/usr/bin/java -Xmx16000000000 -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/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-60729f1 [2020-11-11 21:34:19,975 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-11 21:34:19,977 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-11 21:34:20,027 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-11 21:34:20,028 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-11 21:34:20,032 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-11 21:34:20,035 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-11 21:34:20,042 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-11 21:34:20,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-11 21:34:20,051 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-11 21:34:20,052 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-11 21:34:20,054 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-11 21:34:20,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-11 21:34:20,056 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-11 21:34:20,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-11 21:34:20,060 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-11 21:34:20,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-11 21:34:20,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-11 21:34:20,069 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-11 21:34:20,071 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-11 21:34:20,072 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-11 21:34:20,074 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-11 21:34:20,075 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-11 21:34:20,076 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-11 21:34:20,079 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-11 21:34:20,079 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-11 21:34:20,079 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-11 21:34:20,081 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-11 21:34:20,082 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-11 21:34:20,083 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-11 21:34:20,083 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-11 21:34:20,084 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-11 21:34:20,085 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-11 21:34:20,086 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-11 21:34:20,087 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-11 21:34:20,088 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-11 21:34:20,088 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-11 21:34:20,089 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-11 21:34:20,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-11 21:34:20,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-11 21:34:20,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-11 21:34:20,092 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf [2020-11-11 21:34:20,119 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-11 21:34:20,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-11 21:34:20,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-11 21:34:20,121 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-11 21:34:20,121 INFO L138 SettingsManager]: * Use SBE=true [2020-11-11 21:34:20,121 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-11 21:34:20,122 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-11 21:34:20,122 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-11 21:34:20,122 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-11 21:34:20,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-11 21:34:20,122 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-11 21:34:20,123 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-11 21:34:20,123 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-11 21:34:20,123 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-11 21:34:20,123 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-11 21:34:20,123 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-11 21:34:20,124 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-11 21:34:20,124 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-11 21:34:20,124 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-11 21:34:20,124 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-11 21:34:20,124 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-11 21:34:20,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-11 21:34:20,125 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-11 21:34:20,125 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-11 21:34:20,125 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-11 21:34:20,126 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-11 21:34:20,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-11 21:34:20,126 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-11 21:34:20,126 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-11 21:34:20,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-11 21:34:20,548 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-11 21:34:20,551 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-11 21:34:20,552 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-11 21:34:20,553 INFO L275 PluginConnector]: CDTParser initialized [2020-11-11 21:34:20,554 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2020-11-11 21:34:20,634 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59d8a26b1/f0b55c47cee74abba0eac662ad1c7676/FLAGfdde47688 [2020-11-11 21:34:21,342 INFO L306 CDTParser]: Found 1 translation units. [2020-11-11 21:34:21,343 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2020-11-11 21:34:21,361 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59d8a26b1/f0b55c47cee74abba0eac662ad1c7676/FLAGfdde47688 [2020-11-11 21:34:21,656 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59d8a26b1/f0b55c47cee74abba0eac662ad1c7676 [2020-11-11 21:34:21,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-11 21:34:21,666 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-11 21:34:21,667 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-11 21:34:21,667 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-11 21:34:21,671 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-11 21:34:21,672 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 09:34:21" (1/1) ... [2020-11-11 21:34:21,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51ea3a61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:21, skipping insertion in model container [2020-11-11 21:34:21,676 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 09:34:21" (1/1) ... [2020-11-11 21:34:21,683 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-11 21:34:21,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-11 21:34:22,107 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-11 21:34:22,119 INFO L203 MainTranslator]: Completed pre-run [2020-11-11 21:34:22,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-11 21:34:22,307 INFO L208 MainTranslator]: Completed translation [2020-11-11 21:34:22,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:22 WrapperNode [2020-11-11 21:34:22,307 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-11 21:34:22,309 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-11 21:34:22,309 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-11 21:34:22,309 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-11 21:34:22,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:22" (1/1) ... [2020-11-11 21:34:22,333 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:22" (1/1) ... [2020-11-11 21:34:22,354 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-11 21:34:22,355 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-11 21:34:22,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-11 21:34:22,356 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-11 21:34:22,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:22" (1/1) ... [2020-11-11 21:34:22,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:22" (1/1) ... [2020-11-11 21:34:22,368 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:22" (1/1) ... [2020-11-11 21:34:22,369 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:22" (1/1) ... [2020-11-11 21:34:22,377 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:22" (1/1) ... [2020-11-11 21:34:22,391 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:22" (1/1) ... [2020-11-11 21:34:22,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:22" (1/1) ... [2020-11-11 21:34:22,396 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-11 21:34:22,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-11 21:34:22,397 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-11 21:34:22,398 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-11 21:34:22,398 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:22" (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 [2020-11-11 21:34:22,473 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-11 21:34:22,474 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-11 21:34:22,474 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-11 21:34:22,474 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-11 21:34:22,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-11 21:34:22,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-11 21:34:22,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-11 21:34:22,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-11 21:34:22,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-11 21:34:22,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-11 21:34:22,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-11 21:34:22,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-11 21:34:22,477 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-11 21:34:22,990 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-11 21:34:22,990 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-11 21:34:22,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 09:34:22 BoogieIcfgContainer [2020-11-11 21:34:22,994 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-11 21:34:22,997 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-11 21:34:22,997 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-11 21:34:23,000 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-11 21:34:23,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 09:34:21" (1/3) ... [2020-11-11 21:34:23,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ad1a4ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 09:34:23, skipping insertion in model container [2020-11-11 21:34:23,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:22" (2/3) ... [2020-11-11 21:34:23,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ad1a4ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 09:34:23, skipping insertion in model container [2020-11-11 21:34:23,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 09:34:22" (3/3) ... [2020-11-11 21:34:23,005 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2020-11-11 21:34:23,022 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-11 21:34:23,023 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-11 21:34:23,027 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-11 21:34:23,028 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-11 21:34:23,071 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,071 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,071 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,072 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,072 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,072 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,073 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,073 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,073 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,074 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,074 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,074 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,075 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,075 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,076 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,076 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,076 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,076 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,077 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,077 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,078 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,078 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,078 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,078 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,078 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,079 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,079 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,079 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,080 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,081 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,081 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,081 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,081 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,081 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,081 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,082 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,082 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,082 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,083 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,083 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,083 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,084 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,084 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,084 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,085 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,085 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,085 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,085 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,086 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,086 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,086 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,086 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,087 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,087 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,087 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,087 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,090 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,090 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,090 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,090 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,090 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,091 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,099 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,099 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,099 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,100 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,100 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,100 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:23,105 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-11 21:34:23,118 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-11 21:34:23,158 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-11 21:34:23,158 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-11 21:34:23,158 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-11 21:34:23,158 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-11 21:34:23,159 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-11 21:34:23,159 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-11 21:34:23,159 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-11 21:34:23,159 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-11 21:34:23,174 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-11 21:34:23,176 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-11 21:34:23,180 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-11 21:34:23,182 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-11-11 21:34:23,246 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-11-11 21:34:23,246 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-11 21:34:23,254 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 98 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. [2020-11-11 21:34:23,259 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2020-11-11 21:34:25,626 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-11-11 21:34:25,837 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-11-11 21:34:26,323 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 89 [2020-11-11 21:34:26,464 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-11 21:34:26,778 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 89 [2020-11-11 21:34:26,929 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-11 21:34:26,935 INFO L131 LiptonReduction]: Checked pairs total: 1130 [2020-11-11 21:34:26,935 INFO L133 LiptonReduction]: Total number of compositions: 63 [2020-11-11 21:34:26,942 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-11-11 21:34:26,953 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 44 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 43 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:26,955 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 43 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:26,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-11 21:34:26,961 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:26,961 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-11 21:34:26,962 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:26,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:26,968 INFO L82 PathProgramCache]: Analyzing trace with hash -662580448, now seen corresponding path program 1 times [2020-11-11 21:34:26,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:26,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279649571] [2020-11-11 21:34:26,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:27,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:27,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:27,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279649571] [2020-11-11 21:34:27,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:34:27,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-11 21:34:27,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730463305] [2020-11-11 21:34:27,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-11 21:34:27,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:27,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-11 21:34:27,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-11 21:34:27,206 INFO L87 Difference]: Start difference. First operand has 44 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 43 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:27,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:27,272 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-11-11 21:34:27,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-11 21:34:27,274 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2020-11-11 21:34:27,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:27,285 INFO L225 Difference]: With dead ends: 75 [2020-11-11 21:34:27,285 INFO L226 Difference]: Without dead ends: 42 [2020-11-11 21:34:27,286 INFO L749 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 [2020-11-11 21:34:27,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-11 21:34:27,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-11 21:34:27,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 41 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:27,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-11-11 21:34:27,326 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-11-11 21:34:27,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:27,326 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-11-11 21:34:27,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:27,327 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-11-11 21:34:27,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-11 21:34:27,328 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:27,328 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:27,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-11 21:34:27,328 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:27,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:27,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1697822740, now seen corresponding path program 1 times [2020-11-11 21:34:27,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:27,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962930226] [2020-11-11 21:34:27,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:27,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:27,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:27,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962930226] [2020-11-11 21:34:27,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:34:27,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-11 21:34:27,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253137330] [2020-11-11 21:34:27,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-11 21:34:27,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:27,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-11 21:34:27,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-11 21:34:27,418 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:27,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:27,449 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-11-11 21:34:27,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-11 21:34:27,450 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2020-11-11 21:34:27,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:27,451 INFO L225 Difference]: With dead ends: 56 [2020-11-11 21:34:27,451 INFO L226 Difference]: Without dead ends: 50 [2020-11-11 21:34:27,452 INFO L749 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 [2020-11-11 21:34:27,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-11 21:34:27,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-11-11 21:34:27,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 41 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:27,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-11-11 21:34:27,460 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-11-11 21:34:27,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:27,461 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-11-11 21:34:27,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:27,462 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-11-11 21:34:27,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-11 21:34:27,463 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:27,463 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:27,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-11 21:34:27,463 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:27,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:27,464 INFO L82 PathProgramCache]: Analyzing trace with hash 479902737, now seen corresponding path program 1 times [2020-11-11 21:34:27,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:27,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868038831] [2020-11-11 21:34:27,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:27,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:27,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868038831] [2020-11-11 21:34:27,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:34:27,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-11 21:34:27,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652916715] [2020-11-11 21:34:27,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 21:34:27,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:27,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 21:34:27,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-11 21:34:27,561 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:27,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:27,672 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-11-11 21:34:27,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-11 21:34:27,676 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2020-11-11 21:34:27,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:27,678 INFO L225 Difference]: With dead ends: 78 [2020-11-11 21:34:27,679 INFO L226 Difference]: Without dead ends: 71 [2020-11-11 21:34:27,679 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-11 21:34:27,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-11 21:34:27,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-11-11 21:34:27,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.511111111111111) internal successors, (113), 45 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:27,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-11-11 21:34:27,694 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-11-11 21:34:27,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:27,694 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-11-11 21:34:27,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:27,695 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-11-11 21:34:27,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-11 21:34:27,697 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:27,697 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:27,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-11 21:34:27,698 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:27,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:27,700 INFO L82 PathProgramCache]: Analyzing trace with hash 479987367, now seen corresponding path program 2 times [2020-11-11 21:34:27,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:27,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325505287] [2020-11-11 21:34:27,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:27,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:27,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:27,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325505287] [2020-11-11 21:34:27,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:34:27,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-11 21:34:27,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247552180] [2020-11-11 21:34:27,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 21:34:27,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:27,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 21:34:27,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-11 21:34:27,787 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:27,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:27,862 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-11-11 21:34:27,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-11 21:34:27,862 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2020-11-11 21:34:27,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:27,863 INFO L225 Difference]: With dead ends: 54 [2020-11-11 21:34:27,864 INFO L226 Difference]: Without dead ends: 43 [2020-11-11 21:34:27,864 INFO L749 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 [2020-11-11 21:34:27,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-11 21:34:27,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-11-11 21:34:27,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:27,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-11-11 21:34:27,869 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-11-11 21:34:27,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:27,869 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-11-11 21:34:27,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:27,870 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-11-11 21:34:27,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-11 21:34:27,870 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:27,871 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:27,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-11 21:34:27,871 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:27,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:27,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1753602359, now seen corresponding path program 3 times [2020-11-11 21:34:27,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:27,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670242941] [2020-11-11 21:34:27,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:27,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:27,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:27,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670242941] [2020-11-11 21:34:27,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:34:27,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-11 21:34:27,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505703669] [2020-11-11 21:34:27,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 21:34:27,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:27,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 21:34:27,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-11 21:34:27,936 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:28,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:28,025 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-11-11 21:34:28,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-11 21:34:28,026 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2020-11-11 21:34:28,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:28,028 INFO L225 Difference]: With dead ends: 57 [2020-11-11 21:34:28,028 INFO L226 Difference]: Without dead ends: 51 [2020-11-11 21:34:28,029 INFO L749 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 [2020-11-11 21:34:28,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-11 21:34:28,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-11-11 21:34:28,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:28,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-11-11 21:34:28,042 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-11-11 21:34:28,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:28,042 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-11-11 21:34:28,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:28,045 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-11-11 21:34:28,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:34:28,046 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:28,046 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:28,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-11 21:34:28,046 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:28,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:28,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1994728946, now seen corresponding path program 4 times [2020-11-11 21:34:28,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:28,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862172291] [2020-11-11 21:34:28,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:28,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:28,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862172291] [2020-11-11 21:34:28,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135334631] [2020-11-11 21:34:28,120 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 [2020-11-11 21:34:28,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:34:28,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:28,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-11 21:34:28,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:28,274 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:34:28,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:28,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:28,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-11 21:34:28,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525809816] [2020-11-11 21:34:28,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-11 21:34:28,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:28,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-11 21:34:28,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-11 21:34:28,313 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:28,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:28,497 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-11-11 21:34:28,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-11 21:34:28,498 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2020-11-11 21:34:28,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:28,499 INFO L225 Difference]: With dead ends: 48 [2020-11-11 21:34:28,499 INFO L226 Difference]: Without dead ends: 43 [2020-11-11 21:34:28,499 INFO L749 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 [2020-11-11 21:34:28,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-11 21:34:28,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-11-11 21:34:28,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.484848484848485) internal successors, (82), 33 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:28,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-11-11 21:34:28,505 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-11-11 21:34:28,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:28,505 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-11-11 21:34:28,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:28,505 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-11-11 21:34:28,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:34:28,506 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:28,506 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:28,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-11 21:34:28,719 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:28,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:28,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1390880661, now seen corresponding path program 5 times [2020-11-11 21:34:28,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:28,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452740307] [2020-11-11 21:34:28,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:28,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:28,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452740307] [2020-11-11 21:34:28,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897935912] [2020-11-11 21:34:28,805 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 [2020-11-11 21:34:28,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:34:28,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:28,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-11 21:34:28,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:28,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:28,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:28,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-11-11 21:34:28,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470583308] [2020-11-11 21:34:28,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-11 21:34:28,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:28,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-11 21:34:28,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-11 21:34:28,924 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:29,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:29,019 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-11-11 21:34:29,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-11 21:34:29,021 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2020-11-11 21:34:29,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:29,021 INFO L225 Difference]: With dead ends: 54 [2020-11-11 21:34:29,022 INFO L226 Difference]: Without dead ends: 48 [2020-11-11 21:34:29,022 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-11-11 21:34:29,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-11-11 21:34:29,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-11-11 21:34:29,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:29,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-11-11 21:34:29,028 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-11-11 21:34:29,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:29,028 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-11-11 21:34:29,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:29,028 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-11-11 21:34:29,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:34:29,029 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:29,029 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:29,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:29,240 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:29,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:29,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1472928981, now seen corresponding path program 6 times [2020-11-11 21:34:29,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:29,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537317274] [2020-11-11 21:34:29,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:29,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:29,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537317274] [2020-11-11 21:34:29,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638559995] [2020-11-11 21:34:29,330 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 [2020-11-11 21:34:29,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-11 21:34:29,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:29,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:34:29,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:29,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:29,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:29,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-11 21:34:29,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969343624] [2020-11-11 21:34:29,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-11 21:34:29,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:29,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-11 21:34:29,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-11 21:34:29,459 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:29,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:29,694 INFO L93 Difference]: Finished difference Result 66 states and 155 transitions. [2020-11-11 21:34:29,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 21:34:29,696 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2020-11-11 21:34:29,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:29,697 INFO L225 Difference]: With dead ends: 66 [2020-11-11 21:34:29,697 INFO L226 Difference]: Without dead ends: 57 [2020-11-11 21:34:29,697 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:34:29,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-11 21:34:29,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 43. [2020-11-11 21:34:29,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.5) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:29,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-11-11 21:34:29,709 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-11-11 21:34:29,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:29,710 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-11-11 21:34:29,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:29,713 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-11-11 21:34:29,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:34:29,716 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:29,716 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:29,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:29,918 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:29,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:29,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1625034124, now seen corresponding path program 7 times [2020-11-11 21:34:29,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:29,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281526415] [2020-11-11 21:34:29,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:29,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:30,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:30,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281526415] [2020-11-11 21:34:30,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193520329] [2020-11-11 21:34:30,039 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 [2020-11-11 21:34:30,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:30,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:34:30,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:30,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:30,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:30,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-11 21:34:30,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183606073] [2020-11-11 21:34:30,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-11 21:34:30,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:30,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-11 21:34:30,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-11 21:34:30,149 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:30,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:30,256 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-11-11 21:34:30,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-11 21:34:30,257 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2020-11-11 21:34:30,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:30,258 INFO L225 Difference]: With dead ends: 64 [2020-11-11 21:34:30,258 INFO L226 Difference]: Without dead ends: 58 [2020-11-11 21:34:30,258 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:34:30,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-11 21:34:30,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-11-11 21:34:30,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.477272727272727) internal successors, (109), 44 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:30,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-11-11 21:34:30,269 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-11-11 21:34:30,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:30,269 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-11-11 21:34:30,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:30,269 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-11-11 21:34:30,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:34:30,270 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:30,270 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:30,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:30,481 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:30,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:30,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1707082444, now seen corresponding path program 8 times [2020-11-11 21:34:30,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:30,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713578747] [2020-11-11 21:34:30,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:30,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:30,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713578747] [2020-11-11 21:34:30,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651148026] [2020-11-11 21:34:30,550 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 [2020-11-11 21:34:30,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:34:30,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:30,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:34:30,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:30,646 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:34:30,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:30,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:30,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-11 21:34:30,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233014090] [2020-11-11 21:34:30,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-11 21:34:30,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:30,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-11 21:34:30,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-11 21:34:30,660 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:30,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:30,943 INFO L93 Difference]: Finished difference Result 61 states and 145 transitions. [2020-11-11 21:34:30,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-11 21:34:30,944 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2020-11-11 21:34:30,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:30,945 INFO L225 Difference]: With dead ends: 61 [2020-11-11 21:34:30,945 INFO L226 Difference]: Without dead ends: 52 [2020-11-11 21:34:30,946 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-11-11 21:34:30,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-11 21:34:30,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2020-11-11 21:34:30,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:30,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-11-11 21:34:30,950 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-11-11 21:34:30,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:30,951 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-11-11 21:34:30,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:30,951 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-11-11 21:34:30,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:34:30,951 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:30,951 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:31,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-11 21:34:31,160 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:31,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:31,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1583819388, now seen corresponding path program 9 times [2020-11-11 21:34:31,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:31,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829974733] [2020-11-11 21:34:31,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:31,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:31,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829974733] [2020-11-11 21:34:31,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98088433] [2020-11-11 21:34:31,231 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 [2020-11-11 21:34:31,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:34:31,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:31,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:34:31,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:31,333 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:34:31,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:31,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:31,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-11 21:34:31,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723140272] [2020-11-11 21:34:31,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-11 21:34:31,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:31,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-11 21:34:31,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-11 21:34:31,347 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:31,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:31,540 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-11-11 21:34:31,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-11 21:34:31,541 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2020-11-11 21:34:31,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:31,541 INFO L225 Difference]: With dead ends: 60 [2020-11-11 21:34:31,541 INFO L226 Difference]: Without dead ends: 55 [2020-11-11 21:34:31,543 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-11-11 21:34:31,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-11 21:34:31,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-11-11 21:34:31,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.511111111111111) internal successors, (113), 45 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:31,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-11-11 21:34:31,552 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-11-11 21:34:31,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:31,552 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-11-11 21:34:31,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:31,553 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-11-11 21:34:31,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:34:31,555 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:31,555 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:31,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:31,756 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:31,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:31,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1379970669, now seen corresponding path program 10 times [2020-11-11 21:34:31,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:31,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084019822] [2020-11-11 21:34:31,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:31,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:31,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084019822] [2020-11-11 21:34:31,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730726303] [2020-11-11 21:34:31,844 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 [2020-11-11 21:34:31,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:34:31,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:31,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:34:31,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:31,940 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:34:31,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:31,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:31,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-11 21:34:31,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724873876] [2020-11-11 21:34:31,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 21:34:31,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:31,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 21:34:31,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-11-11 21:34:31,959 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:32,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:32,177 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-11-11 21:34:32,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-11 21:34:32,177 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:34:32,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:32,179 INFO L225 Difference]: With dead ends: 54 [2020-11-11 21:34:32,180 INFO L226 Difference]: Without dead ends: 49 [2020-11-11 21:34:32,180 INFO L749 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 [2020-11-11 21:34:32,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-11 21:34:32,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-11-11 21:34:32,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:32,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-11-11 21:34:32,185 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-11-11 21:34:32,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:32,185 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-11-11 21:34:32,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:32,185 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-11-11 21:34:32,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:34:32,186 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:32,186 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:32,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:32,387 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:32,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:32,388 INFO L82 PathProgramCache]: Analyzing trace with hash 901490704, now seen corresponding path program 11 times [2020-11-11 21:34:32,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:32,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494646126] [2020-11-11 21:34:32,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:32,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:32,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:32,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494646126] [2020-11-11 21:34:32,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710009952] [2020-11-11 21:34:32,507 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 [2020-11-11 21:34:32,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:34:32,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:32,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:34:32,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:32,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:32,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:32,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-11-11 21:34:32,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921041492] [2020-11-11 21:34:32,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-11 21:34:32,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:32,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-11 21:34:32,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-11-11 21:34:32,605 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:32,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:32,729 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-11-11 21:34:32,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-11 21:34:32,730 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:34:32,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:32,731 INFO L225 Difference]: With dead ends: 60 [2020-11-11 21:34:32,731 INFO L226 Difference]: Without dead ends: 54 [2020-11-11 21:34:32,734 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-11-11 21:34:32,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-11 21:34:32,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-11-11 21:34:32,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.466666666666667) internal successors, (111), 45 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:32,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-11-11 21:34:32,742 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-11-11 21:34:32,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:32,743 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-11-11 21:34:32,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:32,744 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-11-11 21:34:32,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:34:32,749 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:32,749 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:32,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-11 21:34:32,960 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:32,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:32,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1853733510, now seen corresponding path program 12 times [2020-11-11 21:34:32,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:32,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900460639] [2020-11-11 21:34:32,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:33,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:33,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900460639] [2020-11-11 21:34:33,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271802564] [2020-11-11 21:34:33,034 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 [2020-11-11 21:34:33,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:34:33,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:33,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:34:33,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:33,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:33,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:33,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-11 21:34:33,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353552139] [2020-11-11 21:34:33,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 21:34:33,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:33,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 21:34:33,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-11 21:34:33,136 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:33,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:33,439 INFO L93 Difference]: Finished difference Result 75 states and 177 transitions. [2020-11-11 21:34:33,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 21:34:33,440 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:34:33,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:33,441 INFO L225 Difference]: With dead ends: 75 [2020-11-11 21:34:33,441 INFO L226 Difference]: Without dead ends: 66 [2020-11-11 21:34:33,442 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-11-11 21:34:33,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-11 21:34:33,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2020-11-11 21:34:33,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.5208333333333335) internal successors, (121), 48 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:33,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-11-11 21:34:33,447 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-11-11 21:34:33,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:33,448 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-11-11 21:34:33,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:33,448 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-11-11 21:34:33,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:34:33,449 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:33,449 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:33,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:33,655 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:33,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:33,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1710298041, now seen corresponding path program 13 times [2020-11-11 21:34:33,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:33,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485129006] [2020-11-11 21:34:33,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:33,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485129006] [2020-11-11 21:34:33,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444926326] [2020-11-11 21:34:33,783 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 [2020-11-11 21:34:33,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:33,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:34:33,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:33,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:33,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-11 21:34:33,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3918691] [2020-11-11 21:34:33,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 21:34:33,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:33,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 21:34:33,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-11 21:34:33,882 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:34,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:34,103 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-11-11 21:34:34,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-11 21:34:34,104 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:34:34,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:34,105 INFO L225 Difference]: With dead ends: 74 [2020-11-11 21:34:34,105 INFO L226 Difference]: Without dead ends: 68 [2020-11-11 21:34:34,106 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:34:34,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-11 21:34:34,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-11-11 21:34:34,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.5) internal successors, (125), 50 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:34,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-11-11 21:34:34,111 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-11-11 21:34:34,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:34,111 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-11-11 21:34:34,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:34,111 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-11-11 21:34:34,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:34:34,112 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:34,112 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:34,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-11 21:34:34,324 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:34,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:34,325 INFO L82 PathProgramCache]: Analyzing trace with hash -170554959, now seen corresponding path program 14 times [2020-11-11 21:34:34,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:34,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464474089] [2020-11-11 21:34:34,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:34,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:34,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:34,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464474089] [2020-11-11 21:34:34,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058706287] [2020-11-11 21:34:34,435 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 [2020-11-11 21:34:34,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:34:34,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:34,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:34:34,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:34,533 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:34:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:34,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:34,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-11 21:34:34,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382893149] [2020-11-11 21:34:34,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:34:34,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:34,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:34:34,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:34:34,545 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:34,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:34,933 INFO L93 Difference]: Finished difference Result 69 states and 165 transitions. [2020-11-11 21:34:34,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 21:34:34,934 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:34:34,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:34,935 INFO L225 Difference]: With dead ends: 69 [2020-11-11 21:34:34,935 INFO L226 Difference]: Without dead ends: 60 [2020-11-11 21:34:34,935 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-11-11 21:34:34,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-11 21:34:34,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2020-11-11 21:34:34,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.45) internal successors, (98), 40 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:34,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-11-11 21:34:34,942 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-11-11 21:34:34,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:34,942 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-11-11 21:34:34,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:34,942 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-11-11 21:34:34,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:34:34,943 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:34,943 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:35,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-11 21:34:35,149 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:35,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:35,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1631141505, now seen corresponding path program 15 times [2020-11-11 21:34:35,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:35,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149631924] [2020-11-11 21:34:35,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:35,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:35,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:35,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149631924] [2020-11-11 21:34:35,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278391391] [2020-11-11 21:34:35,256 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 [2020-11-11 21:34:35,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 21:34:35,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:35,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:34:35,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:35,351 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:34:35,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:35,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:35,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-11 21:34:35,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932773377] [2020-11-11 21:34:35,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:34:35,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:35,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:34:35,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:34:35,369 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:35,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:35,728 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-11-11 21:34:35,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 21:34:35,729 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:34:35,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:35,730 INFO L225 Difference]: With dead ends: 68 [2020-11-11 21:34:35,731 INFO L226 Difference]: Without dead ends: 63 [2020-11-11 21:34:35,731 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-11-11 21:34:35,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-11 21:34:35,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-11-11 21:34:35,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.5294117647058822) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:35,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-11-11 21:34:35,738 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-11-11 21:34:35,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:35,738 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-11-11 21:34:35,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:35,738 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-11-11 21:34:35,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-11 21:34:35,739 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:35,739 INFO L494 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:35,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-11 21:34:35,940 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:35,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:35,941 INFO L82 PathProgramCache]: Analyzing trace with hash -992213976, now seen corresponding path program 16 times [2020-11-11 21:34:35,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:35,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148283968] [2020-11-11 21:34:35,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:35,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:36,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148283968] [2020-11-11 21:34:36,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332786047] [2020-11-11 21:34:36,049 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 [2020-11-11 21:34:36,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:34:36,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:36,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:34:36,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:36,144 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:34:36,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:36,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:36,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-11 21:34:36,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176875868] [2020-11-11 21:34:36,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 21:34:36,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:36,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 21:34:36,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-11-11 21:34:36,163 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:36,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:36,557 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-11-11 21:34:36,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 21:34:36,557 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2020-11-11 21:34:36,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:36,558 INFO L225 Difference]: With dead ends: 60 [2020-11-11 21:34:36,558 INFO L226 Difference]: Without dead ends: 55 [2020-11-11 21:34:36,559 INFO L749 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 [2020-11-11 21:34:36,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-11 21:34:36,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-11-11 21:34:36,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.4878048780487805) internal successors, (102), 41 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:36,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-11-11 21:34:36,562 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-11-11 21:34:36,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:36,563 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-11-11 21:34:36,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:36,563 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-11-11 21:34:36,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-11 21:34:36,563 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:36,563 INFO L494 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:36,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-11 21:34:36,774 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:36,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:36,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1250822709, now seen corresponding path program 17 times [2020-11-11 21:34:36,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:36,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449655653] [2020-11-11 21:34:36,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:36,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:36,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449655653] [2020-11-11 21:34:36,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59458616] [2020-11-11 21:34:36,898 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 [2020-11-11 21:34:36,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 21:34:36,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:36,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:34:36,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:36,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:36,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:36,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-11-11 21:34:36,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774716578] [2020-11-11 21:34:36,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:34:36,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:36,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:34:36,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:34:36,981 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:37,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:37,156 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-11-11 21:34:37,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-11 21:34:37,157 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2020-11-11 21:34:37,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:37,158 INFO L225 Difference]: With dead ends: 66 [2020-11-11 21:34:37,158 INFO L226 Difference]: Without dead ends: 60 [2020-11-11 21:34:37,158 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-11-11 21:34:37,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-11 21:34:37,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-11-11 21:34:37,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.4693877551020407) internal successors, (121), 49 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:37,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-11-11 21:34:37,162 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-11-11 21:34:37,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:37,162 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-11-11 21:34:37,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:37,162 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-11-11 21:34:37,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-11 21:34:37,163 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:37,163 INFO L494 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:37,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:37,364 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:37,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:37,364 INFO L82 PathProgramCache]: Analyzing trace with hash 974248159, now seen corresponding path program 18 times [2020-11-11 21:34:37,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:37,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486835841] [2020-11-11 21:34:37,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:37,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:37,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:37,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486835841] [2020-11-11 21:34:37,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024600398] [2020-11-11 21:34:37,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 21:34:37,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 21:34:37,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:37,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:34:37,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:37,596 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:34:37,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:37,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:37,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-11 21:34:37,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664197752] [2020-11-11 21:34:37,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 21:34:37,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:37,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 21:34:37,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-11-11 21:34:37,609 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:38,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:38,028 INFO L93 Difference]: Finished difference Result 85 states and 201 transitions. [2020-11-11 21:34:38,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 21:34:38,029 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2020-11-11 21:34:38,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:38,030 INFO L225 Difference]: With dead ends: 85 [2020-11-11 21:34:38,030 INFO L226 Difference]: Without dead ends: 76 [2020-11-11 21:34:38,031 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-11-11 21:34:38,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-11 21:34:38,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 55. [2020-11-11 21:34:38,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.537037037037037) internal successors, (137), 54 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:38,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-11-11 21:34:38,035 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-11-11 21:34:38,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:38,035 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-11-11 21:34:38,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:38,035 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-11-11 21:34:38,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-11 21:34:38,036 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:38,036 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:38,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:38,248 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:38,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:38,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1376061506, now seen corresponding path program 19 times [2020-11-11 21:34:38,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:38,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933799338] [2020-11-11 21:34:38,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:38,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:38,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:38,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933799338] [2020-11-11 21:34:38,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399697481] [2020-11-11 21:34:38,399 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 [2020-11-11 21:34:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:38,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 21:34:38,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:38,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:38,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-11 21:34:38,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466063412] [2020-11-11 21:34:38,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 21:34:38,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:38,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 21:34:38,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-11-11 21:34:38,514 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:38,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:38,750 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-11-11 21:34:38,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-11 21:34:38,751 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2020-11-11 21:34:38,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:38,753 INFO L225 Difference]: With dead ends: 84 [2020-11-11 21:34:38,753 INFO L226 Difference]: Without dead ends: 78 [2020-11-11 21:34:38,753 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-11-11 21:34:38,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-11 21:34:38,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-11-11 21:34:38,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.517857142857143) internal successors, (141), 56 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:38,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-11-11 21:34:38,760 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-11-11 21:34:38,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:38,760 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-11-11 21:34:38,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:38,760 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-11-11 21:34:38,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-11 21:34:38,761 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:38,763 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:38,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:38,975 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:38,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:38,976 INFO L82 PathProgramCache]: Analyzing trace with hash -693834922, now seen corresponding path program 20 times [2020-11-11 21:34:38,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:38,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227452614] [2020-11-11 21:34:38,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:38,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:39,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:39,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227452614] [2020-11-11 21:34:39,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265178521] [2020-11-11 21:34:39,072 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 [2020-11-11 21:34:39,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:34:39,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:39,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 21:34:39,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:39,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:39,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:39,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-11 21:34:39,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323996570] [2020-11-11 21:34:39,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:34:39,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:39,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:34:39,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:34:39,201 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:39,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:39,621 INFO L93 Difference]: Finished difference Result 75 states and 181 transitions. [2020-11-11 21:34:39,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 21:34:39,622 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2020-11-11 21:34:39,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:39,623 INFO L225 Difference]: With dead ends: 75 [2020-11-11 21:34:39,623 INFO L226 Difference]: Without dead ends: 66 [2020-11-11 21:34:39,623 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-11-11 21:34:39,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-11 21:34:39,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 45. [2020-11-11 21:34:39,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.4545454545454546) internal successors, (108), 44 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:39,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-11-11 21:34:39,626 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-11-11 21:34:39,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:39,626 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-11-11 21:34:39,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:39,627 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-11-11 21:34:39,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-11 21:34:39,627 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:39,627 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:39,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-11 21:34:39,836 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:39,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:39,837 INFO L82 PathProgramCache]: Analyzing trace with hash 136944314, now seen corresponding path program 21 times [2020-11-11 21:34:39,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:39,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698288094] [2020-11-11 21:34:39,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:39,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:39,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:39,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698288094] [2020-11-11 21:34:39,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661053860] [2020-11-11 21:34:39,966 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 [2020-11-11 21:34:40,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 21:34:40,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:40,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 21:34:40,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:40,074 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:34:40,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:40,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:40,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-11 21:34:40,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644958097] [2020-11-11 21:34:40,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:34:40,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:40,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:34:40,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:34:40,090 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:40,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:40,545 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-11-11 21:34:40,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 21:34:40,546 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2020-11-11 21:34:40,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:40,547 INFO L225 Difference]: With dead ends: 76 [2020-11-11 21:34:40,547 INFO L226 Difference]: Without dead ends: 71 [2020-11-11 21:34:40,548 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-11-11 21:34:40,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-11 21:34:40,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-11-11 21:34:40,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.543859649122807) internal successors, (145), 57 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:40,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-11-11 21:34:40,550 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-11-11 21:34:40,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:40,551 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-11-11 21:34:40,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:40,551 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-11-11 21:34:40,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-11 21:34:40,551 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:40,551 INFO L494 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:40,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-11 21:34:40,754 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:40,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:40,754 INFO L82 PathProgramCache]: Analyzing trace with hash -34023645, now seen corresponding path program 22 times [2020-11-11 21:34:40,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:40,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486760597] [2020-11-11 21:34:40,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:40,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:40,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:40,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486760597] [2020-11-11 21:34:40,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371140366] [2020-11-11 21:34:40,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 21:34:40,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:34:40,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:40,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 21:34:40,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:40,977 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:34:40,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:40,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:40,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-11 21:34:40,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496660386] [2020-11-11 21:34:40,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 21:34:40,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:40,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 21:34:40,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-11-11 21:34:40,992 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:41,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:41,519 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-11-11 21:34:41,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 21:34:41,520 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2020-11-11 21:34:41,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:41,521 INFO L225 Difference]: With dead ends: 66 [2020-11-11 21:34:41,521 INFO L226 Difference]: Without dead ends: 61 [2020-11-11 21:34:41,522 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-11-11 21:34:41,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-11 21:34:41,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-11-11 21:34:41,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.488888888888889) internal successors, (112), 45 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:41,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-11-11 21:34:41,525 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-11-11 21:34:41,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:41,525 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-11-11 21:34:41,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:41,526 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-11-11 21:34:41,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-11 21:34:41,526 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:41,526 INFO L494 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:41,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-11 21:34:41,736 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:41,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:41,737 INFO L82 PathProgramCache]: Analyzing trace with hash 550224070, now seen corresponding path program 23 times [2020-11-11 21:34:41,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:41,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575666036] [2020-11-11 21:34:41,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:41,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:41,891 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:41,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575666036] [2020-11-11 21:34:41,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602110117] [2020-11-11 21:34:41,892 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 [2020-11-11 21:34:41,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-11 21:34:41,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:41,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 21:34:41,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:41,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:41,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:41,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-11-11 21:34:41,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892807316] [2020-11-11 21:34:41,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:34:41,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:41,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:34:41,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:34:41,985 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:42,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:42,200 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-11-11 21:34:42,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-11 21:34:42,201 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2020-11-11 21:34:42,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:42,201 INFO L225 Difference]: With dead ends: 72 [2020-11-11 21:34:42,201 INFO L226 Difference]: Without dead ends: 66 [2020-11-11 21:34:42,202 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-11-11 21:34:42,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-11 21:34:42,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-11-11 21:34:42,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.4716981132075473) internal successors, (131), 53 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:42,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-11-11 21:34:42,204 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-11-11 21:34:42,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:42,205 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-11-11 21:34:42,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:42,205 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-11-11 21:34:42,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-11 21:34:42,208 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:42,208 INFO L494 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:42,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-11 21:34:42,418 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:42,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:42,418 INFO L82 PathProgramCache]: Analyzing trace with hash -49666300, now seen corresponding path program 24 times [2020-11-11 21:34:42,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:42,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706674799] [2020-11-11 21:34:42,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:42,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:42,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:42,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706674799] [2020-11-11 21:34:42,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479102791] [2020-11-11 21:34:42,528 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 [2020-11-11 21:34:42,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-11 21:34:42,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:42,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 21:34:42,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:42,634 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:34:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:42,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:42,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-11 21:34:42,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456383304] [2020-11-11 21:34:42,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 21:34:42,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:42,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 21:34:42,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-11-11 21:34:42,655 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:43,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:43,225 INFO L93 Difference]: Finished difference Result 95 states and 225 transitions. [2020-11-11 21:34:43,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 21:34:43,226 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2020-11-11 21:34:43,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:43,227 INFO L225 Difference]: With dead ends: 95 [2020-11-11 21:34:43,227 INFO L226 Difference]: Without dead ends: 86 [2020-11-11 21:34:43,228 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 21:34:43,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-11-11 21:34:43,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-11-11 21:34:43,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.55) internal successors, (153), 60 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:43,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-11-11 21:34:43,232 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-11-11 21:34:43,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:43,232 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-11-11 21:34:43,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:43,232 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-11-11 21:34:43,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-11 21:34:43,233 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:43,233 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:43,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-11 21:34:43,439 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:43,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:43,439 INFO L82 PathProgramCache]: Analyzing trace with hash -454815363, now seen corresponding path program 25 times [2020-11-11 21:34:43,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:43,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956904934] [2020-11-11 21:34:43,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:43,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:43,605 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:43,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956904934] [2020-11-11 21:34:43,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159785773] [2020-11-11 21:34:43,605 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 [2020-11-11 21:34:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:43,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 21:34:43,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:43,706 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:43,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:43,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-11 21:34:43,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345840099] [2020-11-11 21:34:43,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 21:34:43,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:43,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 21:34:43,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-11-11 21:34:43,708 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:43,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:43,990 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-11-11 21:34:43,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 21:34:43,991 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2020-11-11 21:34:43,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:43,992 INFO L225 Difference]: With dead ends: 94 [2020-11-11 21:34:43,992 INFO L226 Difference]: Without dead ends: 88 [2020-11-11 21:34:43,993 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-11-11 21:34:43,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-11 21:34:43,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-11-11 21:34:43,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.532258064516129) internal successors, (157), 62 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:43,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-11-11 21:34:43,996 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-11-11 21:34:43,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:43,997 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-11-11 21:34:43,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:43,997 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-11-11 21:34:43,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-11 21:34:43,997 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:43,998 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:44,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:44,208 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:44,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:44,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1054705733, now seen corresponding path program 26 times [2020-11-11 21:34:44,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:44,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751755690] [2020-11-11 21:34:44,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:44,328 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:44,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751755690] [2020-11-11 21:34:44,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015337576] [2020-11-11 21:34:44,328 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 [2020-11-11 21:34:44,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:34:44,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:44,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 21:34:44,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:44,430 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:34:44,444 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:44,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:44,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-11 21:34:44,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738237002] [2020-11-11 21:34:44,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:34:44,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:44,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:34:44,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:34:44,446 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:45,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:45,102 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-11-11 21:34:45,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 21:34:45,107 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2020-11-11 21:34:45,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:45,108 INFO L225 Difference]: With dead ends: 85 [2020-11-11 21:34:45,108 INFO L226 Difference]: Without dead ends: 76 [2020-11-11 21:34:45,109 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-11-11 21:34:45,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-11 21:34:45,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 49. [2020-11-11 21:34:45,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.4583333333333335) internal successors, (118), 48 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:45,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-11-11 21:34:45,113 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-11-11 21:34:45,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:45,113 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-11-11 21:34:45,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:45,119 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-11-11 21:34:45,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-11 21:34:45,120 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:45,120 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:45,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-11 21:34:45,321 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:45,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:45,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1539632843, now seen corresponding path program 27 times [2020-11-11 21:34:45,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:45,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229517761] [2020-11-11 21:34:45,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:45,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:45,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229517761] [2020-11-11 21:34:45,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739303949] [2020-11-11 21:34:45,441 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 [2020-11-11 21:34:45,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-11 21:34:45,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:45,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 21:34:45,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:45,536 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:34:45,554 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:45,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:45,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-11 21:34:45,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825685025] [2020-11-11 21:34:45,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:34:45,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:45,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:34:45,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:34:45,558 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:46,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:46,161 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-11-11 21:34:46,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 21:34:46,162 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2020-11-11 21:34:46,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:46,163 INFO L225 Difference]: With dead ends: 84 [2020-11-11 21:34:46,163 INFO L226 Difference]: Without dead ends: 79 [2020-11-11 21:34:46,164 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-11-11 21:34:46,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-11 21:34:46,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-11-11 21:34:46,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.5555555555555554) internal successors, (161), 63 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:46,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-11-11 21:34:46,167 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-11-11 21:34:46,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:46,168 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-11-11 21:34:46,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:46,168 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-11-11 21:34:46,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-11 21:34:46,168 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:46,168 INFO L494 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:46,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-11 21:34:46,369 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:46,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:46,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1663883102, now seen corresponding path program 28 times [2020-11-11 21:34:46,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:46,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085859300] [2020-11-11 21:34:46,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:46,460 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:46,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085859300] [2020-11-11 21:34:46,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816837896] [2020-11-11 21:34:46,461 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 [2020-11-11 21:34:46,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:34:46,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:46,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-11 21:34:46,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:46,560 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:46,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-11 21:34:46,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 10 [2020-11-11 21:34:46,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432832911] [2020-11-11 21:34:46,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-11 21:34:46,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:46,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-11 21:34:46,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-11-11 21:34:46,561 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:46,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:46,584 INFO L93 Difference]: Finished difference Result 151 states and 338 transitions. [2020-11-11 21:34:46,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-11 21:34:46,585 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2020-11-11 21:34:46,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:46,585 INFO L225 Difference]: With dead ends: 151 [2020-11-11 21:34:46,585 INFO L226 Difference]: Without dead ends: 50 [2020-11-11 21:34:46,586 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-11-11 21:34:46,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-11 21:34:46,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-11-11 21:34:46,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 49 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:46,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 100 transitions. [2020-11-11 21:34:46,588 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 100 transitions. Word has length 19 [2020-11-11 21:34:46,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:46,588 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 100 transitions. [2020-11-11 21:34:46,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:46,588 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 100 transitions. [2020-11-11 21:34:46,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-11 21:34:46,589 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:46,589 INFO L494 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:46,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:46,798 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:46,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:46,798 INFO L82 PathProgramCache]: Analyzing trace with hash 484358401, now seen corresponding path program 29 times [2020-11-11 21:34:46,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:46,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649178626] [2020-11-11 21:34:46,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:46,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:46,974 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:46,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649178626] [2020-11-11 21:34:46,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055482528] [2020-11-11 21:34:46,974 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 [2020-11-11 21:34:47,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-11 21:34:47,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:47,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-11 21:34:47,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:47,146 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:47,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-11 21:34:47,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 21 [2020-11-11 21:34:47,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149709252] [2020-11-11 21:34:47,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-11 21:34:47,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:47,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-11 21:34:47,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-11-11 21:34:47,148 INFO L87 Difference]: Start difference. First operand 50 states and 100 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:47,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:47,163 INFO L93 Difference]: Finished difference Result 86 states and 150 transitions. [2020-11-11 21:34:47,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-11 21:34:47,164 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2020-11-11 21:34:47,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:47,164 INFO L225 Difference]: With dead ends: 86 [2020-11-11 21:34:47,164 INFO L226 Difference]: Without dead ends: 0 [2020-11-11 21:34:47,165 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-11-11 21:34:47,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-11 21:34:47,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-11 21:34:47,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:47,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-11 21:34:47,167 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-11-11 21:34:47,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:47,167 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-11 21:34:47,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:47,167 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-11 21:34:47,167 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-11 21:34:47,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:47,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.11 09:34:47 BasicIcfg [2020-11-11 21:34:47,372 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-11 21:34:47,373 INFO L168 Benchmark]: Toolchain (without parser) took 25712.55 ms. Allocated memory was 302.0 MB in the beginning and 436.2 MB in the end (delta: 134.2 MB). Free memory was 277.5 MB in the beginning and 281.9 MB in the end (delta: -4.4 MB). Peak memory consumption was 132.2 MB. Max. memory is 16.0 GB. [2020-11-11 21:34:47,373 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 302.0 MB. Free memory is still 272.3 MB. There was no memory consumed. Max. memory is 16.0 GB. [2020-11-11 21:34:47,373 INFO L168 Benchmark]: CACSL2BoogieTranslator took 640.71 ms. Allocated memory is still 302.0 MB. Free memory was 276.8 MB in the beginning and 247.8 MB in the end (delta: 29.0 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. [2020-11-11 21:34:47,374 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.87 ms. Allocated memory is still 302.0 MB. Free memory was 247.8 MB in the beginning and 246.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-11 21:34:47,374 INFO L168 Benchmark]: Boogie Preprocessor took 41.14 ms. Allocated memory is still 302.0 MB. Free memory was 246.1 MB in the beginning and 244.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-11 21:34:47,374 INFO L168 Benchmark]: RCFGBuilder took 596.47 ms. Allocated memory is still 302.0 MB. Free memory was 244.7 MB in the beginning and 267.4 MB in the end (delta: -22.7 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.0 GB. [2020-11-11 21:34:47,375 INFO L168 Benchmark]: TraceAbstraction took 24375.65 ms. Allocated memory was 302.0 MB in the beginning and 436.2 MB in the end (delta: 134.2 MB). Free memory was 267.4 MB in the beginning and 281.9 MB in the end (delta: -14.5 MB). Peak memory consumption was 120.8 MB. Max. memory is 16.0 GB. [2020-11-11 21:34:47,377 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 302.0 MB. Free memory is still 272.3 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 640.71 ms. Allocated memory is still 302.0 MB. Free memory was 276.8 MB in the beginning and 247.8 MB in the end (delta: 29.0 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 45.87 ms. Allocated memory is still 302.0 MB. Free memory was 247.8 MB in the beginning and 246.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 41.14 ms. Allocated memory is still 302.0 MB. Free memory was 246.1 MB in the beginning and 244.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 596.47 ms. Allocated memory is still 302.0 MB. Free memory was 244.7 MB in the beginning and 267.4 MB in the end (delta: -22.7 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 24375.65 ms. Allocated memory was 302.0 MB in the beginning and 436.2 MB in the end (delta: 134.2 MB). Free memory was 267.4 MB in the beginning and 281.9 MB in the end (delta: -14.5 MB). Peak memory consumption was 120.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 777 VarBasedMoverChecksPositive, 15 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 15 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 21 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 3.7s, 65 PlacesBefore, 20 PlacesAfterwards, 64 TransitionsBefore, 16 TransitionsAfterwards, 1144 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 12 ConcurrentYvCompositions, 3 ChoiceCompositions, 63 TotalNumberOfCompositions, 1130 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: 24.2s, OverallIterations: 31, TraceHistogramMax: 6, AutomataDifference: 8.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.7s, HoareTripleCheckerStatistics: 504 SDtfs, 1391 SDslu, 1468 SDs, 0 SdLazy, 1612 SolverSat, 773 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 883 GetRequests, 314 SyntacticMatches, 24 SemanticMatches, 545 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2511 ImplicationChecksByTransitivity, 7.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 31 MinimizatonAttempts, 420 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 816 NumberOfCodeBlocks, 813 NumberOfCodeBlocksAsserted, 100 NumberOfCheckSat, 759 ConstructedInterpolants, 0 QuantifiedInterpolants, 43819 SizeOfPredicates, 156 NumberOfNonLiveVariables, 2867 ConjunctsInSsa, 269 ConjunctsInUnsatCore, 57 InterpolantComputations, 7 PerfectInterpolantSequences, 62/520 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...