/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/stack_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 18:11:35,676 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 18:11:35,678 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 18:11:35,707 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 18:11:35,747 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 18:11:35,748 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 18:11:35,748 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 18:11:35,749 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-NoLbe.epf [2021-06-05 18:11:35,775 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 18:11:35,775 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 18:11:35,776 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 18:11:35,776 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 18:11:35,777 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 18:11:35,778 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 18:11:35,778 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 18:11:35,778 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 18:11:35,778 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 18:11:35,778 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 18:11:35,779 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 18:11:35,779 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 18:11:35,779 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 18:11:35,779 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 18:11:35,779 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 18:11:35,779 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 18:11:35,779 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 18:11:35,779 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 18:11:35,779 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 18:11:35,780 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 18:11:35,780 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 18:11:35,780 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 18:11:35,780 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 18:11:35,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 18:11:35,780 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 18:11:35,780 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 18:11:35,780 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 18:11:35,780 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 18:11:35,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 18:11:35,781 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 18:11:35,781 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 18:11:35,781 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 18:11:36,047 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 18:11:36,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 18:11:36,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 18:11:36,063 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-05 18:11:36,064 INFO L275 PluginConnector]: CDTParser initialized [2021-06-05 18:11:36,064 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-1.i [2021-06-05 18:11:36,117 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f0ece290/53eb805dbaa84475921e065fb717e8eb/FLAGfdc28e84b [2021-06-05 18:11:36,525 INFO L306 CDTParser]: Found 1 translation units. [2021-06-05 18:11:36,525 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-1.i [2021-06-05 18:11:36,539 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f0ece290/53eb805dbaa84475921e065fb717e8eb/FLAGfdc28e84b [2021-06-05 18:11:36,855 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f0ece290/53eb805dbaa84475921e065fb717e8eb [2021-06-05 18:11:36,857 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 18:11:36,858 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-05 18:11:36,875 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-05 18:11:36,875 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-05 18:11:36,878 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-05 18:11:36,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 06:11:36" (1/1) ... [2021-06-05 18:11:36,893 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16312430 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:11:36, skipping insertion in model container [2021-06-05 18:11:36,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 06:11:36" (1/1) ... [2021-06-05 18:11:36,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-05 18:11:36,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-05 18:11:37,217 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-1.i[41530,41543] [2021-06-05 18:11:37,268 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 18:11:37,284 INFO L203 MainTranslator]: Completed pre-run [2021-06-05 18:11:37,305 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-1.i[41530,41543] [2021-06-05 18:11:37,311 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 18:11:37,407 INFO L208 MainTranslator]: Completed translation [2021-06-05 18:11:37,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:11:37 WrapperNode [2021-06-05 18:11:37,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-05 18:11:37,409 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 18:11:37,410 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 18:11:37,410 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 18:11:37,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:11:37" (1/1) ... [2021-06-05 18:11:37,446 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:11:37" (1/1) ... [2021-06-05 18:11:37,470 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 18:11:37,470 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 18:11:37,470 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 18:11:37,471 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 18:11:37,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:11:37" (1/1) ... [2021-06-05 18:11:37,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:11:37" (1/1) ... [2021-06-05 18:11:37,489 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:11:37" (1/1) ... [2021-06-05 18:11:37,489 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:11:37" (1/1) ... [2021-06-05 18:11:37,498 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:11:37" (1/1) ... [2021-06-05 18:11:37,501 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:11:37" (1/1) ... [2021-06-05 18:11:37,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:11:37" (1/1) ... [2021-06-05 18:11:37,504 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 18:11:37,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 18:11:37,505 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 18:11:37,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 18:11:37,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:11:37" (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 [2021-06-05 18:11:37,553 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-06-05 18:11:37,553 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-06-05 18:11:37,554 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-06-05 18:11:37,554 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-06-05 18:11:37,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-05 18:11:37,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-05 18:11:37,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-06-05 18:11:37,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-05 18:11:37,555 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2021-06-05 18:11:37,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-05 18:11:37,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 18:11:37,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 18:11:37,556 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 18:11:38,003 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 18:11:38,003 INFO L299 CfgBuilder]: Removed 26 assume(true) statements. [2021-06-05 18:11:38,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:11:38 BoogieIcfgContainer [2021-06-05 18:11:38,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 18:11:38,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 18:11:38,006 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 18:11:38,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 18:11:38,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.06 06:11:36" (1/3) ... [2021-06-05 18:11:38,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37bdbda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:11:38, skipping insertion in model container [2021-06-05 18:11:38,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:11:37" (2/3) ... [2021-06-05 18:11:38,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37bdbda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:11:38, skipping insertion in model container [2021-06-05 18:11:38,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:11:38" (3/3) ... [2021-06-05 18:11:38,009 INFO L111 eAbstractionObserver]: Analyzing ICFG stack_longest-1.i [2021-06-05 18:11:38,013 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 18:11:38,013 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 18:11:38,013 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-06-05 18:11:38,013 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 18:11:38,036 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,036 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,036 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,036 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,037 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,037 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,037 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,037 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,037 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,037 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,037 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,037 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,037 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,037 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,038 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,038 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,038 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,038 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,038 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,038 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,038 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,038 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,038 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,039 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,039 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,039 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,039 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,039 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,039 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,039 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,039 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,039 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,040 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,040 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,040 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,040 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,040 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,040 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,040 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,040 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,041 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,041 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,041 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,041 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,041 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,041 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,041 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,041 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,041 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,041 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,042 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,042 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,042 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,042 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,042 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,042 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,042 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,042 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,042 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,043 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,043 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,043 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,043 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,043 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,043 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,043 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,043 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,043 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,043 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,043 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,044 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,044 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,044 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,044 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,044 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,044 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,044 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,044 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,044 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,044 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,045 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,045 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,045 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,045 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,045 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,045 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,045 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,045 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,045 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,046 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,046 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,046 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,046 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,046 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,046 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,046 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,046 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,046 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,047 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,047 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,047 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,047 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,047 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,047 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,047 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,047 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,047 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,047 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,048 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,048 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,048 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,048 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,048 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,048 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,048 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,048 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,048 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,049 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,049 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,049 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,049 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,049 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,049 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,049 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,049 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,049 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,050 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,050 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,050 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,050 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,050 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,050 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,050 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,050 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,050 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,050 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,051 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,051 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,051 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,051 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,051 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,051 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,051 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,052 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,052 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,052 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,052 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,052 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,052 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,052 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,052 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,052 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,053 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,053 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,053 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,053 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,053 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,053 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,053 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,053 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,053 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,054 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,054 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,054 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,054 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,054 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,054 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,054 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,054 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,054 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,054 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,055 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,055 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,055 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,055 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,055 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,055 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,055 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,055 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,055 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,055 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,055 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,055 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,056 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,056 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,056 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,056 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,056 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,056 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,056 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,056 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,056 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,056 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,056 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,057 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,057 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,057 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,057 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,057 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,057 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,057 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,057 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,057 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,057 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,057 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,058 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,058 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,058 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,058 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,058 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,058 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,058 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,058 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,058 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,058 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,059 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,059 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,059 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,059 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,059 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,059 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,059 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,059 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,059 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,059 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,060 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,060 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,060 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,060 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,060 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,060 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,060 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,060 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,060 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,061 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,061 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,061 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,061 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,061 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,061 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,061 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,061 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,061 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,061 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,062 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,062 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,062 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,062 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,062 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,062 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,062 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,062 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,062 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,062 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,063 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,063 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,063 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,063 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,063 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,063 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,063 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,063 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,063 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,063 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,064 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,064 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,065 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,065 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,065 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,065 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,066 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,066 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,066 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,066 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,066 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,066 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,066 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,066 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,066 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,066 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,066 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,066 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,066 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,067 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,067 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,069 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,069 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,069 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,069 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,069 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,069 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,070 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,070 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,070 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,070 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,070 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,070 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,070 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,070 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,070 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,070 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,070 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,070 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,070 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,070 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,071 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,071 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,071 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:11:38,075 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 18:11:38,089 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 18:11:38,101 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 18:11:38,101 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 18:11:38,101 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 18:11:38,101 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 18:11:38,101 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 18:11:38,101 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 18:11:38,101 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 18:11:38,101 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == t1Thread1of1ForFork1======== [2021-06-05 18:11:38,109 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 152 places, 157 transitions, 336 flow [2021-06-05 18:11:38,383 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 9831 states, 9827 states have (on average 2.8614022590821206) internal successors, (28119), 9830 states have internal predecessors, (28119), 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) [2021-06-05 18:11:38,415 INFO L276 IsEmpty]: Start isEmpty. Operand has 9831 states, 9827 states have (on average 2.8614022590821206) internal successors, (28119), 9830 states have internal predecessors, (28119), 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) [2021-06-05 18:11:38,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 18:11:38,444 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:38,445 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:38,445 INFO L430 AbstractCegarLoop]: === Iteration 1 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:38,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:38,452 INFO L82 PathProgramCache]: Analyzing trace with hash -58151633, now seen corresponding path program 1 times [2021-06-05 18:11:38,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:38,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386997801] [2021-06-05 18:11:38,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:38,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:38,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:38,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386997801] [2021-06-05 18:11:38,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386997801] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:11:38,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:11:38,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 18:11:38,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597409906] [2021-06-05 18:11:38,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 18:11:38,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:38,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 18:11:38,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 18:11:38,704 INFO L87 Difference]: Start difference. First operand has 9831 states, 9827 states have (on average 2.8614022590821206) internal successors, (28119), 9830 states have internal predecessors, (28119), 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 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2021-06-05 18:11:38,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:38,844 INFO L93 Difference]: Finished difference Result 14511 states and 39963 transitions. [2021-06-05 18:11:38,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 18:11:38,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 54 [2021-06-05 18:11:38,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:38,911 INFO L225 Difference]: With dead ends: 14511 [2021-06-05 18:11:38,911 INFO L226 Difference]: Without dead ends: 12844 [2021-06-05 18:11:38,912 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 18:11:38,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12844 states. [2021-06-05 18:11:39,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12844 to 11431. [2021-06-05 18:11:39,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11431 states, 11429 states have (on average 2.7715460670224865) internal successors, (31676), 11430 states have internal predecessors, (31676), 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) [2021-06-05 18:11:39,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11431 states to 11431 states and 31676 transitions. [2021-06-05 18:11:39,411 INFO L78 Accepts]: Start accepts. Automaton has 11431 states and 31676 transitions. Word has length 54 [2021-06-05 18:11:39,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:39,411 INFO L482 AbstractCegarLoop]: Abstraction has 11431 states and 31676 transitions. [2021-06-05 18:11:39,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2021-06-05 18:11:39,411 INFO L276 IsEmpty]: Start isEmpty. Operand 11431 states and 31676 transitions. [2021-06-05 18:11:39,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-05 18:11:39,418 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:39,418 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:39,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 18:11:39,419 INFO L430 AbstractCegarLoop]: === Iteration 2 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:39,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:39,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1737064523, now seen corresponding path program 1 times [2021-06-05 18:11:39,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:39,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557241934] [2021-06-05 18:11:39,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:39,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:39,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:39,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:39,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557241934] [2021-06-05 18:11:39,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557241934] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:11:39,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:11:39,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 18:11:39,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953955879] [2021-06-05 18:11:39,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 18:11:39,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:39,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 18:11:39,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 18:11:39,494 INFO L87 Difference]: Start difference. First operand 11431 states and 31676 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2021-06-05 18:11:39,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:39,655 INFO L93 Difference]: Finished difference Result 15291 states and 42316 transitions. [2021-06-05 18:11:39,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 18:11:39,655 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 63 [2021-06-05 18:11:39,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:39,703 INFO L225 Difference]: With dead ends: 15291 [2021-06-05 18:11:39,703 INFO L226 Difference]: Without dead ends: 15291 [2021-06-05 18:11:39,704 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 18:11:39,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15291 states. [2021-06-05 18:11:40,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15291 to 12010. [2021-06-05 18:11:40,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12010 states, 12008 states have (on average 2.770819453697535) internal successors, (33272), 12009 states have internal predecessors, (33272), 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) [2021-06-05 18:11:40,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12010 states to 12010 states and 33272 transitions. [2021-06-05 18:11:40,077 INFO L78 Accepts]: Start accepts. Automaton has 12010 states and 33272 transitions. Word has length 63 [2021-06-05 18:11:40,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:40,078 INFO L482 AbstractCegarLoop]: Abstraction has 12010 states and 33272 transitions. [2021-06-05 18:11:40,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2021-06-05 18:11:40,078 INFO L276 IsEmpty]: Start isEmpty. Operand 12010 states and 33272 transitions. [2021-06-05 18:11:40,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:11:40,094 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:40,094 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:40,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 18:11:40,095 INFO L430 AbstractCegarLoop]: === Iteration 3 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:40,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:40,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1966231402, now seen corresponding path program 1 times [2021-06-05 18:11:40,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:40,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706634572] [2021-06-05 18:11:40,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:40,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:40,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:40,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:40,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706634572] [2021-06-05 18:11:40,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706634572] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:11:40,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:11:40,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 18:11:40,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869705758] [2021-06-05 18:11:40,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 18:11:40,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:40,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 18:11:40,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 18:11:40,230 INFO L87 Difference]: Start difference. First operand 12010 states and 33272 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 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) [2021-06-05 18:11:40,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:40,262 INFO L93 Difference]: Finished difference Result 5338 states and 13928 transitions. [2021-06-05 18:11:40,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 18:11:40,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 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) Word has length 80 [2021-06-05 18:11:40,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:40,271 INFO L225 Difference]: With dead ends: 5338 [2021-06-05 18:11:40,271 INFO L226 Difference]: Without dead ends: 5158 [2021-06-05 18:11:40,271 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 18:11:40,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5158 states. [2021-06-05 18:11:40,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5158 to 5062. [2021-06-05 18:11:40,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5062 states, 5060 states have (on average 2.6104743083003954) internal successors, (13209), 5061 states have internal predecessors, (13209), 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) [2021-06-05 18:11:40,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5062 states to 5062 states and 13209 transitions. [2021-06-05 18:11:40,390 INFO L78 Accepts]: Start accepts. Automaton has 5062 states and 13209 transitions. Word has length 80 [2021-06-05 18:11:40,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:40,390 INFO L482 AbstractCegarLoop]: Abstraction has 5062 states and 13209 transitions. [2021-06-05 18:11:40,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 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) [2021-06-05 18:11:40,391 INFO L276 IsEmpty]: Start isEmpty. Operand 5062 states and 13209 transitions. [2021-06-05 18:11:40,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-06-05 18:11:40,399 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:40,400 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:40,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 18:11:40,400 INFO L430 AbstractCegarLoop]: === Iteration 4 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:40,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:40,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1751726349, now seen corresponding path program 1 times [2021-06-05 18:11:40,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:40,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207456517] [2021-06-05 18:11:40,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:40,480 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:40,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:40,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207456517] [2021-06-05 18:11:40,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207456517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:40,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128743900] [2021-06-05 18:11:40,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:40,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:40,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 18:11:40,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:40,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128743900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:40,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:40,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 18:11:40,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26740467] [2021-06-05 18:11:40,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 18:11:40,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:40,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 18:11:40,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 18:11:40,811 INFO L87 Difference]: Start difference. First operand 5062 states and 13209 transitions. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 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) [2021-06-05 18:11:40,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:40,885 INFO L93 Difference]: Finished difference Result 7950 states and 20630 transitions. [2021-06-05 18:11:40,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 18:11:40,886 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 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 89 [2021-06-05 18:11:40,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:40,899 INFO L225 Difference]: With dead ends: 7950 [2021-06-05 18:11:40,899 INFO L226 Difference]: Without dead ends: 7950 [2021-06-05 18:11:40,899 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 18:11:40,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7950 states. [2021-06-05 18:11:41,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7950 to 7297. [2021-06-05 18:11:41,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7297 states, 7295 states have (on average 2.599451679232351) internal successors, (18963), 7296 states have internal predecessors, (18963), 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) [2021-06-05 18:11:41,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7297 states to 7297 states and 18963 transitions. [2021-06-05 18:11:41,050 INFO L78 Accepts]: Start accepts. Automaton has 7297 states and 18963 transitions. Word has length 89 [2021-06-05 18:11:41,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:41,051 INFO L482 AbstractCegarLoop]: Abstraction has 7297 states and 18963 transitions. [2021-06-05 18:11:41,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 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) [2021-06-05 18:11:41,051 INFO L276 IsEmpty]: Start isEmpty. Operand 7297 states and 18963 transitions. [2021-06-05 18:11:41,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-06-05 18:11:41,060 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:41,061 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:41,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:41,279 INFO L430 AbstractCegarLoop]: === Iteration 5 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:41,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:41,279 INFO L82 PathProgramCache]: Analyzing trace with hash 556490672, now seen corresponding path program 1 times [2021-06-05 18:11:41,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:41,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103544559] [2021-06-05 18:11:41,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:41,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:41,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:41,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103544559] [2021-06-05 18:11:41,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103544559] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:11:41,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:11:41,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 18:11:41,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337147615] [2021-06-05 18:11:41,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 18:11:41,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:41,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 18:11:41,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 18:11:41,330 INFO L87 Difference]: Start difference. First operand 7297 states and 18963 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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) [2021-06-05 18:11:41,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:41,412 INFO L93 Difference]: Finished difference Result 10552 states and 27328 transitions. [2021-06-05 18:11:41,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 18:11:41,413 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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 94 [2021-06-05 18:11:41,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:41,430 INFO L225 Difference]: With dead ends: 10552 [2021-06-05 18:11:41,430 INFO L226 Difference]: Without dead ends: 10552 [2021-06-05 18:11:41,430 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 18:11:41,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10552 states. [2021-06-05 18:11:41,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10552 to 6645. [2021-06-05 18:11:41,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6645 states, 6643 states have (on average 2.577600481710071) internal successors, (17123), 6644 states have internal predecessors, (17123), 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) [2021-06-05 18:11:41,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6645 states to 6645 states and 17123 transitions. [2021-06-05 18:11:41,607 INFO L78 Accepts]: Start accepts. Automaton has 6645 states and 17123 transitions. Word has length 94 [2021-06-05 18:11:41,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:41,608 INFO L482 AbstractCegarLoop]: Abstraction has 6645 states and 17123 transitions. [2021-06-05 18:11:41,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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) [2021-06-05 18:11:41,608 INFO L276 IsEmpty]: Start isEmpty. Operand 6645 states and 17123 transitions. [2021-06-05 18:11:41,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-06-05 18:11:41,623 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:41,623 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:41,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 18:11:41,623 INFO L430 AbstractCegarLoop]: === Iteration 6 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:41,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:41,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1829261201, now seen corresponding path program 2 times [2021-06-05 18:11:41,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:41,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341603553] [2021-06-05 18:11:41,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:41,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:41,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:41,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341603553] [2021-06-05 18:11:41,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341603553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:41,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034875936] [2021-06-05 18:11:41,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:41,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:11:41,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:41,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 18:11:41,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:42,088 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:42,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034875936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:42,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:42,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 18:11:42,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117886095] [2021-06-05 18:11:42,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 18:11:42,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:42,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 18:11:42,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 18:11:42,090 INFO L87 Difference]: Start difference. First operand 6645 states and 17123 transitions. Second operand has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 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) [2021-06-05 18:11:42,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:42,185 INFO L93 Difference]: Finished difference Result 9517 states and 24500 transitions. [2021-06-05 18:11:42,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 18:11:42,185 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 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 124 [2021-06-05 18:11:42,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:42,199 INFO L225 Difference]: With dead ends: 9517 [2021-06-05 18:11:42,199 INFO L226 Difference]: Without dead ends: 9517 [2021-06-05 18:11:42,200 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:11:42,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9517 states. [2021-06-05 18:11:42,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9517 to 8880. [2021-06-05 18:11:42,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8880 states, 8878 states have (on average 2.576819103401667) internal successors, (22877), 8879 states have internal predecessors, (22877), 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) [2021-06-05 18:11:42,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8880 states to 8880 states and 22877 transitions. [2021-06-05 18:11:42,378 INFO L78 Accepts]: Start accepts. Automaton has 8880 states and 22877 transitions. Word has length 124 [2021-06-05 18:11:42,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:42,378 INFO L482 AbstractCegarLoop]: Abstraction has 8880 states and 22877 transitions. [2021-06-05 18:11:42,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 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) [2021-06-05 18:11:42,378 INFO L276 IsEmpty]: Start isEmpty. Operand 8880 states and 22877 transitions. [2021-06-05 18:11:42,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-06-05 18:11:42,390 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:42,391 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:42,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:42,607 INFO L430 AbstractCegarLoop]: === Iteration 7 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:42,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:42,607 INFO L82 PathProgramCache]: Analyzing trace with hash 449040744, now seen corresponding path program 1 times [2021-06-05 18:11:42,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:42,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670837974] [2021-06-05 18:11:42,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:42,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:42,670 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:42,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:42,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670837974] [2021-06-05 18:11:42,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670837974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:42,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568204205] [2021-06-05 18:11:42,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:42,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:42,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 18:11:42,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 18:11:42,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568204205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:42,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:42,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-06-05 18:11:42,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621918551] [2021-06-05 18:11:42,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 18:11:42,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:42,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 18:11:42,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 18:11:42,935 INFO L87 Difference]: Start difference. First operand 8880 states and 22877 transitions. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 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) [2021-06-05 18:11:43,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:43,055 INFO L93 Difference]: Finished difference Result 12150 states and 31382 transitions. [2021-06-05 18:11:43,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 18:11:43,055 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 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 129 [2021-06-05 18:11:43,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:43,071 INFO L225 Difference]: With dead ends: 12150 [2021-06-05 18:11:43,071 INFO L226 Difference]: Without dead ends: 12150 [2021-06-05 18:11:43,071 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:11:43,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12150 states. [2021-06-05 18:11:43,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12150 to 10700. [2021-06-05 18:11:43,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10700 states, 10698 states have (on average 2.598429613011778) internal successors, (27798), 10699 states have internal predecessors, (27798), 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) [2021-06-05 18:11:43,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10700 states to 10700 states and 27798 transitions. [2021-06-05 18:11:43,272 INFO L78 Accepts]: Start accepts. Automaton has 10700 states and 27798 transitions. Word has length 129 [2021-06-05 18:11:43,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:43,273 INFO L482 AbstractCegarLoop]: Abstraction has 10700 states and 27798 transitions. [2021-06-05 18:11:43,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 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) [2021-06-05 18:11:43,273 INFO L276 IsEmpty]: Start isEmpty. Operand 10700 states and 27798 transitions. [2021-06-05 18:11:43,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-06-05 18:11:43,295 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:43,295 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:43,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:43,512 INFO L430 AbstractCegarLoop]: === Iteration 8 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:43,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:43,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1360096717, now seen corresponding path program 3 times [2021-06-05 18:11:43,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:43,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570444701] [2021-06-05 18:11:43,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:43,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:43,585 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:43,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:43,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570444701] [2021-06-05 18:11:43,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570444701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:43,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966802530] [2021-06-05 18:11:43,585 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 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 [2021-06-05 18:11:43,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 18:11:43,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:43,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 18:11:43,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:43,882 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:43,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966802530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:43,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:43,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 18:11:43,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741781808] [2021-06-05 18:11:43,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 18:11:43,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:43,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 18:11:43,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 18:11:43,884 INFO L87 Difference]: Start difference. First operand 10700 states and 27798 transitions. Second operand has 11 states, 11 states have (on average 18.727272727272727) internal successors, (206), 11 states have internal predecessors, (206), 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) [2021-06-05 18:11:44,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:44,003 INFO L93 Difference]: Finished difference Result 14707 states and 37949 transitions. [2021-06-05 18:11:44,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 18:11:44,003 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 18.727272727272727) internal successors, (206), 11 states have internal predecessors, (206), 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 159 [2021-06-05 18:11:44,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:44,020 INFO L225 Difference]: With dead ends: 14707 [2021-06-05 18:11:44,020 INFO L226 Difference]: Without dead ends: 14707 [2021-06-05 18:11:44,021 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:11:44,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14707 states. [2021-06-05 18:11:44,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14707 to 12935. [2021-06-05 18:11:44,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12935 states, 12933 states have (on average 2.5942936673625607) internal successors, (33552), 12934 states have internal predecessors, (33552), 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) [2021-06-05 18:11:44,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12935 states to 12935 states and 33552 transitions. [2021-06-05 18:11:44,267 INFO L78 Accepts]: Start accepts. Automaton has 12935 states and 33552 transitions. Word has length 159 [2021-06-05 18:11:44,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:44,267 INFO L482 AbstractCegarLoop]: Abstraction has 12935 states and 33552 transitions. [2021-06-05 18:11:44,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 18.727272727272727) internal successors, (206), 11 states have internal predecessors, (206), 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) [2021-06-05 18:11:44,267 INFO L276 IsEmpty]: Start isEmpty. Operand 12935 states and 33552 transitions. [2021-06-05 18:11:44,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-06-05 18:11:44,284 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:44,284 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:44,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:44,489 INFO L430 AbstractCegarLoop]: === Iteration 9 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:44,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:44,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1870546096, now seen corresponding path program 2 times [2021-06-05 18:11:44,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:44,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29344803] [2021-06-05 18:11:44,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:44,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:44,565 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 18:11:44,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:44,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29344803] [2021-06-05 18:11:44,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29344803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:44,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875159611] [2021-06-05 18:11:44,565 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 [2021-06-05 18:11:44,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:11:44,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:44,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 18:11:44,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 18:11:44,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875159611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:44,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:44,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 18:11:44,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580899296] [2021-06-05 18:11:44,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 18:11:44,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:44,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 18:11:44,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:11:44,886 INFO L87 Difference]: Start difference. First operand 12935 states and 33552 transitions. Second operand has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 states have internal predecessors, (202), 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) [2021-06-05 18:11:45,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:45,013 INFO L93 Difference]: Finished difference Result 17340 states and 44831 transitions. [2021-06-05 18:11:45,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 18:11:45,013 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 states have internal predecessors, (202), 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 164 [2021-06-05 18:11:45,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:45,035 INFO L225 Difference]: With dead ends: 17340 [2021-06-05 18:11:45,036 INFO L226 Difference]: Without dead ends: 17340 [2021-06-05 18:11:45,036 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:11:45,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17340 states. [2021-06-05 18:11:45,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17340 to 12935. [2021-06-05 18:11:45,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12935 states, 12933 states have (on average 2.5942936673625607) internal successors, (33552), 12934 states have internal predecessors, (33552), 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) [2021-06-05 18:11:45,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12935 states to 12935 states and 33552 transitions. [2021-06-05 18:11:45,258 INFO L78 Accepts]: Start accepts. Automaton has 12935 states and 33552 transitions. Word has length 164 [2021-06-05 18:11:45,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:45,258 INFO L482 AbstractCegarLoop]: Abstraction has 12935 states and 33552 transitions. [2021-06-05 18:11:45,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 states have internal predecessors, (202), 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) [2021-06-05 18:11:45,258 INFO L276 IsEmpty]: Start isEmpty. Operand 12935 states and 33552 transitions. [2021-06-05 18:11:45,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-06-05 18:11:45,277 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:45,277 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:45,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:45,493 INFO L430 AbstractCegarLoop]: === Iteration 10 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:45,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:45,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1339210833, now seen corresponding path program 4 times [2021-06-05 18:11:45,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:45,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648590162] [2021-06-05 18:11:45,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:45,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:45,605 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:45,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:45,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648590162] [2021-06-05 18:11:45,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648590162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:45,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720185170] [2021-06-05 18:11:45,606 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 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 [2021-06-05 18:11:45,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:11:45,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:45,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 18:11:45,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:45,991 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:45,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720185170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:45,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:45,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 18:11:45,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919636463] [2021-06-05 18:11:45,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:11:45,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:45,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:11:45,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:11:45,993 INFO L87 Difference]: Start difference. First operand 12935 states and 33552 transitions. Second operand has 13 states, 13 states have (on average 18.53846153846154) internal successors, (241), 13 states have internal predecessors, (241), 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) [2021-06-05 18:11:46,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:46,156 INFO L93 Difference]: Finished difference Result 17022 states and 43907 transitions. [2021-06-05 18:11:46,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 18:11:46,156 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 18.53846153846154) internal successors, (241), 13 states have internal predecessors, (241), 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 194 [2021-06-05 18:11:46,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:46,224 INFO L225 Difference]: With dead ends: 17022 [2021-06-05 18:11:46,224 INFO L226 Difference]: Without dead ends: 17022 [2021-06-05 18:11:46,225 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:11:46,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17022 states. [2021-06-05 18:11:46,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17022 to 15170. [2021-06-05 18:11:46,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15170 states, 15168 states have (on average 2.591376582278481) internal successors, (39306), 15169 states have internal predecessors, (39306), 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) [2021-06-05 18:11:46,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15170 states to 15170 states and 39306 transitions. [2021-06-05 18:11:46,437 INFO L78 Accepts]: Start accepts. Automaton has 15170 states and 39306 transitions. Word has length 194 [2021-06-05 18:11:46,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:46,438 INFO L482 AbstractCegarLoop]: Abstraction has 15170 states and 39306 transitions. [2021-06-05 18:11:46,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 18.53846153846154) internal successors, (241), 13 states have internal predecessors, (241), 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) [2021-06-05 18:11:46,438 INFO L276 IsEmpty]: Start isEmpty. Operand 15170 states and 39306 transitions. [2021-06-05 18:11:46,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-06-05 18:11:46,455 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:46,455 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:46,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:46,671 INFO L430 AbstractCegarLoop]: === Iteration 11 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:46,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:46,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1465987992, now seen corresponding path program 3 times [2021-06-05 18:11:46,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:46,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241170281] [2021-06-05 18:11:46,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:46,750 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 136 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 18:11:46,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:46,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241170281] [2021-06-05 18:11:46,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241170281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:46,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611656207] [2021-06-05 18:11:46,751 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 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 [2021-06-05 18:11:46,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 18:11:46,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:46,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 18:11:46,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-06-05 18:11:47,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611656207] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:11:47,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 18:11:47,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2021-06-05 18:11:47,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783747396] [2021-06-05 18:11:47,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 18:11:47,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:47,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 18:11:47,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:11:47,127 INFO L87 Difference]: Start difference. First operand 15170 states and 39306 transitions. Second operand has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 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) [2021-06-05 18:11:47,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:47,280 INFO L93 Difference]: Finished difference Result 19600 states and 50777 transitions. [2021-06-05 18:11:47,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 18:11:47,281 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 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 199 [2021-06-05 18:11:47,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:47,303 INFO L225 Difference]: With dead ends: 19600 [2021-06-05 18:11:47,303 INFO L226 Difference]: Without dead ends: 19600 [2021-06-05 18:11:47,303 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 108.1ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:11:47,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19600 states. [2021-06-05 18:11:47,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19600 to 16390. [2021-06-05 18:11:47,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16390 states, 16388 states have (on average 2.5980595557725166) internal successors, (42577), 16389 states have internal predecessors, (42577), 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) [2021-06-05 18:11:47,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16390 states to 16390 states and 42577 transitions. [2021-06-05 18:11:47,559 INFO L78 Accepts]: Start accepts. Automaton has 16390 states and 42577 transitions. Word has length 199 [2021-06-05 18:11:47,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:47,560 INFO L482 AbstractCegarLoop]: Abstraction has 16390 states and 42577 transitions. [2021-06-05 18:11:47,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 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) [2021-06-05 18:11:47,560 INFO L276 IsEmpty]: Start isEmpty. Operand 16390 states and 42577 transitions. [2021-06-05 18:11:47,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-06-05 18:11:47,578 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:47,578 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:47,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:47,794 INFO L430 AbstractCegarLoop]: === Iteration 12 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:47,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:47,795 INFO L82 PathProgramCache]: Analyzing trace with hash 987938280, now seen corresponding path program 4 times [2021-06-05 18:11:47,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:47,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344061441] [2021-06-05 18:11:47,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:47,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:47,872 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 138 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 18:11:47,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:47,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344061441] [2021-06-05 18:11:47,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344061441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:47,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067161957] [2021-06-05 18:11:47,872 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 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 [2021-06-05 18:11:47,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:11:47,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:47,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 18:11:47,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:48,194 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 115 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:11:48,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067161957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:48,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:48,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-06-05 18:11:48,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690991157] [2021-06-05 18:11:48,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 18:11:48,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:48,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 18:11:48,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:11:48,195 INFO L87 Difference]: Start difference. First operand 16390 states and 42577 transitions. Second operand has 10 states, 10 states have (on average 21.5) internal successors, (215), 10 states have internal predecessors, (215), 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) [2021-06-05 18:11:48,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:48,351 INFO L93 Difference]: Finished difference Result 21425 states and 55669 transitions. [2021-06-05 18:11:48,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 18:11:48,351 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 21.5) internal successors, (215), 10 states have internal predecessors, (215), 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 199 [2021-06-05 18:11:48,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:48,376 INFO L225 Difference]: With dead ends: 21425 [2021-06-05 18:11:48,376 INFO L226 Difference]: Without dead ends: 21425 [2021-06-05 18:11:48,376 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:11:48,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21425 states. [2021-06-05 18:11:48,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21425 to 18210. [2021-06-05 18:11:48,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18210 states, 18208 states have (on average 2.608633567662566) internal successors, (47498), 18209 states have internal predecessors, (47498), 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) [2021-06-05 18:11:48,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18210 states to 18210 states and 47498 transitions. [2021-06-05 18:11:48,746 INFO L78 Accepts]: Start accepts. Automaton has 18210 states and 47498 transitions. Word has length 199 [2021-06-05 18:11:48,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:48,746 INFO L482 AbstractCegarLoop]: Abstraction has 18210 states and 47498 transitions. [2021-06-05 18:11:48,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 21.5) internal successors, (215), 10 states have internal predecessors, (215), 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) [2021-06-05 18:11:48,747 INFO L276 IsEmpty]: Start isEmpty. Operand 18210 states and 47498 transitions. [2021-06-05 18:11:48,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-06-05 18:11:48,767 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:48,767 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:48,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 18:11:48,986 INFO L430 AbstractCegarLoop]: === Iteration 13 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:48,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:48,986 INFO L82 PathProgramCache]: Analyzing trace with hash 485036685, now seen corresponding path program 5 times [2021-06-05 18:11:48,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:48,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139893929] [2021-06-05 18:11:48,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:49,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:49,096 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:49,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:49,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139893929] [2021-06-05 18:11:49,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139893929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:49,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347494244] [2021-06-05 18:11:49,097 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 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 [2021-06-05 18:11:49,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 18:11:49,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:49,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:11:49,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:49,548 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:49,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347494244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:49,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:49,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 18:11:49,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10980019] [2021-06-05 18:11:49,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:11:49,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:49,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:11:49,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:11:49,549 INFO L87 Difference]: Start difference. First operand 18210 states and 47498 transitions. Second operand has 15 states, 15 states have (on average 18.4) internal successors, (276), 15 states have internal predecessors, (276), 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) [2021-06-05 18:11:49,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:49,767 INFO L93 Difference]: Finished difference Result 23982 states and 62236 transitions. [2021-06-05 18:11:49,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 18:11:49,767 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 18.4) internal successors, (276), 15 states have internal predecessors, (276), 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 229 [2021-06-05 18:11:49,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:49,793 INFO L225 Difference]: With dead ends: 23982 [2021-06-05 18:11:49,793 INFO L226 Difference]: Without dead ends: 23982 [2021-06-05 18:11:49,793 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 127.3ms TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:11:49,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23982 states. [2021-06-05 18:11:50,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23982 to 20445. [2021-06-05 18:11:50,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20445 states, 20443 states have (on average 2.6049014332534366) internal successors, (53252), 20444 states have internal predecessors, (53252), 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) [2021-06-05 18:11:50,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20445 states to 20445 states and 53252 transitions. [2021-06-05 18:11:50,132 INFO L78 Accepts]: Start accepts. Automaton has 20445 states and 53252 transitions. Word has length 229 [2021-06-05 18:11:50,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:50,132 INFO L482 AbstractCegarLoop]: Abstraction has 20445 states and 53252 transitions. [2021-06-05 18:11:50,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 18.4) internal successors, (276), 15 states have internal predecessors, (276), 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) [2021-06-05 18:11:50,133 INFO L276 IsEmpty]: Start isEmpty. Operand 20445 states and 53252 transitions. [2021-06-05 18:11:50,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-06-05 18:11:50,155 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:50,155 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:50,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:50,366 INFO L430 AbstractCegarLoop]: === Iteration 14 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:50,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:50,366 INFO L82 PathProgramCache]: Analyzing trace with hash -187226553, now seen corresponding path program 1 times [2021-06-05 18:11:50,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:50,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845895557] [2021-06-05 18:11:50,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:50,460 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 54 proven. 122 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 18:11:50,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:50,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845895557] [2021-06-05 18:11:50,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845895557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:50,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856207031] [2021-06-05 18:11:50,461 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2021-06-05 18:11:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:50,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:11:50,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:50,860 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 54 proven. 122 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 18:11:50,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856207031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:50,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:50,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 18:11:50,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131476265] [2021-06-05 18:11:50,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:11:50,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:50,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:11:50,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:11:50,862 INFO L87 Difference]: Start difference. First operand 20445 states and 53252 transitions. Second operand has 13 states, 13 states have (on average 20.846153846153847) internal successors, (271), 13 states have internal predecessors, (271), 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) [2021-06-05 18:11:51,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:51,063 INFO L93 Difference]: Finished difference Result 31205 states and 80942 transitions. [2021-06-05 18:11:51,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 18:11:51,064 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 20.846153846153847) internal successors, (271), 13 states have internal predecessors, (271), 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 233 [2021-06-05 18:11:51,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:51,100 INFO L225 Difference]: With dead ends: 31205 [2021-06-05 18:11:51,100 INFO L226 Difference]: Without dead ends: 31205 [2021-06-05 18:11:51,101 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:11:51,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31205 states. [2021-06-05 18:11:51,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31205 to 19965. [2021-06-05 18:11:51,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19965 states, 19963 states have (on average 2.602214096077744) internal successors, (51948), 19964 states have internal predecessors, (51948), 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) [2021-06-05 18:11:51,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19965 states to 19965 states and 51948 transitions. [2021-06-05 18:11:51,465 INFO L78 Accepts]: Start accepts. Automaton has 19965 states and 51948 transitions. Word has length 233 [2021-06-05 18:11:51,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:51,465 INFO L482 AbstractCegarLoop]: Abstraction has 19965 states and 51948 transitions. [2021-06-05 18:11:51,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 20.846153846153847) internal successors, (271), 13 states have internal predecessors, (271), 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) [2021-06-05 18:11:51,466 INFO L276 IsEmpty]: Start isEmpty. Operand 19965 states and 51948 transitions. [2021-06-05 18:11:51,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-06-05 18:11:51,490 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:51,490 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:51,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:51,707 INFO L430 AbstractCegarLoop]: === Iteration 15 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:51,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:51,707 INFO L82 PathProgramCache]: Analyzing trace with hash 822404532, now seen corresponding path program 5 times [2021-06-05 18:11:51,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:51,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204944758] [2021-06-05 18:11:51,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:51,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:51,878 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 258 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 18:11:51,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:51,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204944758] [2021-06-05 18:11:51,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204944758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:51,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91702052] [2021-06-05 18:11:51,879 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 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 [2021-06-05 18:11:52,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 18:11:52,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:52,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:11:52,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:52,341 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 235 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:11:52,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91702052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:52,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:52,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-06-05 18:11:52,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476762724] [2021-06-05 18:11:52,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:11:52,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:52,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:11:52,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:11:52,343 INFO L87 Difference]: Start difference. First operand 19965 states and 51948 transitions. Second operand has 12 states, 12 states have (on average 20.833333333333332) internal successors, (250), 12 states have internal predecessors, (250), 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) [2021-06-05 18:11:52,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:52,545 INFO L93 Difference]: Finished difference Result 27170 states and 70572 transitions. [2021-06-05 18:11:52,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 18:11:52,546 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 20.833333333333332) internal successors, (250), 12 states have internal predecessors, (250), 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 234 [2021-06-05 18:11:52,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:52,580 INFO L225 Difference]: With dead ends: 27170 [2021-06-05 18:11:52,580 INFO L226 Difference]: Without dead ends: 27170 [2021-06-05 18:11:52,581 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:11:52,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27170 states. [2021-06-05 18:11:52,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27170 to 22865. [2021-06-05 18:11:52,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22865 states, 22863 states have (on average 2.6165857499015877) internal successors, (59823), 22864 states have internal predecessors, (59823), 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) [2021-06-05 18:11:52,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22865 states to 22865 states and 59823 transitions. [2021-06-05 18:11:52,961 INFO L78 Accepts]: Start accepts. Automaton has 22865 states and 59823 transitions. Word has length 234 [2021-06-05 18:11:52,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:52,961 INFO L482 AbstractCegarLoop]: Abstraction has 22865 states and 59823 transitions. [2021-06-05 18:11:52,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 20.833333333333332) internal successors, (250), 12 states have internal predecessors, (250), 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) [2021-06-05 18:11:52,962 INFO L276 IsEmpty]: Start isEmpty. Operand 22865 states and 59823 transitions. [2021-06-05 18:11:52,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-06-05 18:11:52,985 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:52,985 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:53,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 18:11:53,188 INFO L430 AbstractCegarLoop]: === Iteration 16 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:53,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:53,189 INFO L82 PathProgramCache]: Analyzing trace with hash 209544943, now seen corresponding path program 6 times [2021-06-05 18:11:53,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:53,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106754467] [2021-06-05 18:11:53,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:53,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:53,325 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 615 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:53,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:53,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106754467] [2021-06-05 18:11:53,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106754467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:53,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954324360] [2021-06-05 18:11:53,325 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 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 [2021-06-05 18:11:53,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 18:11:53,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:53,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:11:53,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:53,864 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 615 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:53,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954324360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:53,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:53,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:11:53,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703010089] [2021-06-05 18:11:53,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:11:53,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:53,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:11:53,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:11:53,866 INFO L87 Difference]: Start difference. First operand 22865 states and 59823 transitions. Second operand has 17 states, 17 states have (on average 18.294117647058822) internal successors, (311), 17 states have internal predecessors, (311), 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) [2021-06-05 18:11:54,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:54,106 INFO L93 Difference]: Finished difference Result 29242 states and 75990 transitions. [2021-06-05 18:11:54,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:11:54,106 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 18.294117647058822) internal successors, (311), 17 states have internal predecessors, (311), 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 264 [2021-06-05 18:11:54,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:54,140 INFO L225 Difference]: With dead ends: 29242 [2021-06-05 18:11:54,141 INFO L226 Difference]: Without dead ends: 29242 [2021-06-05 18:11:54,141 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 167.3ms TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:11:54,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29242 states. [2021-06-05 18:11:54,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29242 to 25100. [2021-06-05 18:11:54,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25100 states, 25098 states have (on average 2.612837676308869) internal successors, (65577), 25099 states have internal predecessors, (65577), 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) [2021-06-05 18:11:54,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25100 states to 25100 states and 65577 transitions. [2021-06-05 18:11:54,541 INFO L78 Accepts]: Start accepts. Automaton has 25100 states and 65577 transitions. Word has length 264 [2021-06-05 18:11:54,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:54,542 INFO L482 AbstractCegarLoop]: Abstraction has 25100 states and 65577 transitions. [2021-06-05 18:11:54,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 18.294117647058822) internal successors, (311), 17 states have internal predecessors, (311), 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) [2021-06-05 18:11:54,542 INFO L276 IsEmpty]: Start isEmpty. Operand 25100 states and 65577 transitions. [2021-06-05 18:11:54,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-06-05 18:11:54,564 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:54,564 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:54,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 18:11:54,765 INFO L430 AbstractCegarLoop]: === Iteration 17 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:54,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:54,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1544523377, now seen corresponding path program 2 times [2021-06-05 18:11:54,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:54,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908598745] [2021-06-05 18:11:54,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:54,861 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 57 proven. 242 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 18:11:54,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:54,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908598745] [2021-06-05 18:11:54,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908598745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:54,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75712660] [2021-06-05 18:11:54,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:54,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:11:54,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:54,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:11:54,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 57 proven. 242 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 18:11:55,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75712660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:55,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:55,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 18:11:55,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617774301] [2021-06-05 18:11:55,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:11:55,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:55,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:11:55,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:11:55,275 INFO L87 Difference]: Start difference. First operand 25100 states and 65577 transitions. Second operand has 15 states, 15 states have (on average 20.4) internal successors, (306), 15 states have internal predecessors, (306), 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) [2021-06-05 18:11:55,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:55,518 INFO L93 Difference]: Finished difference Result 38575 states and 100043 transitions. [2021-06-05 18:11:55,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 18:11:55,518 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 20.4) internal successors, (306), 15 states have internal predecessors, (306), 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 268 [2021-06-05 18:11:55,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:55,562 INFO L225 Difference]: With dead ends: 38575 [2021-06-05 18:11:55,562 INFO L226 Difference]: Without dead ends: 38575 [2021-06-05 18:11:55,563 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:11:55,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38575 states. [2021-06-05 18:11:55,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38575 to 25100. [2021-06-05 18:11:55,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25100 states, 25098 states have (on average 2.612837676308869) internal successors, (65577), 25099 states have internal predecessors, (65577), 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) [2021-06-05 18:11:55,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25100 states to 25100 states and 65577 transitions. [2021-06-05 18:11:55,969 INFO L78 Accepts]: Start accepts. Automaton has 25100 states and 65577 transitions. Word has length 268 [2021-06-05 18:11:55,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:55,970 INFO L482 AbstractCegarLoop]: Abstraction has 25100 states and 65577 transitions. [2021-06-05 18:11:55,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 20.4) internal successors, (306), 15 states have internal predecessors, (306), 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) [2021-06-05 18:11:55,970 INFO L276 IsEmpty]: Start isEmpty. Operand 25100 states and 65577 transitions. [2021-06-05 18:11:55,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-06-05 18:11:55,991 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:55,992 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:56,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 18:11:56,197 INFO L430 AbstractCegarLoop]: === Iteration 18 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:56,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:56,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1695875948, now seen corresponding path program 6 times [2021-06-05 18:11:56,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:56,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987788428] [2021-06-05 18:11:56,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:56,301 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 390 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:11:56,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:56,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987788428] [2021-06-05 18:11:56,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987788428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:56,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462357410] [2021-06-05 18:11:56,301 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 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 [2021-06-05 18:11:56,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 18:11:56,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:56,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:11:56,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:56,746 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 390 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:11:56,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462357410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:56,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:56,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 18:11:56,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603712710] [2021-06-05 18:11:56,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:11:56,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:56,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:11:56,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:11:56,747 INFO L87 Difference]: Start difference. First operand 25100 states and 65577 transitions. Second operand has 14 states, 14 states have (on average 20.357142857142858) internal successors, (285), 14 states have internal predecessors, (285), 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) [2021-06-05 18:11:56,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:56,951 INFO L93 Difference]: Finished difference Result 35570 states and 92379 transitions. [2021-06-05 18:11:56,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 18:11:56,951 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.357142857142858) internal successors, (285), 14 states have internal predecessors, (285), 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 269 [2021-06-05 18:11:56,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:56,992 INFO L225 Difference]: With dead ends: 35570 [2021-06-05 18:11:56,992 INFO L226 Difference]: Without dead ends: 35570 [2021-06-05 18:11:56,992 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 114.4ms TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:11:57,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35570 states. [2021-06-05 18:11:57,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35570 to 25100. [2021-06-05 18:11:57,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25100 states, 25098 states have (on average 2.612837676308869) internal successors, (65577), 25099 states have internal predecessors, (65577), 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) [2021-06-05 18:11:57,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25100 states to 25100 states and 65577 transitions. [2021-06-05 18:11:57,384 INFO L78 Accepts]: Start accepts. Automaton has 25100 states and 65577 transitions. Word has length 269 [2021-06-05 18:11:57,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:57,385 INFO L482 AbstractCegarLoop]: Abstraction has 25100 states and 65577 transitions. [2021-06-05 18:11:57,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 20.357142857142858) internal successors, (285), 14 states have internal predecessors, (285), 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) [2021-06-05 18:11:57,385 INFO L276 IsEmpty]: Start isEmpty. Operand 25100 states and 65577 transitions. [2021-06-05 18:11:57,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-06-05 18:11:57,407 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:57,408 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:57,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:57,609 INFO L430 AbstractCegarLoop]: === Iteration 19 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:57,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:57,609 INFO L82 PathProgramCache]: Analyzing trace with hash 999967336, now seen corresponding path program 7 times [2021-06-05 18:11:57,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:57,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341619669] [2021-06-05 18:11:57,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:57,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 413 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 18:11:57,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:57,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341619669] [2021-06-05 18:11:57,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341619669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:57,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531902806] [2021-06-05 18:11:57,723 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 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 [2021-06-05 18:11:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:57,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:11:57,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:58,162 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 390 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:11:58,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531902806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:58,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:58,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 18:11:58,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251012081] [2021-06-05 18:11:58,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:11:58,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:58,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:11:58,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:11:58,164 INFO L87 Difference]: Start difference. First operand 25100 states and 65577 transitions. Second operand has 14 states, 14 states have (on average 20.357142857142858) internal successors, (285), 14 states have internal predecessors, (285), 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) [2021-06-05 18:11:58,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:58,406 INFO L93 Difference]: Finished difference Result 34595 states and 90013 transitions. [2021-06-05 18:11:58,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 18:11:58,406 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.357142857142858) internal successors, (285), 14 states have internal predecessors, (285), 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 269 [2021-06-05 18:11:58,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:58,450 INFO L225 Difference]: With dead ends: 34595 [2021-06-05 18:11:58,450 INFO L226 Difference]: Without dead ends: 34595 [2021-06-05 18:11:58,450 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 123.1ms TimeCoverageRelationStatistics Valid=194, Invalid=456, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:11:58,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34595 states. [2021-06-05 18:11:58,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34595 to 26920. [2021-06-05 18:11:58,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26920 states, 26918 states have (on average 2.618991009733264) internal successors, (70498), 26919 states have internal predecessors, (70498), 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) [2021-06-05 18:11:58,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26920 states to 26920 states and 70498 transitions. [2021-06-05 18:11:58,909 INFO L78 Accepts]: Start accepts. Automaton has 26920 states and 70498 transitions. Word has length 269 [2021-06-05 18:11:58,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:58,909 INFO L482 AbstractCegarLoop]: Abstraction has 26920 states and 70498 transitions. [2021-06-05 18:11:58,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 20.357142857142858) internal successors, (285), 14 states have internal predecessors, (285), 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) [2021-06-05 18:11:58,909 INFO L276 IsEmpty]: Start isEmpty. Operand 26920 states and 70498 transitions. [2021-06-05 18:11:58,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-06-05 18:11:58,939 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:58,939 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:59,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:59,141 INFO L430 AbstractCegarLoop]: === Iteration 20 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:59,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:59,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1826871475, now seen corresponding path program 7 times [2021-06-05 18:11:59,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:59,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703824215] [2021-06-05 18:11:59,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:59,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:59,279 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 840 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:59,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:59,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703824215] [2021-06-05 18:11:59,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703824215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:59,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484263153] [2021-06-05 18:11:59,279 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 [2021-06-05 18:11:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:59,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:11:59,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:59,731 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 840 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:59,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484263153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:59,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:59,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:11:59,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034507847] [2021-06-05 18:11:59,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:11:59,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:59,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:11:59,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:11:59,732 INFO L87 Difference]: Start difference. First operand 26920 states and 70498 transitions. Second operand has 19 states, 19 states have (on average 18.210526315789473) internal successors, (346), 19 states have internal predecessors, (346), 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) [2021-06-05 18:12:00,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:00,037 INFO L93 Difference]: Finished difference Result 36062 states and 94002 transitions. [2021-06-05 18:12:00,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:12:00,037 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 18.210526315789473) internal successors, (346), 19 states have internal predecessors, (346), 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 299 [2021-06-05 18:12:00,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:00,079 INFO L225 Difference]: With dead ends: 36062 [2021-06-05 18:12:00,079 INFO L226 Difference]: Without dead ends: 36062 [2021-06-05 18:12:00,079 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 203.6ms TimeCoverageRelationStatistics Valid=340, Invalid=716, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:12:00,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36062 states. [2021-06-05 18:12:00,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36062 to 30235. [2021-06-05 18:12:00,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30235 states, 30233 states have (on average 2.6198524790791518) internal successors, (79206), 30234 states have internal predecessors, (79206), 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) [2021-06-05 18:12:00,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30235 states to 30235 states and 79206 transitions. [2021-06-05 18:12:00,532 INFO L78 Accepts]: Start accepts. Automaton has 30235 states and 79206 transitions. Word has length 299 [2021-06-05 18:12:00,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:00,532 INFO L482 AbstractCegarLoop]: Abstraction has 30235 states and 79206 transitions. [2021-06-05 18:12:00,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 18.210526315789473) internal successors, (346), 19 states have internal predecessors, (346), 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) [2021-06-05 18:12:00,532 INFO L276 IsEmpty]: Start isEmpty. Operand 30235 states and 79206 transitions. [2021-06-05 18:12:00,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-06-05 18:12:00,563 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:00,563 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:00,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:00,764 INFO L430 AbstractCegarLoop]: === Iteration 21 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:00,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:00,764 INFO L82 PathProgramCache]: Analyzing trace with hash -86492106, now seen corresponding path program 3 times [2021-06-05 18:12:00,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:00,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885769954] [2021-06-05 18:12:00,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:00,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:00,877 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 58 proven. 294 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 18:12:00,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:00,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885769954] [2021-06-05 18:12:00,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885769954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:00,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693582516] [2021-06-05 18:12:00,878 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 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 [2021-06-05 18:12:01,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 18:12:01,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:01,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:12:01,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:01,380 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 246 proven. 67 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-06-05 18:12:01,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693582516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:01,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:01,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2021-06-05 18:12:01,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910352663] [2021-06-05 18:12:01,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:12:01,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:01,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:12:01,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:12:01,382 INFO L87 Difference]: Start difference. First operand 30235 states and 79206 transitions. Second operand has 21 states, 21 states have (on average 24.476190476190474) internal successors, (514), 21 states have internal predecessors, (514), 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) [2021-06-05 18:12:01,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:01,965 INFO L93 Difference]: Finished difference Result 69690 states and 181990 transitions. [2021-06-05 18:12:01,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:12:01,965 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 24.476190476190474) internal successors, (514), 21 states have internal predecessors, (514), 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 302 [2021-06-05 18:12:01,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:02,046 INFO L225 Difference]: With dead ends: 69690 [2021-06-05 18:12:02,046 INFO L226 Difference]: Without dead ends: 69690 [2021-06-05 18:12:02,047 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 326 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 401.0ms TimeCoverageRelationStatistics Valid=536, Invalid=1816, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:12:02,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69690 states. [2021-06-05 18:12:02,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69690 to 38635. [2021-06-05 18:12:02,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38635 states, 38633 states have (on average 2.638625009706727) internal successors, (101938), 38634 states have internal predecessors, (101938), 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) [2021-06-05 18:12:02,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38635 states to 38635 states and 101938 transitions. [2021-06-05 18:12:02,737 INFO L78 Accepts]: Start accepts. Automaton has 38635 states and 101938 transitions. Word has length 302 [2021-06-05 18:12:02,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:02,737 INFO L482 AbstractCegarLoop]: Abstraction has 38635 states and 101938 transitions. [2021-06-05 18:12:02,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 24.476190476190474) internal successors, (514), 21 states have internal predecessors, (514), 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) [2021-06-05 18:12:02,738 INFO L276 IsEmpty]: Start isEmpty. Operand 38635 states and 101938 transitions. [2021-06-05 18:12:02,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-06-05 18:12:02,774 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:02,774 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:02,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 18:12:02,977 INFO L430 AbstractCegarLoop]: === Iteration 22 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:02,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:02,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1531817012, now seen corresponding path program 8 times [2021-06-05 18:12:02,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:02,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404656054] [2021-06-05 18:12:02,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:02,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:12:03,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:03,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404656054] [2021-06-05 18:12:03,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404656054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:03,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937867842] [2021-06-05 18:12:03,105 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 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 [2021-06-05 18:12:03,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:12:03,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:03,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:12:03,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:03,666 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:12:03,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937867842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:03,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:03,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 18:12:03,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81272155] [2021-06-05 18:12:03,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:12:03,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:03,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:12:03,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:12:03,667 INFO L87 Difference]: Start difference. First operand 38635 states and 101938 transitions. Second operand has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 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) [2021-06-05 18:12:03,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:03,972 INFO L93 Difference]: Finished difference Result 58520 states and 153912 transitions. [2021-06-05 18:12:03,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:12:03,972 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 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 304 [2021-06-05 18:12:03,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:04,044 INFO L225 Difference]: With dead ends: 58520 [2021-06-05 18:12:04,044 INFO L226 Difference]: Without dead ends: 58520 [2021-06-05 18:12:04,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 157.5ms TimeCoverageRelationStatistics Valid=238, Invalid=692, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:12:04,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58520 states. [2021-06-05 18:12:04,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58520 to 40455. [2021-06-05 18:12:04,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40455 states, 40453 states have (on average 2.6415593404691866) internal successors, (106859), 40454 states have internal predecessors, (106859), 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) [2021-06-05 18:12:04,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40455 states to 40455 states and 106859 transitions. [2021-06-05 18:12:04,713 INFO L78 Accepts]: Start accepts. Automaton has 40455 states and 106859 transitions. Word has length 304 [2021-06-05 18:12:04,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:04,713 INFO L482 AbstractCegarLoop]: Abstraction has 40455 states and 106859 transitions. [2021-06-05 18:12:04,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 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) [2021-06-05 18:12:04,714 INFO L276 IsEmpty]: Start isEmpty. Operand 40455 states and 106859 transitions. [2021-06-05 18:12:04,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-06-05 18:12:04,754 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:04,754 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:04,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 18:12:04,954 INFO L430 AbstractCegarLoop]: === Iteration 23 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:04,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:04,955 INFO L82 PathProgramCache]: Analyzing trace with hash 247513136, now seen corresponding path program 9 times [2021-06-05 18:12:04,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:04,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700264684] [2021-06-05 18:12:04,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:04,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:05,068 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:12:05,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:05,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700264684] [2021-06-05 18:12:05,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700264684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:05,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030189218] [2021-06-05 18:12:05,069 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 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 [2021-06-05 18:12:05,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 18:12:05,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:05,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:12:05,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:05,605 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:12:05,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030189218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:05,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:05,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 18:12:05,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579512736] [2021-06-05 18:12:05,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:12:05,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:05,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:12:05,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:12:05,607 INFO L87 Difference]: Start difference. First operand 40455 states and 106859 transitions. Second operand has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 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) [2021-06-05 18:12:05,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:05,916 INFO L93 Difference]: Finished difference Result 60835 states and 160146 transitions. [2021-06-05 18:12:05,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:12:05,916 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 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 304 [2021-06-05 18:12:05,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:05,995 INFO L225 Difference]: With dead ends: 60835 [2021-06-05 18:12:05,995 INFO L226 Difference]: Without dead ends: 60835 [2021-06-05 18:12:05,995 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 151.6ms TimeCoverageRelationStatistics Valid=230, Invalid=640, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:12:06,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60835 states. [2021-06-05 18:12:06,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60835 to 42275. [2021-06-05 18:12:06,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42275 states, 42273 states have (on average 2.6442410048967426) internal successors, (111780), 42274 states have internal predecessors, (111780), 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) [2021-06-05 18:12:06,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42275 states to 42275 states and 111780 transitions. [2021-06-05 18:12:06,663 INFO L78 Accepts]: Start accepts. Automaton has 42275 states and 111780 transitions. Word has length 304 [2021-06-05 18:12:06,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:06,664 INFO L482 AbstractCegarLoop]: Abstraction has 42275 states and 111780 transitions. [2021-06-05 18:12:06,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 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) [2021-06-05 18:12:06,664 INFO L276 IsEmpty]: Start isEmpty. Operand 42275 states and 111780 transitions. [2021-06-05 18:12:06,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-06-05 18:12:06,705 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:06,705 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:06,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 18:12:06,906 INFO L430 AbstractCegarLoop]: === Iteration 24 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:06,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:06,906 INFO L82 PathProgramCache]: Analyzing trace with hash -304592204, now seen corresponding path program 10 times [2021-06-05 18:12:06,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:06,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886639277] [2021-06-05 18:12:06,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:06,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:07,053 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:12:07,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:07,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886639277] [2021-06-05 18:12:07,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886639277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:07,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621575106] [2021-06-05 18:12:07,053 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 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 [2021-06-05 18:12:07,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:12:07,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:07,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:12:07,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:07,891 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:12:07,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621575106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:07,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:07,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 18:12:07,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408183235] [2021-06-05 18:12:07,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:12:07,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:07,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:12:07,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:12:07,893 INFO L87 Difference]: Start difference. First operand 42275 states and 111780 transitions. Second operand has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 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) [2021-06-05 18:12:08,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:08,234 INFO L93 Difference]: Finished difference Result 62310 states and 163598 transitions. [2021-06-05 18:12:08,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:12:08,235 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 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 304 [2021-06-05 18:12:08,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:08,313 INFO L225 Difference]: With dead ends: 62310 [2021-06-05 18:12:08,313 INFO L226 Difference]: Without dead ends: 62310 [2021-06-05 18:12:08,314 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 160.3ms TimeCoverageRelationStatistics Valid=222, Invalid=590, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:12:08,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62310 states. [2021-06-05 18:12:08,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62310 to 43355. [2021-06-05 18:12:09,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43355 states, 43353 states have (on average 2.646506585472747) internal successors, (114734), 43354 states have internal predecessors, (114734), 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) [2021-06-05 18:12:09,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43355 states to 43355 states and 114734 transitions. [2021-06-05 18:12:09,121 INFO L78 Accepts]: Start accepts. Automaton has 43355 states and 114734 transitions. Word has length 304 [2021-06-05 18:12:09,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:09,121 INFO L482 AbstractCegarLoop]: Abstraction has 43355 states and 114734 transitions. [2021-06-05 18:12:09,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 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) [2021-06-05 18:12:09,121 INFO L276 IsEmpty]: Start isEmpty. Operand 43355 states and 114734 transitions. [2021-06-05 18:12:09,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-06-05 18:12:09,168 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:09,168 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:09,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 18:12:09,381 INFO L430 AbstractCegarLoop]: === Iteration 25 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:09,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:09,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1000500816, now seen corresponding path program 11 times [2021-06-05 18:12:09,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:09,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785874445] [2021-06-05 18:12:09,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:12:09,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:09,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785874445] [2021-06-05 18:12:09,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785874445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:09,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314707107] [2021-06-05 18:12:09,506 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 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 [2021-06-05 18:12:09,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 18:12:09,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:09,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:12:09,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:10,075 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:12:10,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314707107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:10,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:10,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 18:12:10,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548978789] [2021-06-05 18:12:10,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:12:10,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:10,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:12:10,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:12:10,077 INFO L87 Difference]: Start difference. First operand 43355 states and 114734 transitions. Second operand has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 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) [2021-06-05 18:12:10,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:10,516 INFO L93 Difference]: Finished difference Result 61860 states and 162764 transitions. [2021-06-05 18:12:10,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 18:12:10,517 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 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 304 [2021-06-05 18:12:10,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:10,586 INFO L225 Difference]: With dead ends: 61860 [2021-06-05 18:12:10,587 INFO L226 Difference]: Without dead ends: 61860 [2021-06-05 18:12:10,587 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 150.6ms TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:12:10,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61860 states. [2021-06-05 18:12:11,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61860 to 46255. [2021-06-05 18:12:11,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46255 states, 46253 states have (on average 2.650833459451279) internal successors, (122609), 46254 states have internal predecessors, (122609), 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) [2021-06-05 18:12:11,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46255 states to 46255 states and 122609 transitions. [2021-06-05 18:12:11,267 INFO L78 Accepts]: Start accepts. Automaton has 46255 states and 122609 transitions. Word has length 304 [2021-06-05 18:12:11,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:11,267 INFO L482 AbstractCegarLoop]: Abstraction has 46255 states and 122609 transitions. [2021-06-05 18:12:11,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 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) [2021-06-05 18:12:11,267 INFO L276 IsEmpty]: Start isEmpty. Operand 46255 states and 122609 transitions. [2021-06-05 18:12:11,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-06-05 18:12:11,310 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:11,310 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:11,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 18:12:11,511 INFO L430 AbstractCegarLoop]: === Iteration 26 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:11,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:11,511 INFO L82 PathProgramCache]: Analyzing trace with hash 794691892, now seen corresponding path program 12 times [2021-06-05 18:12:11,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:11,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490973033] [2021-06-05 18:12:11,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:11,631 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 603 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 18:12:11,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:11,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490973033] [2021-06-05 18:12:11,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490973033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:11,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842118968] [2021-06-05 18:12:11,631 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 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 [2021-06-05 18:12:12,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 18:12:12,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:12,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:12:12,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:12,309 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:12:12,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842118968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:12,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:12,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-06-05 18:12:12,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861643246] [2021-06-05 18:12:12,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:12:12,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:12,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:12:12,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:12:12,311 INFO L87 Difference]: Start difference. First operand 46255 states and 122609 transitions. Second operand has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 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) [2021-06-05 18:12:12,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:12,637 INFO L93 Difference]: Finished difference Result 58480 states and 154067 transitions. [2021-06-05 18:12:12,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:12:12,637 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 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 304 [2021-06-05 18:12:12,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:12,706 INFO L225 Difference]: With dead ends: 58480 [2021-06-05 18:12:12,707 INFO L226 Difference]: Without dead ends: 58480 [2021-06-05 18:12:12,707 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 163.2ms TimeCoverageRelationStatistics Valid=261, Invalid=609, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:12:12,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58480 states. [2021-06-05 18:12:13,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58480 to 49155. [2021-06-05 18:12:13,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49155 states, 49153 states have (on average 2.654649767053893) internal successors, (130484), 49154 states have internal predecessors, (130484), 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) [2021-06-05 18:12:13,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49155 states to 49155 states and 130484 transitions. [2021-06-05 18:12:13,568 INFO L78 Accepts]: Start accepts. Automaton has 49155 states and 130484 transitions. Word has length 304 [2021-06-05 18:12:13,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:13,568 INFO L482 AbstractCegarLoop]: Abstraction has 49155 states and 130484 transitions. [2021-06-05 18:12:13,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 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) [2021-06-05 18:12:13,568 INFO L276 IsEmpty]: Start isEmpty. Operand 49155 states and 130484 transitions. [2021-06-05 18:12:13,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-06-05 18:12:13,789 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:13,789 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:14,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:14,006 INFO L430 AbstractCegarLoop]: === Iteration 27 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:14,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:14,007 INFO L82 PathProgramCache]: Analyzing trace with hash 826022447, now seen corresponding path program 8 times [2021-06-05 18:12:14,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:14,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291306118] [2021-06-05 18:12:14,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:14,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:12:14,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:14,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291306118] [2021-06-05 18:12:14,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291306118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:14,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371095709] [2021-06-05 18:12:14,156 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 [2021-06-05 18:12:14,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:12:14,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:14,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:12:14,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:14,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:12:14,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371095709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:14,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:14,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:12:14,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684070638] [2021-06-05 18:12:14,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:12:14,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:14,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:12:14,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:12:14,778 INFO L87 Difference]: Start difference. First operand 49155 states and 130484 transitions. Second operand has 21 states, 21 states have (on average 18.142857142857142) internal successors, (381), 21 states have internal predecessors, (381), 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) [2021-06-05 18:12:15,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:15,184 INFO L93 Difference]: Finished difference Result 57822 states and 152463 transitions. [2021-06-05 18:12:15,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:12:15,185 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 18.142857142857142) internal successors, (381), 21 states have internal predecessors, (381), 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 334 [2021-06-05 18:12:15,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:15,256 INFO L225 Difference]: With dead ends: 57822 [2021-06-05 18:12:15,256 INFO L226 Difference]: Without dead ends: 57822 [2021-06-05 18:12:15,257 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 240.5ms TimeCoverageRelationStatistics Valid=427, Invalid=905, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:12:15,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57822 states. [2021-06-05 18:12:15,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57822 to 51390. [2021-06-05 18:12:15,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51390 states, 51388 states have (on average 2.6511636958044678) internal successors, (136238), 51389 states have internal predecessors, (136238), 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) [2021-06-05 18:12:16,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51390 states to 51390 states and 136238 transitions. [2021-06-05 18:12:16,085 INFO L78 Accepts]: Start accepts. Automaton has 51390 states and 136238 transitions. Word has length 334 [2021-06-05 18:12:16,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:16,085 INFO L482 AbstractCegarLoop]: Abstraction has 51390 states and 136238 transitions. [2021-06-05 18:12:16,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 18.142857142857142) internal successors, (381), 21 states have internal predecessors, (381), 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) [2021-06-05 18:12:16,085 INFO L276 IsEmpty]: Start isEmpty. Operand 51390 states and 136238 transitions. [2021-06-05 18:12:16,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-06-05 18:12:16,135 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:16,135 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:16,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 18:12:16,337 INFO L430 AbstractCegarLoop]: === Iteration 28 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:16,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:16,340 INFO L82 PathProgramCache]: Analyzing trace with hash -87858067, now seen corresponding path program 4 times [2021-06-05 18:12:16,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:16,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548513533] [2021-06-05 18:12:16,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:16,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:16,596 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:12:16,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:16,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548513533] [2021-06-05 18:12:16,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548513533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:16,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711480551] [2021-06-05 18:12:16,597 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 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 [2021-06-05 18:12:16,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:12:16,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:16,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:12:16,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:17,229 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:12:17,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711480551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:17,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:17,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 18:12:17,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798190741] [2021-06-05 18:12:17,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:12:17,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:17,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:12:17,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:12:17,232 INFO L87 Difference]: Start difference. First operand 51390 states and 136238 transitions. Second operand has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 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) [2021-06-05 18:12:17,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:17,562 INFO L93 Difference]: Finished difference Result 76125 states and 201014 transitions. [2021-06-05 18:12:17,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:12:17,562 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 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 338 [2021-06-05 18:12:17,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:17,653 INFO L225 Difference]: With dead ends: 76125 [2021-06-05 18:12:17,653 INFO L226 Difference]: Without dead ends: 76125 [2021-06-05 18:12:17,653 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 128.9ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:12:17,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76125 states. [2021-06-05 18:12:18,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76125 to 53550. [2021-06-05 18:12:18,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53550 states, 53548 states have (on average 2.6545529244789723) internal successors, (142146), 53549 states have internal predecessors, (142146), 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) [2021-06-05 18:12:18,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53550 states to 53550 states and 142146 transitions. [2021-06-05 18:12:18,615 INFO L78 Accepts]: Start accepts. Automaton has 53550 states and 142146 transitions. Word has length 338 [2021-06-05 18:12:18,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:18,615 INFO L482 AbstractCegarLoop]: Abstraction has 53550 states and 142146 transitions. [2021-06-05 18:12:18,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 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) [2021-06-05 18:12:18,616 INFO L276 IsEmpty]: Start isEmpty. Operand 53550 states and 142146 transitions. [2021-06-05 18:12:18,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-06-05 18:12:18,680 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:18,680 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:18,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:18,881 INFO L430 AbstractCegarLoop]: === Iteration 29 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:18,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:18,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1213136945, now seen corresponding path program 5 times [2021-06-05 18:12:18,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:18,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218101112] [2021-06-05 18:12:18,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:18,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:18,989 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:12:18,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:18,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218101112] [2021-06-05 18:12:18,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218101112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:18,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968526109] [2021-06-05 18:12:18,989 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 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 [2021-06-05 18:12:19,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 18:12:19,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:19,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:12:19,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:19,510 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:12:19,790 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:12:19,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968526109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:19,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:19,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 18:12:19,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489884722] [2021-06-05 18:12:19,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:12:19,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:19,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:12:19,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:12:19,791 INFO L87 Difference]: Start difference. First operand 53550 states and 142146 transitions. Second operand has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 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) [2021-06-05 18:12:20,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:20,132 INFO L93 Difference]: Finished difference Result 74195 states and 195180 transitions. [2021-06-05 18:12:20,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:12:20,133 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 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 338 [2021-06-05 18:12:20,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:20,333 INFO L225 Difference]: With dead ends: 74195 [2021-06-05 18:12:20,333 INFO L226 Difference]: Without dead ends: 74195 [2021-06-05 18:12:20,333 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 134.0ms TimeCoverageRelationStatistics Valid=176, Invalid=526, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:12:20,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74195 states. [2021-06-05 18:12:21,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74195 to 54890. [2021-06-05 18:12:21,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54890 states, 54888 states have (on average 2.655644220959044) internal successors, (145763), 54889 states have internal predecessors, (145763), 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) [2021-06-05 18:12:21,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54890 states to 54890 states and 145763 transitions. [2021-06-05 18:12:21,163 INFO L78 Accepts]: Start accepts. Automaton has 54890 states and 145763 transitions. Word has length 338 [2021-06-05 18:12:21,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:21,163 INFO L482 AbstractCegarLoop]: Abstraction has 54890 states and 145763 transitions. [2021-06-05 18:12:21,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 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) [2021-06-05 18:12:21,163 INFO L276 IsEmpty]: Start isEmpty. Operand 54890 states and 145763 transitions. [2021-06-05 18:12:21,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-06-05 18:12:21,229 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:21,229 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:21,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 18:12:21,429 INFO L430 AbstractCegarLoop]: === Iteration 30 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:21,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:21,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1063720971, now seen corresponding path program 6 times [2021-06-05 18:12:21,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:21,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013389609] [2021-06-05 18:12:21,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:21,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:21,552 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 599 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-06-05 18:12:21,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:21,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013389609] [2021-06-05 18:12:21,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013389609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:21,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588672051] [2021-06-05 18:12:21,553 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 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 [2021-06-05 18:12:22,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 18:12:22,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:22,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:12:22,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:22,431 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:12:22,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588672051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:22,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:22,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-06-05 18:12:22,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023768015] [2021-06-05 18:12:22,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:12:22,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:22,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:12:22,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:12:22,433 INFO L87 Difference]: Start difference. First operand 54890 states and 145763 transitions. Second operand has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 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) [2021-06-05 18:12:22,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:22,916 INFO L93 Difference]: Finished difference Result 79850 states and 210905 transitions. [2021-06-05 18:12:22,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:12:22,916 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 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 338 [2021-06-05 18:12:22,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:23,004 INFO L225 Difference]: With dead ends: 79850 [2021-06-05 18:12:23,004 INFO L226 Difference]: Without dead ends: 79850 [2021-06-05 18:12:23,005 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 161.4ms TimeCoverageRelationStatistics Valid=223, Invalid=647, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:12:23,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79850 states. [2021-06-05 18:12:23,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79850 to 54890. [2021-06-05 18:12:23,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54890 states, 54888 states have (on average 2.655644220959044) internal successors, (145763), 54889 states have internal predecessors, (145763), 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) [2021-06-05 18:12:23,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54890 states to 54890 states and 145763 transitions. [2021-06-05 18:12:23,956 INFO L78 Accepts]: Start accepts. Automaton has 54890 states and 145763 transitions. Word has length 338 [2021-06-05 18:12:23,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:23,957 INFO L482 AbstractCegarLoop]: Abstraction has 54890 states and 145763 transitions. [2021-06-05 18:12:23,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 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) [2021-06-05 18:12:23,957 INFO L276 IsEmpty]: Start isEmpty. Operand 54890 states and 145763 transitions. [2021-06-05 18:12:24,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-06-05 18:12:24,173 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:24,173 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:24,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:24,389 INFO L430 AbstractCegarLoop]: === Iteration 31 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:24,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:24,390 INFO L82 PathProgramCache]: Analyzing trace with hash 2105967447, now seen corresponding path program 7 times [2021-06-05 18:12:24,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:24,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46919065] [2021-06-05 18:12:24,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:24,507 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 599 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-06-05 18:12:24,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:24,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46919065] [2021-06-05 18:12:24,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46919065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:24,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789051107] [2021-06-05 18:12:24,507 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:24,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:24,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:12:24,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:12:24,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789051107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:24,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:24,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-06-05 18:12:24,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581979170] [2021-06-05 18:12:24,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:12:24,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:24,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:12:24,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:12:24,998 INFO L87 Difference]: Start difference. First operand 54890 states and 145763 transitions. Second operand has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 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) [2021-06-05 18:12:25,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:25,427 INFO L93 Difference]: Finished difference Result 76925 states and 202929 transitions. [2021-06-05 18:12:25,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:12:25,427 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 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 338 [2021-06-05 18:12:25,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:25,524 INFO L225 Difference]: With dead ends: 76925 [2021-06-05 18:12:25,524 INFO L226 Difference]: Without dead ends: 76925 [2021-06-05 18:12:25,524 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 159.0ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:12:25,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76925 states. [2021-06-05 18:12:26,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76925 to 56710. [2021-06-05 18:12:26,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56710 states, 56708 states have (on average 2.6571912252239542) internal successors, (150684), 56709 states have internal predecessors, (150684), 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) [2021-06-05 18:12:26,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56710 states to 56710 states and 150684 transitions. [2021-06-05 18:12:26,687 INFO L78 Accepts]: Start accepts. Automaton has 56710 states and 150684 transitions. Word has length 338 [2021-06-05 18:12:26,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:26,687 INFO L482 AbstractCegarLoop]: Abstraction has 56710 states and 150684 transitions. [2021-06-05 18:12:26,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 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) [2021-06-05 18:12:26,687 INFO L276 IsEmpty]: Start isEmpty. Operand 56710 states and 150684 transitions. [2021-06-05 18:12:26,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-06-05 18:12:26,751 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:26,752 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:26,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 18:12:26,961 INFO L430 AbstractCegarLoop]: === Iteration 32 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:26,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:26,961 INFO L82 PathProgramCache]: Analyzing trace with hash 953064629, now seen corresponding path program 8 times [2021-06-05 18:12:26,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:26,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297619636] [2021-06-05 18:12:26,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:27,076 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 599 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-06-05 18:12:27,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:27,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297619636] [2021-06-05 18:12:27,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297619636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:27,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209249639] [2021-06-05 18:12:27,076 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:27,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:12:27,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:27,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:12:27,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:27,547 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:12:27,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209249639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:27,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:27,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-06-05 18:12:27,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999157408] [2021-06-05 18:12:27,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:12:27,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:27,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:12:27,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:12:27,548 INFO L87 Difference]: Start difference. First operand 56710 states and 150684 transitions. Second operand has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 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) [2021-06-05 18:12:27,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:27,960 INFO L93 Difference]: Finished difference Result 72430 states and 190479 transitions. [2021-06-05 18:12:27,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:12:27,961 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 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 338 [2021-06-05 18:12:27,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:28,048 INFO L225 Difference]: With dead ends: 72430 [2021-06-05 18:12:28,048 INFO L226 Difference]: Without dead ends: 72430 [2021-06-05 18:12:28,048 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 237.3ms TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:12:28,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72430 states. [2021-06-05 18:12:28,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72430 to 56970. [2021-06-05 18:12:28,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56970 states, 56968 states have (on average 2.6567020081449235) internal successors, (151347), 56969 states have internal predecessors, (151347), 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) [2021-06-05 18:12:29,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56970 states to 56970 states and 151347 transitions. [2021-06-05 18:12:29,062 INFO L78 Accepts]: Start accepts. Automaton has 56970 states and 151347 transitions. Word has length 338 [2021-06-05 18:12:29,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:29,063 INFO L482 AbstractCegarLoop]: Abstraction has 56970 states and 151347 transitions. [2021-06-05 18:12:29,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 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) [2021-06-05 18:12:29,063 INFO L276 IsEmpty]: Start isEmpty. Operand 56970 states and 151347 transitions. [2021-06-05 18:12:29,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-06-05 18:12:29,306 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:29,313 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:29,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:29,529 INFO L430 AbstractCegarLoop]: === Iteration 33 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:29,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:29,529 INFO L82 PathProgramCache]: Analyzing trace with hash -32186388, now seen corresponding path program 13 times [2021-06-05 18:12:29,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:29,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468840777] [2021-06-05 18:12:29,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:29,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:29,651 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:12:29,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:29,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468840777] [2021-06-05 18:12:29,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468840777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:29,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774621317] [2021-06-05 18:12:29,651 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:29,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:12:29,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:30,116 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:12:30,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774621317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:30,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:30,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:12:30,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218354616] [2021-06-05 18:12:30,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:12:30,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:30,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:12:30,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:12:30,117 INFO L87 Difference]: Start difference. First operand 56970 states and 151347 transitions. Second operand has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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) [2021-06-05 18:12:30,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:30,629 INFO L93 Difference]: Finished difference Result 80730 states and 213255 transitions. [2021-06-05 18:12:30,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:12:30,630 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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 339 [2021-06-05 18:12:30,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:30,707 INFO L225 Difference]: With dead ends: 80730 [2021-06-05 18:12:30,707 INFO L226 Difference]: Without dead ends: 80730 [2021-06-05 18:12:30,708 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 194.6ms TimeCoverageRelationStatistics Valid=319, Invalid=941, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:12:30,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80730 states. [2021-06-05 18:12:31,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80730 to 56970. [2021-06-05 18:12:31,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56970 states, 56968 states have (on average 2.6567020081449235) internal successors, (151347), 56969 states have internal predecessors, (151347), 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) [2021-06-05 18:12:31,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56970 states to 56970 states and 151347 transitions. [2021-06-05 18:12:31,571 INFO L78 Accepts]: Start accepts. Automaton has 56970 states and 151347 transitions. Word has length 339 [2021-06-05 18:12:31,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:31,571 INFO L482 AbstractCegarLoop]: Abstraction has 56970 states and 151347 transitions. [2021-06-05 18:12:31,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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) [2021-06-05 18:12:31,571 INFO L276 IsEmpty]: Start isEmpty. Operand 56970 states and 151347 transitions. [2021-06-05 18:12:31,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-06-05 18:12:31,633 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:31,633 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:31,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 18:12:31,834 INFO L430 AbstractCegarLoop]: === Iteration 34 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:31,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:31,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1316490264, now seen corresponding path program 14 times [2021-06-05 18:12:31,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:31,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278225028] [2021-06-05 18:12:31,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:12:31,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:31,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278225028] [2021-06-05 18:12:31,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278225028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:31,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112136788] [2021-06-05 18:12:31,968 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:32,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:12:32,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:32,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:12:32,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:32,606 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:12:32,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112136788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:32,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:32,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:12:32,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041572574] [2021-06-05 18:12:32,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:12:32,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:32,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:12:32,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:12:32,607 INFO L87 Difference]: Start difference. First operand 56970 states and 151347 transitions. Second operand has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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) [2021-06-05 18:12:33,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:33,020 INFO L93 Difference]: Finished difference Result 83430 states and 220365 transitions. [2021-06-05 18:12:33,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:12:33,020 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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 339 [2021-06-05 18:12:33,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:33,122 INFO L225 Difference]: With dead ends: 83430 [2021-06-05 18:12:33,122 INFO L226 Difference]: Without dead ends: 83430 [2021-06-05 18:12:33,122 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 195.1ms TimeCoverageRelationStatistics Valid=310, Invalid=880, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:12:33,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83430 states. [2021-06-05 18:12:34,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83430 to 58790. [2021-06-05 18:12:34,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58790 states, 58788 states have (on average 2.6581615295638565) internal successors, (156268), 58789 states have internal predecessors, (156268), 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) [2021-06-05 18:12:34,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58790 states to 58790 states and 156268 transitions. [2021-06-05 18:12:34,320 INFO L78 Accepts]: Start accepts. Automaton has 58790 states and 156268 transitions. Word has length 339 [2021-06-05 18:12:34,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:34,321 INFO L482 AbstractCegarLoop]: Abstraction has 58790 states and 156268 transitions. [2021-06-05 18:12:34,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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) [2021-06-05 18:12:34,321 INFO L276 IsEmpty]: Start isEmpty. Operand 58790 states and 156268 transitions. [2021-06-05 18:12:34,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-06-05 18:12:34,389 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:34,389 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:34,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:34,597 INFO L430 AbstractCegarLoop]: === Iteration 35 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:34,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:34,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1868595604, now seen corresponding path program 15 times [2021-06-05 18:12:34,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:34,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059119252] [2021-06-05 18:12:34,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:34,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:12:34,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:34,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059119252] [2021-06-05 18:12:34,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059119252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:34,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719162585] [2021-06-05 18:12:34,723 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:34,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 18:12:34,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:34,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:12:34,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:35,363 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:12:35,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719162585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:35,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:35,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:12:35,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731502623] [2021-06-05 18:12:35,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:12:35,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:35,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:12:35,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:12:35,365 INFO L87 Difference]: Start difference. First operand 58790 states and 156268 transitions. Second operand has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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) [2021-06-05 18:12:35,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:35,919 INFO L93 Difference]: Finished difference Result 86710 states and 229239 transitions. [2021-06-05 18:12:35,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:12:35,919 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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 339 [2021-06-05 18:12:35,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:36,020 INFO L225 Difference]: With dead ends: 86710 [2021-06-05 18:12:36,020 INFO L226 Difference]: Without dead ends: 86710 [2021-06-05 18:12:36,020 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 196.2ms TimeCoverageRelationStatistics Valid=301, Invalid=821, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:12:36,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86710 states. [2021-06-05 18:12:36,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86710 to 60610. [2021-06-05 18:12:37,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60610 states, 60608 states have (on average 2.659533394931362) internal successors, (161189), 60609 states have internal predecessors, (161189), 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) [2021-06-05 18:12:37,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60610 states to 60610 states and 161189 transitions. [2021-06-05 18:12:37,166 INFO L78 Accepts]: Start accepts. Automaton has 60610 states and 161189 transitions. Word has length 339 [2021-06-05 18:12:37,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:37,167 INFO L482 AbstractCegarLoop]: Abstraction has 60610 states and 161189 transitions. [2021-06-05 18:12:37,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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) [2021-06-05 18:12:37,167 INFO L276 IsEmpty]: Start isEmpty. Operand 60610 states and 161189 transitions. [2021-06-05 18:12:37,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-06-05 18:12:37,243 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:37,243 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:37,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 18:12:37,443 INFO L430 AbstractCegarLoop]: === Iteration 36 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:37,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:37,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1730463080, now seen corresponding path program 16 times [2021-06-05 18:12:37,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:37,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045390248] [2021-06-05 18:12:37,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:37,577 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:12:37,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:37,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045390248] [2021-06-05 18:12:37,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045390248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:37,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123319881] [2021-06-05 18:12:37,578 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:38,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:12:38,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:38,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:12:38,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:12:38,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123319881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:38,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:38,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:12:38,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178072935] [2021-06-05 18:12:38,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:12:38,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:38,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:12:38,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:12:38,496 INFO L87 Difference]: Start difference. First operand 60610 states and 161189 transitions. Second operand has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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) [2021-06-05 18:12:38,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:38,900 INFO L93 Difference]: Finished difference Result 88725 states and 234124 transitions. [2021-06-05 18:12:38,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:12:38,900 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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 339 [2021-06-05 18:12:38,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:39,012 INFO L225 Difference]: With dead ends: 88725 [2021-06-05 18:12:39,013 INFO L226 Difference]: Without dead ends: 88725 [2021-06-05 18:12:39,013 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 177.3ms TimeCoverageRelationStatistics Valid=292, Invalid=764, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:12:39,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88725 states. [2021-06-05 18:12:40,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88725 to 67490. [2021-06-05 18:12:40,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67490 states, 67488 states have (on average 2.6655553579895686) internal successors, (179893), 67489 states have internal predecessors, (179893), 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) [2021-06-05 18:12:40,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67490 states to 67490 states and 179893 transitions. [2021-06-05 18:12:40,422 INFO L78 Accepts]: Start accepts. Automaton has 67490 states and 179893 transitions. Word has length 339 [2021-06-05 18:12:40,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:40,423 INFO L482 AbstractCegarLoop]: Abstraction has 67490 states and 179893 transitions. [2021-06-05 18:12:40,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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) [2021-06-05 18:12:40,423 INFO L276 IsEmpty]: Start isEmpty. Operand 67490 states and 179893 transitions. [2021-06-05 18:12:40,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-06-05 18:12:40,494 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:40,494 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:40,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 18:12:40,695 INFO L430 AbstractCegarLoop]: === Iteration 37 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:40,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:40,695 INFO L82 PathProgramCache]: Analyzing trace with hash -769311508, now seen corresponding path program 17 times [2021-06-05 18:12:40,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:40,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269582824] [2021-06-05 18:12:40,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:40,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:40,822 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:12:40,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:40,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269582824] [2021-06-05 18:12:40,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269582824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:40,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102136983] [2021-06-05 18:12:40,822 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:41,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 18:12:41,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:41,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:12:41,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:41,379 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:12:41,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102136983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:41,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:41,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:12:41,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689055996] [2021-06-05 18:12:41,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:12:41,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:41,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:12:41,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:12:41,380 INFO L87 Difference]: Start difference. First operand 67490 states and 179893 transitions. Second operand has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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) [2021-06-05 18:12:41,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:41,946 INFO L93 Difference]: Finished difference Result 85430 states and 225749 transitions. [2021-06-05 18:12:41,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:12:41,949 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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 339 [2021-06-05 18:12:41,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:42,052 INFO L225 Difference]: With dead ends: 85430 [2021-06-05 18:12:42,053 INFO L226 Difference]: Without dead ends: 85430 [2021-06-05 18:12:42,053 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 174.0ms TimeCoverageRelationStatistics Valid=283, Invalid=709, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:12:42,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85430 states. [2021-06-05 18:12:43,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85430 to 71470. [2021-06-05 18:12:43,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71470 states, 71468 states have (on average 2.6686349135277325) internal successors, (190722), 71469 states have internal predecessors, (190722), 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) [2021-06-05 18:12:43,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71470 states to 71470 states and 190722 transitions. [2021-06-05 18:12:43,255 INFO L78 Accepts]: Start accepts. Automaton has 71470 states and 190722 transitions. Word has length 339 [2021-06-05 18:12:43,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:43,255 INFO L482 AbstractCegarLoop]: Abstraction has 71470 states and 190722 transitions. [2021-06-05 18:12:43,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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) [2021-06-05 18:12:43,255 INFO L276 IsEmpty]: Start isEmpty. Operand 71470 states and 190722 transitions. [2021-06-05 18:12:43,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-06-05 18:12:43,334 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:43,334 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:43,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 18:12:43,535 INFO L430 AbstractCegarLoop]: === Iteration 38 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:43,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:43,535 INFO L82 PathProgramCache]: Analyzing trace with hash -621644056, now seen corresponding path program 18 times [2021-06-05 18:12:43,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:43,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858358543] [2021-06-05 18:12:43,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:43,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:43,684 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 828 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 18:12:43,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:43,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858358543] [2021-06-05 18:12:43,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858358543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:43,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581666632] [2021-06-05 18:12:43,685 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:44,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 18:12:44,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:44,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:12:44,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:12:44,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581666632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:44,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:44,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-06-05 18:12:44,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595388581] [2021-06-05 18:12:44,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:12:44,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:44,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:12:44,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:12:44,345 INFO L87 Difference]: Start difference. First operand 71470 states and 190722 transitions. Second operand has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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) [2021-06-05 18:12:44,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:44,935 INFO L93 Difference]: Finished difference Result 82005 states and 217163 transitions. [2021-06-05 18:12:44,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:12:44,936 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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 339 [2021-06-05 18:12:44,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:45,040 INFO L225 Difference]: With dead ends: 82005 [2021-06-05 18:12:45,041 INFO L226 Difference]: Without dead ends: 82005 [2021-06-05 18:12:45,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 199.7ms TimeCoverageRelationStatistics Valid=338, Invalid=784, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:12:45,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82005 states. [2021-06-05 18:12:46,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82005 to 70390. [2021-06-05 18:12:46,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70390 states, 70388 states have (on average 2.6676137978064443) internal successors, (187768), 70389 states have internal predecessors, (187768), 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) [2021-06-05 18:12:46,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70390 states to 70390 states and 187768 transitions. [2021-06-05 18:12:46,218 INFO L78 Accepts]: Start accepts. Automaton has 70390 states and 187768 transitions. Word has length 339 [2021-06-05 18:12:46,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:46,219 INFO L482 AbstractCegarLoop]: Abstraction has 70390 states and 187768 transitions. [2021-06-05 18:12:46,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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) [2021-06-05 18:12:46,219 INFO L276 IsEmpty]: Start isEmpty. Operand 70390 states and 187768 transitions. [2021-06-05 18:12:46,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2021-06-05 18:12:46,302 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:46,302 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:46,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 18:12:46,503 INFO L430 AbstractCegarLoop]: === Iteration 39 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:46,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:46,503 INFO L82 PathProgramCache]: Analyzing trace with hash 165063693, now seen corresponding path program 9 times [2021-06-05 18:12:46,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:46,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489084132] [2021-06-05 18:12:46,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:46,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:12:46,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:46,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489084132] [2021-06-05 18:12:46,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489084132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:46,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215333582] [2021-06-05 18:12:46,689 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:47,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:12:47,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:47,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:47,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:47,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:12:47,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215333582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:47,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:47,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:12:47,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030727412] [2021-06-05 18:12:47,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:12:47,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:47,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:12:47,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:12:47,664 INFO L87 Difference]: Start difference. First operand 70390 states and 187768 transitions. Second operand has 23 states, 23 states have (on average 18.08695652173913) internal successors, (416), 23 states have internal predecessors, (416), 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) [2021-06-05 18:12:48,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:48,168 INFO L93 Difference]: Finished difference Result 80742 states and 214130 transitions. [2021-06-05 18:12:48,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:12:48,169 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 18.08695652173913) internal successors, (416), 23 states have internal predecessors, (416), 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 369 [2021-06-05 18:12:48,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:48,277 INFO L225 Difference]: With dead ends: 80742 [2021-06-05 18:12:48,278 INFO L226 Difference]: Without dead ends: 80742 [2021-06-05 18:12:48,278 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 295.4ms TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:12:48,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80742 states. [2021-06-05 18:12:49,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80742 to 73705. [2021-06-05 18:12:49,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73705 states, 73703 states have (on average 2.6657802260423593) internal successors, (196476), 73704 states have internal predecessors, (196476), 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) [2021-06-05 18:12:49,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73705 states to 73705 states and 196476 transitions. [2021-06-05 18:12:49,748 INFO L78 Accepts]: Start accepts. Automaton has 73705 states and 196476 transitions. Word has length 369 [2021-06-05 18:12:49,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:49,748 INFO L482 AbstractCegarLoop]: Abstraction has 73705 states and 196476 transitions. [2021-06-05 18:12:49,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 18.08695652173913) internal successors, (416), 23 states have internal predecessors, (416), 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) [2021-06-05 18:12:49,748 INFO L276 IsEmpty]: Start isEmpty. Operand 73705 states and 196476 transitions. [2021-06-05 18:12:49,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-06-05 18:12:49,829 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:49,829 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:50,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 18:12:50,030 INFO L430 AbstractCegarLoop]: === Iteration 40 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:50,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:50,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1927766189, now seen corresponding path program 9 times [2021-06-05 18:12:50,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:50,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302715083] [2021-06-05 18:12:50,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:50,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:50,151 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:12:50,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:50,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302715083] [2021-06-05 18:12:50,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302715083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:50,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061610008] [2021-06-05 18:12:50,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:50,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 18:12:50,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:50,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:50,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:50,858 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:12:50,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061610008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:50,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:50,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:12:50,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044043149] [2021-06-05 18:12:50,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:12:50,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:50,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:12:50,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:12:50,859 INFO L87 Difference]: Start difference. First operand 73705 states and 196476 transitions. Second operand has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-06-05 18:12:51,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:51,254 INFO L93 Difference]: Finished difference Result 96845 states and 256215 transitions. [2021-06-05 18:12:51,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:12:51,254 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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 373 [2021-06-05 18:12:51,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:51,367 INFO L225 Difference]: With dead ends: 96845 [2021-06-05 18:12:51,367 INFO L226 Difference]: Without dead ends: 96845 [2021-06-05 18:12:51,367 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 171.4ms TimeCoverageRelationStatistics Valid=255, Invalid=801, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:12:51,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96845 states. [2021-06-05 18:12:52,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96845 to 71885. [2021-06-05 18:12:52,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71885 states, 71883 states have (on average 2.664816437822573) internal successors, (191555), 71884 states have internal predecessors, (191555), 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) [2021-06-05 18:12:52,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71885 states to 71885 states and 191555 transitions. [2021-06-05 18:12:52,775 INFO L78 Accepts]: Start accepts. Automaton has 71885 states and 191555 transitions. Word has length 373 [2021-06-05 18:12:52,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:52,776 INFO L482 AbstractCegarLoop]: Abstraction has 71885 states and 191555 transitions. [2021-06-05 18:12:52,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-06-05 18:12:52,776 INFO L276 IsEmpty]: Start isEmpty. Operand 71885 states and 191555 transitions. [2021-06-05 18:12:52,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-06-05 18:12:52,861 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:52,861 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:53,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 18:12:53,062 INFO L430 AbstractCegarLoop]: === Iteration 41 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:53,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:53,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1170713125, now seen corresponding path program 10 times [2021-06-05 18:12:53,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:53,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445354122] [2021-06-05 18:12:53,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:53,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:53,196 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:12:53,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:53,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445354122] [2021-06-05 18:12:53,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445354122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:53,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130239246] [2021-06-05 18:12:53,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:53,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:12:53,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:53,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:53,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:53,796 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:12:53,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130239246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:53,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:53,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:12:53,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76944241] [2021-06-05 18:12:53,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:12:53,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:53,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:12:53,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:12:53,797 INFO L87 Difference]: Start difference. First operand 71885 states and 191555 transitions. Second operand has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-06-05 18:12:54,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:54,461 INFO L93 Difference]: Finished difference Result 111885 states and 296684 transitions. [2021-06-05 18:12:54,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:12:54,462 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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 373 [2021-06-05 18:12:54,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:54,614 INFO L225 Difference]: With dead ends: 111885 [2021-06-05 18:12:54,615 INFO L226 Difference]: Without dead ends: 111885 [2021-06-05 18:12:54,615 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 176.3ms TimeCoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:12:54,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111885 states. [2021-06-05 18:12:55,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111885 to 72965. [2021-06-05 18:12:55,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72965 states, 72963 states have (on average 2.665858037635514) internal successors, (194509), 72964 states have internal predecessors, (194509), 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) [2021-06-05 18:12:56,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72965 states to 72965 states and 194509 transitions. [2021-06-05 18:12:56,096 INFO L78 Accepts]: Start accepts. Automaton has 72965 states and 194509 transitions. Word has length 373 [2021-06-05 18:12:56,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:56,096 INFO L482 AbstractCegarLoop]: Abstraction has 72965 states and 194509 transitions. [2021-06-05 18:12:56,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-06-05 18:12:56,096 INFO L276 IsEmpty]: Start isEmpty. Operand 72965 states and 194509 transitions. [2021-06-05 18:12:56,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-06-05 18:12:56,181 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:56,181 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:56,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 18:12:56,382 INFO L430 AbstractCegarLoop]: === Iteration 42 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:56,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:56,382 INFO L82 PathProgramCache]: Analyzing trace with hash 45434247, now seen corresponding path program 11 times [2021-06-05 18:12:56,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:56,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031322121] [2021-06-05 18:12:56,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:56,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:56,792 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:12:56,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:56,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031322121] [2021-06-05 18:12:56,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031322121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:56,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468342558] [2021-06-05 18:12:56,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:57,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 18:12:57,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:57,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:57,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:57,470 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:12:57,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468342558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:57,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:57,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:12:57,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386648373] [2021-06-05 18:12:57,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:12:57,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:57,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:12:57,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:12:57,472 INFO L87 Difference]: Start difference. First operand 72965 states and 194509 transitions. Second operand has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-06-05 18:12:57,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:57,917 INFO L93 Difference]: Finished difference Result 99130 states and 261670 transitions. [2021-06-05 18:12:57,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:12:57,918 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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 373 [2021-06-05 18:12:57,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:58,047 INFO L225 Difference]: With dead ends: 99130 [2021-06-05 18:12:58,047 INFO L226 Difference]: Without dead ends: 99130 [2021-06-05 18:12:58,048 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 175.3ms TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:12:58,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99130 states. [2021-06-05 18:12:59,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99130 to 76125. [2021-06-05 18:12:59,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76125 states, 76123 states have (on average 2.6673541505195537) internal successors, (203047), 76124 states have internal predecessors, (203047), 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) [2021-06-05 18:12:59,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76125 states to 76125 states and 203047 transitions. [2021-06-05 18:12:59,748 INFO L78 Accepts]: Start accepts. Automaton has 76125 states and 203047 transitions. Word has length 373 [2021-06-05 18:12:59,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:59,748 INFO L482 AbstractCegarLoop]: Abstraction has 76125 states and 203047 transitions. [2021-06-05 18:12:59,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-06-05 18:12:59,748 INFO L276 IsEmpty]: Start isEmpty. Operand 76125 states and 203047 transitions. [2021-06-05 18:12:59,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-06-05 18:12:59,836 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:59,837 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:13:00,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:00,037 INFO L430 AbstractCegarLoop]: === Iteration 43 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:00,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:00,038 INFO L82 PathProgramCache]: Analyzing trace with hash 194850221, now seen corresponding path program 12 times [2021-06-05 18:13:00,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:00,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460600329] [2021-06-05 18:13:00,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:00,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:00,153 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:13:00,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:00,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460600329] [2021-06-05 18:13:00,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460600329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:00,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765329453] [2021-06-05 18:13:00,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:00,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 18:13:00,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:00,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:13:00,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:00,838 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:13:00,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765329453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:00,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:00,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:13:00,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361053759] [2021-06-05 18:13:00,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:13:00,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:00,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:13:00,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:13:00,839 INFO L87 Difference]: Start difference. First operand 76125 states and 203047 transitions. Second operand has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-06-05 18:13:01,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:01,316 INFO L93 Difference]: Finished difference Result 115565 states and 306636 transitions. [2021-06-05 18:13:01,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:13:01,316 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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 373 [2021-06-05 18:13:01,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:01,689 INFO L225 Difference]: With dead ends: 115565 [2021-06-05 18:13:01,689 INFO L226 Difference]: Without dead ends: 115565 [2021-06-05 18:13:01,689 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 161.5ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:13:01,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115565 states. [2021-06-05 18:13:02,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115565 to 77205. [2021-06-05 18:13:02,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77205 states, 77203 states have (on average 2.66830304521845) internal successors, (206001), 77204 states have internal predecessors, (206001), 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) [2021-06-05 18:13:03,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77205 states to 77205 states and 206001 transitions. [2021-06-05 18:13:03,043 INFO L78 Accepts]: Start accepts. Automaton has 77205 states and 206001 transitions. Word has length 373 [2021-06-05 18:13:03,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:03,044 INFO L482 AbstractCegarLoop]: Abstraction has 77205 states and 206001 transitions. [2021-06-05 18:13:03,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-06-05 18:13:03,044 INFO L276 IsEmpty]: Start isEmpty. Operand 77205 states and 206001 transitions. [2021-06-05 18:13:03,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-06-05 18:13:03,134 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:03,135 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:13:03,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:03,335 INFO L430 AbstractCegarLoop]: === Iteration 44 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:03,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:03,336 INFO L82 PathProgramCache]: Analyzing trace with hash -930428657, now seen corresponding path program 13 times [2021-06-05 18:13:03,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:03,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535271474] [2021-06-05 18:13:03,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:03,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:03,450 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:13:03,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:03,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535271474] [2021-06-05 18:13:03,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535271474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:03,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118359401] [2021-06-05 18:13:03,451 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:03,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:03,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:13:03,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:03,921 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:13:03,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118359401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:03,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:03,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:13:03,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076014307] [2021-06-05 18:13:03,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:13:03,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:03,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:13:03,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:13:03,923 INFO L87 Difference]: Start difference. First operand 77205 states and 206001 transitions. Second operand has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-06-05 18:13:04,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:04,613 INFO L93 Difference]: Finished difference Result 115715 states and 307239 transitions. [2021-06-05 18:13:04,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:13:04,613 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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 373 [2021-06-05 18:13:04,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:04,772 INFO L225 Difference]: With dead ends: 115715 [2021-06-05 18:13:04,772 INFO L226 Difference]: Without dead ends: 115715 [2021-06-05 18:13:04,773 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 155.0ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:13:04,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115715 states. [2021-06-05 18:13:06,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115715 to 79025. [2021-06-05 18:13:06,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79025 states, 79023 states have (on average 2.6691216481277604) internal successors, (210922), 79024 states have internal predecessors, (210922), 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) [2021-06-05 18:13:06,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79025 states to 79025 states and 210922 transitions. [2021-06-05 18:13:06,270 INFO L78 Accepts]: Start accepts. Automaton has 79025 states and 210922 transitions. Word has length 373 [2021-06-05 18:13:06,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:06,270 INFO L482 AbstractCegarLoop]: Abstraction has 79025 states and 210922 transitions. [2021-06-05 18:13:06,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-06-05 18:13:06,271 INFO L276 IsEmpty]: Start isEmpty. Operand 79025 states and 210922 transitions. [2021-06-05 18:13:06,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-06-05 18:13:06,362 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:06,362 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:13:06,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:06,562 INFO L430 AbstractCegarLoop]: === Iteration 45 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:06,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:06,563 INFO L82 PathProgramCache]: Analyzing trace with hash -2083331475, now seen corresponding path program 14 times [2021-06-05 18:13:06,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:06,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606812339] [2021-06-05 18:13:06,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:06,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:13:06,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:06,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606812339] [2021-06-05 18:13:06,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606812339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:06,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584958087] [2021-06-05 18:13:06,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:06,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:13:06,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:06,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:13:06,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:07,155 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 18:13:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:13:07,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584958087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:07,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:07,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:13:07,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133232839] [2021-06-05 18:13:07,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:13:07,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:07,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:13:07,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:13:07,502 INFO L87 Difference]: Start difference. First operand 79025 states and 210922 transitions. Second operand has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-06-05 18:13:07,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:07,940 INFO L93 Difference]: Finished difference Result 100250 states and 264700 transitions. [2021-06-05 18:13:07,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:13:07,940 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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 373 [2021-06-05 18:13:07,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:08,078 INFO L225 Difference]: With dead ends: 100250 [2021-06-05 18:13:08,078 INFO L226 Difference]: Without dead ends: 100250 [2021-06-05 18:13:08,079 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 158.2ms TimeCoverageRelationStatistics Valid=237, Invalid=693, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:13:08,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100250 states. [2021-06-05 18:13:09,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100250 to 76125. [2021-06-05 18:13:09,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76125 states, 76123 states have (on average 2.6673541505195537) internal successors, (203047), 76124 states have internal predecessors, (203047), 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) [2021-06-05 18:13:09,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76125 states to 76125 states and 203047 transitions. [2021-06-05 18:13:09,455 INFO L78 Accepts]: Start accepts. Automaton has 76125 states and 203047 transitions. Word has length 373 [2021-06-05 18:13:09,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:09,456 INFO L482 AbstractCegarLoop]: Abstraction has 76125 states and 203047 transitions. [2021-06-05 18:13:09,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-06-05 18:13:09,456 INFO L276 IsEmpty]: Start isEmpty. Operand 76125 states and 203047 transitions. [2021-06-05 18:13:09,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-06-05 18:13:09,541 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:09,542 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:13:09,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 18:13:09,742 INFO L430 AbstractCegarLoop]: === Iteration 46 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:09,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:09,742 INFO L82 PathProgramCache]: Analyzing trace with hash 689356069, now seen corresponding path program 15 times [2021-06-05 18:13:09,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:09,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261063179] [2021-06-05 18:13:09,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:10,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:10,189 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 824 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-06-05 18:13:10,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:10,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261063179] [2021-06-05 18:13:10,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261063179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:10,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631418055] [2021-06-05 18:13:10,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:10,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 18:13:10,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:10,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:13:10,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:10,939 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:13:10,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631418055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:10,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:10,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-06-05 18:13:10,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208156063] [2021-06-05 18:13:10,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:13:10,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:10,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:13:10,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:13:10,941 INFO L87 Difference]: Start difference. First operand 76125 states and 203047 transitions. Second operand has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-06-05 18:13:11,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:11,462 INFO L93 Difference]: Finished difference Result 108675 states and 288358 transitions. [2021-06-05 18:13:11,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:13:11,463 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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 373 [2021-06-05 18:13:11,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:11,603 INFO L225 Difference]: With dead ends: 108675 [2021-06-05 18:13:11,603 INFO L226 Difference]: Without dead ends: 108675 [2021-06-05 18:13:11,603 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 233.7ms TimeCoverageRelationStatistics Valid=302, Invalid=888, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:13:11,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108675 states. [2021-06-05 18:13:13,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108675 to 76125. [2021-06-05 18:13:13,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76125 states, 76123 states have (on average 2.6673541505195537) internal successors, (203047), 76124 states have internal predecessors, (203047), 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) [2021-06-05 18:13:13,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76125 states to 76125 states and 203047 transitions. [2021-06-05 18:13:13,208 INFO L78 Accepts]: Start accepts. Automaton has 76125 states and 203047 transitions. Word has length 373 [2021-06-05 18:13:13,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:13,208 INFO L482 AbstractCegarLoop]: Abstraction has 76125 states and 203047 transitions. [2021-06-05 18:13:13,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-06-05 18:13:13,208 INFO L276 IsEmpty]: Start isEmpty. Operand 76125 states and 203047 transitions. [2021-06-05 18:13:13,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-06-05 18:13:13,292 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:13,293 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:13:13,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:13,493 INFO L430 AbstractCegarLoop]: === Iteration 47 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:13,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:13,493 INFO L82 PathProgramCache]: Analyzing trace with hash -435922809, now seen corresponding path program 16 times [2021-06-05 18:13:13,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:13,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762879532] [2021-06-05 18:13:13,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:13,624 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 824 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-06-05 18:13:13,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:13,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762879532] [2021-06-05 18:13:13,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762879532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:13,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281250301] [2021-06-05 18:13:13,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:13,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:13:13,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:13,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:13:13,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:13:14,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281250301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:14,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:14,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-06-05 18:13:14,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678321438] [2021-06-05 18:13:14,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:13:14,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:14,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:13:14,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:13:14,254 INFO L87 Difference]: Start difference. First operand 76125 states and 203047 transitions. Second operand has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-06-05 18:13:14,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:14,763 INFO L93 Difference]: Finished difference Result 110765 states and 293455 transitions. [2021-06-05 18:13:14,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:13:14,763 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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 373 [2021-06-05 18:13:14,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:15,188 INFO L225 Difference]: With dead ends: 110765 [2021-06-05 18:13:15,188 INFO L226 Difference]: Without dead ends: 110765 [2021-06-05 18:13:15,189 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 180.8ms TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:13:15,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110765 states. [2021-06-05 18:13:16,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110765 to 75045. [2021-06-05 18:13:16,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75045 states, 75043 states have (on average 2.6663779433125008) internal successors, (200093), 75044 states have internal predecessors, (200093), 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) [2021-06-05 18:13:16,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75045 states to 75045 states and 200093 transitions. [2021-06-05 18:13:16,558 INFO L78 Accepts]: Start accepts. Automaton has 75045 states and 200093 transitions. Word has length 373 [2021-06-05 18:13:16,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:16,559 INFO L482 AbstractCegarLoop]: Abstraction has 75045 states and 200093 transitions. [2021-06-05 18:13:16,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-06-05 18:13:16,559 INFO L276 IsEmpty]: Start isEmpty. Operand 75045 states and 200093 transitions. [2021-06-05 18:13:16,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-06-05 18:13:16,654 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:16,654 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:13:16,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:16,854 INFO L430 AbstractCegarLoop]: === Iteration 48 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:16,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:16,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1588825627, now seen corresponding path program 17 times [2021-06-05 18:13:16,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:16,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298889681] [2021-06-05 18:13:16,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:16,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:16,991 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 824 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-06-05 18:13:16,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:16,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298889681] [2021-06-05 18:13:16,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298889681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:16,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635998914] [2021-06-05 18:13:16,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:17,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 18:13:17,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:17,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:13:17,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:17,641 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:13:17,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635998914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:17,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:17,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-06-05 18:13:17,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814779110] [2021-06-05 18:13:17,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:13:17,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:17,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:13:17,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:13:17,643 INFO L87 Difference]: Start difference. First operand 75045 states and 200093 transitions. Second operand has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-06-05 18:13:18,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:18,356 INFO L93 Difference]: Finished difference Result 108165 states and 286375 transitions. [2021-06-05 18:13:18,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:13:18,356 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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 373 [2021-06-05 18:13:18,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:18,510 INFO L225 Difference]: With dead ends: 108165 [2021-06-05 18:13:18,511 INFO L226 Difference]: Without dead ends: 108165 [2021-06-05 18:13:18,511 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 177.0ms TimeCoverageRelationStatistics Valid=284, Invalid=772, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:13:18,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108165 states. [2021-06-05 18:13:19,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108165 to 78685. [2021-06-05 18:13:19,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78685 states, 78683 states have (on average 2.668111281979589) internal successors, (209935), 78684 states have internal predecessors, (209935), 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) [2021-06-05 18:13:19,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78685 states to 78685 states and 209935 transitions. [2021-06-05 18:13:19,914 INFO L78 Accepts]: Start accepts. Automaton has 78685 states and 209935 transitions. Word has length 373 [2021-06-05 18:13:19,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:19,914 INFO L482 AbstractCegarLoop]: Abstraction has 78685 states and 209935 transitions. [2021-06-05 18:13:19,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-06-05 18:13:19,914 INFO L276 IsEmpty]: Start isEmpty. Operand 78685 states and 209935 transitions. [2021-06-05 18:13:20,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-06-05 18:13:20,008 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:20,008 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:13:20,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 18:13:20,211 INFO L430 AbstractCegarLoop]: === Iteration 49 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:20,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:20,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1128502329, now seen corresponding path program 18 times [2021-06-05 18:13:20,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:20,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841448207] [2021-06-05 18:13:20,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:20,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:20,342 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 824 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-06-05 18:13:20,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:20,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841448207] [2021-06-05 18:13:20,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841448207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:20,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26148177] [2021-06-05 18:13:20,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:20,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 18:13:20,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:20,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:13:20,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:21,004 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:13:21,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26148177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:21,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:21,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-06-05 18:13:21,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269942503] [2021-06-05 18:13:21,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:13:21,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:21,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:13:21,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:13:21,006 INFO L87 Difference]: Start difference. First operand 78685 states and 209935 transitions. Second operand has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-06-05 18:13:21,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:21,664 INFO L93 Difference]: Finished difference Result 100025 states and 264232 transitions. [2021-06-05 18:13:21,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:13:21,665 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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 373 [2021-06-05 18:13:21,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:21,798 INFO L225 Difference]: With dead ends: 100025 [2021-06-05 18:13:21,798 INFO L226 Difference]: Without dead ends: 100025 [2021-06-05 18:13:21,798 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 175.0ms TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:13:21,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100025 states. [2021-06-05 18:13:23,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100025 to 82925. [2021-06-05 18:13:23,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82925 states, 82923 states have (on average 2.6702724214029883) internal successors, (221427), 82924 states have internal predecessors, (221427), 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) [2021-06-05 18:13:23,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82925 states to 82925 states and 221427 transitions. [2021-06-05 18:13:23,235 INFO L78 Accepts]: Start accepts. Automaton has 82925 states and 221427 transitions. Word has length 373 [2021-06-05 18:13:23,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:23,236 INFO L482 AbstractCegarLoop]: Abstraction has 82925 states and 221427 transitions. [2021-06-05 18:13:23,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-06-05 18:13:23,236 INFO L276 IsEmpty]: Start isEmpty. Operand 82925 states and 221427 transitions. [2021-06-05 18:13:23,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-06-05 18:13:23,332 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:23,332 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:13:23,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 18:13:23,533 INFO L430 AbstractCegarLoop]: === Iteration 50 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:23,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:23,534 INFO L82 PathProgramCache]: Analyzing trace with hash 328814900, now seen corresponding path program 19 times [2021-06-05 18:13:23,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:23,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090354871] [2021-06-05 18:13:23,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:23,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:23,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:13:23,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:23,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090354871] [2021-06-05 18:13:23,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090354871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:23,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406131292] [2021-06-05 18:13:23,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:23,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:23,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:13:23,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:24,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:13:24,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406131292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:24,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:24,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:13:24,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211095669] [2021-06-05 18:13:24,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:13:24,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:24,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:13:24,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:13:24,433 INFO L87 Difference]: Start difference. First operand 82925 states and 221427 transitions. Second operand has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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) [2021-06-05 18:13:24,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:24,963 INFO L93 Difference]: Finished difference Result 106480 states and 282217 transitions. [2021-06-05 18:13:24,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:13:24,963 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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 374 [2021-06-05 18:13:24,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:25,103 INFO L225 Difference]: With dead ends: 106480 [2021-06-05 18:13:25,104 INFO L226 Difference]: Without dead ends: 106480 [2021-06-05 18:13:25,104 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 245.1ms TimeCoverageRelationStatistics Valid=412, Invalid=1228, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:13:25,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106480 states. [2021-06-05 18:13:26,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106480 to 82925. [2021-06-05 18:13:26,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82925 states, 82923 states have (on average 2.6702724214029883) internal successors, (221427), 82924 states have internal predecessors, (221427), 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) [2021-06-05 18:13:26,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82925 states to 82925 states and 221427 transitions. [2021-06-05 18:13:26,609 INFO L78 Accepts]: Start accepts. Automaton has 82925 states and 221427 transitions. Word has length 374 [2021-06-05 18:13:26,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:26,610 INFO L482 AbstractCegarLoop]: Abstraction has 82925 states and 221427 transitions. [2021-06-05 18:13:26,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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) [2021-06-05 18:13:26,610 INFO L276 IsEmpty]: Start isEmpty. Operand 82925 states and 221427 transitions. [2021-06-05 18:13:26,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-06-05 18:13:26,706 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:26,706 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:13:26,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 18:13:26,907 INFO L430 AbstractCegarLoop]: === Iteration 51 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:26,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:26,907 INFO L82 PathProgramCache]: Analyzing trace with hash -955488976, now seen corresponding path program 20 times [2021-06-05 18:13:26,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:26,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661460311] [2021-06-05 18:13:26,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:26,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:27,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:13:27,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:27,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661460311] [2021-06-05 18:13:27,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661460311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:27,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437136612] [2021-06-05 18:13:27,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:27,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:13:27,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:27,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:13:27,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:27,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:13:27,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437136612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:27,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:27,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:13:27,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394247910] [2021-06-05 18:13:27,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:13:27,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:27,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:13:27,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:13:27,837 INFO L87 Difference]: Start difference. First operand 82925 states and 221427 transitions. Second operand has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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) [2021-06-05 18:13:28,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:28,397 INFO L93 Difference]: Finished difference Result 109145 states and 289012 transitions. [2021-06-05 18:13:28,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:13:28,402 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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 374 [2021-06-05 18:13:28,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:28,551 INFO L225 Difference]: With dead ends: 109145 [2021-06-05 18:13:28,552 INFO L226 Difference]: Without dead ends: 109145 [2021-06-05 18:13:28,552 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 555.8ms TimeCoverageRelationStatistics Valid=402, Invalid=1158, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:13:28,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109145 states. [2021-06-05 18:13:29,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109145 to 82925. [2021-06-05 18:13:29,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82925 states, 82923 states have (on average 2.6702724214029883) internal successors, (221427), 82924 states have internal predecessors, (221427), 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) [2021-06-05 18:13:30,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82925 states to 82925 states and 221427 transitions. [2021-06-05 18:13:30,417 INFO L78 Accepts]: Start accepts. Automaton has 82925 states and 221427 transitions. Word has length 374 [2021-06-05 18:13:30,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:30,417 INFO L482 AbstractCegarLoop]: Abstraction has 82925 states and 221427 transitions. [2021-06-05 18:13:30,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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) [2021-06-05 18:13:30,418 INFO L276 IsEmpty]: Start isEmpty. Operand 82925 states and 221427 transitions. [2021-06-05 18:13:30,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-06-05 18:13:30,512 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:30,512 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:13:30,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:30,713 INFO L430 AbstractCegarLoop]: === Iteration 52 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:30,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:30,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1507594316, now seen corresponding path program 21 times [2021-06-05 18:13:30,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:30,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527304782] [2021-06-05 18:13:30,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:30,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:30,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:13:30,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:30,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527304782] [2021-06-05 18:13:30,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527304782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:30,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368877940] [2021-06-05 18:13:30,860 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:31,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:13:31,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:31,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:13:31,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:31,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:13:31,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368877940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:31,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:31,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:13:31,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816664208] [2021-06-05 18:13:31,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:13:31,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:31,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:13:31,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:13:31,506 INFO L87 Difference]: Start difference. First operand 82925 states and 221427 transitions. Second operand has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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) [2021-06-05 18:13:32,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:32,019 INFO L93 Difference]: Finished difference Result 111730 states and 295808 transitions. [2021-06-05 18:13:32,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:13:32,019 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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 374 [2021-06-05 18:13:32,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:32,168 INFO L225 Difference]: With dead ends: 111730 [2021-06-05 18:13:32,168 INFO L226 Difference]: Without dead ends: 111730 [2021-06-05 18:13:32,168 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 237.6ms TimeCoverageRelationStatistics Valid=392, Invalid=1090, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:13:32,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111730 states. [2021-06-05 18:13:33,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111730 to 84745. [2021-06-05 18:13:33,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84745 states, 84743 states have (on average 2.670993474387265) internal successors, (226348), 84744 states have internal predecessors, (226348), 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) [2021-06-05 18:13:34,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84745 states to 84745 states and 226348 transitions. [2021-06-05 18:13:34,093 INFO L78 Accepts]: Start accepts. Automaton has 84745 states and 226348 transitions. Word has length 374 [2021-06-05 18:13:34,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:34,093 INFO L482 AbstractCegarLoop]: Abstraction has 84745 states and 226348 transitions. [2021-06-05 18:13:34,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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) [2021-06-05 18:13:34,093 INFO L276 IsEmpty]: Start isEmpty. Operand 84745 states and 226348 transitions. [2021-06-05 18:13:34,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-06-05 18:13:34,196 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:34,197 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:13:34,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:34,397 INFO L430 AbstractCegarLoop]: === Iteration 53 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:34,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:34,397 INFO L82 PathProgramCache]: Analyzing trace with hash 2091464368, now seen corresponding path program 22 times [2021-06-05 18:13:34,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:34,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893969230] [2021-06-05 18:13:34,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:34,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:34,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:13:34,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:34,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893969230] [2021-06-05 18:13:34,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893969230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:34,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286645808] [2021-06-05 18:13:34,542 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:34,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:13:34,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:34,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:13:34,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:35,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:13:35,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286645808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:35,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:35,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:13:35,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372771625] [2021-06-05 18:13:35,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:13:35,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:35,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:13:35,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:13:35,444 INFO L87 Difference]: Start difference. First operand 84745 states and 226348 transitions. Second operand has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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) [2021-06-05 18:13:35,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:35,975 INFO L93 Difference]: Finished difference Result 111965 states and 296607 transitions. [2021-06-05 18:13:35,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:13:35,975 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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 374 [2021-06-05 18:13:35,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:36,127 INFO L225 Difference]: With dead ends: 111965 [2021-06-05 18:13:36,128 INFO L226 Difference]: Without dead ends: 111965 [2021-06-05 18:13:36,397 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=382, Invalid=1024, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:13:36,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111965 states. [2021-06-05 18:13:37,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111965 to 88725. [2021-06-05 18:13:37,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88725 states, 88723 states have (on average 2.6732301657969186) internal successors, (237177), 88724 states have internal predecessors, (237177), 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) [2021-06-05 18:13:37,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88725 states to 88725 states and 237177 transitions. [2021-06-05 18:13:37,906 INFO L78 Accepts]: Start accepts. Automaton has 88725 states and 237177 transitions. Word has length 374 [2021-06-05 18:13:37,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:37,907 INFO L482 AbstractCegarLoop]: Abstraction has 88725 states and 237177 transitions. [2021-06-05 18:13:37,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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) [2021-06-05 18:13:37,907 INFO L276 IsEmpty]: Start isEmpty. Operand 88725 states and 237177 transitions. [2021-06-05 18:13:38,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-06-05 18:13:38,012 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:38,012 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:13:38,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 18:13:38,212 INFO L430 AbstractCegarLoop]: === Iteration 54 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:38,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:38,213 INFO L82 PathProgramCache]: Analyzing trace with hash -408310220, now seen corresponding path program 23 times [2021-06-05 18:13:38,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:38,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864958453] [2021-06-05 18:13:38,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:38,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:38,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:13:38,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:38,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864958453] [2021-06-05 18:13:38,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864958453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:38,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287751833] [2021-06-05 18:13:38,361 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:38,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:13:38,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:38,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:13:38,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:39,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:13:39,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287751833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:39,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:39,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:13:39,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527186451] [2021-06-05 18:13:39,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:13:39,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:39,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:13:39,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:13:39,021 INFO L87 Difference]: Start difference. First operand 88725 states and 237177 transitions. Second operand has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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) [2021-06-05 18:13:39,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:39,780 INFO L93 Difference]: Finished difference Result 113460 states and 300078 transitions. [2021-06-05 18:13:39,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:13:39,781 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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 374 [2021-06-05 18:13:39,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:39,926 INFO L225 Difference]: With dead ends: 113460 [2021-06-05 18:13:39,926 INFO L226 Difference]: Without dead ends: 113460 [2021-06-05 18:13:39,926 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 226.8ms TimeCoverageRelationStatistics Valid=372, Invalid=960, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:13:40,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113460 states. [2021-06-05 18:13:41,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113460 to 91625. [2021-06-05 18:13:41,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91625 states, 91623 states have (on average 2.674568612684588) internal successors, (245052), 91624 states have internal predecessors, (245052), 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) [2021-06-05 18:13:41,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91625 states to 91625 states and 245052 transitions. [2021-06-05 18:13:41,439 INFO L78 Accepts]: Start accepts. Automaton has 91625 states and 245052 transitions. Word has length 374 [2021-06-05 18:13:41,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:41,440 INFO L482 AbstractCegarLoop]: Abstraction has 91625 states and 245052 transitions. [2021-06-05 18:13:41,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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) [2021-06-05 18:13:41,440 INFO L276 IsEmpty]: Start isEmpty. Operand 91625 states and 245052 transitions. [2021-06-05 18:13:41,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-06-05 18:13:41,544 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:41,545 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:13:41,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:41,745 INFO L430 AbstractCegarLoop]: === Iteration 55 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:41,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:41,745 INFO L82 PathProgramCache]: Analyzing trace with hash -260642768, now seen corresponding path program 24 times [2021-06-05 18:13:41,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:41,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926059804] [2021-06-05 18:13:41,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:41,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:41,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:13:41,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:41,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926059804] [2021-06-05 18:13:41,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926059804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:41,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32344036] [2021-06-05 18:13:41,888 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:42,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:13:42,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:42,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:13:42,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:43,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:13:43,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32344036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:43,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:43,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:13:43,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779500033] [2021-06-05 18:13:43,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:13:43,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:43,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:13:43,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:13:43,010 INFO L87 Difference]: Start difference. First operand 91625 states and 245052 transitions. Second operand has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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) [2021-06-05 18:13:43,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:43,531 INFO L93 Difference]: Finished difference Result 109560 states and 290274 transitions. [2021-06-05 18:13:43,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:13:43,531 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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 374 [2021-06-05 18:13:43,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:43,674 INFO L225 Difference]: With dead ends: 109560 [2021-06-05 18:13:43,675 INFO L226 Difference]: Without dead ends: 109560 [2021-06-05 18:13:43,675 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 217.5ms TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:13:43,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109560 states. [2021-06-05 18:13:45,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109560 to 91625. [2021-06-05 18:13:45,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91625 states, 91623 states have (on average 2.674568612684588) internal successors, (245052), 91624 states have internal predecessors, (245052), 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) [2021-06-05 18:13:45,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91625 states to 91625 states and 245052 transitions. [2021-06-05 18:13:45,280 INFO L78 Accepts]: Start accepts. Automaton has 91625 states and 245052 transitions. Word has length 374 [2021-06-05 18:13:45,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:45,280 INFO L482 AbstractCegarLoop]: Abstraction has 91625 states and 245052 transitions. [2021-06-05 18:13:45,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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) [2021-06-05 18:13:45,280 INFO L276 IsEmpty]: Start isEmpty. Operand 91625 states and 245052 transitions. [2021-06-05 18:13:45,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-06-05 18:13:45,388 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:45,388 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:13:45,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 18:13:45,589 INFO L430 AbstractCegarLoop]: === Iteration 56 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:45,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:45,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1907192652, now seen corresponding path program 25 times [2021-06-05 18:13:45,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:45,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843341931] [2021-06-05 18:13:45,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:45,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1088 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 18:13:46,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:46,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843341931] [2021-06-05 18:13:46,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843341931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:46,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551229802] [2021-06-05 18:13:46,052 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:46,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:46,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:13:46,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:46,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:13:46,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551229802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:46,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:46,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:13:46,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25802223] [2021-06-05 18:13:46,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:13:46,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:46,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:13:46,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:13:46,555 INFO L87 Difference]: Start difference. First operand 91625 states and 245052 transitions. Second operand has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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) [2021-06-05 18:13:47,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:47,091 INFO L93 Difference]: Finished difference Result 104450 states and 277305 transitions. [2021-06-05 18:13:47,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:13:47,092 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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 374 [2021-06-05 18:13:47,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:47,229 INFO L225 Difference]: With dead ends: 104450 [2021-06-05 18:13:47,230 INFO L226 Difference]: Without dead ends: 104450 [2021-06-05 18:13:47,230 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 232.2ms TimeCoverageRelationStatistics Valid=425, Invalid=981, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:13:47,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104450 states. [2021-06-05 18:13:48,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104450 to 89465. [2021-06-05 18:13:48,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89465 states, 89463 states have (on average 2.6731050825480924) internal successors, (239144), 89464 states have internal predecessors, (239144), 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) [2021-06-05 18:13:49,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89465 states to 89465 states and 239144 transitions. [2021-06-05 18:13:49,040 INFO L78 Accepts]: Start accepts. Automaton has 89465 states and 239144 transitions. Word has length 374 [2021-06-05 18:13:49,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:49,040 INFO L482 AbstractCegarLoop]: Abstraction has 89465 states and 239144 transitions. [2021-06-05 18:13:49,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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) [2021-06-05 18:13:49,041 INFO L276 IsEmpty]: Start isEmpty. Operand 89465 states and 239144 transitions. [2021-06-05 18:13:49,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2021-06-05 18:13:49,153 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:49,153 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:13:49,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 18:13:49,354 INFO L430 AbstractCegarLoop]: === Iteration 57 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:49,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:49,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1195549329, now seen corresponding path program 10 times [2021-06-05 18:13:49,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:49,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374674641] [2021-06-05 18:13:49,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:49,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:13:49,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:49,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374674641] [2021-06-05 18:13:49,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374674641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:49,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713328202] [2021-06-05 18:13:49,557 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:49,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:13:49,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:49,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:49,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:50,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:13:50,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713328202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:50,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:50,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-05 18:13:50,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635494510] [2021-06-05 18:13:50,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:13:50,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:50,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:13:50,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:13:50,325 INFO L87 Difference]: Start difference. First operand 89465 states and 239144 transitions. Second operand has 25 states, 25 states have (on average 18.04) internal successors, (451), 25 states have internal predecessors, (451), 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) [2021-06-05 18:13:50,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:50,912 INFO L93 Difference]: Finished difference Result 101502 states and 269889 transitions. [2021-06-05 18:13:50,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:13:50,913 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 18.04) internal successors, (451), 25 states have internal predecessors, (451), 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 404 [2021-06-05 18:13:50,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:51,041 INFO L225 Difference]: With dead ends: 101502 [2021-06-05 18:13:51,041 INFO L226 Difference]: Without dead ends: 101502 [2021-06-05 18:13:51,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 403 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 334.9ms TimeCoverageRelationStatistics Valid=631, Invalid=1349, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:13:51,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101502 states. [2021-06-05 18:13:52,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101502 to 93860. [2021-06-05 18:13:52,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93860 states, 93858 states have (on average 2.6721856421402546) internal successors, (250806), 93859 states have internal predecessors, (250806), 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) [2021-06-05 18:13:52,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93860 states to 93860 states and 250806 transitions. [2021-06-05 18:13:52,708 INFO L78 Accepts]: Start accepts. Automaton has 93860 states and 250806 transitions. Word has length 404 [2021-06-05 18:13:52,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:52,709 INFO L482 AbstractCegarLoop]: Abstraction has 93860 states and 250806 transitions. [2021-06-05 18:13:52,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 18.04) internal successors, (451), 25 states have internal predecessors, (451), 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) [2021-06-05 18:13:52,709 INFO L276 IsEmpty]: Start isEmpty. Operand 93860 states and 250806 transitions. [2021-06-05 18:13:52,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-06-05 18:13:52,818 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:52,819 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:13:53,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 18:13:53,019 INFO L430 AbstractCegarLoop]: === Iteration 58 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:53,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:53,019 INFO L82 PathProgramCache]: Analyzing trace with hash -350583698, now seen corresponding path program 19 times [2021-06-05 18:13:53,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:53,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134639127] [2021-06-05 18:13:53,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:53,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:53,135 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 831 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:13:53,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:53,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134639127] [2021-06-05 18:13:53,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134639127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:53,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544419825] [2021-06-05 18:13:53,135 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:53,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:53,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:53,675 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 831 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:13:53,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544419825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:53,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:53,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 18:13:53,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828087904] [2021-06-05 18:13:53,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:13:53,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:53,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:13:53,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:13:53,677 INFO L87 Difference]: Start difference. First operand 93860 states and 250806 transitions. Second operand has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 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) [2021-06-05 18:13:54,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:54,401 INFO L93 Difference]: Finished difference Result 142070 states and 376080 transitions. [2021-06-05 18:13:54,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:13:54,401 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 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 407 [2021-06-05 18:13:54,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:54,578 INFO L225 Difference]: With dead ends: 142070 [2021-06-05 18:13:54,578 INFO L226 Difference]: Without dead ends: 142070 [2021-06-05 18:13:54,578 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 149.7ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:13:54,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142070 states. [2021-06-05 18:13:56,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142070 to 90700. [2021-06-05 18:13:56,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90700 states, 90698 states have (on average 2.671150411254934) internal successors, (242268), 90699 states have internal predecessors, (242268), 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) [2021-06-05 18:13:56,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90700 states to 90700 states and 242268 transitions. [2021-06-05 18:13:56,487 INFO L78 Accepts]: Start accepts. Automaton has 90700 states and 242268 transitions. Word has length 407 [2021-06-05 18:13:56,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:56,488 INFO L482 AbstractCegarLoop]: Abstraction has 90700 states and 242268 transitions. [2021-06-05 18:13:56,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 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) [2021-06-05 18:13:56,488 INFO L276 IsEmpty]: Start isEmpty. Operand 90700 states and 242268 transitions. [2021-06-05 18:13:56,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-06-05 18:13:56,942 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:56,942 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:13:57,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 18:13:57,157 INFO L430 AbstractCegarLoop]: === Iteration 59 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:57,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:57,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1291176474, now seen corresponding path program 20 times [2021-06-05 18:13:57,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:57,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634290249] [2021-06-05 18:13:57,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:57,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:57,287 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 854 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-06-05 18:13:57,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:57,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634290249] [2021-06-05 18:13:57,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634290249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:57,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368593417] [2021-06-05 18:13:57,287 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:57,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:13:57,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:57,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:57,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:57,814 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 831 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:13:57,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368593417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:57,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:57,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-06-05 18:13:57,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466725879] [2021-06-05 18:13:57,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:13:57,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:57,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:13:57,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:13:57,816 INFO L87 Difference]: Start difference. First operand 90700 states and 242268 transitions. Second operand has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 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) [2021-06-05 18:13:58,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:58,318 INFO L93 Difference]: Finished difference Result 125225 states and 331936 transitions. [2021-06-05 18:13:58,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:13:58,319 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 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 407 [2021-06-05 18:13:58,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:58,491 INFO L225 Difference]: With dead ends: 125225 [2021-06-05 18:13:58,491 INFO L226 Difference]: Without dead ends: 125225 [2021-06-05 18:13:58,491 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 165.7ms TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:13:58,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125225 states. [2021-06-05 18:14:00,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125225 to 92520. [2021-06-05 18:14:00,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92520 states, 92518 states have (on average 2.67179359692168) internal successors, (247189), 92519 states have internal predecessors, (247189), 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) [2021-06-05 18:14:00,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92520 states to 92520 states and 247189 transitions. [2021-06-05 18:14:00,466 INFO L78 Accepts]: Start accepts. Automaton has 92520 states and 247189 transitions. Word has length 407 [2021-06-05 18:14:00,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:00,466 INFO L482 AbstractCegarLoop]: Abstraction has 92520 states and 247189 transitions. [2021-06-05 18:14:00,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 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) [2021-06-05 18:14:00,467 INFO L276 IsEmpty]: Start isEmpty. Operand 92520 states and 247189 transitions. [2021-06-05 18:14:00,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-06-05 18:14:00,573 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:00,574 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:14:00,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:00,774 INFO L430 AbstractCegarLoop]: === Iteration 60 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:00,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:00,775 INFO L82 PathProgramCache]: Analyzing trace with hash 744814788, now seen corresponding path program 21 times [2021-06-05 18:14:00,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:00,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979035309] [2021-06-05 18:14:00,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:00,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:00,898 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 854 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-06-05 18:14:00,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:00,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979035309] [2021-06-05 18:14:00,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979035309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:00,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791107036] [2021-06-05 18:14:00,898 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:01,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 18:14:01,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:01,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:01,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:01,574 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 831 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:14:01,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791107036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:01,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:01,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-06-05 18:14:01,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503202913] [2021-06-05 18:14:01,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:14:01,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:01,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:14:01,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:14:01,575 INFO L87 Difference]: Start difference. First operand 92520 states and 247189 transitions. Second operand has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 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) [2021-06-05 18:14:02,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:02,319 INFO L93 Difference]: Finished difference Result 130760 states and 346823 transitions. [2021-06-05 18:14:02,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:14:02,320 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 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 407 [2021-06-05 18:14:02,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:02,481 INFO L225 Difference]: With dead ends: 130760 [2021-06-05 18:14:02,482 INFO L226 Difference]: Without dead ends: 130760 [2021-06-05 18:14:02,482 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 160.4ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:14:02,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130760 states. [2021-06-05 18:14:03,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130760 to 94680. [2021-06-05 18:14:04,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94680 states, 94678 states have (on average 2.6732398234014236) internal successors, (253097), 94679 states have internal predecessors, (253097), 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) [2021-06-05 18:14:04,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94680 states to 94680 states and 253097 transitions. [2021-06-05 18:14:04,244 INFO L78 Accepts]: Start accepts. Automaton has 94680 states and 253097 transitions. Word has length 407 [2021-06-05 18:14:04,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:04,245 INFO L482 AbstractCegarLoop]: Abstraction has 94680 states and 253097 transitions. [2021-06-05 18:14:04,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 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) [2021-06-05 18:14:04,245 INFO L276 IsEmpty]: Start isEmpty. Operand 94680 states and 253097 transitions. [2021-06-05 18:14:04,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-06-05 18:14:04,361 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:04,361 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:14:04,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 18:14:04,562 INFO L430 AbstractCegarLoop]: === Iteration 61 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:04,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:04,562 INFO L82 PathProgramCache]: Analyzing trace with hash -380464090, now seen corresponding path program 22 times [2021-06-05 18:14:04,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:04,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201138183] [2021-06-05 18:14:04,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:04,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:05,016 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 854 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-06-05 18:14:05,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:05,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201138183] [2021-06-05 18:14:05,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201138183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:05,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485078837] [2021-06-05 18:14:05,017 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:05,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:14:05,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:05,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:05,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 831 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:14:05,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485078837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:05,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:05,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-06-05 18:14:05,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685078850] [2021-06-05 18:14:05,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:14:05,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:05,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:14:05,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:14:05,778 INFO L87 Difference]: Start difference. First operand 94680 states and 253097 transitions. Second operand has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 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) [2021-06-05 18:14:06,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:06,334 INFO L93 Difference]: Finished difference Result 131870 states and 349283 transitions. [2021-06-05 18:14:06,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:14:06,335 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 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 407 [2021-06-05 18:14:06,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:06,502 INFO L225 Difference]: With dead ends: 131870 [2021-06-05 18:14:06,502 INFO L226 Difference]: Without dead ends: 131870 [2021-06-05 18:14:06,502 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 191.5ms TimeCoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:14:06,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131870 states. [2021-06-05 18:14:08,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131870 to 102420. [2021-06-05 18:14:08,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102420 states, 102418 states have (on average 2.676424066082134) internal successors, (274114), 102419 states have internal predecessors, (274114), 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) [2021-06-05 18:14:08,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102420 states to 102420 states and 274114 transitions. [2021-06-05 18:14:08,536 INFO L78 Accepts]: Start accepts. Automaton has 102420 states and 274114 transitions. Word has length 407 [2021-06-05 18:14:08,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:08,536 INFO L482 AbstractCegarLoop]: Abstraction has 102420 states and 274114 transitions. [2021-06-05 18:14:08,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 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) [2021-06-05 18:14:08,536 INFO L276 IsEmpty]: Start isEmpty. Operand 102420 states and 274114 transitions. [2021-06-05 18:14:08,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-06-05 18:14:08,669 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:08,669 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:14:08,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:08,870 INFO L430 AbstractCegarLoop]: === Iteration 62 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:08,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:08,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1056604171, now seen corresponding path program 23 times [2021-06-05 18:14:08,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:08,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229097548] [2021-06-05 18:14:08,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:09,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:14:09,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:09,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229097548] [2021-06-05 18:14:09,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229097548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:09,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753604871] [2021-06-05 18:14:09,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:09,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:14:09,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:09,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:09,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:09,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:14:09,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753604871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:09,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:09,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:14:09,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959309435] [2021-06-05 18:14:09,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:14:09,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:09,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:14:09,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:14:09,820 INFO L87 Difference]: Start difference. First operand 102420 states and 274114 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-06-05 18:14:10,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:10,672 INFO L93 Difference]: Finished difference Result 135700 states and 360529 transitions. [2021-06-05 18:14:10,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:14:10,672 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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 408 [2021-06-05 18:14:10,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:10,846 INFO L225 Difference]: With dead ends: 135700 [2021-06-05 18:14:10,846 INFO L226 Difference]: Without dead ends: 135700 [2021-06-05 18:14:10,846 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 219.8ms TimeCoverageRelationStatistics Valid=338, Invalid=1068, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:14:11,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135700 states. [2021-06-05 18:14:12,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135700 to 98780. [2021-06-05 18:14:12,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98780 states, 98778 states have (on average 2.675413553625301) internal successors, (264272), 98779 states have internal predecessors, (264272), 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) [2021-06-05 18:14:12,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98780 states to 98780 states and 264272 transitions. [2021-06-05 18:14:12,725 INFO L78 Accepts]: Start accepts. Automaton has 98780 states and 264272 transitions. Word has length 408 [2021-06-05 18:14:12,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:12,725 INFO L482 AbstractCegarLoop]: Abstraction has 98780 states and 264272 transitions. [2021-06-05 18:14:12,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-06-05 18:14:12,725 INFO L276 IsEmpty]: Start isEmpty. Operand 98780 states and 264272 transitions. [2021-06-05 18:14:13,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-06-05 18:14:13,176 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:13,176 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:14:13,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 18:14:13,376 INFO L430 AbstractCegarLoop]: === Iteration 63 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:13,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:13,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1813657235, now seen corresponding path program 24 times [2021-06-05 18:14:13,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:13,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778350480] [2021-06-05 18:14:13,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:13,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:13,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:14:13,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:13,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778350480] [2021-06-05 18:14:13,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778350480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:13,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41997348] [2021-06-05 18:14:13,519 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:13,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:14:13,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:13,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:13,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:14,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:14:14,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41997348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:14,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:14,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:14:14,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096829383] [2021-06-05 18:14:14,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:14:14,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:14,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:14:14,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:14:14,382 INFO L87 Difference]: Start difference. First operand 98780 states and 264272 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-06-05 18:14:14,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:14,981 INFO L93 Difference]: Finished difference Result 152985 states and 407630 transitions. [2021-06-05 18:14:14,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:14:14,982 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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 408 [2021-06-05 18:14:14,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:15,202 INFO L225 Difference]: With dead ends: 152985 [2021-06-05 18:14:15,202 INFO L226 Difference]: Without dead ends: 152985 [2021-06-05 18:14:15,202 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 244.8ms TimeCoverageRelationStatistics Valid=326, Invalid=1006, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:14:15,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152985 states. [2021-06-05 18:14:17,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152985 to 98780. [2021-06-05 18:14:17,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98780 states, 98778 states have (on average 2.675413553625301) internal successors, (264272), 98779 states have internal predecessors, (264272), 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) [2021-06-05 18:14:17,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98780 states to 98780 states and 264272 transitions. [2021-06-05 18:14:17,520 INFO L78 Accepts]: Start accepts. Automaton has 98780 states and 264272 transitions. Word has length 408 [2021-06-05 18:14:17,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:17,520 INFO L482 AbstractCegarLoop]: Abstraction has 98780 states and 264272 transitions. [2021-06-05 18:14:17,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-06-05 18:14:17,521 INFO L276 IsEmpty]: Start isEmpty. Operand 98780 states and 264272 transitions. [2021-06-05 18:14:17,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-06-05 18:14:17,635 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:17,635 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:14:17,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:17,836 INFO L430 AbstractCegarLoop]: === Iteration 64 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:17,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:17,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1356031183, now seen corresponding path program 25 times [2021-06-05 18:14:17,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:17,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373983739] [2021-06-05 18:14:17,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:14:17,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:17,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373983739] [2021-06-05 18:14:17,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373983739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:17,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975835322] [2021-06-05 18:14:17,976 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:18,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:18,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:18,657 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:14:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:14:18,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975835322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:18,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:18,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:14:18,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143870368] [2021-06-05 18:14:18,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:14:18,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:18,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:14:18,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:14:18,826 INFO L87 Difference]: Start difference. First operand 98780 states and 264272 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-06-05 18:14:19,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:19,364 INFO L93 Difference]: Finished difference Result 132670 states and 352212 transitions. [2021-06-05 18:14:19,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:14:19,364 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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 408 [2021-06-05 18:14:19,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:19,539 INFO L225 Difference]: With dead ends: 132670 [2021-06-05 18:14:19,540 INFO L226 Difference]: Without dead ends: 132670 [2021-06-05 18:14:19,540 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 212.2ms TimeCoverageRelationStatistics Valid=328, Invalid=1004, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:14:19,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132670 states. [2021-06-05 18:14:21,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132670 to 101940. [2021-06-05 18:14:21,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101940 states, 101938 states have (on average 2.6762345739567186) internal successors, (272810), 101939 states have internal predecessors, (272810), 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) [2021-06-05 18:14:21,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101940 states to 101940 states and 272810 transitions. [2021-06-05 18:14:21,760 INFO L78 Accepts]: Start accepts. Automaton has 101940 states and 272810 transitions. Word has length 408 [2021-06-05 18:14:21,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:21,760 INFO L482 AbstractCegarLoop]: Abstraction has 101940 states and 272810 transitions. [2021-06-05 18:14:21,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-06-05 18:14:21,760 INFO L276 IsEmpty]: Start isEmpty. Operand 101940 states and 272810 transitions. [2021-06-05 18:14:21,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-06-05 18:14:21,889 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:21,889 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:14:22,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 18:14:22,103 INFO L430 AbstractCegarLoop]: === Iteration 65 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:22,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:22,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1505447157, now seen corresponding path program 26 times [2021-06-05 18:14:22,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:22,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457781449] [2021-06-05 18:14:22,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:22,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:22,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:14:22,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:22,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457781449] [2021-06-05 18:14:22,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457781449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:22,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249991670] [2021-06-05 18:14:22,249 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:22,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:14:22,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:22,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:22,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:22,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:14:22,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249991670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:22,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:22,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:14:22,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54605531] [2021-06-05 18:14:22,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:14:22,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:22,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:14:22,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:14:22,818 INFO L87 Difference]: Start difference. First operand 101940 states and 272810 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-06-05 18:14:23,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:23,740 INFO L93 Difference]: Finished difference Result 156300 states and 415942 transitions. [2021-06-05 18:14:23,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:14:23,740 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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 408 [2021-06-05 18:14:23,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:23,931 INFO L225 Difference]: With dead ends: 156300 [2021-06-05 18:14:23,931 INFO L226 Difference]: Without dead ends: 156300 [2021-06-05 18:14:23,932 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 222.5ms TimeCoverageRelationStatistics Valid=325, Invalid=1007, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:14:24,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156300 states. [2021-06-05 18:14:25,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156300 to 101940. [2021-06-05 18:14:25,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101940 states, 101938 states have (on average 2.6762345739567186) internal successors, (272810), 101939 states have internal predecessors, (272810), 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) [2021-06-05 18:14:25,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101940 states to 101940 states and 272810 transitions. [2021-06-05 18:14:25,944 INFO L78 Accepts]: Start accepts. Automaton has 101940 states and 272810 transitions. Word has length 408 [2021-06-05 18:14:25,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:25,944 INFO L482 AbstractCegarLoop]: Abstraction has 101940 states and 272810 transitions. [2021-06-05 18:14:25,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-06-05 18:14:25,944 INFO L276 IsEmpty]: Start isEmpty. Operand 101940 states and 272810 transitions. [2021-06-05 18:14:26,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-06-05 18:14:26,084 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:26,085 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:14:26,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:26,289 INFO L430 AbstractCegarLoop]: === Iteration 66 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:26,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:26,290 INFO L82 PathProgramCache]: Analyzing trace with hash 380168279, now seen corresponding path program 27 times [2021-06-05 18:14:26,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:26,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132803205] [2021-06-05 18:14:26,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:26,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:26,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:14:26,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:26,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132803205] [2021-06-05 18:14:26,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132803205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:26,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744286991] [2021-06-05 18:14:26,782 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:27,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:14:27,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:27,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:27,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:27,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:14:27,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744286991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:27,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:27,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:14:27,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718340013] [2021-06-05 18:14:27,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:14:27,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:27,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:14:27,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:14:27,551 INFO L87 Difference]: Start difference. First operand 101940 states and 272810 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-06-05 18:14:28,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:28,174 INFO L93 Difference]: Finished difference Result 161260 states and 429321 transitions. [2021-06-05 18:14:28,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:14:28,174 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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 408 [2021-06-05 18:14:28,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:28,402 INFO L225 Difference]: With dead ends: 161260 [2021-06-05 18:14:28,402 INFO L226 Difference]: Without dead ends: 161260 [2021-06-05 18:14:28,402 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 572.8ms TimeCoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:14:28,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161260 states. [2021-06-05 18:14:30,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161260 to 103760. [2021-06-05 18:14:30,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103760 states, 103758 states have (on average 2.6767189036026138) internal successors, (277731), 103759 states have internal predecessors, (277731), 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) [2021-06-05 18:14:30,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103760 states to 103760 states and 277731 transitions. [2021-06-05 18:14:30,729 INFO L78 Accepts]: Start accepts. Automaton has 103760 states and 277731 transitions. Word has length 408 [2021-06-05 18:14:30,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:30,729 INFO L482 AbstractCegarLoop]: Abstraction has 103760 states and 277731 transitions. [2021-06-05 18:14:30,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-06-05 18:14:30,729 INFO L276 IsEmpty]: Start isEmpty. Operand 103760 states and 277731 transitions. [2021-06-05 18:14:30,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-06-05 18:14:30,861 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:30,862 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:14:31,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 18:14:31,062 INFO L430 AbstractCegarLoop]: === Iteration 67 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:31,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:31,062 INFO L82 PathProgramCache]: Analyzing trace with hash -772734539, now seen corresponding path program 28 times [2021-06-05 18:14:31,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:31,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154391540] [2021-06-05 18:14:31,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:31,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:31,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:14:31,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:31,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154391540] [2021-06-05 18:14:31,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154391540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:31,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199331568] [2021-06-05 18:14:31,203 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:31,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:14:31,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:31,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:31,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:32,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:14:32,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199331568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:32,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:32,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:14:32,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236437994] [2021-06-05 18:14:32,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:14:32,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:32,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:14:32,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:14:32,045 INFO L87 Difference]: Start difference. First operand 103760 states and 277731 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-06-05 18:14:32,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:32,933 INFO L93 Difference]: Finished difference Result 133775 states and 354173 transitions. [2021-06-05 18:14:32,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:14:32,934 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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 408 [2021-06-05 18:14:32,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:33,098 INFO L225 Difference]: With dead ends: 133775 [2021-06-05 18:14:33,098 INFO L226 Difference]: Without dead ends: 133775 [2021-06-05 18:14:33,098 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 239.9ms TimeCoverageRelationStatistics Valid=318, Invalid=942, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:14:33,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133775 states. [2021-06-05 18:14:34,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133775 to 104020. [2021-06-05 18:14:34,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104020 states, 104018 states have (on average 2.6764021611644138) internal successors, (278394), 104019 states have internal predecessors, (278394), 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) [2021-06-05 18:14:35,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104020 states to 104020 states and 278394 transitions. [2021-06-05 18:14:35,423 INFO L78 Accepts]: Start accepts. Automaton has 104020 states and 278394 transitions. Word has length 408 [2021-06-05 18:14:35,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:35,424 INFO L482 AbstractCegarLoop]: Abstraction has 104020 states and 278394 transitions. [2021-06-05 18:14:35,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-06-05 18:14:35,424 INFO L276 IsEmpty]: Start isEmpty. Operand 104020 states and 278394 transitions. [2021-06-05 18:14:35,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-06-05 18:14:35,565 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:35,565 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:14:35,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:35,767 INFO L430 AbstractCegarLoop]: === Iteration 68 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:35,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:35,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1999953005, now seen corresponding path program 29 times [2021-06-05 18:14:35,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:35,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996661330] [2021-06-05 18:14:35,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:35,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:14:35,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:35,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996661330] [2021-06-05 18:14:35,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996661330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:35,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390886600] [2021-06-05 18:14:35,905 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:36,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:14:36,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:36,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:36,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:36,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:14:36,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390886600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:36,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:36,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:14:36,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206745105] [2021-06-05 18:14:36,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:14:36,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:36,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:14:36,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:14:36,666 INFO L87 Difference]: Start difference. First operand 104020 states and 278394 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-06-05 18:14:37,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:37,323 INFO L93 Difference]: Finished difference Result 154635 states and 411610 transitions. [2021-06-05 18:14:37,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:14:37,324 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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 408 [2021-06-05 18:14:37,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:37,873 INFO L225 Difference]: With dead ends: 154635 [2021-06-05 18:14:37,873 INFO L226 Difference]: Without dead ends: 154635 [2021-06-05 18:14:37,873 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 226.7ms TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:14:38,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154635 states. [2021-06-05 18:14:39,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154635 to 105100. [2021-06-05 18:14:39,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105100 states, 105098 states have (on average 2.677006222763516) internal successors, (281348), 105099 states have internal predecessors, (281348), 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) [2021-06-05 18:14:39,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105100 states to 105100 states and 281348 transitions. [2021-06-05 18:14:39,801 INFO L78 Accepts]: Start accepts. Automaton has 105100 states and 281348 transitions. Word has length 408 [2021-06-05 18:14:39,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:39,801 INFO L482 AbstractCegarLoop]: Abstraction has 105100 states and 281348 transitions. [2021-06-05 18:14:39,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-06-05 18:14:39,801 INFO L276 IsEmpty]: Start isEmpty. Operand 105100 states and 281348 transitions. [2021-06-05 18:14:39,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-06-05 18:14:39,935 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:39,935 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:14:40,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 18:14:40,135 INFO L430 AbstractCegarLoop]: === Iteration 69 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:40,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:40,136 INFO L82 PathProgramCache]: Analyzing trace with hash 874674127, now seen corresponding path program 30 times [2021-06-05 18:14:40,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:40,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831516802] [2021-06-05 18:14:40,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:40,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:40,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:14:40,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:40,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831516802] [2021-06-05 18:14:40,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831516802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:40,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522390473] [2021-06-05 18:14:40,274 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:41,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:14:41,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:41,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:41,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:41,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:14:41,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522390473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:41,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:41,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:14:41,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447705534] [2021-06-05 18:14:41,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:14:41,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:41,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:14:41,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:14:41,493 INFO L87 Difference]: Start difference. First operand 105100 states and 281348 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-06-05 18:14:42,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:42,377 INFO L93 Difference]: Finished difference Result 165320 states and 440234 transitions. [2021-06-05 18:14:42,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:14:42,377 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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 408 [2021-06-05 18:14:42,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:42,618 INFO L225 Difference]: With dead ends: 165320 [2021-06-05 18:14:42,618 INFO L226 Difference]: Without dead ends: 165320 [2021-06-05 18:14:42,618 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 208.2ms TimeCoverageRelationStatistics Valid=315, Invalid=945, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:14:42,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165320 states. [2021-06-05 18:14:44,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165320 to 104020. [2021-06-05 18:14:44,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104020 states, 104018 states have (on average 2.6764021611644138) internal successors, (278394), 104019 states have internal predecessors, (278394), 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) [2021-06-05 18:14:44,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104020 states to 104020 states and 278394 transitions. [2021-06-05 18:14:44,613 INFO L78 Accepts]: Start accepts. Automaton has 104020 states and 278394 transitions. Word has length 408 [2021-06-05 18:14:44,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:44,613 INFO L482 AbstractCegarLoop]: Abstraction has 104020 states and 278394 transitions. [2021-06-05 18:14:44,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-06-05 18:14:44,614 INFO L276 IsEmpty]: Start isEmpty. Operand 104020 states and 278394 transitions. [2021-06-05 18:14:45,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-06-05 18:14:45,122 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:45,123 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:14:45,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 18:14:45,340 INFO L430 AbstractCegarLoop]: === Iteration 70 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:45,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:45,340 INFO L82 PathProgramCache]: Analyzing trace with hash -278228691, now seen corresponding path program 31 times [2021-06-05 18:14:45,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:45,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207747450] [2021-06-05 18:14:45,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:45,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:45,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:14:45,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:45,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207747450] [2021-06-05 18:14:45,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207747450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:45,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472012905] [2021-06-05 18:14:45,476 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:45,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:45,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:46,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:14:46,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472012905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:46,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:46,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:14:46,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663270502] [2021-06-05 18:14:46,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:14:46,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:46,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:14:46,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:14:46,006 INFO L87 Difference]: Start difference. First operand 104020 states and 278394 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-06-05 18:14:46,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:46,596 INFO L93 Difference]: Finished difference Result 160275 states and 426785 transitions. [2021-06-05 18:14:46,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:14:46,596 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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 408 [2021-06-05 18:14:46,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:46,803 INFO L225 Difference]: With dead ends: 160275 [2021-06-05 18:14:46,803 INFO L226 Difference]: Without dead ends: 160275 [2021-06-05 18:14:46,803 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 198.7ms TimeCoverageRelationStatistics Valid=306, Invalid=884, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:14:47,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160275 states. [2021-06-05 18:14:48,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160275 to 109480. [2021-06-05 18:14:48,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109480 states, 109478 states have (on average 2.677770876340452) internal successors, (293157), 109479 states have internal predecessors, (293157), 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) [2021-06-05 18:14:49,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109480 states to 109480 states and 293157 transitions. [2021-06-05 18:14:49,064 INFO L78 Accepts]: Start accepts. Automaton has 109480 states and 293157 transitions. Word has length 408 [2021-06-05 18:14:49,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:49,064 INFO L482 AbstractCegarLoop]: Abstraction has 109480 states and 293157 transitions. [2021-06-05 18:14:49,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-06-05 18:14:49,065 INFO L276 IsEmpty]: Start isEmpty. Operand 109480 states and 293157 transitions. [2021-06-05 18:14:49,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-06-05 18:14:49,204 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:49,205 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:14:49,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 18:14:49,405 INFO L430 AbstractCegarLoop]: === Iteration 71 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:49,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:49,406 INFO L82 PathProgramCache]: Analyzing trace with hash 182094607, now seen corresponding path program 32 times [2021-06-05 18:14:49,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:49,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723477640] [2021-06-05 18:14:49,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:49,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:49,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:14:49,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:49,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723477640] [2021-06-05 18:14:49,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723477640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:49,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893191081] [2021-06-05 18:14:49,543 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:49,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:14:49,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:49,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:49,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:14:50,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893191081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:50,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:50,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:14:50,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739473317] [2021-06-05 18:14:50,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:14:50,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:50,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:14:50,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:14:50,492 INFO L87 Difference]: Start difference. First operand 109480 states and 293157 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-06-05 18:14:51,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:51,043 INFO L93 Difference]: Finished difference Result 135850 states and 359912 transitions. [2021-06-05 18:14:51,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:14:51,044 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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 408 [2021-06-05 18:14:51,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:51,218 INFO L225 Difference]: With dead ends: 135850 [2021-06-05 18:14:51,219 INFO L226 Difference]: Without dead ends: 135850 [2021-06-05 18:14:51,219 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 203.6ms TimeCoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:14:51,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135850 states. [2021-06-05 18:14:53,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135850 to 114800. [2021-06-05 18:14:53,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114800 states, 114798 states have (on average 2.679515322566595) internal successors, (307603), 114799 states have internal predecessors, (307603), 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) [2021-06-05 18:14:53,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114800 states to 114800 states and 307603 transitions. [2021-06-05 18:14:53,460 INFO L78 Accepts]: Start accepts. Automaton has 114800 states and 307603 transitions. Word has length 408 [2021-06-05 18:14:53,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:53,461 INFO L482 AbstractCegarLoop]: Abstraction has 114800 states and 307603 transitions. [2021-06-05 18:14:53,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-06-05 18:14:53,461 INFO L276 IsEmpty]: Start isEmpty. Operand 114800 states and 307603 transitions. [2021-06-05 18:14:53,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-06-05 18:14:53,597 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:53,597 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:14:53,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:53,798 INFO L430 AbstractCegarLoop]: === Iteration 72 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:53,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:53,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1388619275, now seen corresponding path program 33 times [2021-06-05 18:14:53,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:53,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786426766] [2021-06-05 18:14:53,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:53,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1084 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-06-05 18:14:53,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:53,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786426766] [2021-06-05 18:14:53,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786426766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:53,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574975895] [2021-06-05 18:14:53,948 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:54,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:14:54,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:54,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:54,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:14:54,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574975895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:54,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:54,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-06-05 18:14:54,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684634174] [2021-06-05 18:14:54,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:14:54,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:54,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:14:54,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:14:54,705 INFO L87 Difference]: Start difference. First operand 114800 states and 307603 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-06-05 18:14:55,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:55,635 INFO L93 Difference]: Finished difference Result 150170 states and 399764 transitions. [2021-06-05 18:14:55,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:14:55,636 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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 408 [2021-06-05 18:14:55,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:55,825 INFO L225 Difference]: With dead ends: 150170 [2021-06-05 18:14:55,826 INFO L226 Difference]: Without dead ends: 150170 [2021-06-05 18:14:55,826 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 238.6ms TimeCoverageRelationStatistics Valid=393, Invalid=1167, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:14:56,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150170 states. [2021-06-05 18:14:57,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150170 to 114800. [2021-06-05 18:14:57,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114800 states, 114798 states have (on average 2.679515322566595) internal successors, (307603), 114799 states have internal predecessors, (307603), 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) [2021-06-05 18:14:58,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114800 states to 114800 states and 307603 transitions. [2021-06-05 18:14:58,236 INFO L78 Accepts]: Start accepts. Automaton has 114800 states and 307603 transitions. Word has length 408 [2021-06-05 18:14:58,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:58,237 INFO L482 AbstractCegarLoop]: Abstraction has 114800 states and 307603 transitions. [2021-06-05 18:14:58,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-06-05 18:14:58,237 INFO L276 IsEmpty]: Start isEmpty. Operand 114800 states and 307603 transitions. [2021-06-05 18:14:58,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-06-05 18:14:58,371 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:58,372 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:14:58,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:58,573 INFO L430 AbstractCegarLoop]: === Iteration 73 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:58,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:58,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1781069143, now seen corresponding path program 34 times [2021-06-05 18:14:58,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:58,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897508485] [2021-06-05 18:14:58,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:58,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:58,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1084 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-06-05 18:14:58,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:58,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897508485] [2021-06-05 18:14:58,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897508485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:58,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462493167] [2021-06-05 18:14:58,724 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:59,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:14:59,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:59,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:59,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:59,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:14:59,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462493167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:59,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:59,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-06-05 18:14:59,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674201137] [2021-06-05 18:14:59,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:14:59,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:59,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:14:59,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:14:59,521 INFO L87 Difference]: Start difference. First operand 114800 states and 307603 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-06-05 18:15:00,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:00,448 INFO L93 Difference]: Finished difference Result 157890 states and 420467 transitions. [2021-06-05 18:15:00,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:15:00,449 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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 408 [2021-06-05 18:15:00,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:00,641 INFO L225 Difference]: With dead ends: 157890 [2021-06-05 18:15:00,641 INFO L226 Difference]: Without dead ends: 157890 [2021-06-05 18:15:00,642 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 229.8ms TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:15:00,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157890 states. [2021-06-05 18:15:02,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157890 to 113720. [2021-06-05 18:15:02,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113720 states, 113718 states have (on average 2.6789866160150546) internal successors, (304649), 113719 states have internal predecessors, (304649), 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) [2021-06-05 18:15:02,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113720 states to 113720 states and 304649 transitions. [2021-06-05 18:15:02,613 INFO L78 Accepts]: Start accepts. Automaton has 113720 states and 304649 transitions. Word has length 408 [2021-06-05 18:15:02,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:02,613 INFO L482 AbstractCegarLoop]: Abstraction has 113720 states and 304649 transitions. [2021-06-05 18:15:02,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-06-05 18:15:02,614 INFO L276 IsEmpty]: Start isEmpty. Operand 113720 states and 304649 transitions. [2021-06-05 18:15:02,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-06-05 18:15:02,760 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:02,760 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:03,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:03,356 INFO L430 AbstractCegarLoop]: === Iteration 74 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:03,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:03,356 INFO L82 PathProgramCache]: Analyzing trace with hash 628166325, now seen corresponding path program 35 times [2021-06-05 18:15:03,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:03,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426848911] [2021-06-05 18:15:03,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:03,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:03,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1084 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-06-05 18:15:03,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:03,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426848911] [2021-06-05 18:15:03,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426848911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:03,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303064990] [2021-06-05 18:15:03,517 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:03,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:15:03,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:03,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:15:03,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:04,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:15:04,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303064990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:04,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:04,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-06-05 18:15:04,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272747359] [2021-06-05 18:15:04,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:15:04,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:04,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:15:04,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:15:04,256 INFO L87 Difference]: Start difference. First operand 113720 states and 304649 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-06-05 18:15:04,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:04,875 INFO L93 Difference]: Finished difference Result 160390 states and 426475 transitions. [2021-06-05 18:15:04,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:15:04,876 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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 408 [2021-06-05 18:15:04,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:05,090 INFO L225 Difference]: With dead ends: 160390 [2021-06-05 18:15:05,090 INFO L226 Difference]: Without dead ends: 160390 [2021-06-05 18:15:05,090 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 220.0ms TimeCoverageRelationStatistics Valid=373, Invalid=1033, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:15:05,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160390 states. [2021-06-05 18:15:07,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160390 to 117360. [2021-06-05 18:15:07,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117360 states, 117358 states have (on average 2.6797576645818775) internal successors, (314491), 117359 states have internal predecessors, (314491), 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) [2021-06-05 18:15:07,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117360 states to 117360 states and 314491 transitions. [2021-06-05 18:15:07,473 INFO L78 Accepts]: Start accepts. Automaton has 117360 states and 314491 transitions. Word has length 408 [2021-06-05 18:15:07,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:07,474 INFO L482 AbstractCegarLoop]: Abstraction has 117360 states and 314491 transitions. [2021-06-05 18:15:07,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-06-05 18:15:07,474 INFO L276 IsEmpty]: Start isEmpty. Operand 117360 states and 314491 transitions. [2021-06-05 18:15:07,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-06-05 18:15:07,621 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:07,621 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:07,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 18:15:07,822 INFO L430 AbstractCegarLoop]: === Iteration 75 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:07,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:07,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1088489623, now seen corresponding path program 36 times [2021-06-05 18:15:07,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:07,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835055698] [2021-06-05 18:15:07,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:07,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:08,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1084 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-06-05 18:15:08,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:08,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835055698] [2021-06-05 18:15:08,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835055698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:08,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120398572] [2021-06-05 18:15:08,018 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:08,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:15:08,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:08,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:15:08,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:09,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:15:09,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120398572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:09,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:09,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-06-05 18:15:09,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965794661] [2021-06-05 18:15:09,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:15:09,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:09,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:15:09,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:15:09,213 INFO L87 Difference]: Start difference. First operand 117360 states and 314491 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-06-05 18:15:09,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:09,868 INFO L93 Difference]: Finished difference Result 154525 states and 410727 transitions. [2021-06-05 18:15:09,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:15:09,873 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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 408 [2021-06-05 18:15:09,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:10,103 INFO L225 Difference]: With dead ends: 154525 [2021-06-05 18:15:10,103 INFO L226 Difference]: Without dead ends: 154525 [2021-06-05 18:15:10,104 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 237.5ms TimeCoverageRelationStatistics Valid=363, Invalid=969, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:15:10,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154525 states. [2021-06-05 18:15:12,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154525 to 120260. [2021-06-05 18:15:12,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120260 states, 120258 states have (on average 2.680620000332618) internal successors, (322366), 120259 states have internal predecessors, (322366), 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) [2021-06-05 18:15:12,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120260 states to 120260 states and 322366 transitions. [2021-06-05 18:15:12,455 INFO L78 Accepts]: Start accepts. Automaton has 120260 states and 322366 transitions. Word has length 408 [2021-06-05 18:15:12,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:12,455 INFO L482 AbstractCegarLoop]: Abstraction has 120260 states and 322366 transitions. [2021-06-05 18:15:12,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-06-05 18:15:12,455 INFO L276 IsEmpty]: Start isEmpty. Operand 120260 states and 322366 transitions. [2021-06-05 18:15:12,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-06-05 18:15:12,610 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:12,610 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:12,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:12,825 INFO L430 AbstractCegarLoop]: === Iteration 76 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:12,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:12,825 INFO L82 PathProgramCache]: Analyzing trace with hash -726256779, now seen corresponding path program 37 times [2021-06-05 18:15:12,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:12,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29629794] [2021-06-05 18:15:12,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:12,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1084 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-06-05 18:15:12,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:12,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29629794] [2021-06-05 18:15:12,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29629794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:12,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194164587] [2021-06-05 18:15:12,986 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:13,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:13,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:15:13,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:13,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:15:13,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194164587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:13,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:13,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-06-05 18:15:13,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584353013] [2021-06-05 18:15:13,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:15:13,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:13,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:15:13,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:15:13,552 INFO L87 Difference]: Start difference. First operand 120260 states and 322366 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-06-05 18:15:14,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:14,506 INFO L93 Difference]: Finished difference Result 144180 states and 382907 transitions. [2021-06-05 18:15:14,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:15:14,506 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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 408 [2021-06-05 18:15:14,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:14,717 INFO L225 Difference]: With dead ends: 144180 [2021-06-05 18:15:14,718 INFO L226 Difference]: Without dead ends: 144180 [2021-06-05 18:15:14,718 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 569.1ms TimeCoverageRelationStatistics Valid=365, Invalid=967, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:15:14,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144180 states. [2021-06-05 18:15:16,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144180 to 122420. [2021-06-05 18:15:16,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122420 states, 122418 states have (on average 2.6815827737750983) internal successors, (328274), 122419 states have internal predecessors, (328274), 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) [2021-06-05 18:15:17,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122420 states to 122420 states and 328274 transitions. [2021-06-05 18:15:17,119 INFO L78 Accepts]: Start accepts. Automaton has 122420 states and 328274 transitions. Word has length 408 [2021-06-05 18:15:17,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:17,119 INFO L482 AbstractCegarLoop]: Abstraction has 122420 states and 328274 transitions. [2021-06-05 18:15:17,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-06-05 18:15:17,119 INFO L276 IsEmpty]: Start isEmpty. Operand 122420 states and 328274 transitions. [2021-06-05 18:15:17,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-06-05 18:15:17,263 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:17,263 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:17,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:17,464 INFO L430 AbstractCegarLoop]: === Iteration 77 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:17,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:17,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1992353044, now seen corresponding path program 26 times [2021-06-05 18:15:17,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:17,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664838139] [2021-06-05 18:15:17,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:17,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:17,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:15:17,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:17,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664838139] [2021-06-05 18:15:17,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664838139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:17,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400314299] [2021-06-05 18:15:17,630 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:17,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:15:17,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:17,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:15:17,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:18,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:15:18,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400314299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:18,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:18,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:15:18,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551287265] [2021-06-05 18:15:18,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:15:18,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:18,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:15:18,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:15:18,179 INFO L87 Difference]: Start difference. First operand 122420 states and 328274 transitions. Second operand has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2021-06-05 18:15:19,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:19,256 INFO L93 Difference]: Finished difference Result 148110 states and 394281 transitions. [2021-06-05 18:15:19,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:15:19,257 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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 409 [2021-06-05 18:15:19,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:19,466 INFO L225 Difference]: With dead ends: 148110 [2021-06-05 18:15:19,466 INFO L226 Difference]: Without dead ends: 148110 [2021-06-05 18:15:19,466 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 382.0ms TimeCoverageRelationStatistics Valid=517, Invalid=1553, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:15:19,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148110 states. [2021-06-05 18:15:21,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148110 to 121340. [2021-06-05 18:15:21,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121340 states, 121338 states have (on average 2.6811056717598776) internal successors, (325320), 121339 states have internal predecessors, (325320), 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) [2021-06-05 18:15:21,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121340 states to 121340 states and 325320 transitions. [2021-06-05 18:15:21,878 INFO L78 Accepts]: Start accepts. Automaton has 121340 states and 325320 transitions. Word has length 409 [2021-06-05 18:15:21,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:21,879 INFO L482 AbstractCegarLoop]: Abstraction has 121340 states and 325320 transitions. [2021-06-05 18:15:21,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2021-06-05 18:15:21,879 INFO L276 IsEmpty]: Start isEmpty. Operand 121340 states and 325320 transitions. [2021-06-05 18:15:22,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-06-05 18:15:22,018 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:22,018 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:22,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:22,219 INFO L430 AbstractCegarLoop]: === Iteration 78 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:22,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:22,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1018310376, now seen corresponding path program 27 times [2021-06-05 18:15:22,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:22,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391054374] [2021-06-05 18:15:22,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:22,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:15:22,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:22,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391054374] [2021-06-05 18:15:22,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391054374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:22,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188398462] [2021-06-05 18:15:22,401 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:22,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:15:22,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:22,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:15:22,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:15:23,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188398462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:23,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:23,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:15:23,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133388046] [2021-06-05 18:15:23,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:15:23,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:23,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:15:23,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:15:23,174 INFO L87 Difference]: Start difference. First operand 121340 states and 325320 transitions. Second operand has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2021-06-05 18:15:24,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:24,166 INFO L93 Difference]: Finished difference Result 152100 states and 404453 transitions. [2021-06-05 18:15:24,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:15:24,166 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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 409 [2021-06-05 18:15:24,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:24,352 INFO L225 Difference]: With dead ends: 152100 [2021-06-05 18:15:24,352 INFO L226 Difference]: Without dead ends: 152100 [2021-06-05 18:15:24,356 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 294.0ms TimeCoverageRelationStatistics Valid=506, Invalid=1474, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:15:24,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152100 states. [2021-06-05 18:15:26,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152100 to 121340. [2021-06-05 18:15:26,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121340 states, 121338 states have (on average 2.6811056717598776) internal successors, (325320), 121339 states have internal predecessors, (325320), 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) [2021-06-05 18:15:26,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121340 states to 121340 states and 325320 transitions. [2021-06-05 18:15:26,791 INFO L78 Accepts]: Start accepts. Automaton has 121340 states and 325320 transitions. Word has length 409 [2021-06-05 18:15:26,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:26,791 INFO L482 AbstractCegarLoop]: Abstraction has 121340 states and 325320 transitions. [2021-06-05 18:15:26,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2021-06-05 18:15:26,791 INFO L276 IsEmpty]: Start isEmpty. Operand 121340 states and 325320 transitions. [2021-06-05 18:15:26,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-06-05 18:15:26,929 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:26,929 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:27,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 18:15:27,129 INFO L430 AbstractCegarLoop]: === Iteration 79 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:27,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:27,130 INFO L82 PathProgramCache]: Analyzing trace with hash 466205036, now seen corresponding path program 28 times [2021-06-05 18:15:27,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:27,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627195560] [2021-06-05 18:15:27,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:27,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:15:27,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:27,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627195560] [2021-06-05 18:15:27,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627195560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:27,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010147849] [2021-06-05 18:15:27,292 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:27,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:15:27,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:27,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:15:27,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:28,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:15:28,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010147849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:28,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:28,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:15:28,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883127218] [2021-06-05 18:15:28,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:15:28,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:28,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:15:28,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:15:28,348 INFO L87 Difference]: Start difference. First operand 121340 states and 325320 transitions. Second operand has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2021-06-05 18:15:29,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:29,339 INFO L93 Difference]: Finished difference Result 155890 states and 414296 transitions. [2021-06-05 18:15:29,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:15:29,339 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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 409 [2021-06-05 18:15:29,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:29,549 INFO L225 Difference]: With dead ends: 155890 [2021-06-05 18:15:29,549 INFO L226 Difference]: Without dead ends: 155890 [2021-06-05 18:15:29,549 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 288.2ms TimeCoverageRelationStatistics Valid=495, Invalid=1397, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:15:29,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155890 states. [2021-06-05 18:15:31,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155890 to 119520. [2021-06-05 18:15:31,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119520 states, 119518 states have (on average 2.680759383523821) internal successors, (320399), 119519 states have internal predecessors, (320399), 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) [2021-06-05 18:15:31,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119520 states to 119520 states and 320399 transitions. [2021-06-05 18:15:31,919 INFO L78 Accepts]: Start accepts. Automaton has 119520 states and 320399 transitions. Word has length 409 [2021-06-05 18:15:31,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:31,920 INFO L482 AbstractCegarLoop]: Abstraction has 119520 states and 320399 transitions. [2021-06-05 18:15:31,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2021-06-05 18:15:31,920 INFO L276 IsEmpty]: Start isEmpty. Operand 119520 states and 320399 transitions. [2021-06-05 18:15:32,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-06-05 18:15:32,060 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:32,060 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:32,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:32,269 INFO L430 AbstractCegarLoop]: === Iteration 80 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:32,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:32,269 INFO L82 PathProgramCache]: Analyzing trace with hash -229703576, now seen corresponding path program 29 times [2021-06-05 18:15:32,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:32,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875570398] [2021-06-05 18:15:32,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:32,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:32,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:15:32,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:32,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875570398] [2021-06-05 18:15:32,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875570398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:32,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261427485] [2021-06-05 18:15:32,433 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:32,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:15:32,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:32,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:15:32,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:33,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:15:33,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261427485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:33,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:33,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:15:33,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980709817] [2021-06-05 18:15:33,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:15:33,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:33,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:15:33,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:15:33,056 INFO L87 Difference]: Start difference. First operand 119520 states and 320399 transitions. Second operand has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2021-06-05 18:15:34,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:34,051 INFO L93 Difference]: Finished difference Result 153090 states and 406682 transitions. [2021-06-05 18:15:34,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:15:34,061 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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 409 [2021-06-05 18:15:34,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:34,256 INFO L225 Difference]: With dead ends: 153090 [2021-06-05 18:15:34,256 INFO L226 Difference]: Without dead ends: 153090 [2021-06-05 18:15:34,256 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 290.5ms TimeCoverageRelationStatistics Valid=484, Invalid=1322, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:15:34,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153090 states. [2021-06-05 18:15:35,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153090 to 122420. [2021-06-05 18:15:36,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122420 states, 122418 states have (on average 2.6815827737750983) internal successors, (328274), 122419 states have internal predecessors, (328274), 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) [2021-06-05 18:15:36,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122420 states to 122420 states and 328274 transitions. [2021-06-05 18:15:36,352 INFO L78 Accepts]: Start accepts. Automaton has 122420 states and 328274 transitions. Word has length 409 [2021-06-05 18:15:36,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:36,353 INFO L482 AbstractCegarLoop]: Abstraction has 122420 states and 328274 transitions. [2021-06-05 18:15:36,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2021-06-05 18:15:36,353 INFO L276 IsEmpty]: Start isEmpty. Operand 122420 states and 328274 transitions. [2021-06-05 18:15:36,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-06-05 18:15:36,884 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:36,884 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:37,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 18:15:37,109 INFO L430 AbstractCegarLoop]: === Iteration 81 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:37,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:37,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1565489132, now seen corresponding path program 30 times [2021-06-05 18:15:37,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:37,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750504643] [2021-06-05 18:15:37,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:37,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:37,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:15:37,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:37,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750504643] [2021-06-05 18:15:37,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750504643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:37,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785899644] [2021-06-05 18:15:37,285 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:37,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:15:37,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:37,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:15:37,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:38,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:15:38,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785899644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:38,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:38,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:15:38,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307207065] [2021-06-05 18:15:38,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:15:38,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:38,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:15:38,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:15:38,126 INFO L87 Difference]: Start difference. First operand 122420 states and 328274 transitions. Second operand has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2021-06-05 18:15:38,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:38,802 INFO L93 Difference]: Finished difference Result 151720 states and 403302 transitions. [2021-06-05 18:15:38,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:15:38,803 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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 409 [2021-06-05 18:15:38,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:39,006 INFO L225 Difference]: With dead ends: 151720 [2021-06-05 18:15:39,007 INFO L226 Difference]: Without dead ends: 151720 [2021-06-05 18:15:39,007 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 289.1ms TimeCoverageRelationStatistics Valid=473, Invalid=1249, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:15:39,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151720 states. [2021-06-05 18:15:41,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151720 to 125320. [2021-06-05 18:15:41,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125320 states, 125318 states have (on average 2.6823680556663847) internal successors, (336149), 125319 states have internal predecessors, (336149), 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) [2021-06-05 18:15:41,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125320 states to 125320 states and 336149 transitions. [2021-06-05 18:15:41,630 INFO L78 Accepts]: Start accepts. Automaton has 125320 states and 336149 transitions. Word has length 409 [2021-06-05 18:15:41,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:41,630 INFO L482 AbstractCegarLoop]: Abstraction has 125320 states and 336149 transitions. [2021-06-05 18:15:41,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2021-06-05 18:15:41,630 INFO L276 IsEmpty]: Start isEmpty. Operand 125320 states and 336149 transitions. [2021-06-05 18:15:41,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-06-05 18:15:41,807 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:41,807 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:42,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:42,025 INFO L430 AbstractCegarLoop]: === Iteration 82 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:42,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:42,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1713156584, now seen corresponding path program 31 times [2021-06-05 18:15:42,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:42,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331536715] [2021-06-05 18:15:42,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:42,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:15:42,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:42,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331536715] [2021-06-05 18:15:42,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331536715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:42,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897769454] [2021-06-05 18:15:42,193 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:42,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:15:42,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:42,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:15:42,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897769454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:42,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:42,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:15:42,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816509846] [2021-06-05 18:15:42,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:15:42,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:42,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:15:42,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:15:42,741 INFO L87 Difference]: Start difference. First operand 125320 states and 336149 transitions. Second operand has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2021-06-05 18:15:43,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:43,695 INFO L93 Difference]: Finished difference Result 150655 states and 399845 transitions. [2021-06-05 18:15:43,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:15:43,696 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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 409 [2021-06-05 18:15:43,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:43,887 INFO L225 Difference]: With dead ends: 150655 [2021-06-05 18:15:43,888 INFO L226 Difference]: Without dead ends: 150655 [2021-06-05 18:15:43,888 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 268.0ms TimeCoverageRelationStatistics Valid=462, Invalid=1178, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:15:44,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150655 states. [2021-06-05 18:15:45,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150655 to 124240. [2021-06-05 18:15:46,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124240 states, 124238 states have (on average 2.681908916756548) internal successors, (333195), 124239 states have internal predecessors, (333195), 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) [2021-06-05 18:15:46,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124240 states to 124240 states and 333195 transitions. [2021-06-05 18:15:46,291 INFO L78 Accepts]: Start accepts. Automaton has 124240 states and 333195 transitions. Word has length 409 [2021-06-05 18:15:46,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:46,292 INFO L482 AbstractCegarLoop]: Abstraction has 124240 states and 333195 transitions. [2021-06-05 18:15:46,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2021-06-05 18:15:46,292 INFO L276 IsEmpty]: Start isEmpty. Operand 124240 states and 333195 transitions. [2021-06-05 18:15:46,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-06-05 18:15:46,434 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:46,434 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:46,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:46,635 INFO L430 AbstractCegarLoop]: === Iteration 83 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:46,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:46,635 INFO L82 PathProgramCache]: Analyzing trace with hash 66606700, now seen corresponding path program 32 times [2021-06-05 18:15:46,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:46,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950250806] [2021-06-05 18:15:46,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:46,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:15:46,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:46,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950250806] [2021-06-05 18:15:46,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950250806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:46,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324573440] [2021-06-05 18:15:46,791 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:46,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:15:46,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:46,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:15:46,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:47,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:15:47,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324573440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:47,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:47,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:15:47,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358948975] [2021-06-05 18:15:47,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:15:47,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:47,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:15:47,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:15:47,340 INFO L87 Difference]: Start difference. First operand 124240 states and 333195 transitions. Second operand has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2021-06-05 18:15:48,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:48,278 INFO L93 Difference]: Finished difference Result 145070 states and 385658 transitions. [2021-06-05 18:15:48,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:15:48,279 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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 409 [2021-06-05 18:15:48,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:48,469 INFO L225 Difference]: With dead ends: 145070 [2021-06-05 18:15:48,469 INFO L226 Difference]: Without dead ends: 145070 [2021-06-05 18:15:48,470 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 252.3ms TimeCoverageRelationStatistics Valid=451, Invalid=1109, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:15:48,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145070 states. [2021-06-05 18:15:50,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145070 to 124240. [2021-06-05 18:15:50,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124240 states, 124238 states have (on average 2.681908916756548) internal successors, (333195), 124239 states have internal predecessors, (333195), 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) [2021-06-05 18:15:50,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124240 states to 124240 states and 333195 transitions. [2021-06-05 18:15:50,877 INFO L78 Accepts]: Start accepts. Automaton has 124240 states and 333195 transitions. Word has length 409 [2021-06-05 18:15:50,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:50,878 INFO L482 AbstractCegarLoop]: Abstraction has 124240 states and 333195 transitions. [2021-06-05 18:15:50,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2021-06-05 18:15:50,878 INFO L276 IsEmpty]: Start isEmpty. Operand 124240 states and 333195 transitions. [2021-06-05 18:15:51,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-06-05 18:15:51,019 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:51,019 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:51,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:51,219 INFO L430 AbstractCegarLoop]: === Iteration 84 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:51,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:51,220 INFO L82 PathProgramCache]: Analyzing trace with hash -252492952, now seen corresponding path program 33 times [2021-06-05 18:15:51,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:51,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346730423] [2021-06-05 18:15:51,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:51,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:51,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1383 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 18:15:51,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:51,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346730423] [2021-06-05 18:15:51,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346730423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:51,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273648012] [2021-06-05 18:15:51,392 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:51,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:15:51,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:51,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:15:51,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:52,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:15:52,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273648012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:52,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:52,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 22 [2021-06-05 18:15:52,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413282461] [2021-06-05 18:15:52,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:15:52,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:52,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:15:52,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:15:52,203 INFO L87 Difference]: Start difference. First operand 124240 states and 333195 transitions. Second operand has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2021-06-05 18:15:53,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:53,212 INFO L93 Difference]: Finished difference Result 138275 states and 368306 transitions. [2021-06-05 18:15:53,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:15:53,213 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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 409 [2021-06-05 18:15:53,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:53,378 INFO L225 Difference]: With dead ends: 138275 [2021-06-05 18:15:53,379 INFO L226 Difference]: Without dead ends: 138275 [2021-06-05 18:15:53,379 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 269.0ms TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:15:53,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138275 states. [2021-06-05 18:15:54,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138275 to 121000. [2021-06-05 18:15:55,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121000 states, 120998 states have (on average 2.6804823220218514) internal successors, (324333), 120999 states have internal predecessors, (324333), 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) [2021-06-05 18:15:55,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121000 states to 121000 states and 324333 transitions. [2021-06-05 18:15:55,304 INFO L78 Accepts]: Start accepts. Automaton has 121000 states and 324333 transitions. Word has length 409 [2021-06-05 18:15:55,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:55,305 INFO L482 AbstractCegarLoop]: Abstraction has 121000 states and 324333 transitions. [2021-06-05 18:15:55,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2021-06-05 18:15:55,305 INFO L276 IsEmpty]: Start isEmpty. Operand 121000 states and 324333 transitions. [2021-06-05 18:15:55,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2021-06-05 18:15:55,454 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:55,455 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:55,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:55,655 INFO L430 AbstractCegarLoop]: === Iteration 85 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:55,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:55,655 INFO L82 PathProgramCache]: Analyzing trace with hash 642031821, now seen corresponding path program 11 times [2021-06-05 18:15:55,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:55,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094548910] [2021-06-05 18:15:55,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:55,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2123 backedges. 33 proven. 2090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:15:56,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:56,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094548910] [2021-06-05 18:15:56,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094548910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:56,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781879465] [2021-06-05 18:15:56,339 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:56,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 18:15:56,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:56,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:15:56,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:57,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2123 backedges. 33 proven. 2090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:15:57,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781879465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:57,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:57,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-06-05 18:15:57,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584045790] [2021-06-05 18:15:57,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 18:15:57,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:57,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 18:15:57,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:15:57,046 INFO L87 Difference]: Start difference. First operand 121000 states and 324333 transitions. Second operand has 27 states, 27 states have (on average 18.0) internal successors, (486), 27 states have internal predecessors, (486), 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) [2021-06-05 18:15:57,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:57,782 INFO L93 Difference]: Finished difference Result 134722 states and 359461 transitions. [2021-06-05 18:15:57,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:15:57,782 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 18.0) internal successors, (486), 27 states have internal predecessors, (486), 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 439 [2021-06-05 18:15:57,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:57,965 INFO L225 Difference]: With dead ends: 134722 [2021-06-05 18:15:57,966 INFO L226 Difference]: Without dead ends: 134722 [2021-06-05 18:15:57,966 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 423.4ms TimeCoverageRelationStatistics Valid=748, Invalid=1604, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:15:58,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134722 states. [2021-06-05 18:15:59,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134722 to 126475. [2021-06-05 18:15:59,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126475 states, 126473 states have (on average 2.6800107532833093) internal successors, (338949), 126474 states have internal predecessors, (338949), 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) [2021-06-05 18:16:00,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126475 states to 126475 states and 338949 transitions. [2021-06-05 18:16:00,118 INFO L78 Accepts]: Start accepts. Automaton has 126475 states and 338949 transitions. Word has length 439 [2021-06-05 18:16:00,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:00,118 INFO L482 AbstractCegarLoop]: Abstraction has 126475 states and 338949 transitions. [2021-06-05 18:16:00,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 18.0) internal successors, (486), 27 states have internal predecessors, (486), 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) [2021-06-05 18:16:00,119 INFO L276 IsEmpty]: Start isEmpty. Operand 126475 states and 338949 transitions. [2021-06-05 18:16:00,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-06-05 18:16:00,278 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:00,278 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:00,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:00,478 INFO L430 AbstractCegarLoop]: === Iteration 86 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:00,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:00,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1575408054, now seen corresponding path program 38 times [2021-06-05 18:16:00,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:00,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831289530] [2021-06-05 18:16:00,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:00,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:00,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:16:00,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:00,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831289530] [2021-06-05 18:16:00,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831289530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:00,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030457801] [2021-06-05 18:16:00,620 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:00,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:16:00,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:00,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:16:00,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:01,296 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:16:01,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:16:01,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030457801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:01,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:01,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:16:01,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135967247] [2021-06-05 18:16:01,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:16:01,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:01,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:16:01,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:16:01,588 INFO L87 Difference]: Start difference. First operand 126475 states and 338949 transitions. Second operand has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-06-05 18:16:02,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:02,166 INFO L93 Difference]: Finished difference Result 177585 states and 471277 transitions. [2021-06-05 18:16:02,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:16:02,166 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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 442 [2021-06-05 18:16:02,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:02,389 INFO L225 Difference]: With dead ends: 177585 [2021-06-05 18:16:02,390 INFO L226 Difference]: Without dead ends: 177585 [2021-06-05 18:16:02,390 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 198.7ms TimeCoverageRelationStatistics Valid=275, Invalid=915, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:16:02,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177585 states. [2021-06-05 18:16:04,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177585 to 123315. [2021-06-05 18:16:04,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123315 states, 123313 states have (on average 2.6794498552464057) internal successors, (330411), 123314 states have internal predecessors, (330411), 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) [2021-06-05 18:16:04,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123315 states to 123315 states and 330411 transitions. [2021-06-05 18:16:04,957 INFO L78 Accepts]: Start accepts. Automaton has 123315 states and 330411 transitions. Word has length 442 [2021-06-05 18:16:04,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:04,958 INFO L482 AbstractCegarLoop]: Abstraction has 123315 states and 330411 transitions. [2021-06-05 18:16:04,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-06-05 18:16:04,958 INFO L276 IsEmpty]: Start isEmpty. Operand 123315 states and 330411 transitions. [2021-06-05 18:16:05,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-06-05 18:16:05,108 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:05,108 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:05,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:05,309 INFO L430 AbstractCegarLoop]: === Iteration 87 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:05,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:05,309 INFO L82 PathProgramCache]: Analyzing trace with hash 634815278, now seen corresponding path program 39 times [2021-06-05 18:16:05,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:05,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780247198] [2021-06-05 18:16:05,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:05,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:05,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:16:05,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:05,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780247198] [2021-06-05 18:16:05,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780247198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:05,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772630830] [2021-06-05 18:16:05,852 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:06,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:16:06,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:06,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:16:06,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:06,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:16:06,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772630830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:06,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:06,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:16:06,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024852353] [2021-06-05 18:16:06,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:16:06,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:06,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:16:06,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:16:06,714 INFO L87 Difference]: Start difference. First operand 123315 states and 330411 transitions. Second operand has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-06-05 18:16:07,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:07,320 INFO L93 Difference]: Finished difference Result 180470 states and 480926 transitions. [2021-06-05 18:16:07,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:16:07,321 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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 442 [2021-06-05 18:16:07,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:07,554 INFO L225 Difference]: With dead ends: 180470 [2021-06-05 18:16:07,554 INFO L226 Difference]: Without dead ends: 180470 [2021-06-05 18:16:07,555 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 179.2ms TimeCoverageRelationStatistics Valid=261, Invalid=861, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:16:08,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180470 states. [2021-06-05 18:16:09,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180470 to 126215. [2021-06-05 18:16:09,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126215 states, 126213 states have (on average 2.680278576691783) internal successors, (338286), 126214 states have internal predecessors, (338286), 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) [2021-06-05 18:16:10,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126215 states to 126215 states and 338286 transitions. [2021-06-05 18:16:10,106 INFO L78 Accepts]: Start accepts. Automaton has 126215 states and 338286 transitions. Word has length 442 [2021-06-05 18:16:10,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:10,107 INFO L482 AbstractCegarLoop]: Abstraction has 126215 states and 338286 transitions. [2021-06-05 18:16:10,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-06-05 18:16:10,107 INFO L276 IsEmpty]: Start isEmpty. Operand 126215 states and 338286 transitions. [2021-06-05 18:16:10,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-06-05 18:16:10,622 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:10,623 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:10,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:10,837 INFO L430 AbstractCegarLoop]: === Iteration 88 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:10,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:10,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1624160756, now seen corresponding path program 40 times [2021-06-05 18:16:10,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:10,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428863182] [2021-06-05 18:16:10,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:10,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:10,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:16:10,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:10,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428863182] [2021-06-05 18:16:10,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428863182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:10,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454013106] [2021-06-05 18:16:10,968 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:11,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:16:11,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:11,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:16:11,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:11,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:16:11,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454013106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:11,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:11,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:16:11,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672455827] [2021-06-05 18:16:11,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:16:11,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:11,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:16:11,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:16:11,869 INFO L87 Difference]: Start difference. First operand 126215 states and 338286 transitions. Second operand has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-06-05 18:16:12,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:12,454 INFO L93 Difference]: Finished difference Result 177810 states and 473410 transitions. [2021-06-05 18:16:12,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:16:12,454 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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 442 [2021-06-05 18:16:12,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:12,672 INFO L225 Difference]: With dead ends: 177810 [2021-06-05 18:16:12,672 INFO L226 Difference]: Without dead ends: 177810 [2021-06-05 18:16:12,672 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 187.4ms TimeCoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:16:13,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177810 states. [2021-06-05 18:16:14,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177810 to 129455. [2021-06-05 18:16:14,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129455 states, 129453 states have (on average 2.6816528006303444) internal successors, (347148), 129454 states have internal predecessors, (347148), 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) [2021-06-05 18:16:15,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129455 states to 129455 states and 347148 transitions. [2021-06-05 18:16:15,533 INFO L78 Accepts]: Start accepts. Automaton has 129455 states and 347148 transitions. Word has length 442 [2021-06-05 18:16:15,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:15,533 INFO L482 AbstractCegarLoop]: Abstraction has 129455 states and 347148 transitions. [2021-06-05 18:16:15,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-06-05 18:16:15,533 INFO L276 IsEmpty]: Start isEmpty. Operand 129455 states and 347148 transitions. [2021-06-05 18:16:15,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-06-05 18:16:15,694 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:15,694 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:15,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 18:16:15,895 INFO L430 AbstractCegarLoop]: === Iteration 89 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:15,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:15,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1545527662, now seen corresponding path program 41 times [2021-06-05 18:16:15,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:15,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111033756] [2021-06-05 18:16:15,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:15,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:16,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:16:16,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:16,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111033756] [2021-06-05 18:16:16,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111033756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:16,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423837869] [2021-06-05 18:16:16,037 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:16,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:16:16,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:16,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:16:16,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:16,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:16:16,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423837869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:16,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:16,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:16:16,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102607782] [2021-06-05 18:16:16,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:16:16,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:16,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:16:16,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:16:16,889 INFO L87 Difference]: Start difference. First operand 129455 states and 347148 transitions. Second operand has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-06-05 18:16:17,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:17,869 INFO L93 Difference]: Finished difference Result 170990 states and 454159 transitions. [2021-06-05 18:16:17,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:16:17,870 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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 442 [2021-06-05 18:16:17,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:18,091 INFO L225 Difference]: With dead ends: 170990 [2021-06-05 18:16:18,091 INFO L226 Difference]: Without dead ends: 170990 [2021-06-05 18:16:18,091 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 185.2ms TimeCoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:16:18,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170990 states. [2021-06-05 18:16:19,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170990 to 120495. [2021-06-05 18:16:20,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120495 states, 120493 states have (on average 2.679491754707742) internal successors, (322860), 120494 states have internal predecessors, (322860), 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) [2021-06-05 18:16:20,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120495 states to 120495 states and 322860 transitions. [2021-06-05 18:16:20,250 INFO L78 Accepts]: Start accepts. Automaton has 120495 states and 322860 transitions. Word has length 442 [2021-06-05 18:16:20,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:20,250 INFO L482 AbstractCegarLoop]: Abstraction has 120495 states and 322860 transitions. [2021-06-05 18:16:20,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-06-05 18:16:20,251 INFO L276 IsEmpty]: Start isEmpty. Operand 120495 states and 322860 transitions. [2021-06-05 18:16:20,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-06-05 18:16:20,739 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:20,739 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:20,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:20,953 INFO L430 AbstractCegarLoop]: === Iteration 90 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:20,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:20,953 INFO L82 PathProgramCache]: Analyzing trace with hash -752640330, now seen corresponding path program 42 times [2021-06-05 18:16:20,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:20,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412959991] [2021-06-05 18:16:20,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:20,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:21,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1114 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-06-05 18:16:21,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:21,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412959991] [2021-06-05 18:16:21,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412959991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:21,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091079907] [2021-06-05 18:16:21,102 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:21,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:16:21,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:21,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:16:21,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:21,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:16:21,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091079907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:21,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:21,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-06-05 18:16:21,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221068849] [2021-06-05 18:16:21,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:16:21,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:21,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:16:21,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:16:21,882 INFO L87 Difference]: Start difference. First operand 120495 states and 322860 transitions. Second operand has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-06-05 18:16:22,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:22,531 INFO L93 Difference]: Finished difference Result 170120 states and 452612 transitions. [2021-06-05 18:16:22,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:16:22,531 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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 442 [2021-06-05 18:16:22,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:23,080 INFO L225 Difference]: With dead ends: 170120 [2021-06-05 18:16:23,080 INFO L226 Difference]: Without dead ends: 170120 [2021-06-05 18:16:23,080 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 231.1ms TimeCoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:16:23,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170120 states. [2021-06-05 18:16:24,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170120 to 119415. [2021-06-05 18:16:24,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119415 states, 119413 states have (on average 2.6789880498773164) internal successors, (319906), 119414 states have internal predecessors, (319906), 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) [2021-06-05 18:16:25,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119415 states to 119415 states and 319906 transitions. [2021-06-05 18:16:25,124 INFO L78 Accepts]: Start accepts. Automaton has 119415 states and 319906 transitions. Word has length 442 [2021-06-05 18:16:25,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:25,124 INFO L482 AbstractCegarLoop]: Abstraction has 119415 states and 319906 transitions. [2021-06-05 18:16:25,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-06-05 18:16:25,125 INFO L276 IsEmpty]: Start isEmpty. Operand 119415 states and 319906 transitions. [2021-06-05 18:16:25,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-06-05 18:16:25,648 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:25,649 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:25,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 18:16:25,867 INFO L430 AbstractCegarLoop]: === Iteration 91 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:25,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:25,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1283350932, now seen corresponding path program 43 times [2021-06-05 18:16:25,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:25,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010090239] [2021-06-05 18:16:25,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:25,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:26,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1114 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-06-05 18:16:26,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:26,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010090239] [2021-06-05 18:16:26,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010090239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:26,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727875727] [2021-06-05 18:16:26,012 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:26,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:26,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:16:26,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:26,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:16:26,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727875727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:26,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:26,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-06-05 18:16:26,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906879278] [2021-06-05 18:16:26,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:16:26,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:26,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:16:26,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:16:26,581 INFO L87 Difference]: Start difference. First operand 119415 states and 319906 transitions. Second operand has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-06-05 18:16:27,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:27,265 INFO L93 Difference]: Finished difference Result 189795 states and 505902 transitions. [2021-06-05 18:16:27,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:16:27,266 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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 442 [2021-06-05 18:16:27,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:27,881 INFO L225 Difference]: With dead ends: 189795 [2021-06-05 18:16:27,881 INFO L226 Difference]: Without dead ends: 189795 [2021-06-05 18:16:27,882 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 202.6ms TimeCoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:16:28,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189795 states. [2021-06-05 18:16:29,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189795 to 120495. [2021-06-05 18:16:29,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120495 states, 120493 states have (on average 2.679491754707742) internal successors, (322860), 120494 states have internal predecessors, (322860), 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) [2021-06-05 18:16:30,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120495 states to 120495 states and 322860 transitions. [2021-06-05 18:16:30,460 INFO L78 Accepts]: Start accepts. Automaton has 120495 states and 322860 transitions. Word has length 442 [2021-06-05 18:16:30,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:30,461 INFO L482 AbstractCegarLoop]: Abstraction has 120495 states and 322860 transitions. [2021-06-05 18:16:30,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-06-05 18:16:30,461 INFO L276 IsEmpty]: Start isEmpty. Operand 120495 states and 322860 transitions. [2021-06-05 18:16:30,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-06-05 18:16:30,597 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:30,597 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:30,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:30,798 INFO L430 AbstractCegarLoop]: === Iteration 92 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:30,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:30,798 INFO L82 PathProgramCache]: Analyzing trace with hash 158072054, now seen corresponding path program 44 times [2021-06-05 18:16:30,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:30,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694615085] [2021-06-05 18:16:30,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:30,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1114 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-06-05 18:16:30,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:30,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694615085] [2021-06-05 18:16:30,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694615085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:30,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466829690] [2021-06-05 18:16:30,944 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:31,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:16:31,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:31,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:16:31,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:16:31,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466829690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:31,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:31,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-06-05 18:16:31,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524653230] [2021-06-05 18:16:31,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:16:31,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:31,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:16:31,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:16:31,534 INFO L87 Difference]: Start difference. First operand 120495 states and 322860 transitions. Second operand has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-06-05 18:16:32,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:32,482 INFO L93 Difference]: Finished difference Result 163890 states and 435629 transitions. [2021-06-05 18:16:32,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:16:32,483 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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 442 [2021-06-05 18:16:32,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:32,657 INFO L225 Difference]: With dead ends: 163890 [2021-06-05 18:16:32,657 INFO L226 Difference]: Without dead ends: 163890 [2021-06-05 18:16:32,658 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 205.8ms TimeCoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:16:32,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163890 states. [2021-06-05 18:16:34,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163890 to 125475. [2021-06-05 18:16:34,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125475 states, 125473 states have (on average 2.680409331091151) internal successors, (336319), 125474 states have internal predecessors, (336319), 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) [2021-06-05 18:16:35,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125475 states to 125475 states and 336319 transitions. [2021-06-05 18:16:35,227 INFO L78 Accepts]: Start accepts. Automaton has 125475 states and 336319 transitions. Word has length 442 [2021-06-05 18:16:35,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:35,227 INFO L482 AbstractCegarLoop]: Abstraction has 125475 states and 336319 transitions. [2021-06-05 18:16:35,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-06-05 18:16:35,228 INFO L276 IsEmpty]: Start isEmpty. Operand 125475 states and 336319 transitions. [2021-06-05 18:16:35,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-06-05 18:16:35,390 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:35,391 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:35,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:35,605 INFO L430 AbstractCegarLoop]: === Iteration 93 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:35,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:35,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1133559306, now seen corresponding path program 45 times [2021-06-05 18:16:35,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:35,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928417475] [2021-06-05 18:16:35,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:35,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1114 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-06-05 18:16:35,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:35,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928417475] [2021-06-05 18:16:35,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928417475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:35,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505104549] [2021-06-05 18:16:35,844 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:36,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:16:36,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:36,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:16:36,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:36,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:16:36,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505104549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:36,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:36,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-06-05 18:16:36,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388621416] [2021-06-05 18:16:36,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:16:36,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:36,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:16:36,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:16:36,657 INFO L87 Difference]: Start difference. First operand 125475 states and 336319 transitions. Second operand has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-06-05 18:16:37,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:37,357 INFO L93 Difference]: Finished difference Result 171200 states and 455265 transitions. [2021-06-05 18:16:37,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:16:37,358 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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 442 [2021-06-05 18:16:37,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:37,587 INFO L225 Difference]: With dead ends: 171200 [2021-06-05 18:16:37,587 INFO L226 Difference]: Without dead ends: 171200 [2021-06-05 18:16:37,587 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 263.0ms TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:16:38,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171200 states. [2021-06-05 18:16:39,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171200 to 127635. [2021-06-05 18:16:39,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127635 states, 127633 states have (on average 2.68133633151301) internal successors, (342227), 127634 states have internal predecessors, (342227), 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) [2021-06-05 18:16:40,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127635 states to 127635 states and 342227 transitions. [2021-06-05 18:16:40,487 INFO L78 Accepts]: Start accepts. Automaton has 127635 states and 342227 transitions. Word has length 442 [2021-06-05 18:16:40,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:40,488 INFO L482 AbstractCegarLoop]: Abstraction has 127635 states and 342227 transitions. [2021-06-05 18:16:40,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-06-05 18:16:40,488 INFO L276 IsEmpty]: Start isEmpty. Operand 127635 states and 342227 transitions. [2021-06-05 18:16:40,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-06-05 18:16:40,661 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:40,661 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:40,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:40,862 INFO L430 AbstractCegarLoop]: === Iteration 94 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:40,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:40,862 INFO L82 PathProgramCache]: Analyzing trace with hash 2036129112, now seen corresponding path program 46 times [2021-06-05 18:16:40,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:40,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515181687] [2021-06-05 18:16:40,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:40,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:41,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1114 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-06-05 18:16:41,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:41,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515181687] [2021-06-05 18:16:41,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515181687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:41,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935013413] [2021-06-05 18:16:41,010 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:41,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:16:41,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:41,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:16:41,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:41,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:16:41,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935013413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:41,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:41,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-06-05 18:16:41,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713755028] [2021-06-05 18:16:41,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:16:41,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:41,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:16:41,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:16:41,945 INFO L87 Difference]: Start difference. First operand 127635 states and 342227 transitions. Second operand has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-06-05 18:16:42,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:42,959 INFO L93 Difference]: Finished difference Result 177035 states and 471099 transitions. [2021-06-05 18:16:42,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:16:42,959 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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 442 [2021-06-05 18:16:42,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:43,176 INFO L225 Difference]: With dead ends: 177035 [2021-06-05 18:16:43,176 INFO L226 Difference]: Without dead ends: 177035 [2021-06-05 18:16:43,176 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 204.7ms TimeCoverageRelationStatistics Valid=314, Invalid=946, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:16:43,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177035 states. [2021-06-05 18:16:44,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177035 to 127635. [2021-06-05 18:16:45,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127635 states, 127633 states have (on average 2.68133633151301) internal successors, (342227), 127634 states have internal predecessors, (342227), 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) [2021-06-05 18:16:45,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127635 states to 127635 states and 342227 transitions. [2021-06-05 18:16:45,688 INFO L78 Accepts]: Start accepts. Automaton has 127635 states and 342227 transitions. Word has length 442 [2021-06-05 18:16:45,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:45,688 INFO L482 AbstractCegarLoop]: Abstraction has 127635 states and 342227 transitions. [2021-06-05 18:16:45,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-06-05 18:16:45,688 INFO L276 IsEmpty]: Start isEmpty. Operand 127635 states and 342227 transitions. [2021-06-05 18:16:45,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-06-05 18:16:45,859 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:45,859 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:46,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:46,060 INFO L430 AbstractCegarLoop]: === Iteration 95 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:46,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:46,060 INFO L82 PathProgramCache]: Analyzing trace with hash 883226294, now seen corresponding path program 47 times [2021-06-05 18:16:46,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:46,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592780788] [2021-06-05 18:16:46,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:46,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:46,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1114 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-06-05 18:16:46,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:46,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592780788] [2021-06-05 18:16:46,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592780788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:46,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906936749] [2021-06-05 18:16:46,208 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:46,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:16:46,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:46,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:16:46,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:46,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:16:46,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906936749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:46,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:46,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-06-05 18:16:46,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639031774] [2021-06-05 18:16:46,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:16:46,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:46,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:16:46,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:16:46,898 INFO L87 Difference]: Start difference. First operand 127635 states and 342227 transitions. Second operand has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-06-05 18:16:47,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:47,904 INFO L93 Difference]: Finished difference Result 171770 states and 456242 transitions. [2021-06-05 18:16:47,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:16:47,904 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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 442 [2021-06-05 18:16:47,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:48,120 INFO L225 Difference]: With dead ends: 171770 [2021-06-05 18:16:48,120 INFO L226 Difference]: Without dead ends: 171770 [2021-06-05 18:16:48,120 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 205.5ms TimeCoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:16:48,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171770 states. [2021-06-05 18:16:50,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171770 to 143255. [2021-06-05 18:16:50,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143255 states, 143253 states have (on average 2.6846069541301056) internal successors, (384578), 143254 states have internal predecessors, (384578), 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) [2021-06-05 18:16:50,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143255 states to 143255 states and 384578 transitions. [2021-06-05 18:16:50,844 INFO L78 Accepts]: Start accepts. Automaton has 143255 states and 384578 transitions. Word has length 442 [2021-06-05 18:16:50,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:50,844 INFO L482 AbstractCegarLoop]: Abstraction has 143255 states and 384578 transitions. [2021-06-05 18:16:50,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-06-05 18:16:50,845 INFO L276 IsEmpty]: Start isEmpty. Operand 143255 states and 384578 transitions. [2021-06-05 18:16:51,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-06-05 18:16:51,014 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:51,014 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:51,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-05 18:16:51,215 INFO L430 AbstractCegarLoop]: === Iteration 96 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:51,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:51,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1480402003, now seen corresponding path program 48 times [2021-06-05 18:16:51,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:51,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832592886] [2021-06-05 18:16:51,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:51,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:51,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:16:51,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:51,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832592886] [2021-06-05 18:16:51,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832592886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:51,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035922214] [2021-06-05 18:16:51,390 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:51,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:16:51,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:51,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:16:51,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:52,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:16:52,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035922214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:52,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:52,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:16:52,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059293684] [2021-06-05 18:16:52,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:16:52,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:52,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:16:52,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:16:52,318 INFO L87 Difference]: Start difference. First operand 143255 states and 384578 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:16:53,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:53,377 INFO L93 Difference]: Finished difference Result 181095 states and 482560 transitions. [2021-06-05 18:16:53,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:16:53,377 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-06-05 18:16:53,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:53,615 INFO L225 Difference]: With dead ends: 181095 [2021-06-05 18:16:53,615 INFO L226 Difference]: Without dead ends: 181095 [2021-06-05 18:16:53,615 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 284.7ms TimeCoverageRelationStatistics Valid=433, Invalid=1373, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:16:53,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181095 states. [2021-06-05 18:16:55,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181095 to 141435. [2021-06-05 18:16:55,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141435 states, 141433 states have (on average 2.6843593786457194) internal successors, (379657), 141434 states have internal predecessors, (379657), 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) [2021-06-05 18:16:56,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141435 states to 141435 states and 379657 transitions. [2021-06-05 18:16:56,264 INFO L78 Accepts]: Start accepts. Automaton has 141435 states and 379657 transitions. Word has length 443 [2021-06-05 18:16:56,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:56,265 INFO L482 AbstractCegarLoop]: Abstraction has 141435 states and 379657 transitions. [2021-06-05 18:16:56,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:16:56,265 INFO L276 IsEmpty]: Start isEmpty. Operand 141435 states and 379657 transitions. [2021-06-05 18:16:56,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-06-05 18:16:56,437 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:56,438 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:56,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:56,638 INFO L430 AbstractCegarLoop]: === Iteration 97 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:56,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:56,638 INFO L82 PathProgramCache]: Analyzing trace with hash 2057512229, now seen corresponding path program 49 times [2021-06-05 18:16:56,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:56,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397096361] [2021-06-05 18:16:56,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:56,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:16:56,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:56,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397096361] [2021-06-05 18:16:56,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397096361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:56,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178958857] [2021-06-05 18:16:56,795 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:56,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:56,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:16:56,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:57,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:16:57,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178958857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:57,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:57,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:16:57,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758274973] [2021-06-05 18:16:57,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:16:57,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:57,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:16:57,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:16:57,778 INFO L87 Difference]: Start difference. First operand 141435 states and 379657 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:16:58,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:58,608 INFO L93 Difference]: Finished difference Result 215205 states and 575027 transitions. [2021-06-05 18:16:58,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:16:58,609 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-06-05 18:16:58,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:58,941 INFO L225 Difference]: With dead ends: 215205 [2021-06-05 18:16:58,941 INFO L226 Difference]: Without dead ends: 215205 [2021-06-05 18:16:58,941 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 263.0ms TimeCoverageRelationStatistics Valid=420, Invalid=1302, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:16:59,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215205 states. [2021-06-05 18:17:01,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215205 to 141435. [2021-06-05 18:17:01,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141435 states, 141433 states have (on average 2.6843593786457194) internal successors, (379657), 141434 states have internal predecessors, (379657), 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) [2021-06-05 18:17:02,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141435 states to 141435 states and 379657 transitions. [2021-06-05 18:17:02,189 INFO L78 Accepts]: Start accepts. Automaton has 141435 states and 379657 transitions. Word has length 443 [2021-06-05 18:17:02,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:02,189 INFO L482 AbstractCegarLoop]: Abstraction has 141435 states and 379657 transitions. [2021-06-05 18:17:02,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:17:02,189 INFO L276 IsEmpty]: Start isEmpty. Operand 141435 states and 379657 transitions. [2021-06-05 18:17:02,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-06-05 18:17:02,354 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:02,355 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:02,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 18:17:02,555 INFO L430 AbstractCegarLoop]: === Iteration 98 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:02,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:02,556 INFO L82 PathProgramCache]: Analyzing trace with hash 932233351, now seen corresponding path program 50 times [2021-06-05 18:17:02,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:02,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779652828] [2021-06-05 18:17:02,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:02,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:17:02,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:02,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779652828] [2021-06-05 18:17:02,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779652828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:02,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715632335] [2021-06-05 18:17:02,711 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:02,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:17:02,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:02,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:02,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:03,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:17:03,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715632335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:03,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:03,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:17:03,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730173419] [2021-06-05 18:17:03,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:17:03,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:03,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:17:03,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:17:03,277 INFO L87 Difference]: Start difference. First operand 141435 states and 379657 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:17:04,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:04,304 INFO L93 Difference]: Finished difference Result 180350 states and 480244 transitions. [2021-06-05 18:17:04,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:17:04,304 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-06-05 18:17:04,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:04,523 INFO L225 Difference]: With dead ends: 180350 [2021-06-05 18:17:04,523 INFO L226 Difference]: Without dead ends: 180350 [2021-06-05 18:17:04,523 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 262.1ms TimeCoverageRelationStatistics Valid=422, Invalid=1300, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:17:04,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180350 states. [2021-06-05 18:17:06,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180350 to 138535. [2021-06-05 18:17:06,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138535 states, 138533 states have (on average 2.683707131152866) internal successors, (371782), 138534 states have internal predecessors, (371782), 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) [2021-06-05 18:17:07,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138535 states to 138535 states and 371782 transitions. [2021-06-05 18:17:07,102 INFO L78 Accepts]: Start accepts. Automaton has 138535 states and 371782 transitions. Word has length 443 [2021-06-05 18:17:07,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:07,103 INFO L482 AbstractCegarLoop]: Abstraction has 138535 states and 371782 transitions. [2021-06-05 18:17:07,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:17:07,103 INFO L276 IsEmpty]: Start isEmpty. Operand 138535 states and 371782 transitions. [2021-06-05 18:17:07,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-06-05 18:17:07,278 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:07,279 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:07,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:07,479 INFO L430 AbstractCegarLoop]: === Iteration 99 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:07,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:07,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1081649325, now seen corresponding path program 51 times [2021-06-05 18:17:07,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:07,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600068434] [2021-06-05 18:17:07,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:07,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:07,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:17:07,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:07,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600068434] [2021-06-05 18:17:07,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600068434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:07,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502205526] [2021-06-05 18:17:07,641 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:08,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:17:08,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:08,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:08,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:08,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:17:08,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502205526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:08,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:08,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:17:08,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767809650] [2021-06-05 18:17:08,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:17:08,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:08,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:17:08,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:17:08,963 INFO L87 Difference]: Start difference. First operand 138535 states and 371782 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:17:09,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:09,812 INFO L93 Difference]: Finished difference Result 214110 states and 571753 transitions. [2021-06-05 18:17:09,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:17:09,812 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-06-05 18:17:09,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:10,131 INFO L225 Difference]: With dead ends: 214110 [2021-06-05 18:17:10,132 INFO L226 Difference]: Without dead ends: 214110 [2021-06-05 18:17:10,132 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 272.8ms TimeCoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:17:10,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214110 states. [2021-06-05 18:17:12,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214110 to 138535. [2021-06-05 18:17:12,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138535 states, 138533 states have (on average 2.683707131152866) internal successors, (371782), 138534 states have internal predecessors, (371782), 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) [2021-06-05 18:17:13,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138535 states to 138535 states and 371782 transitions. [2021-06-05 18:17:13,280 INFO L78 Accepts]: Start accepts. Automaton has 138535 states and 371782 transitions. Word has length 443 [2021-06-05 18:17:13,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:13,280 INFO L482 AbstractCegarLoop]: Abstraction has 138535 states and 371782 transitions. [2021-06-05 18:17:13,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:17:13,280 INFO L276 IsEmpty]: Start isEmpty. Operand 138535 states and 371782 transitions. [2021-06-05 18:17:13,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-06-05 18:17:13,476 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:13,477 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:13,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:13,677 INFO L430 AbstractCegarLoop]: === Iteration 100 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:13,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:13,678 INFO L82 PathProgramCache]: Analyzing trace with hash -43629553, now seen corresponding path program 52 times [2021-06-05 18:17:13,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:13,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300643967] [2021-06-05 18:17:13,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:13,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:13,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:17:13,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:13,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300643967] [2021-06-05 18:17:13,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300643967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:13,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899326930] [2021-06-05 18:17:13,838 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:14,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:17:14,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:14,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:14,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:17:14,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899326930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:14,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:14,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:17:14,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004247067] [2021-06-05 18:17:14,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:17:14,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:14,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:17:14,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:17:14,970 INFO L87 Difference]: Start difference. First operand 138535 states and 371782 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:17:16,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:16,221 INFO L93 Difference]: Finished difference Result 226060 states and 604582 transitions. [2021-06-05 18:17:16,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:17:16,222 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-06-05 18:17:16,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:16,543 INFO L225 Difference]: With dead ends: 226060 [2021-06-05 18:17:16,543 INFO L226 Difference]: Without dead ends: 226060 [2021-06-05 18:17:16,544 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 266.7ms TimeCoverageRelationStatistics Valid=409, Invalid=1231, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:17:16,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226060 states. [2021-06-05 18:17:18,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226060 to 137455. [2021-06-05 18:17:19,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137455 states, 137453 states have (on average 2.683302656180658) internal successors, (368828), 137454 states have internal predecessors, (368828), 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) [2021-06-05 18:17:19,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137455 states to 137455 states and 368828 transitions. [2021-06-05 18:17:19,361 INFO L78 Accepts]: Start accepts. Automaton has 137455 states and 368828 transitions. Word has length 443 [2021-06-05 18:17:19,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:19,361 INFO L482 AbstractCegarLoop]: Abstraction has 137455 states and 368828 transitions. [2021-06-05 18:17:19,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:17:19,361 INFO L276 IsEmpty]: Start isEmpty. Operand 137455 states and 368828 transitions. [2021-06-05 18:17:19,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-06-05 18:17:19,532 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:19,532 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:19,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 18:17:19,737 INFO L430 AbstractCegarLoop]: === Iteration 101 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:19,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:19,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1196532371, now seen corresponding path program 53 times [2021-06-05 18:17:19,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:19,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907210005] [2021-06-05 18:17:19,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:19,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:17:19,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:19,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907210005] [2021-06-05 18:17:19,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907210005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:19,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039915208] [2021-06-05 18:17:19,907 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:20,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:17:20,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:20,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:20,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:20,676 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:17:21,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:17:21,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039915208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:21,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:21,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:17:21,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839952450] [2021-06-05 18:17:21,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:17:21,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:21,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:17:21,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:17:21,032 INFO L87 Difference]: Start difference. First operand 137455 states and 368828 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:17:21,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:21,695 INFO L93 Difference]: Finished difference Result 174995 states and 465521 transitions. [2021-06-05 18:17:21,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:17:21,695 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-06-05 18:17:21,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:21,922 INFO L225 Difference]: With dead ends: 174995 [2021-06-05 18:17:21,922 INFO L226 Difference]: Without dead ends: 174995 [2021-06-05 18:17:21,923 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 265.9ms TimeCoverageRelationStatistics Valid=411, Invalid=1229, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:17:22,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174995 states. [2021-06-05 18:17:24,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174995 to 137715. [2021-06-05 18:17:24,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137715 states, 137713 states have (on average 2.683050982841126) internal successors, (369491), 137714 states have internal predecessors, (369491), 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) [2021-06-05 18:17:24,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137715 states to 137715 states and 369491 transitions. [2021-06-05 18:17:24,425 INFO L78 Accepts]: Start accepts. Automaton has 137715 states and 369491 transitions. Word has length 443 [2021-06-05 18:17:24,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:24,425 INFO L482 AbstractCegarLoop]: Abstraction has 137715 states and 369491 transitions. [2021-06-05 18:17:24,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:17:24,425 INFO L276 IsEmpty]: Start isEmpty. Operand 137715 states and 369491 transitions. [2021-06-05 18:17:24,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-06-05 18:17:24,596 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:24,596 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:24,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 18:17:24,796 INFO L430 AbstractCegarLoop]: === Iteration 102 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:24,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:24,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1576155173, now seen corresponding path program 54 times [2021-06-05 18:17:24,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:24,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981616971] [2021-06-05 18:17:24,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:24,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:17:25,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:25,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981616971] [2021-06-05 18:17:25,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981616971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:25,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623578559] [2021-06-05 18:17:25,431 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:25,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:17:25,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:25,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:25,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:26,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:17:26,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623578559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:26,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:26,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:17:26,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371227526] [2021-06-05 18:17:26,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:17:26,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:26,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:17:26,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:17:26,405 INFO L87 Difference]: Start difference. First operand 137715 states and 369491 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:17:27,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:27,236 INFO L93 Difference]: Finished difference Result 210545 states and 561473 transitions. [2021-06-05 18:17:27,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:17:27,237 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-06-05 18:17:27,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:27,930 INFO L225 Difference]: With dead ends: 210545 [2021-06-05 18:17:27,930 INFO L226 Difference]: Without dead ends: 210545 [2021-06-05 18:17:27,930 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 286.7ms TimeCoverageRelationStatistics Valid=418, Invalid=1304, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:17:28,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210545 states. [2021-06-05 18:17:30,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210545 to 138795. [2021-06-05 18:17:30,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138795 states, 138793 states have (on average 2.6834566584770125) internal successors, (372445), 138794 states have internal predecessors, (372445), 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) [2021-06-05 18:17:30,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138795 states to 138795 states and 372445 transitions. [2021-06-05 18:17:30,630 INFO L78 Accepts]: Start accepts. Automaton has 138795 states and 372445 transitions. Word has length 443 [2021-06-05 18:17:30,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:30,630 INFO L482 AbstractCegarLoop]: Abstraction has 138795 states and 372445 transitions. [2021-06-05 18:17:30,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:17:30,630 INFO L276 IsEmpty]: Start isEmpty. Operand 138795 states and 372445 transitions. [2021-06-05 18:17:30,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-06-05 18:17:30,805 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:30,805 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:31,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:31,006 INFO L430 AbstractCegarLoop]: === Iteration 103 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:31,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:31,007 INFO L82 PathProgramCache]: Analyzing trace with hash 450876295, now seen corresponding path program 55 times [2021-06-05 18:17:31,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:31,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41946822] [2021-06-05 18:17:31,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:31,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:31,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:17:31,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:31,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41946822] [2021-06-05 18:17:31,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41946822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:31,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314917931] [2021-06-05 18:17:31,163 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:31,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:31,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:31,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:17:32,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314917931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:32,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:32,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:17:32,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734702056] [2021-06-05 18:17:32,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:17:32,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:32,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:17:32,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:17:32,193 INFO L87 Difference]: Start difference. First operand 138795 states and 372445 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:17:33,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:33,008 INFO L93 Difference]: Finished difference Result 226775 states and 605776 transitions. [2021-06-05 18:17:33,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:17:33,009 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-06-05 18:17:33,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:33,321 INFO L225 Difference]: With dead ends: 226775 [2021-06-05 18:17:33,321 INFO L226 Difference]: Without dead ends: 226775 [2021-06-05 18:17:33,321 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 256.0ms TimeCoverageRelationStatistics Valid=408, Invalid=1232, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:17:34,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226775 states. [2021-06-05 18:17:36,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226775 to 136635. [2021-06-05 18:17:36,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136635 states, 136633 states have (on average 2.6826388939714416) internal successors, (366537), 136634 states have internal predecessors, (366537), 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) [2021-06-05 18:17:36,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136635 states to 136635 states and 366537 transitions. [2021-06-05 18:17:36,615 INFO L78 Accepts]: Start accepts. Automaton has 136635 states and 366537 transitions. Word has length 443 [2021-06-05 18:17:36,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:36,616 INFO L482 AbstractCegarLoop]: Abstraction has 136635 states and 366537 transitions. [2021-06-05 18:17:36,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:17:36,616 INFO L276 IsEmpty]: Start isEmpty. Operand 136635 states and 366537 transitions. [2021-06-05 18:17:36,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-06-05 18:17:36,780 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:36,780 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:36,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 18:17:36,981 INFO L430 AbstractCegarLoop]: === Iteration 104 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:36,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:36,981 INFO L82 PathProgramCache]: Analyzing trace with hash -702026523, now seen corresponding path program 56 times [2021-06-05 18:17:36,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:36,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945150919] [2021-06-05 18:17:36,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:37,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:17:37,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:37,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945150919] [2021-06-05 18:17:37,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945150919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:37,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612501598] [2021-06-05 18:17:37,152 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:37,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:17:37,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:37,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:37,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:37,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:17:37,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612501598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:37,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:37,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:17:37,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319924008] [2021-06-05 18:17:37,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:17:37,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:37,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:17:37,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:17:37,735 INFO L87 Difference]: Start difference. First operand 136635 states and 366537 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:17:38,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:38,926 INFO L93 Difference]: Finished difference Result 227105 states and 606454 transitions. [2021-06-05 18:17:38,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:17:38,926 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-06-05 18:17:38,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:39,271 INFO L225 Difference]: With dead ends: 227105 [2021-06-05 18:17:39,271 INFO L226 Difference]: Without dead ends: 227105 [2021-06-05 18:17:39,271 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 263.9ms TimeCoverageRelationStatistics Valid=398, Invalid=1162, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:17:39,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227105 states. [2021-06-05 18:17:41,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227105 to 142095. [2021-06-05 18:17:41,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142095 states, 142093 states have (on average 2.6834537943459567) internal successors, (381300), 142094 states have internal predecessors, (381300), 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) [2021-06-05 18:17:42,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142095 states to 142095 states and 381300 transitions. [2021-06-05 18:17:42,149 INFO L78 Accepts]: Start accepts. Automaton has 142095 states and 381300 transitions. Word has length 443 [2021-06-05 18:17:42,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:42,149 INFO L482 AbstractCegarLoop]: Abstraction has 142095 states and 381300 transitions. [2021-06-05 18:17:42,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:17:42,149 INFO L276 IsEmpty]: Start isEmpty. Operand 142095 states and 381300 transitions. [2021-06-05 18:17:42,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-06-05 18:17:42,321 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:42,321 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forcibly destroying the process [2021-06-05 18:17:42,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 18:17:42,766 INFO L430 AbstractCegarLoop]: === Iteration 105 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:42,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:42,767 INFO L82 PathProgramCache]: Analyzing trace with hash -241703225, now seen corresponding path program 57 times [2021-06-05 18:17:42,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:42,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089409250] [2021-06-05 18:17:42,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:17:42,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:42,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089409250] [2021-06-05 18:17:42,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089409250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:42,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242573482] [2021-06-05 18:17:42,951 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:43,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:17:43,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:43,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:43,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:17:43,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242573482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:43,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:43,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:17:43,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180923166] [2021-06-05 18:17:43,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:17:43,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:43,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:17:43,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:17:43,815 INFO L87 Difference]: Start difference. First operand 142095 states and 381300 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:17:44,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:44,514 INFO L93 Difference]: Finished difference Result 175900 states and 466844 transitions. [2021-06-05 18:17:44,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:17:44,514 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-06-05 18:17:44,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:44,744 INFO L225 Difference]: With dead ends: 175900 [2021-06-05 18:17:44,744 INFO L226 Difference]: Without dead ends: 175900 [2021-06-05 18:17:44,744 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 259.5ms TimeCoverageRelationStatistics Valid=400, Invalid=1160, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:17:45,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175900 states. [2021-06-05 18:17:47,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175900 to 147415. [2021-06-05 18:17:47,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147415 states, 147413 states have (on average 2.684607192038694) internal successors, (395746), 147414 states have internal predecessors, (395746), 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) [2021-06-05 18:17:47,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147415 states to 147415 states and 395746 transitions. [2021-06-05 18:17:47,823 INFO L78 Accepts]: Start accepts. Automaton has 147415 states and 395746 transitions. Word has length 443 [2021-06-05 18:17:47,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:47,823 INFO L482 AbstractCegarLoop]: Abstraction has 147415 states and 395746 transitions. [2021-06-05 18:17:47,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:17:47,823 INFO L276 IsEmpty]: Start isEmpty. Operand 147415 states and 395746 transitions. [2021-06-05 18:17:48,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-06-05 18:17:48,003 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:48,003 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:48,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 18:17:48,203 INFO L430 AbstractCegarLoop]: === Iteration 106 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:48,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:48,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1812417107, now seen corresponding path program 58 times [2021-06-05 18:17:48,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:48,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932382934] [2021-06-05 18:17:48,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:48,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:48,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:17:48,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:48,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932382934] [2021-06-05 18:17:48,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932382934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:48,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225124712] [2021-06-05 18:17:48,358 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:48,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:17:48,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:48,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:48,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:49,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:17:49,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225124712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:49,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:49,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:17:49,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559749619] [2021-06-05 18:17:49,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:17:49,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:49,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:17:49,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:17:49,336 INFO L87 Difference]: Start difference. First operand 147415 states and 395746 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:17:50,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:50,496 INFO L93 Difference]: Finished difference Result 201235 states and 536688 transitions. [2021-06-05 18:17:50,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:17:50,496 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-06-05 18:17:50,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:50,789 INFO L225 Difference]: With dead ends: 201235 [2021-06-05 18:17:50,789 INFO L226 Difference]: Without dead ends: 201235 [2021-06-05 18:17:50,789 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 264.6ms TimeCoverageRelationStatistics Valid=417, Invalid=1305, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:17:51,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201235 states. [2021-06-05 18:17:53,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201235 to 149575. [2021-06-05 18:17:53,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149575 states, 149573 states have (on average 2.685337594351922) internal successors, (401654), 149574 states have internal predecessors, (401654), 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) [2021-06-05 18:17:53,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149575 states to 149575 states and 401654 transitions. [2021-06-05 18:17:53,495 INFO L78 Accepts]: Start accepts. Automaton has 149575 states and 401654 transitions. Word has length 443 [2021-06-05 18:17:53,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:53,496 INFO L482 AbstractCegarLoop]: Abstraction has 149575 states and 401654 transitions. [2021-06-05 18:17:53,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:17:53,496 INFO L276 IsEmpty]: Start isEmpty. Operand 149575 states and 401654 transitions. [2021-06-05 18:17:53,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-06-05 18:17:53,679 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:53,679 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:53,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:53,881 INFO L430 AbstractCegarLoop]: === Iteration 107 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:53,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:53,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1357271311, now seen corresponding path program 59 times [2021-06-05 18:17:53,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:53,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548320426] [2021-06-05 18:17:53,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:53,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:54,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:17:54,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:54,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548320426] [2021-06-05 18:17:54,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548320426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:54,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893364947] [2021-06-05 18:17:54,477 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:55,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:17:55,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:55,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:55,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:55,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:17:55,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893364947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:55,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:55,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:17:55,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339243834] [2021-06-05 18:17:55,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:17:55,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:55,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:17:55,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:17:55,438 INFO L87 Difference]: Start difference. First operand 149575 states and 401654 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:17:56,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:56,245 INFO L93 Difference]: Finished difference Result 213830 states and 570872 transitions. [2021-06-05 18:17:56,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:17:56,246 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-06-05 18:17:56,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:56,572 INFO L225 Difference]: With dead ends: 213830 [2021-06-05 18:17:56,572 INFO L226 Difference]: Without dead ends: 213830 [2021-06-05 18:17:56,572 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 258.6ms TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:17:57,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213830 states. [2021-06-05 18:17:59,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213830 to 148495. [2021-06-05 18:17:59,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148495 states, 148493 states have (on average 2.6849750493289246) internal successors, (398700), 148494 states have internal predecessors, (398700), 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) [2021-06-05 18:17:59,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148495 states to 148495 states and 398700 transitions. [2021-06-05 18:17:59,850 INFO L78 Accepts]: Start accepts. Automaton has 148495 states and 398700 transitions. Word has length 443 [2021-06-05 18:17:59,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:59,850 INFO L482 AbstractCegarLoop]: Abstraction has 148495 states and 398700 transitions. [2021-06-05 18:17:59,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:17:59,850 INFO L276 IsEmpty]: Start isEmpty. Operand 148495 states and 398700 transitions. [2021-06-05 18:18:00,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-06-05 18:18:00,038 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:00,039 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:00,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 18:18:00,239 INFO L430 AbstractCegarLoop]: === Iteration 108 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:00,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:00,239 INFO L82 PathProgramCache]: Analyzing trace with hash 204368493, now seen corresponding path program 60 times [2021-06-05 18:18:00,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:00,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483905282] [2021-06-05 18:18:00,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:00,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:18:00,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:00,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483905282] [2021-06-05 18:18:00,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483905282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:00,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765428112] [2021-06-05 18:18:00,395 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:00,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:18:00,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:00,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:18:00,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:01,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:18:01,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765428112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:01,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:01,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:18:01,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020891600] [2021-06-05 18:18:01,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:01,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:01,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:01,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:01,286 INFO L87 Difference]: Start difference. First operand 148495 states and 398700 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:18:02,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:02,472 INFO L93 Difference]: Finished difference Result 224125 states and 598255 transitions. [2021-06-05 18:18:02,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:18:02,472 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-06-05 18:18:02,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:02,768 INFO L225 Difference]: With dead ends: 224125 [2021-06-05 18:18:02,768 INFO L226 Difference]: Without dead ends: 224125 [2021-06-05 18:18:02,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 259.4ms TimeCoverageRelationStatistics Valid=397, Invalid=1163, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:18:03,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224125 states. [2021-06-05 18:18:05,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224125 to 152135. [2021-06-05 18:18:05,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152135 states, 152133 states have (on average 2.6854265675428737) internal successors, (408542), 152134 states have internal predecessors, (408542), 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) [2021-06-05 18:18:05,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152135 states to 152135 states and 408542 transitions. [2021-06-05 18:18:05,644 INFO L78 Accepts]: Start accepts. Automaton has 152135 states and 408542 transitions. Word has length 443 [2021-06-05 18:18:05,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:05,644 INFO L482 AbstractCegarLoop]: Abstraction has 152135 states and 408542 transitions. [2021-06-05 18:18:05,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:18:05,645 INFO L276 IsEmpty]: Start isEmpty. Operand 152135 states and 408542 transitions. [2021-06-05 18:18:06,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-06-05 18:18:06,252 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:06,252 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:06,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 18:18:06,467 INFO L430 AbstractCegarLoop]: === Iteration 109 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:06,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:06,468 INFO L82 PathProgramCache]: Analyzing trace with hash 664691791, now seen corresponding path program 61 times [2021-06-05 18:18:06,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:06,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837623315] [2021-06-05 18:18:06,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:06,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:18:06,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:06,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837623315] [2021-06-05 18:18:06,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837623315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:06,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344945382] [2021-06-05 18:18:06,624 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:06,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:06,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:18:06,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:07,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:18:07,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344945382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:07,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:07,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:18:07,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512329546] [2021-06-05 18:18:07,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:07,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:07,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:07,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:07,220 INFO L87 Difference]: Start difference. First operand 152135 states and 408542 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:18:08,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:08,439 INFO L93 Difference]: Finished difference Result 215735 states and 575934 transitions. [2021-06-05 18:18:08,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:18:08,439 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-06-05 18:18:08,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:08,712 INFO L225 Difference]: With dead ends: 215735 [2021-06-05 18:18:08,712 INFO L226 Difference]: Without dead ends: 215735 [2021-06-05 18:18:08,712 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 244.0ms TimeCoverageRelationStatistics Valid=387, Invalid=1095, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:18:08,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215735 states. [2021-06-05 18:18:10,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215735 to 155035. [2021-06-05 18:18:11,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155035 states, 155033 states have (on average 2.685989434507492) internal successors, (416417), 155034 states have internal predecessors, (416417), 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) [2021-06-05 18:18:11,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155035 states to 155035 states and 416417 transitions. [2021-06-05 18:18:11,433 INFO L78 Accepts]: Start accepts. Automaton has 155035 states and 416417 transitions. Word has length 443 [2021-06-05 18:18:11,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:11,434 INFO L482 AbstractCegarLoop]: Abstraction has 155035 states and 416417 transitions. [2021-06-05 18:18:11,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:18:11,434 INFO L276 IsEmpty]: Start isEmpty. Operand 155035 states and 416417 transitions. [2021-06-05 18:18:11,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-06-05 18:18:11,626 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:11,627 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:11,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:11,836 INFO L430 AbstractCegarLoop]: === Iteration 110 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:11,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:11,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1150054611, now seen corresponding path program 62 times [2021-06-05 18:18:11,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:11,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754330679] [2021-06-05 18:18:11,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:11,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:11,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:18:11,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:11,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754330679] [2021-06-05 18:18:11,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754330679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:11,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229029364] [2021-06-05 18:18:11,992 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:12,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:18:12,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:12,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:18:12,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:12,733 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:18:12,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:18:12,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229029364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:12,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:12,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:18:12,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399855522] [2021-06-05 18:18:12,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:12,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:12,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:13,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:13,000 INFO L87 Difference]: Start difference. First operand 155035 states and 416417 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:18:13,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:13,669 INFO L93 Difference]: Finished difference Result 184590 states and 490845 transitions. [2021-06-05 18:18:13,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:18:13,669 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-06-05 18:18:13,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:13,912 INFO L225 Difference]: With dead ends: 184590 [2021-06-05 18:18:13,913 INFO L226 Difference]: Without dead ends: 184590 [2021-06-05 18:18:13,913 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 241.3ms TimeCoverageRelationStatistics Valid=389, Invalid=1093, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:18:14,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184590 states. [2021-06-05 18:18:16,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184590 to 157195. [2021-06-05 18:18:16,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157195 states, 157193 states have (on average 2.6866654367560896) internal successors, (422325), 157194 states have internal predecessors, (422325), 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) [2021-06-05 18:18:17,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157195 states to 157195 states and 422325 transitions. [2021-06-05 18:18:17,113 INFO L78 Accepts]: Start accepts. Automaton has 157195 states and 422325 transitions. Word has length 443 [2021-06-05 18:18:17,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:17,114 INFO L482 AbstractCegarLoop]: Abstraction has 157195 states and 422325 transitions. [2021-06-05 18:18:17,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:18:17,114 INFO L276 IsEmpty]: Start isEmpty. Operand 157195 states and 422325 transitions. [2021-06-05 18:18:17,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-06-05 18:18:17,354 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:17,355 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:17,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:17,555 INFO L430 AbstractCegarLoop]: === Iteration 111 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:17,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:17,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1873867995, now seen corresponding path program 63 times [2021-06-05 18:18:17,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:17,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897195266] [2021-06-05 18:18:17,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:17,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1379 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-06-05 18:18:17,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:17,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897195266] [2021-06-05 18:18:17,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897195266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:17,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955432020] [2021-06-05 18:18:17,725 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:18,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:18:18,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:18,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:18:18,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:18,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:18:18,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955432020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:18,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:18,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-06-05 18:18:18,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845981618] [2021-06-05 18:18:18,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:18,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:18,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:18,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:18,561 INFO L87 Difference]: Start difference. First operand 157195 states and 422325 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:18:19,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:19,732 INFO L93 Difference]: Finished difference Result 194125 states and 517955 transitions. [2021-06-05 18:18:19,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:18:19,732 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-06-05 18:18:19,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:19,966 INFO L225 Difference]: With dead ends: 194125 [2021-06-05 18:18:19,967 INFO L226 Difference]: Without dead ends: 194125 [2021-06-05 18:18:19,967 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 290.9ms TimeCoverageRelationStatistics Valid=496, Invalid=1484, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:18:20,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194125 states. [2021-06-05 18:18:22,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194125 to 158275. [2021-06-05 18:18:22,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158275 states, 158273 states have (on average 2.6869965186734315) internal successors, (425279), 158274 states have internal predecessors, (425279), 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) [2021-06-05 18:18:22,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158275 states to 158275 states and 425279 transitions. [2021-06-05 18:18:22,690 INFO L78 Accepts]: Start accepts. Automaton has 158275 states and 425279 transitions. Word has length 443 [2021-06-05 18:18:22,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:22,695 INFO L482 AbstractCegarLoop]: Abstraction has 158275 states and 425279 transitions. [2021-06-05 18:18:22,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:18:22,695 INFO L276 IsEmpty]: Start isEmpty. Operand 158275 states and 425279 transitions. [2021-06-05 18:18:22,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-06-05 18:18:22,895 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:22,895 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:23,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:23,117 INFO L430 AbstractCegarLoop]: === Iteration 112 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:23,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:23,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1295820423, now seen corresponding path program 64 times [2021-06-05 18:18:23,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:23,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650738005] [2021-06-05 18:18:23,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:23,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1379 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-06-05 18:18:23,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:23,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650738005] [2021-06-05 18:18:23,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650738005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:23,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953283390] [2021-06-05 18:18:23,875 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:24,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:18:24,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:24,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:18:24,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:24,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:18:24,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953283390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:24,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:24,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-06-05 18:18:24,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144432441] [2021-06-05 18:18:24,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:24,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:24,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:24,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:24,835 INFO L87 Difference]: Start difference. First operand 158275 states and 425279 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:18:25,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:25,655 INFO L93 Difference]: Finished difference Result 202530 states and 540291 transitions. [2021-06-05 18:18:25,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:18:25,656 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-06-05 18:18:25,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:25,942 INFO L225 Difference]: With dead ends: 202530 [2021-06-05 18:18:25,943 INFO L226 Difference]: Without dead ends: 202530 [2021-06-05 18:18:25,943 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 354.2ms TimeCoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:18:26,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202530 states. [2021-06-05 18:18:28,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202530 to 157195. [2021-06-05 18:18:28,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157195 states, 157193 states have (on average 2.6866654367560896) internal successors, (422325), 157194 states have internal predecessors, (422325), 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) [2021-06-05 18:18:29,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157195 states to 157195 states and 422325 transitions. [2021-06-05 18:18:29,181 INFO L78 Accepts]: Start accepts. Automaton has 157195 states and 422325 transitions. Word has length 443 [2021-06-05 18:18:29,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:29,182 INFO L482 AbstractCegarLoop]: Abstraction has 157195 states and 422325 transitions. [2021-06-05 18:18:29,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:18:29,182 INFO L276 IsEmpty]: Start isEmpty. Operand 157195 states and 422325 transitions. [2021-06-05 18:18:29,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-06-05 18:18:29,369 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:29,370 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:29,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:29,581 INFO L430 AbstractCegarLoop]: === Iteration 113 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:29,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:29,581 INFO L82 PathProgramCache]: Analyzing trace with hash 142917605, now seen corresponding path program 65 times [2021-06-05 18:18:29,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:29,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537852876] [2021-06-05 18:18:29,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:29,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:29,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1379 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-06-05 18:18:29,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:29,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537852876] [2021-06-05 18:18:29,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537852876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:29,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616754797] [2021-06-05 18:18:29,749 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:30,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:18:30,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:30,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:18:30,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:30,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:18:30,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616754797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:30,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:30,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-06-05 18:18:30,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030841170] [2021-06-05 18:18:30,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:30,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:30,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:30,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:30,438 INFO L87 Difference]: Start difference. First operand 157195 states and 422325 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:18:31,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:31,583 INFO L93 Difference]: Finished difference Result 208415 states and 555982 transitions. [2021-06-05 18:18:31,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:18:31,584 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-06-05 18:18:31,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:31,865 INFO L225 Difference]: With dead ends: 208415 [2021-06-05 18:18:31,865 INFO L226 Difference]: Without dead ends: 208415 [2021-06-05 18:18:31,865 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 641.9ms TimeCoverageRelationStatistics Valid=474, Invalid=1332, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:18:32,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208415 states. [2021-06-05 18:18:34,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208415 to 156115. [2021-06-05 18:18:34,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156115 states, 156113 states have (on average 2.6863297739457956) internal successors, (419371), 156114 states have internal predecessors, (419371), 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) [2021-06-05 18:18:35,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156115 states to 156115 states and 419371 transitions. [2021-06-05 18:18:35,138 INFO L78 Accepts]: Start accepts. Automaton has 156115 states and 419371 transitions. Word has length 443 [2021-06-05 18:18:35,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:35,138 INFO L482 AbstractCegarLoop]: Abstraction has 156115 states and 419371 transitions. [2021-06-05 18:18:35,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:18:35,138 INFO L276 IsEmpty]: Start isEmpty. Operand 156115 states and 419371 transitions. [2021-06-05 18:18:35,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-06-05 18:18:35,368 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:35,368 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:35,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 18:18:35,578 INFO L430 AbstractCegarLoop]: === Iteration 114 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:35,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:35,579 INFO L82 PathProgramCache]: Analyzing trace with hash 603240903, now seen corresponding path program 66 times [2021-06-05 18:18:35,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:35,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267654842] [2021-06-05 18:18:35,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1379 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-06-05 18:18:35,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:35,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267654842] [2021-06-05 18:18:35,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267654842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:35,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233615843] [2021-06-05 18:18:35,796 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:36,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:18:36,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:36,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:18:36,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:36,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:18:36,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233615843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:36,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:36,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-06-05 18:18:36,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817038465] [2021-06-05 18:18:36,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:36,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:36,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:36,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:36,725 INFO L87 Difference]: Start difference. First operand 156115 states and 419371 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:18:37,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:37,965 INFO L93 Difference]: Finished difference Result 204375 states and 544297 transitions. [2021-06-05 18:18:37,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:18:37,966 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-06-05 18:18:37,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:38,259 INFO L225 Difference]: With dead ends: 204375 [2021-06-05 18:18:38,259 INFO L226 Difference]: Without dead ends: 204375 [2021-06-05 18:18:38,259 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 338.6ms TimeCoverageRelationStatistics Valid=463, Invalid=1259, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:18:38,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204375 states. [2021-06-05 18:18:40,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204375 to 160835. [2021-06-05 18:18:40,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160835 states, 160833 states have (on average 2.6870542736876137) internal successors, (432167), 160834 states have internal predecessors, (432167), 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) [2021-06-05 18:18:41,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160835 states to 160835 states and 432167 transitions. [2021-06-05 18:18:41,069 INFO L78 Accepts]: Start accepts. Automaton has 160835 states and 432167 transitions. Word has length 443 [2021-06-05 18:18:41,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:41,069 INFO L482 AbstractCegarLoop]: Abstraction has 160835 states and 432167 transitions. [2021-06-05 18:18:41,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:18:41,070 INFO L276 IsEmpty]: Start isEmpty. Operand 160835 states and 432167 transitions. [2021-06-05 18:18:41,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-06-05 18:18:41,261 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:41,261 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:41,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 18:18:41,462 INFO L430 AbstractCegarLoop]: === Iteration 115 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:41,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:41,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1211505499, now seen corresponding path program 67 times [2021-06-05 18:18:41,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:41,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75938175] [2021-06-05 18:18:41,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:41,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:42,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1379 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-06-05 18:18:42,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:42,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75938175] [2021-06-05 18:18:42,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75938175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:42,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877669843] [2021-06-05 18:18:42,097 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:42,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:18:42,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:42,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:18:42,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877669843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:42,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:42,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-06-05 18:18:42,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596972172] [2021-06-05 18:18:42,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:42,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:42,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:42,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:42,740 INFO L87 Difference]: Start difference. First operand 160835 states and 432167 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:18:43,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:43,544 INFO L93 Difference]: Finished difference Result 203605 states and 542647 transitions. [2021-06-05 18:18:43,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:18:43,545 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-06-05 18:18:43,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:43,823 INFO L225 Difference]: With dead ends: 203605 [2021-06-05 18:18:43,823 INFO L226 Difference]: Without dead ends: 203605 [2021-06-05 18:18:43,824 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 731.5ms TimeCoverageRelationStatistics Valid=452, Invalid=1188, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:18:44,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203605 states. [2021-06-05 18:18:46,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203605 to 160835. [2021-06-05 18:18:46,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160835 states, 160833 states have (on average 2.6870542736876137) internal successors, (432167), 160834 states have internal predecessors, (432167), 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) [2021-06-05 18:18:47,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160835 states to 160835 states and 432167 transitions. [2021-06-05 18:18:47,115 INFO L78 Accepts]: Start accepts. Automaton has 160835 states and 432167 transitions. Word has length 443 [2021-06-05 18:18:47,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:47,115 INFO L482 AbstractCegarLoop]: Abstraction has 160835 states and 432167 transitions. [2021-06-05 18:18:47,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:18:47,115 INFO L276 IsEmpty]: Start isEmpty. Operand 160835 states and 432167 transitions. [2021-06-05 18:18:47,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-06-05 18:18:47,320 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:47,320 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:47,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 18:18:47,521 INFO L430 AbstractCegarLoop]: === Iteration 116 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:47,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:47,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1508334855, now seen corresponding path program 68 times [2021-06-05 18:18:47,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:47,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59680076] [2021-06-05 18:18:47,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:47,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:47,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1379 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-06-05 18:18:47,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:47,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59680076] [2021-06-05 18:18:47,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59680076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:47,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773882970] [2021-06-05 18:18:47,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:47,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:18:47,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:47,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:18:47,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:18:48,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773882970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:48,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:48,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-06-05 18:18:48,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123275564] [2021-06-05 18:18:48,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:48,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:48,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:48,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:48,247 INFO L87 Difference]: Start difference. First operand 160835 states and 432167 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:18:49,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:49,441 INFO L93 Difference]: Finished difference Result 189335 states and 504332 transitions. [2021-06-05 18:18:49,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:18:49,442 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-06-05 18:18:49,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:49,689 INFO L225 Difference]: With dead ends: 189335 [2021-06-05 18:18:49,689 INFO L226 Difference]: Without dead ends: 189335 [2021-06-05 18:18:49,689 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 267.1ms TimeCoverageRelationStatistics Valid=454, Invalid=1186, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:18:49,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189335 states. [2021-06-05 18:18:52,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189335 to 162995. [2021-06-05 18:18:52,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162995 states, 162993 states have (on average 2.6876921094770942) internal successors, (438075), 162994 states have internal predecessors, (438075), 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) [2021-06-05 18:18:52,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162995 states to 162995 states and 438075 transitions. [2021-06-05 18:18:52,987 INFO L78 Accepts]: Start accepts. Automaton has 162995 states and 438075 transitions. Word has length 443 [2021-06-05 18:18:53,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:53,001 INFO L482 AbstractCegarLoop]: Abstraction has 162995 states and 438075 transitions. [2021-06-05 18:18:53,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-06-05 18:18:53,001 INFO L276 IsEmpty]: Start isEmpty. Operand 162995 states and 438075 transitions. [2021-06-05 18:18:53,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-06-05 18:18:53,204 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:53,204 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:53,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:53,413 INFO L430 AbstractCegarLoop]: === Iteration 117 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:53,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:53,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2049783348, now seen corresponding path program 34 times [2021-06-05 18:18:53,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:53,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641960824] [2021-06-05 18:18:53,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:53,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:53,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:18:53,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:53,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641960824] [2021-06-05 18:18:53,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641960824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:53,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448297126] [2021-06-05 18:18:53,596 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:54,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:18:54,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:54,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:18:54,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:55,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:18:55,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448297126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:55,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:55,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:18:55,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682067947] [2021-06-05 18:18:55,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:18:55,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:55,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:18:55,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:18:55,129 INFO L87 Difference]: Start difference. First operand 162995 states and 438075 transitions. Second operand has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-06-05 18:18:56,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:56,354 INFO L93 Difference]: Finished difference Result 190380 states and 508089 transitions. [2021-06-05 18:18:56,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:18:56,354 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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 444 [2021-06-05 18:18:56,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:56,599 INFO L225 Difference]: With dead ends: 190380 [2021-06-05 18:18:56,599 INFO L226 Difference]: Without dead ends: 190380 [2021-06-05 18:18:56,599 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 372.0ms TimeCoverageRelationStatistics Valid=634, Invalid=1916, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 18:18:56,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190380 states. [2021-06-05 18:18:59,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190380 to 161915. [2021-06-05 18:18:59,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161915 states, 161913 states have (on average 2.6873753188440705) internal successors, (435121), 161914 states have internal predecessors, (435121), 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) [2021-06-05 18:18:59,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161915 states to 161915 states and 435121 transitions. [2021-06-05 18:18:59,533 INFO L78 Accepts]: Start accepts. Automaton has 161915 states and 435121 transitions. Word has length 444 [2021-06-05 18:18:59,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:59,534 INFO L482 AbstractCegarLoop]: Abstraction has 161915 states and 435121 transitions. [2021-06-05 18:18:59,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-06-05 18:18:59,534 INFO L276 IsEmpty]: Start isEmpty. Operand 161915 states and 435121 transitions. [2021-06-05 18:19:00,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-06-05 18:19:00,218 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:00,228 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:00,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 18:19:00,447 INFO L430 AbstractCegarLoop]: === Iteration 118 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:00,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:00,447 INFO L82 PathProgramCache]: Analyzing trace with hash 765479472, now seen corresponding path program 35 times [2021-06-05 18:19:00,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:00,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103617563] [2021-06-05 18:19:00,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:00,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:19:00,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:00,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103617563] [2021-06-05 18:19:00,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103617563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:00,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029902069] [2021-06-05 18:19:00,644 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:01,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 18:19:01,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:01,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:01,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:01,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:19:01,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029902069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:01,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:01,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:19:01,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884028766] [2021-06-05 18:19:01,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:01,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:01,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:01,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:01,583 INFO L87 Difference]: Start difference. First operand 161915 states and 435121 transitions. Second operand has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-06-05 18:19:02,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:02,814 INFO L93 Difference]: Finished difference Result 195055 states and 519894 transitions. [2021-06-05 18:19:02,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:19:02,814 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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 444 [2021-06-05 18:19:02,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:03,026 INFO L225 Difference]: With dead ends: 195055 [2021-06-05 18:19:03,026 INFO L226 Difference]: Without dead ends: 195055 [2021-06-05 18:19:03,026 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 364.5ms TimeCoverageRelationStatistics Valid=622, Invalid=1828, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 18:19:03,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195055 states. [2021-06-05 18:19:05,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195055 to 160835. [2021-06-05 18:19:05,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160835 states, 160833 states have (on average 2.6870542736876137) internal successors, (432167), 160834 states have internal predecessors, (432167), 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) [2021-06-05 18:19:05,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160835 states to 160835 states and 432167 transitions. [2021-06-05 18:19:05,815 INFO L78 Accepts]: Start accepts. Automaton has 160835 states and 432167 transitions. Word has length 444 [2021-06-05 18:19:05,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:05,815 INFO L482 AbstractCegarLoop]: Abstraction has 160835 states and 432167 transitions. [2021-06-05 18:19:05,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-06-05 18:19:05,816 INFO L276 IsEmpty]: Start isEmpty. Operand 160835 states and 432167 transitions. [2021-06-05 18:19:06,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-06-05 18:19:06,006 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:06,006 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:06,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:06,207 INFO L430 AbstractCegarLoop]: === Iteration 119 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:06,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:06,207 INFO L82 PathProgramCache]: Analyzing trace with hash 213374132, now seen corresponding path program 36 times [2021-06-05 18:19:06,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:06,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600462397] [2021-06-05 18:19:06,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:06,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:19:06,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:06,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600462397] [2021-06-05 18:19:06,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600462397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:06,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521071807] [2021-06-05 18:19:06,394 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:06,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 18:19:06,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:06,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:06,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:19:07,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521071807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:07,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:07,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:19:07,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71375929] [2021-06-05 18:19:07,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:07,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:07,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:07,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:07,728 INFO L87 Difference]: Start difference. First operand 160835 states and 432167 transitions. Second operand has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-06-05 18:19:08,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:08,612 INFO L93 Difference]: Finished difference Result 200050 states and 532784 transitions. [2021-06-05 18:19:08,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:19:08,612 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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 444 [2021-06-05 18:19:08,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:08,885 INFO L225 Difference]: With dead ends: 200050 [2021-06-05 18:19:08,885 INFO L226 Difference]: Without dead ends: 200050 [2021-06-05 18:19:08,887 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 352.2ms TimeCoverageRelationStatistics Valid=610, Invalid=1742, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:19:09,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200050 states. [2021-06-05 18:19:11,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200050 to 159015. [2021-06-05 18:19:11,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159015 states, 159013 states have (on average 2.6868620804588303) internal successors, (427246), 159014 states have internal predecessors, (427246), 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) [2021-06-05 18:19:12,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159015 states to 159015 states and 427246 transitions. [2021-06-05 18:19:12,233 INFO L78 Accepts]: Start accepts. Automaton has 159015 states and 427246 transitions. Word has length 444 [2021-06-05 18:19:12,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:12,233 INFO L482 AbstractCegarLoop]: Abstraction has 159015 states and 427246 transitions. [2021-06-05 18:19:12,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-06-05 18:19:12,234 INFO L276 IsEmpty]: Start isEmpty. Operand 159015 states and 427246 transitions. [2021-06-05 18:19:12,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-06-05 18:19:12,429 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:12,430 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:12,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 18:19:12,632 INFO L430 AbstractCegarLoop]: === Iteration 120 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:12,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:12,632 INFO L82 PathProgramCache]: Analyzing trace with hash -482534480, now seen corresponding path program 37 times [2021-06-05 18:19:12,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:12,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27505433] [2021-06-05 18:19:12,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:12,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:19:12,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:12,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27505433] [2021-06-05 18:19:12,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27505433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:12,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770503644] [2021-06-05 18:19:12,822 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:12,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:12,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:13,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:19:13,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770503644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:13,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:13,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:19:13,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067826077] [2021-06-05 18:19:13,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:13,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:13,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:13,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:13,427 INFO L87 Difference]: Start difference. First operand 159015 states and 427246 transitions. Second operand has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-06-05 18:19:14,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:14,789 INFO L93 Difference]: Finished difference Result 198935 states and 529553 transitions. [2021-06-05 18:19:14,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:19:14,789 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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 444 [2021-06-05 18:19:14,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:15,119 INFO L225 Difference]: With dead ends: 198935 [2021-06-05 18:19:15,119 INFO L226 Difference]: Without dead ends: 198935 [2021-06-05 18:19:15,119 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 722.3ms TimeCoverageRelationStatistics Valid=598, Invalid=1658, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:19:15,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198935 states. [2021-06-05 18:19:17,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198935 to 157195. [2021-06-05 18:19:17,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157195 states, 157193 states have (on average 2.6866654367560896) internal successors, (422325), 157194 states have internal predecessors, (422325), 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) [2021-06-05 18:19:17,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157195 states to 157195 states and 422325 transitions. [2021-06-05 18:19:17,992 INFO L78 Accepts]: Start accepts. Automaton has 157195 states and 422325 transitions. Word has length 444 [2021-06-05 18:19:17,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:17,993 INFO L482 AbstractCegarLoop]: Abstraction has 157195 states and 422325 transitions. [2021-06-05 18:19:17,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-06-05 18:19:17,993 INFO L276 IsEmpty]: Start isEmpty. Operand 157195 states and 422325 transitions. [2021-06-05 18:19:18,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-06-05 18:19:18,190 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:18,190 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:18,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:18,393 INFO L430 AbstractCegarLoop]: === Iteration 121 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:18,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:18,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1312658228, now seen corresponding path program 38 times [2021-06-05 18:19:18,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:18,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759891448] [2021-06-05 18:19:18,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:18,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:19,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:19:19,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:19,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759891448] [2021-06-05 18:19:19,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759891448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:19,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071463961] [2021-06-05 18:19:19,072 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:19,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:19:19,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:19,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:19,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:19,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:19:19,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071463961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:19,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:19,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:19:19,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246478515] [2021-06-05 18:19:19,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:19,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:19,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:19,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:19,720 INFO L87 Difference]: Start difference. First operand 157195 states and 422325 transitions. Second operand has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-06-05 18:19:20,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:20,518 INFO L93 Difference]: Finished difference Result 194530 states and 517760 transitions. [2021-06-05 18:19:20,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:19:20,518 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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 444 [2021-06-05 18:19:20,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:20,756 INFO L225 Difference]: With dead ends: 194530 [2021-06-05 18:19:20,756 INFO L226 Difference]: Without dead ends: 194530 [2021-06-05 18:19:20,757 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 816.2ms TimeCoverageRelationStatistics Valid=586, Invalid=1576, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:19:21,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194530 states. [2021-06-05 18:19:23,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194530 to 159015. [2021-06-05 18:19:23,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159015 states, 159013 states have (on average 2.6868620804588303) internal successors, (427246), 159014 states have internal predecessors, (427246), 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) [2021-06-05 18:19:23,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159015 states to 159015 states and 427246 transitions. [2021-06-05 18:19:23,867 INFO L78 Accepts]: Start accepts. Automaton has 159015 states and 427246 transitions. Word has length 444 [2021-06-05 18:19:23,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:23,867 INFO L482 AbstractCegarLoop]: Abstraction has 159015 states and 427246 transitions. [2021-06-05 18:19:23,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-06-05 18:19:23,867 INFO L276 IsEmpty]: Start isEmpty. Operand 159015 states and 427246 transitions. [2021-06-05 18:19:24,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-06-05 18:19:24,054 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:24,054 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:24,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:24,255 INFO L430 AbstractCegarLoop]: === Iteration 122 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:24,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:24,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1460325680, now seen corresponding path program 39 times [2021-06-05 18:19:24,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:24,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609198010] [2021-06-05 18:19:24,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:24,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:19:24,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:24,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609198010] [2021-06-05 18:19:24,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609198010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:24,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311130612] [2021-06-05 18:19:24,441 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:24,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 18:19:24,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:25,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:25,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:25,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:19:25,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311130612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:25,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:25,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:19:25,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125397236] [2021-06-05 18:19:25,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:25,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:25,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:25,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:25,455 INFO L87 Difference]: Start difference. First operand 159015 states and 427246 transitions. Second operand has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-06-05 18:19:26,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:26,634 INFO L93 Difference]: Finished difference Result 190075 states and 506227 transitions. [2021-06-05 18:19:26,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:19:26,635 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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 444 [2021-06-05 18:19:26,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:26,879 INFO L225 Difference]: With dead ends: 190075 [2021-06-05 18:19:26,880 INFO L226 Difference]: Without dead ends: 190075 [2021-06-05 18:19:26,880 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 728.6ms TimeCoverageRelationStatistics Valid=574, Invalid=1496, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:19:27,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190075 states. [2021-06-05 18:19:29,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190075 to 157935. [2021-06-05 18:19:29,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157935 states, 157933 states have (on average 2.6865316305015416) internal successors, (424292), 157934 states have internal predecessors, (424292), 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) [2021-06-05 18:19:29,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157935 states to 157935 states and 424292 transitions. [2021-06-05 18:19:29,684 INFO L78 Accepts]: Start accepts. Automaton has 157935 states and 424292 transitions. Word has length 444 [2021-06-05 18:19:29,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:29,685 INFO L482 AbstractCegarLoop]: Abstraction has 157935 states and 424292 transitions. [2021-06-05 18:19:29,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-06-05 18:19:29,685 INFO L276 IsEmpty]: Start isEmpty. Operand 157935 states and 424292 transitions. [2021-06-05 18:19:30,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-06-05 18:19:30,328 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:30,328 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:30,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-06-05 18:19:30,541 INFO L430 AbstractCegarLoop]: === Iteration 123 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:30,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:30,541 INFO L82 PathProgramCache]: Analyzing trace with hash -186224204, now seen corresponding path program 40 times [2021-06-05 18:19:30,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:30,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83442801] [2021-06-05 18:19:30,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:30,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:30,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:19:30,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:30,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83442801] [2021-06-05 18:19:30,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83442801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:30,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352490745] [2021-06-05 18:19:30,741 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:31,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:31,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:31,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:31,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:31,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:19:31,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352490745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:31,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:31,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:19:31,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751512590] [2021-06-05 18:19:31,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:31,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:31,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:31,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:31,677 INFO L87 Difference]: Start difference. First operand 157935 states and 424292 transitions. Second operand has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-06-05 18:19:32,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:32,858 INFO L93 Difference]: Finished difference Result 187770 states and 499408 transitions. [2021-06-05 18:19:32,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:19:32,859 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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 444 [2021-06-05 18:19:32,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:33,067 INFO L225 Difference]: With dead ends: 187770 [2021-06-05 18:19:33,067 INFO L226 Difference]: Without dead ends: 187770 [2021-06-05 18:19:33,067 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 323.3ms TimeCoverageRelationStatistics Valid=562, Invalid=1418, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:19:33,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187770 states. [2021-06-05 18:19:35,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187770 to 156855. [2021-06-05 18:19:35,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156855 states, 156853 states have (on average 2.686196629965637) internal successors, (421338), 156854 states have internal predecessors, (421338), 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) [2021-06-05 18:19:35,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156855 states to 156855 states and 421338 transitions. [2021-06-05 18:19:35,722 INFO L78 Accepts]: Start accepts. Automaton has 156855 states and 421338 transitions. Word has length 444 [2021-06-05 18:19:35,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:35,723 INFO L482 AbstractCegarLoop]: Abstraction has 156855 states and 421338 transitions. [2021-06-05 18:19:35,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-06-05 18:19:35,723 INFO L276 IsEmpty]: Start isEmpty. Operand 156855 states and 421338 transitions. [2021-06-05 18:19:35,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-06-05 18:19:35,918 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:35,918 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:36,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 18:19:36,119 INFO L430 AbstractCegarLoop]: === Iteration 124 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:36,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:36,119 INFO L82 PathProgramCache]: Analyzing trace with hash -505323856, now seen corresponding path program 41 times [2021-06-05 18:19:36,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:36,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321761802] [2021-06-05 18:19:36,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:36,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:19:36,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:36,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321761802] [2021-06-05 18:19:36,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321761802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:36,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054630855] [2021-06-05 18:19:36,338 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:36,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 18:19:36,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:36,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:36,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:37,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:19:37,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054630855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:37,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:37,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:19:37,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791396193] [2021-06-05 18:19:37,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:37,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:37,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:37,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:37,708 INFO L87 Difference]: Start difference. First operand 156855 states and 421338 transitions. Second operand has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-06-05 18:19:38,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:38,459 INFO L93 Difference]: Finished difference Result 180580 states and 481042 transitions. [2021-06-05 18:19:38,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:19:38,459 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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 444 [2021-06-05 18:19:38,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:38,694 INFO L225 Difference]: With dead ends: 180580 [2021-06-05 18:19:38,694 INFO L226 Difference]: Without dead ends: 180580 [2021-06-05 18:19:38,694 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 340.2ms TimeCoverageRelationStatistics Valid=550, Invalid=1342, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:19:38,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180580 states. [2021-06-05 18:19:40,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180580 to 156855. [2021-06-05 18:19:41,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156855 states, 156853 states have (on average 2.686196629965637) internal successors, (421338), 156854 states have internal predecessors, (421338), 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) [2021-06-05 18:19:41,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156855 states to 156855 states and 421338 transitions. [2021-06-05 18:19:41,845 INFO L78 Accepts]: Start accepts. Automaton has 156855 states and 421338 transitions. Word has length 444 [2021-06-05 18:19:41,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:41,846 INFO L482 AbstractCegarLoop]: Abstraction has 156855 states and 421338 transitions. [2021-06-05 18:19:41,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-06-05 18:19:41,846 INFO L276 IsEmpty]: Start isEmpty. Operand 156855 states and 421338 transitions. [2021-06-05 18:19:42,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-06-05 18:19:42,048 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:42,049 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:42,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:42,249 INFO L430 AbstractCegarLoop]: === Iteration 125 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:42,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:42,249 INFO L82 PathProgramCache]: Analyzing trace with hash 953839668, now seen corresponding path program 42 times [2021-06-05 18:19:42,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:42,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112203156] [2021-06-05 18:19:42,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:42,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1713 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 18:19:42,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:42,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112203156] [2021-06-05 18:19:42,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112203156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:42,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615135282] [2021-06-05 18:19:42,465 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:43,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 18:19:43,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:43,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:43,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:43,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:19:43,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615135282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:43,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:43,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 24 [2021-06-05 18:19:43,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198216206] [2021-06-05 18:19:43,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:43,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:43,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:43,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:43,528 INFO L87 Difference]: Start difference. First operand 156855 states and 421338 transitions. Second operand has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-06-05 18:19:44,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:44,697 INFO L93 Difference]: Finished difference Result 173180 states and 462261 transitions. [2021-06-05 18:19:44,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:19:44,697 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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 444 [2021-06-05 18:19:44,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:44,898 INFO L225 Difference]: With dead ends: 173180 [2021-06-05 18:19:44,899 INFO L226 Difference]: Without dead ends: 173180 [2021-06-05 18:19:44,899 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 332.2ms TimeCoverageRelationStatistics Valid=629, Invalid=1441, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:19:45,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173180 states. [2021-06-05 18:19:47,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173180 to 152535. [2021-06-05 18:19:47,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152535 states, 152533 states have (on average 2.6848091888312693) internal successors, (409522), 152534 states have internal predecessors, (409522), 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) [2021-06-05 18:19:47,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152535 states to 152535 states and 409522 transitions. [2021-06-05 18:19:47,443 INFO L78 Accepts]: Start accepts. Automaton has 152535 states and 409522 transitions. Word has length 444 [2021-06-05 18:19:47,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:47,443 INFO L482 AbstractCegarLoop]: Abstraction has 152535 states and 409522 transitions. [2021-06-05 18:19:47,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-06-05 18:19:47,443 INFO L276 IsEmpty]: Start isEmpty. Operand 152535 states and 409522 transitions. [2021-06-05 18:19:47,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2021-06-05 18:19:47,635 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:47,635 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:47,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 18:19:47,836 INFO L430 AbstractCegarLoop]: === Iteration 126 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:47,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:47,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1907019601, now seen corresponding path program 12 times [2021-06-05 18:19:47,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:47,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485828650] [2021-06-05 18:19:47,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:48,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2526 backedges. 36 proven. 2490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:48,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:48,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485828650] [2021-06-05 18:19:48,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485828650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:48,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453600524] [2021-06-05 18:19:48,088 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:48,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 18:19:48,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:48,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:19:48,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:49,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2526 backedges. 36 proven. 2490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:49,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453600524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:49,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:49,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-05 18:19:49,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998149226] [2021-06-05 18:19:49,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:19:49,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:49,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:19:49,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:19:49,539 INFO L87 Difference]: Start difference. First operand 152535 states and 409522 transitions. Second operand has 29 states, 29 states have (on average 17.96551724137931) internal successors, (521), 29 states have internal predecessors, (521), 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) [2021-06-05 18:19:50,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:50,397 INFO L93 Difference]: Finished difference Result 167942 states and 449033 transitions. [2021-06-05 18:19:50,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:19:50,397 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 17.96551724137931) internal successors, (521), 29 states have internal predecessors, (521), 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 474 [2021-06-05 18:19:50,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:50,616 INFO L225 Difference]: With dead ends: 167942 [2021-06-05 18:19:50,616 INFO L226 Difference]: Without dead ends: 167942 [2021-06-05 18:19:50,616 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 447.6ms TimeCoverageRelationStatistics Valid=875, Invalid=1881, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 18:19:50,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167942 states. [2021-06-05 18:19:52,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167942 to 159090. [2021-06-05 18:19:52,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159090 states, 159088 states have (on average 2.684627376043448) internal successors, (427092), 159089 states have internal predecessors, (427092), 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) [2021-06-05 18:19:53,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159090 states to 159090 states and 427092 transitions. [2021-06-05 18:19:53,251 INFO L78 Accepts]: Start accepts. Automaton has 159090 states and 427092 transitions. Word has length 474 [2021-06-05 18:19:53,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:53,252 INFO L482 AbstractCegarLoop]: Abstraction has 159090 states and 427092 transitions. [2021-06-05 18:19:53,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 17.96551724137931) internal successors, (521), 29 states have internal predecessors, (521), 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) [2021-06-05 18:19:53,252 INFO L276 IsEmpty]: Start isEmpty. Operand 159090 states and 427092 transitions. [2021-06-05 18:19:53,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2021-06-05 18:19:53,860 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:53,860 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:54,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:54,078 INFO L430 AbstractCegarLoop]: === Iteration 127 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:54,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:54,078 INFO L82 PathProgramCache]: Analyzing trace with hash 708200055, now seen corresponding path program 69 times [2021-06-05 18:19:54,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:54,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185812595] [2021-06-05 18:19:54,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:54,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1319 backedges. 24 proven. 1178 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-06-05 18:19:54,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:54,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185812595] [2021-06-05 18:19:54,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185812595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:54,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311786906] [2021-06-05 18:19:54,216 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:54,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:19:54,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:54,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:19:54,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:55,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1319 backedges. 24 proven. 1155 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-06-05 18:19:55,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311786906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:55,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:55,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-06-05 18:19:55,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52279242] [2021-06-05 18:19:55,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:19:55,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:55,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:19:55,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:19:55,021 INFO L87 Difference]: Start difference. First operand 159090 states and 427092 transitions. Second operand has 17 states, 17 states have (on average 22.764705882352942) internal successors, (387), 17 states have internal predecessors, (387), 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) [2021-06-05 18:19:56,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:56,305 INFO L93 Difference]: Finished difference Result 277120 states and 738750 transitions. [2021-06-05 18:19:56,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:19:56,306 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 22.764705882352942) internal successors, (387), 17 states have internal predecessors, (387), 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 476 [2021-06-05 18:19:56,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:56,648 INFO L225 Difference]: With dead ends: 277120 [2021-06-05 18:19:56,648 INFO L226 Difference]: Without dead ends: 277120 [2021-06-05 18:19:56,649 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 186.2ms TimeCoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:19:56,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277120 states. [2021-06-05 18:19:59,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277120 to 193710. [2021-06-05 18:20:00,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193710 states, 193708 states have (on average 2.6894759121977407) internal successors, (520973), 193709 states have internal predecessors, (520973), 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) [2021-06-05 18:20:00,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193710 states to 193710 states and 520973 transitions. [2021-06-05 18:20:00,507 INFO L78 Accepts]: Start accepts. Automaton has 193710 states and 520973 transitions. Word has length 476 [2021-06-05 18:20:00,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:00,508 INFO L482 AbstractCegarLoop]: Abstraction has 193710 states and 520973 transitions. [2021-06-05 18:20:00,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 22.764705882352942) internal successors, (387), 17 states have internal predecessors, (387), 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) [2021-06-05 18:20:00,508 INFO L276 IsEmpty]: Start isEmpty. Operand 193710 states and 520973 transitions. [2021-06-05 18:20:00,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-06-05 18:20:00,746 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:00,746 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:00,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 18:20:00,953 INFO L430 AbstractCegarLoop]: === Iteration 128 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:00,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:00,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1297563502, now seen corresponding path program 70 times [2021-06-05 18:20:00,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:00,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319530867] [2021-06-05 18:20:00,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:00,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:20:01,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:01,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319530867] [2021-06-05 18:20:01,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319530867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:01,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288616398] [2021-06-05 18:20:01,702 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:02,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:20:02,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:02,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:02,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:02,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:20:02,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288616398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:02,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:02,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:20:02,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983955725] [2021-06-05 18:20:02,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:20:02,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:02,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:20:02,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:20:02,691 INFO L87 Difference]: Start difference. First operand 193710 states and 520973 transitions. Second operand has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:20:04,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:04,106 INFO L93 Difference]: Finished difference Result 252720 states and 674678 transitions. [2021-06-05 18:20:04,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:20:04,107 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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 477 [2021-06-05 18:20:04,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:04,479 INFO L225 Difference]: With dead ends: 252720 [2021-06-05 18:20:04,479 INFO L226 Difference]: Without dead ends: 252720 [2021-06-05 18:20:04,479 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 301.1ms TimeCoverageRelationStatistics Valid=360, Invalid=1200, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:20:04,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252720 states. [2021-06-05 18:20:07,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252720 to 190550. [2021-06-05 18:20:08,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190550 states, 190548 states have (on average 2.689269895249491) internal successors, (512435), 190549 states have internal predecessors, (512435), 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) [2021-06-05 18:20:08,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190550 states to 190550 states and 512435 transitions. [2021-06-05 18:20:08,972 INFO L78 Accepts]: Start accepts. Automaton has 190550 states and 512435 transitions. Word has length 477 [2021-06-05 18:20:08,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:08,972 INFO L482 AbstractCegarLoop]: Abstraction has 190550 states and 512435 transitions. [2021-06-05 18:20:08,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:20:08,973 INFO L276 IsEmpty]: Start isEmpty. Operand 190550 states and 512435 transitions. [2021-06-05 18:20:09,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-06-05 18:20:09,232 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:09,232 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:09,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:09,449 INFO L430 AbstractCegarLoop]: === Iteration 129 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:09,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:09,449 INFO L82 PathProgramCache]: Analyzing trace with hash 356970726, now seen corresponding path program 71 times [2021-06-05 18:20:09,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:09,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856299425] [2021-06-05 18:20:09,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:09,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:20:09,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:09,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856299425] [2021-06-05 18:20:09,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856299425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:09,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944209970] [2021-06-05 18:20:09,627 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:10,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:20:10,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:10,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:10,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:20:10,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944209970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:10,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:10,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:20:10,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587075239] [2021-06-05 18:20:10,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:20:10,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:10,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:20:10,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:20:10,475 INFO L87 Difference]: Start difference. First operand 190550 states and 512435 transitions. Second operand has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:20:11,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:11,887 INFO L93 Difference]: Finished difference Result 286290 states and 766535 transitions. [2021-06-05 18:20:11,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:20:11,888 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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 477 [2021-06-05 18:20:11,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:12,281 INFO L225 Difference]: With dead ends: 286290 [2021-06-05 18:20:12,282 INFO L226 Difference]: Without dead ends: 286290 [2021-06-05 18:20:12,282 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 243.4ms TimeCoverageRelationStatistics Valid=345, Invalid=1137, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:20:12,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286290 states. [2021-06-05 18:20:15,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286290 to 193450. [2021-06-05 18:20:15,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193450 states, 193448 states have (on average 2.68966337206898) internal successors, (520310), 193449 states have internal predecessors, (520310), 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) [2021-06-05 18:20:16,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193450 states to 193450 states and 520310 transitions. [2021-06-05 18:20:16,273 INFO L78 Accepts]: Start accepts. Automaton has 193450 states and 520310 transitions. Word has length 477 [2021-06-05 18:20:16,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:16,274 INFO L482 AbstractCegarLoop]: Abstraction has 193450 states and 520310 transitions. [2021-06-05 18:20:16,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:20:16,274 INFO L276 IsEmpty]: Start isEmpty. Operand 193450 states and 520310 transitions. [2021-06-05 18:20:16,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-06-05 18:20:16,520 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:16,520 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:16,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 18:20:16,720 INFO L430 AbstractCegarLoop]: === Iteration 130 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:16,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:16,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1902005308, now seen corresponding path program 72 times [2021-06-05 18:20:16,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:16,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198945545] [2021-06-05 18:20:16,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:16,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:17,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:20:17,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:17,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198945545] [2021-06-05 18:20:17,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198945545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:17,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874934977] [2021-06-05 18:20:17,495 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:17,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:20:17,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:17,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:17,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:18,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:20:18,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874934977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:18,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:18,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:20:18,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132655314] [2021-06-05 18:20:18,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:20:18,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:18,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:20:18,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:20:18,403 INFO L87 Difference]: Start difference. First operand 193450 states and 520310 transitions. Second operand has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:20:19,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:19,742 INFO L93 Difference]: Finished difference Result 270730 states and 724052 transitions. [2021-06-05 18:20:19,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:20:19,742 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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 477 [2021-06-05 18:20:19,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:20,114 INFO L225 Difference]: With dead ends: 270730 [2021-06-05 18:20:20,114 INFO L226 Difference]: Without dead ends: 270730 [2021-06-05 18:20:20,114 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 263.3ms TimeCoverageRelationStatistics Valid=347, Invalid=1135, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:20:20,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270730 states. [2021-06-05 18:20:23,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270730 to 196690. [2021-06-05 18:20:23,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196690 states, 196688 states have (on average 2.6904132433092003) internal successors, (529172), 196689 states have internal predecessors, (529172), 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) [2021-06-05 18:20:24,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196690 states to 196690 states and 529172 transitions. [2021-06-05 18:20:24,125 INFO L78 Accepts]: Start accepts. Automaton has 196690 states and 529172 transitions. Word has length 477 [2021-06-05 18:20:24,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:24,125 INFO L482 AbstractCegarLoop]: Abstraction has 196690 states and 529172 transitions. [2021-06-05 18:20:24,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:20:24,125 INFO L276 IsEmpty]: Start isEmpty. Operand 196690 states and 529172 transitions. [2021-06-05 18:20:24,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-06-05 18:20:24,355 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:24,355 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:24,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 18:20:24,556 INFO L430 AbstractCegarLoop]: === Iteration 131 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:24,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:24,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1267683110, now seen corresponding path program 73 times [2021-06-05 18:20:24,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:24,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449726575] [2021-06-05 18:20:24,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:24,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:24,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:20:24,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:24,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449726575] [2021-06-05 18:20:24,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449726575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:24,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469734183] [2021-06-05 18:20:24,711 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:24,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:24,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:25,740 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:20:25,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:20:25,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469734183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:25,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:25,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:20:25,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423632463] [2021-06-05 18:20:25,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:20:25,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:25,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:20:25,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:20:25,752 INFO L87 Difference]: Start difference. First operand 196690 states and 529172 transitions. Second operand has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:20:26,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:26,655 INFO L93 Difference]: Finished difference Result 251030 states and 669861 transitions. [2021-06-05 18:20:26,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:20:26,656 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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 477 [2021-06-05 18:20:26,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:27,015 INFO L225 Difference]: With dead ends: 251030 [2021-06-05 18:20:27,015 INFO L226 Difference]: Without dead ends: 251030 [2021-06-05 18:20:27,016 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 240.9ms TimeCoverageRelationStatistics Valid=349, Invalid=1133, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:20:27,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251030 states. [2021-06-05 18:20:30,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251030 to 204430. [2021-06-05 18:20:30,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204430 states, 204428 states have (on average 2.6913583266480128) internal successors, (550189), 204429 states have internal predecessors, (550189), 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) [2021-06-05 18:20:30,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204430 states to 204430 states and 550189 transitions. [2021-06-05 18:20:30,842 INFO L78 Accepts]: Start accepts. Automaton has 204430 states and 550189 transitions. Word has length 477 [2021-06-05 18:20:30,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:30,842 INFO L482 AbstractCegarLoop]: Abstraction has 204430 states and 550189 transitions. [2021-06-05 18:20:30,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:20:30,843 INFO L276 IsEmpty]: Start isEmpty. Operand 204430 states and 550189 transitions. [2021-06-05 18:20:31,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-06-05 18:20:31,642 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:31,642 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:31,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:31,853 INFO L430 AbstractCegarLoop]: === Iteration 132 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:31,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:31,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1030484882, now seen corresponding path program 74 times [2021-06-05 18:20:31,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:31,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244526417] [2021-06-05 18:20:31,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:31,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:32,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:20:32,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:32,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244526417] [2021-06-05 18:20:32,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244526417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:32,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962337317] [2021-06-05 18:20:32,010 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:32,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:20:32,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:32,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:32,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:32,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:20:32,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962337317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:32,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:32,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:20:32,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94775855] [2021-06-05 18:20:32,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:20:32,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:32,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:20:32,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:20:32,624 INFO L87 Difference]: Start difference. First operand 204430 states and 550189 transitions. Second operand has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:20:33,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:33,905 INFO L93 Difference]: Finished difference Result 289310 states and 774756 transitions. [2021-06-05 18:20:33,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:20:33,905 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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 477 [2021-06-05 18:20:33,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:34,323 INFO L225 Difference]: With dead ends: 289310 [2021-06-05 18:20:34,323 INFO L226 Difference]: Without dead ends: 289310 [2021-06-05 18:20:34,323 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 242.8ms TimeCoverageRelationStatistics Valid=344, Invalid=1138, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:20:34,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289310 states. [2021-06-05 18:20:37,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289310 to 205510. [2021-06-05 18:20:38,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205510 states, 205508 states have (on average 2.6915886486170852) internal successors, (553143), 205509 states have internal predecessors, (553143), 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) [2021-06-05 18:20:38,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205510 states to 205510 states and 553143 transitions. [2021-06-05 18:20:38,595 INFO L78 Accepts]: Start accepts. Automaton has 205510 states and 553143 transitions. Word has length 477 [2021-06-05 18:20:38,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:38,595 INFO L482 AbstractCegarLoop]: Abstraction has 205510 states and 553143 transitions. [2021-06-05 18:20:38,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:20:38,595 INFO L276 IsEmpty]: Start isEmpty. Operand 205510 states and 553143 transitions. [2021-06-05 18:20:39,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-06-05 18:20:39,395 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:39,395 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:39,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:39,612 INFO L430 AbstractCegarLoop]: === Iteration 133 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:39,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:39,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1005506380, now seen corresponding path program 75 times [2021-06-05 18:20:39,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:39,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356965456] [2021-06-05 18:20:39,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:39,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:39,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:20:39,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:39,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356965456] [2021-06-05 18:20:39,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356965456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:39,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52286159] [2021-06-05 18:20:39,776 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:40,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:20:40,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:40,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:40,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:40,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:20:40,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52286159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:40,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:40,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:20:40,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701474328] [2021-06-05 18:20:40,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:20:40,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:40,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:20:40,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:20:40,712 INFO L87 Difference]: Start difference. First operand 205510 states and 553143 transitions. Second operand has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:20:42,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:42,170 INFO L93 Difference]: Finished difference Result 351585 states and 943572 transitions. [2021-06-05 18:20:42,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:20:42,171 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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 477 [2021-06-05 18:20:42,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:42,641 INFO L225 Difference]: With dead ends: 351585 [2021-06-05 18:20:42,641 INFO L226 Difference]: Without dead ends: 351585 [2021-06-05 18:20:42,641 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 238.7ms TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:20:43,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351585 states. [2021-06-05 18:20:46,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351585 to 206590. [2021-06-05 18:20:46,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206590 states, 206588 states have (on average 2.6918165624334423) internal successors, (556097), 206589 states have internal predecessors, (556097), 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) [2021-06-05 18:20:47,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206590 states to 206590 states and 556097 transitions. [2021-06-05 18:20:47,446 INFO L78 Accepts]: Start accepts. Automaton has 206590 states and 556097 transitions. Word has length 477 [2021-06-05 18:20:47,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:47,446 INFO L482 AbstractCegarLoop]: Abstraction has 206590 states and 556097 transitions. [2021-06-05 18:20:47,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:20:47,446 INFO L276 IsEmpty]: Start isEmpty. Operand 206590 states and 556097 transitions. [2021-06-05 18:20:47,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-06-05 18:20:47,766 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:47,766 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:47,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:47,967 INFO L430 AbstractCegarLoop]: === Iteration 134 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:47,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:47,967 INFO L82 PathProgramCache]: Analyzing trace with hash -119772498, now seen corresponding path program 76 times [2021-06-05 18:20:47,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:47,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908520136] [2021-06-05 18:20:47,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:47,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:48,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:20:48,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:48,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908520136] [2021-06-05 18:20:48,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908520136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:48,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587274626] [2021-06-05 18:20:48,125 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:48,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:20:48,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:48,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:48,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:49,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:20:49,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587274626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:49,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:49,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:20:49,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708841388] [2021-06-05 18:20:49,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:20:49,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:49,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:20:49,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:20:49,134 INFO L87 Difference]: Start difference. First operand 206590 states and 556097 transitions. Second operand has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:20:50,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:50,493 INFO L93 Difference]: Finished difference Result 288495 states and 772775 transitions. [2021-06-05 18:20:50,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:20:50,493 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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 477 [2021-06-05 18:20:50,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:50,889 INFO L225 Difference]: With dead ends: 288495 [2021-06-05 18:20:50,889 INFO L226 Difference]: Without dead ends: 288495 [2021-06-05 18:20:50,889 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 227.3ms TimeCoverageRelationStatistics Valid=334, Invalid=1072, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:20:51,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288495 states. [2021-06-05 18:20:54,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288495 to 209750. [2021-06-05 18:20:54,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209750 states, 209748 states have (on average 2.6919684573869596) internal successors, (564635), 209749 states have internal predecessors, (564635), 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) [2021-06-05 18:20:55,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209750 states to 209750 states and 564635 transitions. [2021-06-05 18:20:55,277 INFO L78 Accepts]: Start accepts. Automaton has 209750 states and 564635 transitions. Word has length 477 [2021-06-05 18:20:55,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:55,278 INFO L482 AbstractCegarLoop]: Abstraction has 209750 states and 564635 transitions. [2021-06-05 18:20:55,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:20:55,278 INFO L276 IsEmpty]: Start isEmpty. Operand 209750 states and 564635 transitions. [2021-06-05 18:20:55,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-06-05 18:20:55,594 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:55,594 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:55,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:55,812 INFO L430 AbstractCegarLoop]: === Iteration 135 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:55,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:55,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1411403858, now seen corresponding path program 77 times [2021-06-05 18:20:55,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:55,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206838825] [2021-06-05 18:20:55,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:55,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:56,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:20:56,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:56,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206838825] [2021-06-05 18:20:56,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206838825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:56,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643863538] [2021-06-05 18:20:56,016 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:56,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:20:56,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:56,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:56,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:57,053 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:20:57,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:20:57,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643863538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:57,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:57,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:20:57,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006692085] [2021-06-05 18:20:57,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:20:57,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:57,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:20:57,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:20:57,419 INFO L87 Difference]: Start difference. First operand 209750 states and 564635 transitions. Second operand has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:20:58,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:58,376 INFO L93 Difference]: Finished difference Result 291855 states and 781159 transitions. [2021-06-05 18:20:58,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:20:58,377 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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 477 [2021-06-05 18:20:58,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:59,129 INFO L225 Difference]: With dead ends: 291855 [2021-06-05 18:20:59,129 INFO L226 Difference]: Without dead ends: 291855 [2021-06-05 18:20:59,130 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 227.3ms TimeCoverageRelationStatistics Valid=346, Invalid=1136, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:20:59,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291855 states. [2021-06-05 18:21:02,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291855 to 214070. [2021-06-05 18:21:02,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214070 states, 214068 states have (on average 2.692840592708859) internal successors, (576451), 214069 states have internal predecessors, (576451), 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) [2021-06-05 18:21:03,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214070 states to 214070 states and 576451 transitions. [2021-06-05 18:21:03,171 INFO L78 Accepts]: Start accepts. Automaton has 214070 states and 576451 transitions. Word has length 477 [2021-06-05 18:21:03,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:03,172 INFO L482 AbstractCegarLoop]: Abstraction has 214070 states and 576451 transitions. [2021-06-05 18:21:03,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:21:03,172 INFO L276 IsEmpty]: Start isEmpty. Operand 214070 states and 576451 transitions. [2021-06-05 18:21:03,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-06-05 18:21:03,457 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:03,458 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:03,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 18:21:03,658 INFO L430 AbstractCegarLoop]: === Iteration 136 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:03,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:03,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1758284560, now seen corresponding path program 78 times [2021-06-05 18:21:03,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:03,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466668483] [2021-06-05 18:21:03,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:03,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:03,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:21:03,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:03,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466668483] [2021-06-05 18:21:03,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466668483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:03,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514150578] [2021-06-05 18:21:03,815 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:04,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:21:04,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:04,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:21:04,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:05,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:21:05,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514150578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:05,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:05,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:21:05,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10713997] [2021-06-05 18:21:05,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:21:05,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:05,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:21:05,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:21:05,207 INFO L87 Difference]: Start difference. First operand 214070 states and 576451 transitions. Second operand has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:21:06,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:06,221 INFO L93 Difference]: Finished difference Result 306925 states and 822456 transitions. [2021-06-05 18:21:06,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:21:06,221 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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 477 [2021-06-05 18:21:06,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:06,993 INFO L225 Difference]: With dead ends: 306925 [2021-06-05 18:21:06,993 INFO L226 Difference]: Without dead ends: 306925 [2021-06-05 18:21:06,994 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 229.7ms TimeCoverageRelationStatistics Valid=336, Invalid=1070, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:21:07,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306925 states. [2021-06-05 18:21:10,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306925 to 214070. [2021-06-05 18:21:10,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214070 states, 214068 states have (on average 2.692840592708859) internal successors, (576451), 214069 states have internal predecessors, (576451), 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) [2021-06-05 18:21:11,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214070 states to 214070 states and 576451 transitions. [2021-06-05 18:21:11,176 INFO L78 Accepts]: Start accepts. Automaton has 214070 states and 576451 transitions. Word has length 477 [2021-06-05 18:21:11,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:11,176 INFO L482 AbstractCegarLoop]: Abstraction has 214070 states and 576451 transitions. [2021-06-05 18:21:11,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:21:11,176 INFO L276 IsEmpty]: Start isEmpty. Operand 214070 states and 576451 transitions. [2021-06-05 18:21:11,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-06-05 18:21:11,445 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:11,445 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:11,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 18:21:11,646 INFO L430 AbstractCegarLoop]: === Iteration 137 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:11,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:11,646 INFO L82 PathProgramCache]: Analyzing trace with hash 605381742, now seen corresponding path program 79 times [2021-06-05 18:21:11,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:11,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386509198] [2021-06-05 18:21:11,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:11,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:21:11,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:11,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386509198] [2021-06-05 18:21:11,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386509198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:11,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657554630] [2021-06-05 18:21:11,799 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:11,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:21:11,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:12,796 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:21:12,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:21:12,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657554630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:12,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:12,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:21:12,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883058989] [2021-06-05 18:21:12,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:21:12,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:12,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:21:12,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:21:12,815 INFO L87 Difference]: Start difference. First operand 214070 states and 576451 transitions. Second operand has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:21:13,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:13,694 INFO L93 Difference]: Finished difference Result 254075 states and 678038 transitions. [2021-06-05 18:21:13,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:21:13,695 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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 477 [2021-06-05 18:21:13,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:14,029 INFO L225 Difference]: With dead ends: 254075 [2021-06-05 18:21:14,029 INFO L226 Difference]: Without dead ends: 254075 [2021-06-05 18:21:14,030 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 225.4ms TimeCoverageRelationStatistics Valid=338, Invalid=1068, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:21:14,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254075 states. [2021-06-05 18:21:17,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254075 to 209830. [2021-06-05 18:21:17,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209830 states, 209828 states have (on average 2.692486226814343) internal successors, (564959), 209829 states have internal predecessors, (564959), 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) [2021-06-05 18:21:17,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209830 states to 209830 states and 564959 transitions. [2021-06-05 18:21:17,788 INFO L78 Accepts]: Start accepts. Automaton has 209830 states and 564959 transitions. Word has length 477 [2021-06-05 18:21:17,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:17,788 INFO L482 AbstractCegarLoop]: Abstraction has 209830 states and 564959 transitions. [2021-06-05 18:21:17,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:21:17,788 INFO L276 IsEmpty]: Start isEmpty. Operand 209830 states and 564959 transitions. [2021-06-05 18:21:18,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-06-05 18:21:18,708 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:18,708 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:18,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 18:21:18,913 INFO L430 AbstractCegarLoop]: === Iteration 138 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:18,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:18,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1454310374, now seen corresponding path program 80 times [2021-06-05 18:21:18,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:18,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484295924] [2021-06-05 18:21:18,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:18,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:19,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1409 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-06-05 18:21:19,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:19,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484295924] [2021-06-05 18:21:19,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484295924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:19,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628195394] [2021-06-05 18:21:19,077 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:19,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:21:19,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:19,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:21:19,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:19,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:21:19,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628195394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:19,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:19,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:21:19,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638707352] [2021-06-05 18:21:19,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:21:19,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:19,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:21:19,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:21:19,672 INFO L87 Difference]: Start difference. First operand 209830 states and 564959 transitions. Second operand has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:21:20,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:20,994 INFO L93 Difference]: Finished difference Result 276660 states and 741006 transitions. [2021-06-05 18:21:20,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:21:20,994 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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 477 [2021-06-05 18:21:20,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:21,358 INFO L225 Difference]: With dead ends: 276660 [2021-06-05 18:21:21,358 INFO L226 Difference]: Without dead ends: 276660 [2021-06-05 18:21:21,358 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 258.8ms TimeCoverageRelationStatistics Valid=415, Invalid=1307, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:21:21,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276660 states. [2021-06-05 18:21:24,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276660 to 208750. [2021-06-05 18:21:25,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208750 states, 208748 states have (on average 2.6922653151167917) internal successors, (562005), 208749 states have internal predecessors, (562005), 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) [2021-06-05 18:21:25,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208750 states to 208750 states and 562005 transitions. [2021-06-05 18:21:25,579 INFO L78 Accepts]: Start accepts. Automaton has 208750 states and 562005 transitions. Word has length 477 [2021-06-05 18:21:25,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:25,580 INFO L482 AbstractCegarLoop]: Abstraction has 208750 states and 562005 transitions. [2021-06-05 18:21:25,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:21:25,580 INFO L276 IsEmpty]: Start isEmpty. Operand 208750 states and 562005 transitions. [2021-06-05 18:21:26,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-06-05 18:21:26,442 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:26,442 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:26,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:26,643 INFO L430 AbstractCegarLoop]: === Iteration 139 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:26,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:26,643 INFO L82 PathProgramCache]: Analyzing trace with hash -804665660, now seen corresponding path program 81 times [2021-06-05 18:21:26,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:26,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173032513] [2021-06-05 18:21:26,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:26,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1409 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-06-05 18:21:26,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:26,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173032513] [2021-06-05 18:21:26,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173032513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:26,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791804868] [2021-06-05 18:21:26,808 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:27,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:21:27,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:27,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:21:27,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:27,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:21:27,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791804868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:27,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:27,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:21:27,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167666421] [2021-06-05 18:21:27,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:21:27,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:27,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:21:27,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:21:27,642 INFO L87 Difference]: Start difference. First operand 208750 states and 562005 transitions. Second operand has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:21:29,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:29,116 INFO L93 Difference]: Finished difference Result 330950 states and 887503 transitions. [2021-06-05 18:21:29,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:21:29,116 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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 477 [2021-06-05 18:21:29,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:29,538 INFO L225 Difference]: With dead ends: 330950 [2021-06-05 18:21:29,538 INFO L226 Difference]: Without dead ends: 330950 [2021-06-05 18:21:29,538 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 263.1ms TimeCoverageRelationStatistics Valid=402, Invalid=1238, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:21:29,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330950 states. [2021-06-05 18:21:33,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330950 to 208750. [2021-06-05 18:21:33,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208750 states, 208748 states have (on average 2.6922653151167917) internal successors, (562005), 208749 states have internal predecessors, (562005), 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) [2021-06-05 18:21:34,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208750 states to 208750 states and 562005 transitions. [2021-06-05 18:21:34,204 INFO L78 Accepts]: Start accepts. Automaton has 208750 states and 562005 transitions. Word has length 477 [2021-06-05 18:21:34,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:34,204 INFO L482 AbstractCegarLoop]: Abstraction has 208750 states and 562005 transitions. [2021-06-05 18:21:34,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:21:34,204 INFO L276 IsEmpty]: Start isEmpty. Operand 208750 states and 562005 transitions. [2021-06-05 18:21:34,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-06-05 18:21:34,531 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:34,531 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:34,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 18:21:34,732 INFO L430 AbstractCegarLoop]: === Iteration 140 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:34,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:34,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1929944538, now seen corresponding path program 82 times [2021-06-05 18:21:34,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:34,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891165533] [2021-06-05 18:21:34,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:34,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1409 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-06-05 18:21:34,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:34,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891165533] [2021-06-05 18:21:34,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891165533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:34,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864943195] [2021-06-05 18:21:34,895 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:35,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:21:35,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:35,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:21:35,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:35,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:21:35,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864943195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:35,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:35,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:21:35,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119932966] [2021-06-05 18:21:35,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:21:35,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:35,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:21:35,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:21:35,826 INFO L87 Difference]: Start difference. First operand 208750 states and 562005 transitions. Second operand has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:21:37,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:37,205 INFO L93 Difference]: Finished difference Result 279290 states and 747323 transitions. [2021-06-05 18:21:37,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:21:37,205 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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 477 [2021-06-05 18:21:37,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:37,584 INFO L225 Difference]: With dead ends: 279290 [2021-06-05 18:21:37,584 INFO L226 Difference]: Without dead ends: 279290 [2021-06-05 18:21:37,584 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 250.5ms TimeCoverageRelationStatistics Valid=404, Invalid=1236, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:21:37,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279290 states. [2021-06-05 18:21:41,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279290 to 206590. [2021-06-05 18:21:41,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206590 states, 206588 states have (on average 2.6918165624334423) internal successors, (556097), 206589 states have internal predecessors, (556097), 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) [2021-06-05 18:21:41,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206590 states to 206590 states and 556097 transitions. [2021-06-05 18:21:41,796 INFO L78 Accepts]: Start accepts. Automaton has 206590 states and 556097 transitions. Word has length 477 [2021-06-05 18:21:41,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:41,796 INFO L482 AbstractCegarLoop]: Abstraction has 206590 states and 556097 transitions. [2021-06-05 18:21:41,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:21:41,797 INFO L276 IsEmpty]: Start isEmpty. Operand 206590 states and 556097 transitions. [2021-06-05 18:21:42,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-06-05 18:21:42,073 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:42,073 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:42,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:42,274 INFO L430 AbstractCegarLoop]: === Iteration 141 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:42,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:42,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1073391398, now seen corresponding path program 83 times [2021-06-05 18:21:42,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:42,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142155464] [2021-06-05 18:21:42,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:42,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:42,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1409 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-06-05 18:21:42,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:42,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142155464] [2021-06-05 18:21:42,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142155464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:42,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693250652] [2021-06-05 18:21:42,972 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:43,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:21:43,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:43,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:21:43,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:43,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:21:43,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693250652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:43,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:43,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:21:43,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316422744] [2021-06-05 18:21:43,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:21:43,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:43,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:21:43,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:21:43,836 INFO L87 Difference]: Start difference. First operand 206590 states and 556097 transitions. Second operand has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:21:45,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:45,197 INFO L93 Difference]: Finished difference Result 314015 states and 841405 transitions. [2021-06-05 18:21:45,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:21:45,198 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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 477 [2021-06-05 18:21:45,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:45,635 INFO L225 Difference]: With dead ends: 314015 [2021-06-05 18:21:45,636 INFO L226 Difference]: Without dead ends: 314015 [2021-06-05 18:21:45,636 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 783.2ms TimeCoverageRelationStatistics Valid=401, Invalid=1239, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:21:46,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314015 states. [2021-06-05 18:21:49,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314015 to 209830. [2021-06-05 18:21:49,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209830 states, 209828 states have (on average 2.692486226814343) internal successors, (564959), 209829 states have internal predecessors, (564959), 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) [2021-06-05 18:21:49,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209830 states to 209830 states and 564959 transitions. [2021-06-05 18:21:49,838 INFO L78 Accepts]: Start accepts. Automaton has 209830 states and 564959 transitions. Word has length 477 [2021-06-05 18:21:49,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:49,838 INFO L482 AbstractCegarLoop]: Abstraction has 209830 states and 564959 transitions. [2021-06-05 18:21:49,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:21:49,839 INFO L276 IsEmpty]: Start isEmpty. Operand 209830 states and 564959 transitions. [2021-06-05 18:21:50,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-06-05 18:21:50,109 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:50,110 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:50,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:50,310 INFO L430 AbstractCegarLoop]: === Iteration 142 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:50,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:50,310 INFO L82 PathProgramCache]: Analyzing trace with hash -51887480, now seen corresponding path program 84 times [2021-06-05 18:21:50,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:50,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238503012] [2021-06-05 18:21:50,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:51,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1409 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-06-05 18:21:51,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:51,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238503012] [2021-06-05 18:21:51,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238503012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:51,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959338075] [2021-06-05 18:21:51,022 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:51,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:21:51,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:51,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:21:51,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:21:52,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959338075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:52,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:52,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:21:52,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839913700] [2021-06-05 18:21:52,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:21:52,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:52,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:21:52,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:21:52,056 INFO L87 Difference]: Start difference. First operand 209830 states and 564959 transitions. Second operand has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:21:53,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:53,418 INFO L93 Difference]: Finished difference Result 330220 states and 885201 transitions. [2021-06-05 18:21:53,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:21:53,418 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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 477 [2021-06-05 18:21:53,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:53,855 INFO L225 Difference]: With dead ends: 330220 [2021-06-05 18:21:53,856 INFO L226 Difference]: Without dead ends: 330220 [2021-06-05 18:21:53,856 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 239.9ms TimeCoverageRelationStatistics Valid=391, Invalid=1169, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:21:54,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330220 states. [2021-06-05 18:21:57,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330220 to 206590. [2021-06-05 18:21:57,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206590 states, 206588 states have (on average 2.6918165624334423) internal successors, (556097), 206589 states have internal predecessors, (556097), 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) [2021-06-05 18:21:58,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206590 states to 206590 states and 556097 transitions. [2021-06-05 18:21:58,057 INFO L78 Accepts]: Start accepts. Automaton has 206590 states and 556097 transitions. Word has length 477 [2021-06-05 18:21:58,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:58,058 INFO L482 AbstractCegarLoop]: Abstraction has 206590 states and 556097 transitions. [2021-06-05 18:21:58,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:21:58,058 INFO L276 IsEmpty]: Start isEmpty. Operand 206590 states and 556097 transitions. [2021-06-05 18:21:58,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-06-05 18:21:58,333 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:58,333 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:58,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:58,534 INFO L430 AbstractCegarLoop]: === Iteration 143 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:58,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:58,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1204790298, now seen corresponding path program 85 times [2021-06-05 18:21:58,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:58,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415400507] [2021-06-05 18:21:58,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:58,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1409 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-06-05 18:21:59,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:59,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415400507] [2021-06-05 18:21:59,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415400507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:59,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592540631] [2021-06-05 18:21:59,265 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:59,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:59,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:21:59,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:21:59,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592540631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:59,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:59,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:21:59,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561802021] [2021-06-05 18:21:59,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:21:59,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:59,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:21:59,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:21:59,886 INFO L87 Difference]: Start difference. First operand 206590 states and 556097 transitions. Second operand has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:22:01,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:01,111 INFO L93 Difference]: Finished difference Result 269815 states and 721438 transitions. [2021-06-05 18:22:01,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:22:01,112 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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 477 [2021-06-05 18:22:01,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:01,494 INFO L225 Difference]: With dead ends: 269815 [2021-06-05 18:22:01,494 INFO L226 Difference]: Without dead ends: 269815 [2021-06-05 18:22:01,495 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 224.4ms TimeCoverageRelationStatistics Valid=393, Invalid=1167, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:22:01,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269815 states. [2021-06-05 18:22:04,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269815 to 211090. [2021-06-05 18:22:05,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211090 states, 211088 states have (on average 2.6920147047676797) internal successors, (568252), 211089 states have internal predecessors, (568252), 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) [2021-06-05 18:22:05,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211090 states to 211090 states and 568252 transitions. [2021-06-05 18:22:05,600 INFO L78 Accepts]: Start accepts. Automaton has 211090 states and 568252 transitions. Word has length 477 [2021-06-05 18:22:05,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:05,601 INFO L482 AbstractCegarLoop]: Abstraction has 211090 states and 568252 transitions. [2021-06-05 18:22:05,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:22:05,601 INFO L276 IsEmpty]: Start isEmpty. Operand 211090 states and 568252 transitions. [2021-06-05 18:22:05,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-06-05 18:22:05,889 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:05,889 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:06,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:06,091 INFO L430 AbstractCegarLoop]: === Iteration 144 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:06,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:06,091 INFO L82 PathProgramCache]: Analyzing trace with hash 462510980, now seen corresponding path program 86 times [2021-06-05 18:22:06,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:06,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923032011] [2021-06-05 18:22:06,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:06,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:06,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1409 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-06-05 18:22:06,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:06,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923032011] [2021-06-05 18:22:06,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923032011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:06,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637521064] [2021-06-05 18:22:06,282 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:06,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:22:06,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:06,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:06,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:07,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:22:07,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637521064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:07,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:07,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:22:07,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097263774] [2021-06-05 18:22:07,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:22:07,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:07,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:22:07,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:22:07,333 INFO L87 Difference]: Start difference. First operand 211090 states and 568252 transitions. Second operand has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:22:08,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:08,378 INFO L93 Difference]: Finished difference Result 282015 states and 754629 transitions. [2021-06-05 18:22:08,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:22:08,379 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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 477 [2021-06-05 18:22:08,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:08,767 INFO L225 Difference]: With dead ends: 282015 [2021-06-05 18:22:08,768 INFO L226 Difference]: Without dead ends: 282015 [2021-06-05 18:22:08,768 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 269.8ms TimeCoverageRelationStatistics Valid=417, Invalid=1305, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:22:09,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282015 states. [2021-06-05 18:22:12,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282015 to 214330. [2021-06-05 18:22:12,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214330 states, 214328 states have (on average 2.6926673136501065) internal successors, (577114), 214329 states have internal predecessors, (577114), 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) [2021-06-05 18:22:13,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214330 states to 214330 states and 577114 transitions. [2021-06-05 18:22:13,283 INFO L78 Accepts]: Start accepts. Automaton has 214330 states and 577114 transitions. Word has length 477 [2021-06-05 18:22:13,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:13,283 INFO L482 AbstractCegarLoop]: Abstraction has 214330 states and 577114 transitions. [2021-06-05 18:22:13,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:22:13,284 INFO L276 IsEmpty]: Start isEmpty. Operand 214330 states and 577114 transitions. [2021-06-05 18:22:13,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-06-05 18:22:13,542 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:13,542 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:13,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:13,743 INFO L430 AbstractCegarLoop]: === Iteration 145 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:13,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:13,743 INFO L82 PathProgramCache]: Analyzing trace with hash -662767898, now seen corresponding path program 87 times [2021-06-05 18:22:13,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:13,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531617121] [2021-06-05 18:22:13,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:13,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1409 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-06-05 18:22:13,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:13,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531617121] [2021-06-05 18:22:13,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531617121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:13,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105742625] [2021-06-05 18:22:13,907 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:14,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:22:14,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:14,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:14,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:22:14,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105742625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:14,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:14,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:22:14,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118498248] [2021-06-05 18:22:14,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:22:14,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:14,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:22:14,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:22:14,789 INFO L87 Difference]: Start difference. First operand 214330 states and 577114 transitions. Second operand has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:22:16,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:16,184 INFO L93 Difference]: Finished difference Result 298005 states and 797499 transitions. [2021-06-05 18:22:16,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:22:16,185 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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 477 [2021-06-05 18:22:16,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:16,588 INFO L225 Difference]: With dead ends: 298005 [2021-06-05 18:22:16,588 INFO L226 Difference]: Without dead ends: 298005 [2021-06-05 18:22:16,588 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 247.2ms TimeCoverageRelationStatistics Valid=406, Invalid=1234, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:22:17,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298005 states. [2021-06-05 18:22:19,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298005 to 213250. [2021-06-05 18:22:20,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213250 states, 213248 states have (on average 2.692451980792317) internal successors, (574160), 213249 states have internal predecessors, (574160), 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) [2021-06-05 18:22:21,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213250 states to 213250 states and 574160 transitions. [2021-06-05 18:22:21,124 INFO L78 Accepts]: Start accepts. Automaton has 213250 states and 574160 transitions. Word has length 477 [2021-06-05 18:22:21,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:21,124 INFO L482 AbstractCegarLoop]: Abstraction has 213250 states and 574160 transitions. [2021-06-05 18:22:21,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:22:21,124 INFO L276 IsEmpty]: Start isEmpty. Operand 213250 states and 574160 transitions. [2021-06-05 18:22:21,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-06-05 18:22:21,386 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:21,386 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:21,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 18:22:21,587 INFO L430 AbstractCegarLoop]: === Iteration 146 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:21,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:21,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1815670716, now seen corresponding path program 88 times [2021-06-05 18:22:21,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:21,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885197419] [2021-06-05 18:22:21,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:21,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1409 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-06-05 18:22:21,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:21,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885197419] [2021-06-05 18:22:21,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885197419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:21,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807698451] [2021-06-05 18:22:21,751 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:22,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:22:22,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:22,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:22,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:22,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:22:22,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807698451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:22,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:22,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:22:22,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721038661] [2021-06-05 18:22:22,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:22:22,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:22,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:22:22,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:22:22,740 INFO L87 Difference]: Start difference. First operand 213250 states and 574160 transitions. Second operand has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:22:24,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:24,059 INFO L93 Difference]: Finished difference Result 297525 states and 796289 transitions. [2021-06-05 18:22:24,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:22:24,060 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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 477 [2021-06-05 18:22:24,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:24,462 INFO L225 Difference]: With dead ends: 297525 [2021-06-05 18:22:24,462 INFO L226 Difference]: Without dead ends: 297525 [2021-06-05 18:22:24,462 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 238.7ms TimeCoverageRelationStatistics Valid=395, Invalid=1165, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:22:24,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297525 states. [2021-06-05 18:22:28,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297525 to 216890. [2021-06-05 18:22:28,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216890 states, 216888 states have (on average 2.6926432075541293) internal successors, (584002), 216889 states have internal predecessors, (584002), 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) [2021-06-05 18:22:29,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216890 states to 216890 states and 584002 transitions. [2021-06-05 18:22:29,283 INFO L78 Accepts]: Start accepts. Automaton has 216890 states and 584002 transitions. Word has length 477 [2021-06-05 18:22:29,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:29,284 INFO L482 AbstractCegarLoop]: Abstraction has 216890 states and 584002 transitions. [2021-06-05 18:22:29,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:22:29,284 INFO L276 IsEmpty]: Start isEmpty. Operand 216890 states and 584002 transitions. [2021-06-05 18:22:29,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-06-05 18:22:29,642 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:29,643 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:29,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 18:22:29,843 INFO L430 AbstractCegarLoop]: === Iteration 147 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:29,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:29,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1355347418, now seen corresponding path program 89 times [2021-06-05 18:22:29,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:29,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500017051] [2021-06-05 18:22:29,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:29,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:30,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1409 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-06-05 18:22:30,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:30,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500017051] [2021-06-05 18:22:30,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500017051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:30,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869712761] [2021-06-05 18:22:30,012 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:30,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:22:30,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:30,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:30,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:30,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:22:30,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869712761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:30,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:30,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:22:30,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124493489] [2021-06-05 18:22:30,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:22:30,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:30,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:22:30,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:22:30,903 INFO L87 Difference]: Start difference. First operand 216890 states and 584002 transitions. Second operand has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:22:32,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:32,142 INFO L93 Difference]: Finished difference Result 254575 states and 679273 transitions. [2021-06-05 18:22:32,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:22:32,142 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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 477 [2021-06-05 18:22:32,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:32,453 INFO L225 Difference]: With dead ends: 254575 [2021-06-05 18:22:32,453 INFO L226 Difference]: Without dead ends: 254575 [2021-06-05 18:22:32,453 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 239.2ms TimeCoverageRelationStatistics Valid=397, Invalid=1163, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:22:32,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254575 states. [2021-06-05 18:22:35,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254575 to 221390. [2021-06-05 18:22:35,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221390 states, 221388 states have (on average 2.6928153287441052) internal successors, (596157), 221389 states have internal predecessors, (596157), 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) [2021-06-05 18:22:36,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221390 states to 221390 states and 596157 transitions. [2021-06-05 18:22:36,208 INFO L78 Accepts]: Start accepts. Automaton has 221390 states and 596157 transitions. Word has length 477 [2021-06-05 18:22:36,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:36,208 INFO L482 AbstractCegarLoop]: Abstraction has 221390 states and 596157 transitions. [2021-06-05 18:22:36,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-06-05 18:22:36,209 INFO L276 IsEmpty]: Start isEmpty. Operand 221390 states and 596157 transitions. [2021-06-05 18:22:36,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2021-06-05 18:22:36,496 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:36,497 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:36,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 18:22:36,697 INFO L430 AbstractCegarLoop]: === Iteration 148 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:36,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:36,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1503648523, now seen corresponding path program 90 times [2021-06-05 18:22:36,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:36,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697582804] [2021-06-05 18:22:36,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:36,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 30 proven. 1686 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:22:36,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:36,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697582804] [2021-06-05 18:22:36,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697582804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:36,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458571877] [2021-06-05 18:22:36,879 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:37,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 18:22:37,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:37,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:37,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:38,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 30 proven. 1686 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:22:38,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458571877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:38,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:38,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:22:38,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396141407] [2021-06-05 18:22:38,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:22:38,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:38,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:22:38,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:22:38,433 INFO L87 Difference]: Start difference. First operand 221390 states and 596157 transitions. Second operand has 23 states, 23 states have (on average 19.956521739130434) internal successors, (459), 23 states have internal predecessors, (459), 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) [2021-06-05 18:22:39,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:39,724 INFO L93 Difference]: Finished difference Result 265730 states and 710941 transitions. [2021-06-05 18:22:39,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:22:39,725 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.956521739130434) internal successors, (459), 23 states have internal predecessors, (459), 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 478 [2021-06-05 18:22:39,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:40,045 INFO L225 Difference]: With dead ends: 265730 [2021-06-05 18:22:40,045 INFO L226 Difference]: Without dead ends: 265730 [2021-06-05 18:22:40,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 324.5ms TimeCoverageRelationStatistics Valid=540, Invalid=1716, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:22:40,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265730 states. [2021-06-05 18:22:43,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265730 to 219570. [2021-06-05 18:22:43,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219570 states, 219568 states have (on average 2.6927238941922322) internal successors, (591236), 219569 states have internal predecessors, (591236), 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) [2021-06-05 18:22:44,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219570 states to 219570 states and 591236 transitions. [2021-06-05 18:22:44,085 INFO L78 Accepts]: Start accepts. Automaton has 219570 states and 591236 transitions. Word has length 478 [2021-06-05 18:22:44,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:44,085 INFO L482 AbstractCegarLoop]: Abstraction has 219570 states and 591236 transitions. [2021-06-05 18:22:44,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.956521739130434) internal successors, (459), 23 states have internal predecessors, (459), 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) [2021-06-05 18:22:44,086 INFO L276 IsEmpty]: Start isEmpty. Operand 219570 states and 591236 transitions. [2021-06-05 18:22:44,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2021-06-05 18:22:44,381 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:44,381 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:44,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 18:22:44,582 INFO L430 AbstractCegarLoop]: === Iteration 149 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:44,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:44,582 INFO L82 PathProgramCache]: Analyzing trace with hash 2034265709, now seen corresponding path program 91 times [2021-06-05 18:22:44,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:44,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232018831] [2021-06-05 18:22:44,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:44,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 30 proven. 1686 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:22:44,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:44,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232018831] [2021-06-05 18:22:44,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232018831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:44,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140880229] [2021-06-05 18:22:44,758 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:44,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:44,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:44,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:45,601 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:22:45,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 30 proven. 1686 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:22:45,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140880229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:45,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:45,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:22:45,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826832495] [2021-06-05 18:22:45,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:22:45,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:45,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:22:45,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:22:45,839 INFO L87 Difference]: Start difference. First operand 219570 states and 591236 transitions. Second operand has 23 states, 23 states have (on average 19.956521739130434) internal successors, (459), 23 states have internal predecessors, (459), 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) [2021-06-05 18:22:46,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:46,931 INFO L93 Difference]: Finished difference Result 320365 states and 858833 transitions. [2021-06-05 18:22:46,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:22:46,931 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.956521739130434) internal successors, (459), 23 states have internal predecessors, (459), 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 478 [2021-06-05 18:22:46,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:47,674 INFO L225 Difference]: With dead ends: 320365 [2021-06-05 18:22:47,674 INFO L226 Difference]: Without dead ends: 320365 [2021-06-05 18:22:47,674 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 312.8ms TimeCoverageRelationStatistics Valid=526, Invalid=1636, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:22:48,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320365 states. [2021-06-05 18:22:51,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320365 to 219570. [2021-06-05 18:22:51,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219570 states, 219568 states have (on average 2.6927238941922322) internal successors, (591236), 219569 states have internal predecessors, (591236), 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) [2021-06-05 18:22:51,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219570 states to 219570 states and 591236 transitions. [2021-06-05 18:22:51,944 INFO L78 Accepts]: Start accepts. Automaton has 219570 states and 591236 transitions. Word has length 478 [2021-06-05 18:22:51,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:51,945 INFO L482 AbstractCegarLoop]: Abstraction has 219570 states and 591236 transitions. [2021-06-05 18:22:51,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.956521739130434) internal successors, (459), 23 states have internal predecessors, (459), 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) [2021-06-05 18:22:51,945 INFO L276 IsEmpty]: Start isEmpty. Operand 219570 states and 591236 transitions. [2021-06-05 18:22:52,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2021-06-05 18:22:52,236 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:52,236 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:52,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:52,437 INFO L430 AbstractCegarLoop]: === Iteration 150 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:52,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:52,437 INFO L82 PathProgramCache]: Analyzing trace with hash 908986831, now seen corresponding path program 92 times [2021-06-05 18:22:52,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:52,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11337803] [2021-06-05 18:22:52,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:52,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:52,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 30 proven. 1686 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:22:52,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:52,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11337803] [2021-06-05 18:22:52,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11337803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:52,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803094902] [2021-06-05 18:22:52,613 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:53,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:22:53,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:53,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:53,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:53,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 30 proven. 1686 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:22:53,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803094902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:53,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:53,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:22:53,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678972393] [2021-06-05 18:22:53,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:22:53,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:53,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:22:53,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:22:53,769 INFO L87 Difference]: Start difference. First operand 219570 states and 591236 transitions. Second operand has 23 states, 23 states have (on average 19.956521739130434) internal successors, (459), 23 states have internal predecessors, (459), 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) [2021-06-05 18:22:55,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:55,068 INFO L93 Difference]: Finished difference Result 269310 states and 720204 transitions. [2021-06-05 18:22:55,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:22:55,069 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.956521739130434) internal successors, (459), 23 states have internal predecessors, (459), 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 478 [2021-06-05 18:22:55,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:55,403 INFO L225 Difference]: With dead ends: 269310 [2021-06-05 18:22:55,403 INFO L226 Difference]: Without dead ends: 269310 [2021-06-05 18:22:55,403 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 317.1ms TimeCoverageRelationStatistics Valid=528, Invalid=1634, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:22:55,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269310 states. [2021-06-05 18:22:58,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269310 to 216670. [2021-06-05 18:22:59,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216670 states, 216668 states have (on average 2.69241881588421) internal successors, (583361), 216669 states have internal predecessors, (583361), 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) [2021-06-05 18:22:59,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216670 states to 216670 states and 583361 transitions. [2021-06-05 18:22:59,442 INFO L78 Accepts]: Start accepts. Automaton has 216670 states and 583361 transitions. Word has length 478 [2021-06-05 18:22:59,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:59,442 INFO L482 AbstractCegarLoop]: Abstraction has 216670 states and 583361 transitions. [2021-06-05 18:22:59,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.956521739130434) internal successors, (459), 23 states have internal predecessors, (459), 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) [2021-06-05 18:22:59,442 INFO L276 IsEmpty]: Start isEmpty. Operand 216670 states and 583361 transitions. [2021-06-05 18:22:59,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2021-06-05 18:22:59,721 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:59,721 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:59,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 18:22:59,925 INFO L430 AbstractCegarLoop]: === Iteration 151 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:59,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:59,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1058402805, now seen corresponding path program 93 times [2021-06-05 18:22:59,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:59,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265329685] [2021-06-05 18:22:59,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:59,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:00,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 30 proven. 1686 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:23:00,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:00,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265329685] [2021-06-05 18:23:00,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265329685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:00,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125591346] [2021-06-05 18:23:00,107 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:00,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 18:23:00,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:00,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:23:00,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:01,421 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:23:01,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 30 proven. 1686 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:23:01,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125591346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:01,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:01,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:23:01,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244194673] [2021-06-05 18:23:01,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:23:01,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:01,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:23:01,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:23:01,469 INFO L87 Difference]: Start difference. First operand 216670 states and 583361 transitions. Second operand has 23 states, 23 states have (on average 19.956521739130434) internal successors, (459), 23 states have internal predecessors, (459), 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) [2021-06-05 18:23:02,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:02,558 INFO L93 Difference]: Finished difference Result 339595 states and 910354 transitions. [2021-06-05 18:23:02,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:23:02,559 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.956521739130434) internal successors, (459), 23 states have internal predecessors, (459), 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 478 [2021-06-05 18:23:02,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:03,348 INFO L225 Difference]: With dead ends: 339595 [2021-06-05 18:23:03,348 INFO L226 Difference]: Without dead ends: 339595 [2021-06-05 18:23:03,348 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 315.9ms TimeCoverageRelationStatistics Valid=525, Invalid=1637, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:23:03,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339595 states. [2021-06-05 18:23:06,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339595 to 216670. [2021-06-05 18:23:07,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216670 states, 216668 states have (on average 2.69241881588421) internal successors, (583361), 216669 states have internal predecessors, (583361), 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) [2021-06-05 18:23:07,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216670 states to 216670 states and 583361 transitions. [2021-06-05 18:23:07,590 INFO L78 Accepts]: Start accepts. Automaton has 216670 states and 583361 transitions. Word has length 478 [2021-06-05 18:23:07,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:07,591 INFO L482 AbstractCegarLoop]: Abstraction has 216670 states and 583361 transitions. [2021-06-05 18:23:07,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.956521739130434) internal successors, (459), 23 states have internal predecessors, (459), 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) [2021-06-05 18:23:07,591 INFO L276 IsEmpty]: Start isEmpty. Operand 216670 states and 583361 transitions. [2021-06-05 18:23:07,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2021-06-05 18:23:07,888 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:07,888 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:08,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:08,088 INFO L430 AbstractCegarLoop]: === Iteration 152 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:08,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:08,089 INFO L82 PathProgramCache]: Analyzing trace with hash -66876073, now seen corresponding path program 94 times [2021-06-05 18:23:08,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:08,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293137034] [2021-06-05 18:23:08,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:08,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:08,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 30 proven. 1686 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:23:08,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:08,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293137034] [2021-06-05 18:23:08,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293137034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:08,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341126179] [2021-06-05 18:23:08,836 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:09,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:23:09,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:09,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:23:09,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:10,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 30 proven. 1686 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:23:10,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341126179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:10,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:10,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:23:10,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679390342] [2021-06-05 18:23:10,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:23:10,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:10,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:23:10,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:23:10,084 INFO L87 Difference]: Start difference. First operand 216670 states and 583361 transitions. Second operand has 23 states, 23 states have (on average 19.956521739130434) internal successors, (459), 23 states have internal predecessors, (459), 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) [2021-06-05 18:23:11,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:11,444 INFO L93 Difference]: Finished difference Result 344345 states and 923879 transitions. [2021-06-05 18:23:11,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:23:11,444 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.956521739130434) internal successors, (459), 23 states have internal predecessors, (459), 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 478 [2021-06-05 18:23:11,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:11,897 INFO L225 Difference]: With dead ends: 344345 [2021-06-05 18:23:11,897 INFO L226 Difference]: Without dead ends: 344345 [2021-06-05 18:23:11,897 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 874.7ms TimeCoverageRelationStatistics Valid=514, Invalid=1556, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:23:12,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344345 states. [2021-06-05 18:23:15,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344345 to 215590. [2021-06-05 18:23:15,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215590 states, 215588 states have (on average 2.6922045753938066) internal successors, (580407), 215589 states have internal predecessors, (580407), 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) [2021-06-05 18:23:16,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215590 states to 215590 states and 580407 transitions. [2021-06-05 18:23:16,686 INFO L78 Accepts]: Start accepts. Automaton has 215590 states and 580407 transitions. Word has length 478 [2021-06-05 18:23:16,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:16,687 INFO L482 AbstractCegarLoop]: Abstraction has 215590 states and 580407 transitions. [2021-06-05 18:23:16,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.956521739130434) internal successors, (459), 23 states have internal predecessors, (459), 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) [2021-06-05 18:23:16,687 INFO L276 IsEmpty]: Start isEmpty. Operand 215590 states and 580407 transitions. [2021-06-05 18:23:16,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2021-06-05 18:23:16,952 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:16,952 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:17,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:17,152 INFO L430 AbstractCegarLoop]: === Iteration 153 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:17,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:17,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1219778891, now seen corresponding path program 95 times [2021-06-05 18:23:17,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:17,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585352149] [2021-06-05 18:23:17,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:17,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 30 proven. 1686 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:23:17,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:17,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585352149] [2021-06-05 18:23:17,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585352149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:17,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576609603] [2021-06-05 18:23:17,340 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:17,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 18:23:17,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:17,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:23:17,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:18,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 30 proven. 1686 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:23:18,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576609603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:18,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:18,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:23:18,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835336543] [2021-06-05 18:23:18,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:23:18,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:18,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:23:18,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:23:18,088 INFO L87 Difference]: Start difference. First operand 215590 states and 580407 transitions. Second operand has 23 states, 23 states have (on average 19.956521739130434) internal successors, (459), 23 states have internal predecessors, (459), 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) [2021-06-05 18:23:19,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:19,466 INFO L93 Difference]: Finished difference Result 268960 states and 718866 transitions. [2021-06-05 18:23:19,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:23:19,466 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.956521739130434) internal successors, (459), 23 states have internal predecessors, (459), 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 478 [2021-06-05 18:23:19,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. Received shutdown request... [2021-06-05 18:23:19,855 INFO L225 Difference]: With dead ends: 268960 [2021-06-05 18:23:19,855 INFO L226 Difference]: Without dead ends: 268960 [2021-06-05 18:23:19,855 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 322.7ms TimeCoverageRelationStatistics Valid=516, Invalid=1554, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:23:20,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268960 states. [2021-06-05 18:23:20,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:20,425 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 18:23:20,425 INFO L301 ceAbstractionStarter]: Result for error location t1Thread1of1ForFork1 was TIMEOUT (1/5) [2021-06-05 18:23:20,427 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-05 18:23:20,427 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 18:23:20,427 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 18:23:20,427 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 18:23:20,427 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 18:23:20,427 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 18:23:20,427 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 18:23:20,428 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 18:23:20,428 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 18:23:20,429 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 152 places, 157 transitions, 336 flow [2021-06-05 18:23:20,429 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 18:23:20,429 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was TIMEOUT (2/5) [2021-06-05 18:23:20,430 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 18:23:20,430 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 18:23:20,430 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 18:23:20,430 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 18:23:20,430 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 18:23:20,430 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 18:23:20,430 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 18:23:20,430 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 18:23:20,430 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == t2Thread1of1ForFork0======== [2021-06-05 18:23:20,432 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 152 places, 157 transitions, 336 flow [2021-06-05 18:23:20,432 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 18:23:20,432 INFO L301 ceAbstractionStarter]: Result for error location t2Thread1of1ForFork0 was TIMEOUT (3/5) [2021-06-05 18:23:20,432 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 18:23:20,432 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 18:23:20,432 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 18:23:20,432 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 18:23:20,432 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 18:23:20,432 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 18:23:20,432 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 18:23:20,432 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 18:23:20,432 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == t1======== [2021-06-05 18:23:20,435 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 152 places, 157 transitions, 336 flow [2021-06-05 18:23:20,435 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 18:23:20,436 INFO L301 ceAbstractionStarter]: Result for error location t1 was TIMEOUT (4/5) [2021-06-05 18:23:20,436 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 18:23:20,436 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 18:23:20,436 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 18:23:20,436 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 18:23:20,436 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 18:23:20,437 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 18:23:20,437 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 18:23:20,437 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 18:23:20,437 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == t2======== [2021-06-05 18:23:20,437 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 152 places, 157 transitions, 336 flow [2021-06-05 18:23:20,437 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 18:23:20,437 INFO L301 ceAbstractionStarter]: Result for error location t2 was TIMEOUT (5/5) [2021-06-05 18:23:20,438 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 18:23:20,439 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 18:23:20,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 06:23:20 BasicIcfg [2021-06-05 18:23:20,439 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 18:23:20,440 INFO L168 Benchmark]: Toolchain (without parser) took 703581.97 ms. Allocated memory was 364.9 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 326.5 MB in the beginning and 13.0 GB in the end (delta: -12.7 GB). Peak memory consumption was 3.0 GB. Max. memory is 16.0 GB. [2021-06-05 18:23:20,440 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 364.9 MB. Free memory is still 344.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 18:23:20,440 INFO L168 Benchmark]: CACSL2BoogieTranslator took 533.51 ms. Allocated memory is still 364.9 MB. Free memory was 326.3 MB in the beginning and 303.3 MB in the end (delta: 23.0 MB). Peak memory consumption was 25.9 MB. Max. memory is 16.0 GB. [2021-06-05 18:23:20,440 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.67 ms. Allocated memory is still 364.9 MB. Free memory was 302.2 MB in the beginning and 300.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 18:23:20,440 INFO L168 Benchmark]: Boogie Preprocessor took 34.11 ms. Allocated memory is still 364.9 MB. Free memory was 300.1 MB in the beginning and 298.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 18:23:20,440 INFO L168 Benchmark]: RCFGBuilder took 499.54 ms. Allocated memory is still 364.9 MB. Free memory was 298.0 MB in the beginning and 263.4 MB in the end (delta: 34.6 MB). Peak memory consumption was 35.7 MB. Max. memory is 16.0 GB. [2021-06-05 18:23:20,440 INFO L168 Benchmark]: TraceAbstraction took 702433.85 ms. Allocated memory was 364.9 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 263.4 MB in the beginning and 13.0 GB in the end (delta: -12.7 GB). Peak memory consumption was 2.9 GB. Max. memory is 16.0 GB. [2021-06-05 18:23:20,440 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 364.9 MB. Free memory is still 344.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 533.51 ms. Allocated memory is still 364.9 MB. Free memory was 326.3 MB in the beginning and 303.3 MB in the end (delta: 23.0 MB). Peak memory consumption was 25.9 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 60.67 ms. Allocated memory is still 364.9 MB. Free memory was 302.2 MB in the beginning and 300.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 34.11 ms. Allocated memory is still 364.9 MB. Free memory was 300.1 MB in the beginning and 298.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 499.54 ms. Allocated memory is still 364.9 MB. Free memory was 298.0 MB in the beginning and 263.4 MB in the end (delta: 34.6 MB). Peak memory consumption was 35.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 702433.85 ms. Allocated memory was 364.9 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 263.4 MB in the beginning and 13.0 GB in the end (delta: -12.7 GB). Peak memory consumption was 2.9 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 941]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 941]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while BasicCegarLoop was constructing initial abstraction,while PetriNet2FiniteAutomaton was constructing automaton for Petri net that has has 152 places, 157 transitions, 336 flow. Already constructed 2 states. Currently 1 states in worklist.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: t1Thread1of1ForFork1 with 1 thread instances CFG has 5 procedures, 244 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 702325.9ms, OverallIterations: 153, TraceHistogramMax: 13, EmptinessCheckTime: 28970.7ms, AutomataDifference: 151893.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 282.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 23692 SDtfs, 236825 SDslu, 221408 SDs, 0 SdLazy, 20047 SolverSat, 3756 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8942.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 64732 GetRequests, 59530 SyntacticMatches, 2 SemanticMatches, 5200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39790 ImplicationChecksByTransitivity, 38381.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=221390occurred in iteration=147, InterpolantAutomatonStates: 4070, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 341529.6ms AutomataMinimizationTime, 153 MinimizatonAttempts, 5985017 StatesRemovedByMinimization, 152 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 5079.2ms SsaConstructionTime, 38285.4ms SatisfiabilityAnalysisTime, 96421.5ms InterpolantComputationTime, 118009 NumberOfCodeBlocks, 117831 NumberOfCodeBlocksAsserted, 942 NumberOfCheckSat, 117707 ConstructedInterpolants, 0 QuantifiedInterpolants, 342982 SizeOfPredicates, 2862 NumberOfNonLiveVariables, 112936 ConjunctsInSsa, 3174 ConjunctsInUnsatCore, 302 InterpolantComputations, 5 PerfectInterpolantSequences, 24887/351470 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 - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 244 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 2.2ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: t2Thread1of1ForFork0 with 1 thread instances CFG has 5 procedures, 244 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 1.8ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: t1 with 1 thread instances CFG has 5 procedures, 244 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 3.4ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 2.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: t2 with 1 thread instances CFG has 5 procedures, 244 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 1.1ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 0.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown