 13:30:51,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:51,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-09 13:30:51,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-11-09 13:30:51,980 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-11-09 13:30:53,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:53,628 INFO L93 Difference]: Finished difference Result 142 states and 337 transitions. [2020-11-09 13:30:53,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-09 13:30:53,629 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-11-09 13:30:53,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:53,630 INFO L225 Difference]: With dead ends: 142 [2020-11-09 13:30:53,630 INFO L226 Difference]: Without dead ends: 133 [2020-11-09 13:30:53,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-11-09 13:30:53,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-11-09 13:30:53,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 69. [2020-11-09 13:30:53,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-09 13:30:53,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 167 transitions. [2020-11-09 13:30:53,636 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 167 transitions. Word has length 27 [2020-11-09 13:30:53,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:53,636 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 167 transitions. [2020-11-09 13:30:53,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-09 13:30:53,636 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 167 transitions. [2020-11-09 13:30:53,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-09 13:30:53,637 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:53,637 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:53,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-11-09 13:30:53,849 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:53,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:53,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1586979020, now seen corresponding path program 45 times [2020-11-09 13:30:53,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:53,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205776054] [2020-11-09 13:30:53,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:54,157 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:54,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205776054] [2020-11-09 13:30:54,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646389188] [2020-11-09 13:30:54,158 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 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 [2020-11-09 13:30:54,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-09 13:30:54,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:54,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-09 13:30:54,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:54,281 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:54,304 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:54,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:54,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-09 13:30:54,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295887418] [2020-11-09 13:30:54,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-09 13:30:54,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:54,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-09 13:30:54,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-11-09 13:30:54,307 INFO L87 Difference]: Start difference. First operand 69 states and 167 transitions. Second operand 24 states. [2020-11-09 13:30:55,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:55,950 INFO L93 Difference]: Finished difference Result 120 states and 293 transitions. [2020-11-09 13:30:55,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-09 13:30:55,951 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-11-09 13:30:55,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:55,953 INFO L225 Difference]: With dead ends: 120 [2020-11-09 13:30:55,953 INFO L226 Difference]: Without dead ends: 115 [2020-11-09 13:30:55,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-11-09 13:30:55,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-11-09 13:30:55,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2020-11-09 13:30:55,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-09 13:30:55,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-11-09 13:30:55,957 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-11-09 13:30:55,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:55,957 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-11-09 13:30:55,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-09 13:30:55,958 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-11-09 13:30:55,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-09 13:30:55,958 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:55,958 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:56,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:56,169 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:56,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:56,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1867154761, now seen corresponding path program 46 times [2020-11-09 13:30:56,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:56,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667116742] [2020-11-09 13:30:56,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:56,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:56,616 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:56,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667116742] [2020-11-09 13:30:56,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271419652] [2020-11-09 13:30:56,617 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 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 [2020-11-09 13:30:56,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:30:56,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:56,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-09 13:30:56,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:56,699 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:56,712 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:56,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:56,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-09 13:30:56,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857331761] [2020-11-09 13:30:56,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-09 13:30:56,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:56,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-09 13:30:56,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-11-09 13:30:56,714 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-11-09 13:30:57,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:57,410 INFO L93 Difference]: Finished difference Result 120 states and 291 transitions. [2020-11-09 13:30:57,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-09 13:30:57,411 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-11-09 13:30:57,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:57,412 INFO L225 Difference]: With dead ends: 120 [2020-11-09 13:30:57,412 INFO L226 Difference]: Without dead ends: 114 [2020-11-09 13:30:57,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=649, Invalid=1331, Unknown=0, NotChecked=0, Total=1980 [2020-11-09 13:30:57,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-11-09 13:30:57,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 94. [2020-11-09 13:30:57,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-09 13:30:57,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 239 transitions. [2020-11-09 13:30:57,416 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 239 transitions. Word has length 28 [2020-11-09 13:30:57,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:57,416 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 239 transitions. [2020-11-09 13:30:57,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-09 13:30:57,417 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 239 transitions. [2020-11-09 13:30:57,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-09 13:30:57,417 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:57,417 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:57,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-11-09 13:30:57,625 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:57,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:57,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1507485925, now seen corresponding path program 47 times [2020-11-09 13:30:57,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:57,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861550588] [2020-11-09 13:30:57,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:57,977 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:57,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861550588] [2020-11-09 13:30:57,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110776740] [2020-11-09 13:30:57,978 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 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 [2020-11-09 13:30:58,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-09 13:30:58,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:58,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-09 13:30:58,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:58,102 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:58,132 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:58,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:58,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-09 13:30:58,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665544707] [2020-11-09 13:30:58,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-09 13:30:58,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:58,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-09 13:30:58,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-11-09 13:30:58,134 INFO L87 Difference]: Start difference. First operand 94 states and 239 transitions. Second operand 25 states. [2020-11-09 13:30:59,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:59,899 INFO L93 Difference]: Finished difference Result 143 states and 341 transitions. [2020-11-09 13:30:59,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-09 13:30:59,900 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-11-09 13:30:59,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:59,901 INFO L225 Difference]: With dead ends: 143 [2020-11-09 13:30:59,901 INFO L226 Difference]: Without dead ends: 138 [2020-11-09 13:30:59,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1390, Invalid=2900, Unknown=0, NotChecked=0, Total=4290 [2020-11-09 13:30:59,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-11-09 13:30:59,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 73. [2020-11-09 13:30:59,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-09 13:30:59,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 177 transitions. [2020-11-09 13:30:59,906 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 177 transitions. Word has length 28 [2020-11-09 13:30:59,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:59,906 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 177 transitions. [2020-11-09 13:30:59,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-09 13:30:59,906 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 177 transitions. [2020-11-09 13:30:59,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-09 13:30:59,907 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:59,907 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:00,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-09 13:31:00,113 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:00,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:00,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1951734579, now seen corresponding path program 48 times [2020-11-09 13:31:00,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:00,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258930949] [2020-11-09 13:31:00,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:00,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:00,486 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:00,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258930949] [2020-11-09 13:31:00,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487451139] [2020-11-09 13:31:00,487 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 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 [2020-11-09 13:31:00,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-09 13:31:00,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:00,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-09 13:31:00,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:00,609 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:31:00,633 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:00,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:00,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-09 13:31:00,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033441525] [2020-11-09 13:31:00,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-09 13:31:00,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:00,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-09 13:31:00,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-11-09 13:31:00,634 INFO L87 Difference]: Start difference. First operand 73 states and 177 transitions. Second operand 25 states. [2020-11-09 13:31:02,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:02,537 INFO L93 Difference]: Finished difference Result 151 states and 359 transitions. [2020-11-09 13:31:02,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-09 13:31:02,542 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-11-09 13:31:02,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:02,543 INFO L225 Difference]: With dead ends: 151 [2020-11-09 13:31:02,543 INFO L226 Difference]: Without dead ends: 142 [2020-11-09 13:31:02,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1337, Invalid=2953, Unknown=0, NotChecked=0, Total=4290 [2020-11-09 13:31:02,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-11-09 13:31:02,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 95. [2020-11-09 13:31:02,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-11-09 13:31:02,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 243 transitions. [2020-11-09 13:31:02,546 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 243 transitions. Word has length 28 [2020-11-09 13:31:02,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:02,546 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 243 transitions. [2020-11-09 13:31:02,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-09 13:31:02,546 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 243 transitions. [2020-11-09 13:31:02,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-09 13:31:02,547 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:02,547 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:02,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-09 13:31:02,747 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:02,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:02,748 INFO L82 PathProgramCache]: Analyzing trace with hash 512601796, now seen corresponding path program 49 times [2020-11-09 13:31:02,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:02,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935922254] [2020-11-09 13:31:02,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:02,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:02,909 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:02,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935922254] [2020-11-09 13:31:02,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091528481] [2020-11-09 13:31:02,910 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 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 [2020-11-09 13:31:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:02,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-09 13:31:02,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:03,011 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:03,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-09 13:31:03,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2020-11-09 13:31:03,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323045478] [2020-11-09 13:31:03,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 13:31:03,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:03,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 13:31:03,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-11-09 13:31:03,013 INFO L87 Difference]: Start difference. First operand 95 states and 243 transitions. Second operand 13 states. [2020-11-09 13:31:03,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:03,056 INFO L93 Difference]: Finished difference Result 404 states and 979 transitions. [2020-11-09 13:31:03,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-09 13:31:03,056 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-11-09 13:31:03,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:03,057 INFO L225 Difference]: With dead ends: 404 [2020-11-09 13:31:03,057 INFO L226 Difference]: Without dead ends: 46 [2020-11-09 13:31:03,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-11-09 13:31:03,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-09 13:31:03,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-11-09 13:31:03,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-09 13:31:03,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 80 transitions. [2020-11-09 13:31:03,060 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 80 transitions. Word has length 29 [2020-11-09 13:31:03,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:03,060 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 80 transitions. [2020-11-09 13:31:03,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 13:31:03,061 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 80 transitions. [2020-11-09 13:31:03,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-09 13:31:03,061 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:03,061 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:03,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-11-09 13:31:03,270 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:03,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:03,270 INFO L82 PathProgramCache]: Analyzing trace with hash 374257903, now seen corresponding path program 50 times [2020-11-09 13:31:03,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:03,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198443356] [2020-11-09 13:31:03,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:03,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 72 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:03,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198443356] [2020-11-09 13:31:03,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320074651] [2020-11-09 13:31:03,416 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 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 [2020-11-09 13:31:03,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:31:03,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:03,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-09 13:31:03,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:03,531 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:03,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-09 13:31:03,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2020-11-09 13:31:03,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592373703] [2020-11-09 13:31:03,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 13:31:03,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:03,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 13:31:03,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2020-11-09 13:31:03,533 INFO L87 Difference]: Start difference. First operand 46 states and 80 transitions. Second operand 13 states. [2020-11-09 13:31:03,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:03,562 INFO L93 Difference]: Finished difference Result 151 states and 219 transitions. [2020-11-09 13:31:03,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-09 13:31:03,563 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-11-09 13:31:03,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:03,563 INFO L225 Difference]: With dead ends: 151 [2020-11-09 13:31:03,563 INFO L226 Difference]: Without dead ends: 0 [2020-11-09 13:31:03,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2020-11-09 13:31:03,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-09 13:31:03,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-09 13:31:03,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-09 13:31:03,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-09 13:31:03,564 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-11-09 13:31:03,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:03,565 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-09 13:31:03,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 13:31:03,565 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-09 13:31:03,565 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-09 13:31:03,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:31:03,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 01:31:03 BasicIcfg [2020-11-09 13:31:03,770 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-09 13:31:03,771 INFO L168 Benchmark]: Toolchain (without parser) took 68711.42 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 125.4 MB in the beginning and 135.6 MB in the end (delta: -10.2 MB). Peak memory consumption was 154.4 MB. Max. memory is 8.0 GB. [2020-11-09 13:31:03,771 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 125.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-09 13:31:03,772 INFO L168 Benchmark]: CACSL2BoogieTranslator took 657.85 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 128.4 MB in the end (delta: -3.6 MB). Peak memory consumption was 27.8 MB. Max. memory is 8.0 GB. [2020-11-09 13:31:03,772 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.44 ms. Allocated memory is still 151.0 MB. Free memory was 128.4 MB in the beginning and 126.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-09 13:31:03,773 INFO L168 Benchmark]: Boogie Preprocessor took 30.08 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 125.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-09 13:31:03,773 INFO L168 Benchmark]: RCFGBuilder took 656.97 ms. Allocated memory is still 151.0 MB. Free memory was 125.4 MB in the beginning and 105.4 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2020-11-09 13:31:03,774 INFO L168 Benchmark]: TraceAbstraction took 67307.66 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 104.9 MB in the beginning and 135.6 MB in the end (delta: -30.7 MB). Peak memory consumption was 132.9 MB. Max. memory is 8.0 GB. [2020-11-09 13:31:03,776 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 125.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 657.85 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 128.4 MB in the end (delta: -3.6 MB). Peak memory consumption was 27.8 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 44.44 ms. Allocated memory is still 151.0 MB. Free memory was 128.4 MB in the beginning and 126.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.08 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 125.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 656.97 ms. Allocated memory is still 151.0 MB. Free memory was 125.4 MB in the beginning and 105.4 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 67307.66 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 104.9 MB in the beginning and 135.6 MB in the end (delta: -30.7 MB). Peak memory consumption was 132.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 637 VarBasedMoverChecksPositive, 12 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 15 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 4.7s, 65 PlacesBefore, 20 PlacesAfterwards, 64 TransitionsBefore, 16 TransitionsAfterwards, 1144 CoEnabledTransitionPairs, 7 FixpointIterations, 16 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 3 ChoiceCompositions, 62 TotalNumberOfCompositions, 1187 MoverChecksTotal - PositiveResult [Line: 685]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 67.1s, OverallIterations: 52, TraceHistogramMax: 11, AutomataDifference: 36.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.7s, HoareTripleCheckerStatistics: 879 SDtfs, 3525 SDslu, 3212 SDs, 0 SdLazy, 3952 SolverSat, 2897 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2518 GetRequests, 822 SyntacticMatches, 36 SemanticMatches, 1660 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17506 ImplicationChecksByTransitivity, 36.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=95occurred in iteration=50, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 52 MinimizatonAttempts, 1294 StatesRemovedByMinimization, 49 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 11.3s InterpolantComputationTime, 1924 NumberOfCodeBlocks, 1924 NumberOfCodeBlocksAsserted, 233 NumberOfCheckSat, 1825 ConstructedInterpolants, 0 QuantifiedInterpolants, 150101 SizeOfPredicates, 531 NumberOfNonLiveVariables, 6486 ConjunctsInSsa, 738 ConjunctsInUnsatCore, 99 InterpolantComputations, 7 PerfectInterpolantSequences, 362/3520 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...