/usr/bin/java -Xmx8000000000 -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_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 18:21:05,909 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 18:21:05,911 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 18:21:05,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-13 18:21:05,936 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-13 18:21:05,937 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-13 18:21:05,938 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-13 18:21:05,940 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-13 18:21:05,941 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-13 18:21:05,942 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-13 18:21:05,942 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-13 18:21:05,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-13 18:21:05,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-13 18:21:05,945 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-13 18:21:05,946 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-13 18:21:05,946 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-13 18:21:05,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-13 18:21:05,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-13 18:21:05,949 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-13 18:21:05,951 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-13 18:21:05,953 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-13 18:21:05,954 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-13 18:21:05,955 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-13 18:21:05,956 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-13 18:21:05,958 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-07-13 18:21:05,961 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-13 18:21:05,962 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-13 18:21:05,963 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-13 18:21:05,963 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-13 18:21:05,964 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-13 18:21:05,964 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-13 18:21:05,965 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-13 18:21:05,965 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-13 18:21:05,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-13 18:21:05,966 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-13 18:21:05,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-13 18:21:05,968 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 [2021-07-13 18:21:06,008 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 18:21:06,008 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 18:21:06,009 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 18:21:06,009 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 18:21:06,010 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 18:21:06,010 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 18:21:06,010 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 18:21:06,010 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 18:21:06,011 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 18:21:06,011 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 18:21:06,011 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 18:21:06,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 18:21:06,011 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 18:21:06,011 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 18:21:06,011 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 18:21:06,011 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 18:21:06,012 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 18:21:06,012 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 18:21:06,012 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 18:21:06,012 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 18:21:06,012 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 18:21:06,012 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 18:21:06,012 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 18:21:06,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 18:21:06,013 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 18:21:06,013 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 18:21:06,013 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 18:21:06,013 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 18:21:06,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 18:21:06,013 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 18:21:06,013 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 18:21:06,014 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 18:21:06,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 18:21:06,344 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 18:21:06,347 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 18:21:06,348 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-13 18:21:06,350 INFO L275 PluginConnector]: CDTParser initialized [2021-07-13 18:21:06,351 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longer-1.i [2021-07-13 18:21:06,419 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7b9312e6/924d9b64569e4fcfbac066ad46fc6d57/FLAG7dd8a2b56 [2021-07-13 18:21:07,014 INFO L306 CDTParser]: Found 1 translation units. [2021-07-13 18:21:07,015 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-1.i [2021-07-13 18:21:07,038 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7b9312e6/924d9b64569e4fcfbac066ad46fc6d57/FLAG7dd8a2b56 [2021-07-13 18:21:07,381 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7b9312e6/924d9b64569e4fcfbac066ad46fc6d57 [2021-07-13 18:21:07,385 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 18:21:07,387 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-07-13 18:21:07,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-13 18:21:07,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-13 18:21:07,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-13 18:21:07,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:21:07" (1/1) ... [2021-07-13 18:21:07,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22b31fd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:07, skipping insertion in model container [2021-07-13 18:21:07,396 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:21:07" (1/1) ... [2021-07-13 18:21:07,405 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-13 18:21:07,448 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-13 18:21:07,770 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_longer-1.i[41527,41540] [2021-07-13 18:21:07,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-13 18:21:07,805 INFO L203 MainTranslator]: Completed pre-run [2021-07-13 18:21:07,839 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_longer-1.i[41527,41540] [2021-07-13 18:21:07,848 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-13 18:21:07,896 INFO L208 MainTranslator]: Completed translation [2021-07-13 18:21:07,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:07 WrapperNode [2021-07-13 18:21:07,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-13 18:21:07,898 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 18:21:07,898 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 18:21:07,898 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 18:21:07,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:07" (1/1) ... [2021-07-13 18:21:07,921 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:07" (1/1) ... [2021-07-13 18:21:07,943 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 18:21:07,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 18:21:07,944 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 18:21:07,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 18:21:07,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:07" (1/1) ... [2021-07-13 18:21:07,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:07" (1/1) ... [2021-07-13 18:21:07,955 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:07" (1/1) ... [2021-07-13 18:21:07,955 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:07" (1/1) ... [2021-07-13 18:21:07,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:07" (1/1) ... [2021-07-13 18:21:07,966 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:07" (1/1) ... [2021-07-13 18:21:07,968 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:07" (1/1) ... [2021-07-13 18:21:07,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 18:21:07,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 18:21:07,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 18:21:07,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 18:21:07,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:07" (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 [2021-07-13 18:21:08,057 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-07-13 18:21:08,058 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-07-13 18:21:08,058 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-07-13 18:21:08,059 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-07-13 18:21:08,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-13 18:21:08,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-13 18:21:08,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-07-13 18:21:08,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-13 18:21:08,060 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2021-07-13 18:21:08,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-13 18:21:08,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 18:21:08,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 18:21:08,062 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 18:21:08,622 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 18:21:08,622 INFO L299 CfgBuilder]: Removed 26 assume(true) statements. [2021-07-13 18:21:08,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:21:08 BoogieIcfgContainer [2021-07-13 18:21:08,624 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 18:21:08,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 18:21:08,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 18:21:08,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 18:21:08,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 06:21:07" (1/3) ... [2021-07-13 18:21:08,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e56f348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:21:08, skipping insertion in model container [2021-07-13 18:21:08,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:07" (2/3) ... [2021-07-13 18:21:08,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e56f348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:21:08, skipping insertion in model container [2021-07-13 18:21:08,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:21:08" (3/3) ... [2021-07-13 18:21:08,634 INFO L111 eAbstractionObserver]: Analyzing ICFG stack_longer-1.i [2021-07-13 18:21:08,638 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 18:21:08,638 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 18:21:08,639 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-07-13 18:21:08,639 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 18:21:08,670 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,670 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,670 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,670 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,671 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,671 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,671 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,671 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,672 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,672 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,672 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,672 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,672 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,672 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,673 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,673 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,673 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,673 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,673 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,673 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,673 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,674 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,674 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,674 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,674 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,674 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,674 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,675 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,675 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,675 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,675 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,675 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,675 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,676 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,676 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,676 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,676 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,676 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,676 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,677 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,677 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,677 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,677 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,677 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,677 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,678 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,678 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,678 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,678 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,678 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,678 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,678 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,679 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,679 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,679 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,679 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,679 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,679 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,680 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,680 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,680 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,680 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,680 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,680 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,680 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,680 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,681 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,681 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,681 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,681 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,681 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,681 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,681 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,682 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,682 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,682 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,682 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,682 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,682 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,683 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,683 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,683 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,683 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,683 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,683 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,683 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,684 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,684 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,684 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,684 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,684 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,684 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,684 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,685 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,685 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,685 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,685 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,685 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,685 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,686 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,686 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,686 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,686 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,686 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,686 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,686 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,687 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,687 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,687 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,687 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,687 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,687 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,687 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,688 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,688 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,688 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,688 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,688 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,688 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,689 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,689 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,689 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,689 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,689 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,689 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,689 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,690 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,690 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,690 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,690 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,690 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,690 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,690 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,690 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,691 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,691 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,692 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,692 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,692 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,692 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,692 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,692 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,692 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,693 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,693 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,693 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,693 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,693 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,693 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,693 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,694 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,694 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,694 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,694 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,694 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,694 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,694 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,695 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,695 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,695 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,695 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,695 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,695 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,696 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,696 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,696 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,696 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,696 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,696 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,697 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,697 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,697 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,697 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,697 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,697 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,697 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,697 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,698 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,698 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,698 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,698 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,698 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,698 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,698 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,698 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,699 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,699 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,699 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,699 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,699 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,699 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,699 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,699 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,700 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,700 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,700 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,700 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,700 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,700 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,700 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,701 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,701 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,701 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,701 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,701 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,701 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,701 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,702 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,702 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,702 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,702 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,702 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,702 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,703 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,703 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,703 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,703 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,703 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,703 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,703 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,704 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,704 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,704 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,704 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,704 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,704 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,704 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,704 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,705 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,705 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,705 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,705 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,705 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,705 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,705 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,706 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,706 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,706 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,706 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,706 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,706 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,706 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,706 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,707 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,707 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,707 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,707 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,707 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,707 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,707 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,708 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,708 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,708 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,708 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,708 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,708 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,708 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,709 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,709 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,709 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,709 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,709 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,709 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,709 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,710 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,710 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,712 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,712 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,712 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,712 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,712 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,712 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,713 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,713 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,713 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,713 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,713 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,713 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,713 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,713 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,714 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,714 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,714 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,714 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,714 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,718 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,718 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,718 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,718 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,718 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,718 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,719 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,719 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,719 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,719 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,719 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,719 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,719 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,719 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,719 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,720 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,720 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,720 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,720 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,720 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,720 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,720 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,720 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:08,727 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-07-13 18:21:08,747 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-13 18:21:08,762 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 18:21:08,763 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 18:21:08,763 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 18:21:08,763 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 18:21:08,763 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 18:21:08,763 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 18:21:08,763 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 18:21:08,763 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == t1Thread1of1ForFork1======== [2021-07-13 18:21:08,775 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 152 places, 157 transitions, 336 flow [2021-07-13 18:21:09,061 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 9090 states, 9088 states have (on average 2.8570642605633805) internal successors, (25965), 9089 states have internal predecessors, (25965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:09,109 INFO L276 IsEmpty]: Start isEmpty. Operand has 9090 states, 9088 states have (on average 2.8570642605633805) internal successors, (25965), 9089 states have internal predecessors, (25965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:09,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 18:21:09,141 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:09,142 INFO L508 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] [2021-07-13 18:21:09,142 INFO L430 AbstractCegarLoop]: === Iteration 1 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:09,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:09,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1993411196, now seen corresponding path program 1 times [2021-07-13 18:21:09,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:09,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221489461] [2021-07-13 18:21:09,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:09,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:21:09,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:09,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221489461] [2021-07-13 18:21:09,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221489461] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:21:09,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:21:09,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 18:21:09,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7636089] [2021-07-13 18:21:09,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 18:21:09,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:09,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 18:21:09,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 18:21:09,539 INFO L87 Difference]: Start difference. First operand has 9090 states, 9088 states have (on average 2.8570642605633805) internal successors, (25965), 9089 states have internal predecessors, (25965), 0 states have call successors, (0), 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) [2021-07-13 18:21:09,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:09,794 INFO L93 Difference]: Finished difference Result 13194 states and 36538 transitions. [2021-07-13 18:21:09,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 18:21:09,797 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 [2021-07-13 18:21:09,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:09,904 INFO L225 Difference]: With dead ends: 13194 [2021-07-13 18:21:09,904 INFO L226 Difference]: Without dead ends: 12844 [2021-07-13 18:21:09,905 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 18:21:10,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12844 states. [2021-07-13 18:21:10,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12844 to 11431. [2021-07-13 18:21:10,506 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) [2021-07-13 18:21:10,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11431 states to 11431 states and 31676 transitions. [2021-07-13 18:21:10,567 INFO L78 Accepts]: Start accepts. Automaton has 11431 states and 31676 transitions. Word has length 54 [2021-07-13 18:21:10,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:10,569 INFO L482 AbstractCegarLoop]: Abstraction has 11431 states and 31676 transitions. [2021-07-13 18:21:10,569 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) [2021-07-13 18:21:10,574 INFO L276 IsEmpty]: Start isEmpty. Operand 11431 states and 31676 transitions. [2021-07-13 18:21:10,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-13 18:21:10,587 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:10,587 INFO L508 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] [2021-07-13 18:21:10,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 18:21:10,587 INFO L430 AbstractCegarLoop]: === Iteration 2 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:10,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:10,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1465764104, now seen corresponding path program 1 times [2021-07-13 18:21:10,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:10,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774813752] [2021-07-13 18:21:10,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:10,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:10,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:21:10,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:10,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774813752] [2021-07-13 18:21:10,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774813752] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:21:10,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:21:10,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 18:21:10,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882214087] [2021-07-13 18:21:10,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 18:21:10,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:10,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 18:21:10,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 18:21:10,794 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) [2021-07-13 18:21:10,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:10,980 INFO L93 Difference]: Finished difference Result 15291 states and 42316 transitions. [2021-07-13 18:21:10,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 18:21:10,981 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 [2021-07-13 18:21:10,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:11,098 INFO L225 Difference]: With dead ends: 15291 [2021-07-13 18:21:11,099 INFO L226 Difference]: Without dead ends: 15291 [2021-07-13 18:21:11,100 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 18:21:11,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15291 states. [2021-07-13 18:21:11,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15291 to 12010. [2021-07-13 18:21:11,525 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) [2021-07-13 18:21:11,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12010 states to 12010 states and 33272 transitions. [2021-07-13 18:21:11,585 INFO L78 Accepts]: Start accepts. Automaton has 12010 states and 33272 transitions. Word has length 63 [2021-07-13 18:21:11,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:11,586 INFO L482 AbstractCegarLoop]: Abstraction has 12010 states and 33272 transitions. [2021-07-13 18:21:11,586 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) [2021-07-13 18:21:11,586 INFO L276 IsEmpty]: Start isEmpty. Operand 12010 states and 33272 transitions. [2021-07-13 18:21:11,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-07-13 18:21:11,610 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:11,611 INFO L508 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] [2021-07-13 18:21:11,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 18:21:11,611 INFO L430 AbstractCegarLoop]: === Iteration 3 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:11,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:11,615 INFO L82 PathProgramCache]: Analyzing trace with hash 2084271961, now seen corresponding path program 1 times [2021-07-13 18:21:11,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:11,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161873956] [2021-07-13 18:21:11,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:11,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:11,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:21:11,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:11,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161873956] [2021-07-13 18:21:11,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161873956] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:21:11,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:21:11,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 18:21:11,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132104832] [2021-07-13 18:21:11,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 18:21:11,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:11,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 18:21:11,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 18:21:11,730 INFO L87 Difference]: Start difference. First operand 12010 states and 33272 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 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) [2021-07-13 18:21:12,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:12,126 INFO L93 Difference]: Finished difference Result 19268 states and 53351 transitions. [2021-07-13 18:21:12,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 18:21:12,127 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 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 [2021-07-13 18:21:12,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:12,214 INFO L225 Difference]: With dead ends: 19268 [2021-07-13 18:21:12,214 INFO L226 Difference]: Without dead ends: 19268 [2021-07-13 18:21:12,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 18:21:12,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19268 states. [2021-07-13 18:21:12,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19268 to 12548. [2021-07-13 18:21:12,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12548 states, 12546 states have (on average 2.768372389606249) internal successors, (34732), 12547 states have internal predecessors, (34732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:12,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12548 states to 12548 states and 34732 transitions. [2021-07-13 18:21:12,795 INFO L78 Accepts]: Start accepts. Automaton has 12548 states and 34732 transitions. Word has length 80 [2021-07-13 18:21:12,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:12,797 INFO L482 AbstractCegarLoop]: Abstraction has 12548 states and 34732 transitions. [2021-07-13 18:21:12,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 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) [2021-07-13 18:21:12,797 INFO L276 IsEmpty]: Start isEmpty. Operand 12548 states and 34732 transitions. [2021-07-13 18:21:12,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-07-13 18:21:12,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:12,820 INFO L508 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] [2021-07-13 18:21:12,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 18:21:12,821 INFO L430 AbstractCegarLoop]: === Iteration 4 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:12,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:12,821 INFO L82 PathProgramCache]: Analyzing trace with hash 2006954144, now seen corresponding path program 1 times [2021-07-13 18:21:12,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:12,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921686649] [2021-07-13 18:21:12,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:12,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:13,012 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:21:13,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:13,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921686649] [2021-07-13 18:21:13,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921686649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:13,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6337811] [2021-07-13 18:21:13,014 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 [2021-07-13 18:21:13,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:13,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 18:21:13,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:13,316 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:21:13,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6337811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:13,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:13,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 18:21:13,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585688460] [2021-07-13 18:21:13,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 18:21:13,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:13,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 18:21:13,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 18:21:13,319 INFO L87 Difference]: Start difference. First operand 12548 states and 34732 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) [2021-07-13 18:21:13,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:13,501 INFO L93 Difference]: Finished difference Result 18881 states and 52105 transitions. [2021-07-13 18:21:13,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 18:21:13,502 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 [2021-07-13 18:21:13,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:13,569 INFO L225 Difference]: With dead ends: 18881 [2021-07-13 18:21:13,569 INFO L226 Difference]: Without dead ends: 18881 [2021-07-13 18:21:13,569 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-13 18:21:13,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18881 states. [2021-07-13 18:21:14,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18881 to 17185. [2021-07-13 18:21:14,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17185 states, 17183 states have (on average 2.7599371471803527) internal successors, (47424), 17184 states have internal predecessors, (47424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:14,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17185 states to 17185 states and 47424 transitions. [2021-07-13 18:21:14,124 INFO L78 Accepts]: Start accepts. Automaton has 17185 states and 47424 transitions. Word has length 89 [2021-07-13 18:21:14,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:14,124 INFO L482 AbstractCegarLoop]: Abstraction has 17185 states and 47424 transitions. [2021-07-13 18:21:14,125 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) [2021-07-13 18:21:14,125 INFO L276 IsEmpty]: Start isEmpty. Operand 17185 states and 47424 transitions. [2021-07-13 18:21:14,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-07-13 18:21:14,164 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:14,164 INFO L508 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] [2021-07-13 18:21:14,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:21:14,382 INFO L430 AbstractCegarLoop]: === Iteration 5 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:14,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:14,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1848404289, now seen corresponding path program 1 times [2021-07-13 18:21:14,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:14,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888912570] [2021-07-13 18:21:14,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:14,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:14,443 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-07-13 18:21:14,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:14,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888912570] [2021-07-13 18:21:14,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888912570] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:21:14,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:21:14,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 18:21:14,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607463814] [2021-07-13 18:21:14,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 18:21:14,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:14,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 18:21:14,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 18:21:14,446 INFO L87 Difference]: Start difference. First operand 17185 states and 47424 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:14,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:14,491 INFO L93 Difference]: Finished difference Result 6917 states and 17819 transitions. [2021-07-13 18:21:14,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 18:21:14,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-07-13 18:21:14,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:14,515 INFO L225 Difference]: With dead ends: 6917 [2021-07-13 18:21:14,515 INFO L226 Difference]: Without dead ends: 6725 [2021-07-13 18:21:14,516 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 18:21:14,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6725 states. [2021-07-13 18:21:14,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6725 to 6645. [2021-07-13 18:21:14,793 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) [2021-07-13 18:21:14,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6645 states to 6645 states and 17123 transitions. [2021-07-13 18:21:14,812 INFO L78 Accepts]: Start accepts. Automaton has 6645 states and 17123 transitions. Word has length 115 [2021-07-13 18:21:14,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:14,813 INFO L482 AbstractCegarLoop]: Abstraction has 6645 states and 17123 transitions. [2021-07-13 18:21:14,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:14,814 INFO L276 IsEmpty]: Start isEmpty. Operand 6645 states and 17123 transitions. [2021-07-13 18:21:14,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-07-13 18:21:14,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:14,838 INFO L508 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] [2021-07-13 18:21:14,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 18:21:14,838 INFO L430 AbstractCegarLoop]: === Iteration 6 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:14,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:14,839 INFO L82 PathProgramCache]: Analyzing trace with hash 730019836, now seen corresponding path program 2 times [2021-07-13 18:21:14,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:14,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997827727] [2021-07-13 18:21:14,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:14,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:14,982 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:21:14,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:14,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997827727] [2021-07-13 18:21:14,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997827727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:14,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676067652] [2021-07-13 18:21:14,983 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 [2021-07-13 18:21:15,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:21:15,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:21:15,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 18:21:15,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:15,400 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:21:15,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676067652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:15,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:15,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 18:21:15,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032200804] [2021-07-13 18:21:15,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 18:21:15,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:15,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 18:21:15,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-13 18:21:15,403 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) [2021-07-13 18:21:15,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:15,531 INFO L93 Difference]: Finished difference Result 9517 states and 24500 transitions. [2021-07-13 18:21:15,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 18:21:15,531 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 [2021-07-13 18:21:15,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:15,561 INFO L225 Difference]: With dead ends: 9517 [2021-07-13 18:21:15,561 INFO L226 Difference]: Without dead ends: 9517 [2021-07-13 18:21:15,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-07-13 18:21:15,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9517 states. [2021-07-13 18:21:15,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9517 to 8880. [2021-07-13 18:21:15,746 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) [2021-07-13 18:21:15,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8880 states to 8880 states and 22877 transitions. [2021-07-13 18:21:15,771 INFO L78 Accepts]: Start accepts. Automaton has 8880 states and 22877 transitions. Word has length 124 [2021-07-13 18:21:15,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:15,771 INFO L482 AbstractCegarLoop]: Abstraction has 8880 states and 22877 transitions. [2021-07-13 18:21:15,771 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) [2021-07-13 18:21:15,771 INFO L276 IsEmpty]: Start isEmpty. Operand 8880 states and 22877 transitions. [2021-07-13 18:21:15,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-07-13 18:21:15,789 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:15,789 INFO L508 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] [2021-07-13 18:21:16,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:21:16,003 INFO L430 AbstractCegarLoop]: === Iteration 7 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:16,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:16,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1335564111, now seen corresponding path program 1 times [2021-07-13 18:21:16,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:16,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820995693] [2021-07-13 18:21:16,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:16,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:16,110 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:21:16,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:16,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820995693] [2021-07-13 18:21:16,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820995693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:16,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593790734] [2021-07-13 18:21:16,111 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 [2021-07-13 18:21:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:16,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 18:21:16,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:16,513 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-13 18:21:16,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593790734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:16,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:16,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-07-13 18:21:16,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255261779] [2021-07-13 18:21:16,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 18:21:16,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:16,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 18:21:16,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 18:21:16,516 INFO L87 Difference]: Start difference. First operand 8880 states and 22877 transitions. Second operand has 8 states, 8 states have (on average 21.625) internal successors, (173), 8 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:16,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:16,705 INFO L93 Difference]: Finished difference Result 12150 states and 31382 transitions. [2021-07-13 18:21:16,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 18:21:16,706 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 21.625) internal successors, (173), 8 states have internal predecessors, (173), 0 states have call successors, (0), 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 [2021-07-13 18:21:16,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:16,737 INFO L225 Difference]: With dead ends: 12150 [2021-07-13 18:21:16,737 INFO L226 Difference]: Without dead ends: 12150 [2021-07-13 18:21:16,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-13 18:21:16,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12150 states. [2021-07-13 18:21:16,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12150 to 10700. [2021-07-13 18:21:16,986 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) [2021-07-13 18:21:17,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10700 states to 10700 states and 27798 transitions. [2021-07-13 18:21:17,015 INFO L78 Accepts]: Start accepts. Automaton has 10700 states and 27798 transitions. Word has length 129 [2021-07-13 18:21:17,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:17,015 INFO L482 AbstractCegarLoop]: Abstraction has 10700 states and 27798 transitions. [2021-07-13 18:21:17,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 21.625) internal successors, (173), 8 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:17,016 INFO L276 IsEmpty]: Start isEmpty. Operand 10700 states and 27798 transitions. [2021-07-13 18:21:17,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-07-13 18:21:17,038 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:17,039 INFO L508 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] [2021-07-13 18:21:17,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:21:17,253 INFO L430 AbstractCegarLoop]: === Iteration 8 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:17,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:17,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1305308384, now seen corresponding path program 3 times [2021-07-13 18:21:17,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:17,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837271959] [2021-07-13 18:21:17,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:17,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:17,374 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:21:17,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:17,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837271959] [2021-07-13 18:21:17,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837271959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:17,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73182413] [2021-07-13 18:21:17,375 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 [2021-07-13 18:21:17,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 18:21:17,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:21:17,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 18:21:17,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:21:17,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73182413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:17,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:17,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 18:21:17,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207111908] [2021-07-13 18:21:17,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 18:21:17,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:17,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 18:21:17,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-13 18:21:17,833 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) [2021-07-13 18:21:18,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:18,092 INFO L93 Difference]: Finished difference Result 14707 states and 37949 transitions. [2021-07-13 18:21:18,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 18:21:18,093 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 [2021-07-13 18:21:18,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:18,129 INFO L225 Difference]: With dead ends: 14707 [2021-07-13 18:21:18,130 INFO L226 Difference]: Without dead ends: 14707 [2021-07-13 18:21:18,130 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:21:18,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14707 states. [2021-07-13 18:21:18,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14707 to 12935. [2021-07-13 18:21:18,455 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) [2021-07-13 18:21:18,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12935 states to 12935 states and 33552 transitions. [2021-07-13 18:21:18,494 INFO L78 Accepts]: Start accepts. Automaton has 12935 states and 33552 transitions. Word has length 159 [2021-07-13 18:21:18,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:18,495 INFO L482 AbstractCegarLoop]: Abstraction has 12935 states and 33552 transitions. [2021-07-13 18:21:18,495 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) [2021-07-13 18:21:18,495 INFO L276 IsEmpty]: Start isEmpty. Operand 12935 states and 33552 transitions. [2021-07-13 18:21:18,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-07-13 18:21:18,521 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:18,521 INFO L508 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] [2021-07-13 18:21:18,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:21:18,746 INFO L430 AbstractCegarLoop]: === Iteration 9 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:18,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:18,747 INFO L82 PathProgramCache]: Analyzing trace with hash -53412733, now seen corresponding path program 2 times [2021-07-13 18:21:18,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:18,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235885342] [2021-07-13 18:21:18,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-13 18:21:18,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:18,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235885342] [2021-07-13 18:21:18,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235885342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:18,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608180863] [2021-07-13 18:21:18,875 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 [2021-07-13 18:21:19,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:21:19,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:21:19,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 18:21:19,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:19,348 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-13 18:21:19,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608180863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:19,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:19,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 18:21:19,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513992101] [2021-07-13 18:21:19,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 18:21:19,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:19,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 18:21:19,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 18:21:19,351 INFO L87 Difference]: Start difference. First operand 12935 states and 33552 transitions. Second operand has 10 states, 10 states have (on average 20.8) internal successors, (208), 10 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:19,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:19,572 INFO L93 Difference]: Finished difference Result 17340 states and 44831 transitions. [2021-07-13 18:21:19,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 18:21:19,572 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 20.8) internal successors, (208), 10 states have internal predecessors, (208), 0 states have call successors, (0), 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 [2021-07-13 18:21:19,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:19,610 INFO L225 Difference]: With dead ends: 17340 [2021-07-13 18:21:19,610 INFO L226 Difference]: Without dead ends: 17340 [2021-07-13 18:21:19,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:21:19,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17340 states. [2021-07-13 18:21:19,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17340 to 12935. [2021-07-13 18:21:19,940 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) [2021-07-13 18:21:19,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12935 states to 12935 states and 33552 transitions. [2021-07-13 18:21:19,978 INFO L78 Accepts]: Start accepts. Automaton has 12935 states and 33552 transitions. Word has length 164 [2021-07-13 18:21:19,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:19,978 INFO L482 AbstractCegarLoop]: Abstraction has 12935 states and 33552 transitions. [2021-07-13 18:21:19,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 20.8) internal successors, (208), 10 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:19,979 INFO L276 IsEmpty]: Start isEmpty. Operand 12935 states and 33552 transitions. [2021-07-13 18:21:20,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-07-13 18:21:20,008 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:20,008 INFO L508 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] [2021-07-13 18:21:20,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:21:20,225 INFO L430 AbstractCegarLoop]: === Iteration 10 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:20,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:20,225 INFO L82 PathProgramCache]: Analyzing trace with hash -955169412, now seen corresponding path program 4 times [2021-07-13 18:21:20,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:20,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264403638] [2021-07-13 18:21:20,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:20,362 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:21:20,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:20,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264403638] [2021-07-13 18:21:20,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264403638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:20,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835153465] [2021-07-13 18:21:20,362 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 [2021-07-13 18:21:20,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:21:20,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:21:20,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 18:21:20,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:20,843 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:21:20,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835153465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:20,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:20,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-07-13 18:21:20,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366755352] [2021-07-13 18:21:20,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 18:21:20,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:20,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 18:21:20,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-13 18:21:20,845 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) [2021-07-13 18:21:21,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:21,089 INFO L93 Difference]: Finished difference Result 17022 states and 43907 transitions. [2021-07-13 18:21:21,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 18:21:21,090 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 [2021-07-13 18:21:21,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:21,134 INFO L225 Difference]: With dead ends: 17022 [2021-07-13 18:21:21,135 INFO L226 Difference]: Without dead ends: 17022 [2021-07-13 18:21:21,135 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 128.7ms TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:21:21,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17022 states. [2021-07-13 18:21:21,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17022 to 15170. [2021-07-13 18:21:21,495 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) [2021-07-13 18:21:21,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15170 states to 15170 states and 39306 transitions. [2021-07-13 18:21:21,534 INFO L78 Accepts]: Start accepts. Automaton has 15170 states and 39306 transitions. Word has length 194 [2021-07-13 18:21:21,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:21,534 INFO L482 AbstractCegarLoop]: Abstraction has 15170 states and 39306 transitions. [2021-07-13 18:21:21,534 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) [2021-07-13 18:21:21,534 INFO L276 IsEmpty]: Start isEmpty. Operand 15170 states and 39306 transitions. [2021-07-13 18:21:21,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-07-13 18:21:21,563 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:21,563 INFO L508 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] [2021-07-13 18:21:21,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:21:21,785 INFO L430 AbstractCegarLoop]: === Iteration 11 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:21,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:21,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1103560049, now seen corresponding path program 3 times [2021-07-13 18:21:21,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:21,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536047975] [2021-07-13 18:21:21,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:21,933 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 138 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-07-13 18:21:21,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:21,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536047975] [2021-07-13 18:21:21,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536047975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:21,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759217790] [2021-07-13 18:21:21,934 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 [2021-07-13 18:21:22,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 18:21:22,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:21:22,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 18:21:22,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:22,425 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 115 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:21:22,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759217790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:22,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:22,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-07-13 18:21:22,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348037478] [2021-07-13 18:21:22,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 18:21:22,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:22,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 18:21:22,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 18:21:22,428 INFO L87 Difference]: Start difference. First operand 15170 states and 39306 transitions. Second operand has 10 states, 10 states have (on average 22.1) internal successors, (221), 10 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:22,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:22,662 INFO L93 Difference]: Finished difference Result 20205 states and 52398 transitions. [2021-07-13 18:21:22,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 18:21:22,663 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 22.1) internal successors, (221), 10 states have internal predecessors, (221), 0 states have call successors, (0), 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 [2021-07-13 18:21:22,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:22,702 INFO L225 Difference]: With dead ends: 20205 [2021-07-13 18:21:22,702 INFO L226 Difference]: Without dead ends: 20205 [2021-07-13 18:21:22,703 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:21:22,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20205 states. [2021-07-13 18:21:22,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20205 to 16990. [2021-07-13 18:21:23,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16990 states, 16988 states have (on average 2.603425947727808) internal successors, (44227), 16989 states have internal predecessors, (44227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:23,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16990 states to 16990 states and 44227 transitions. [2021-07-13 18:21:23,050 INFO L78 Accepts]: Start accepts. Automaton has 16990 states and 44227 transitions. Word has length 199 [2021-07-13 18:21:23,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:23,050 INFO L482 AbstractCegarLoop]: Abstraction has 16990 states and 44227 transitions. [2021-07-13 18:21:23,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 22.1) internal successors, (221), 10 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:23,050 INFO L276 IsEmpty]: Start isEmpty. Operand 16990 states and 44227 transitions. [2021-07-13 18:21:23,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-07-13 18:21:23,081 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:23,081 INFO L508 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] [2021-07-13 18:21:23,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:21:23,297 INFO L430 AbstractCegarLoop]: === Iteration 12 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:23,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:23,298 INFO L82 PathProgramCache]: Analyzing trace with hash 96496335, now seen corresponding path program 4 times [2021-07-13 18:21:23,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:23,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043998832] [2021-07-13 18:21:23,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:23,419 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 136 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-13 18:21:23,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:23,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043998832] [2021-07-13 18:21:23,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043998832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:23,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676739578] [2021-07-13 18:21:23,420 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 [2021-07-13 18:21:23,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:21:23,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:21:23,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 18:21:23,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:23,875 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 136 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-13 18:21:23,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676739578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:23,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:23,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-13 18:21:23,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868353835] [2021-07-13 18:21:23,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 18:21:23,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:23,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 18:21:23,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-13 18:21:23,877 INFO L87 Difference]: Start difference. First operand 16990 states and 44227 transitions. Second operand has 12 states, 12 states have (on average 20.25) internal successors, (243), 12 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:24,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:24,132 INFO L93 Difference]: Finished difference Result 21555 states and 55914 transitions. [2021-07-13 18:21:24,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 18:21:24,133 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 20.25) internal successors, (243), 12 states have internal predecessors, (243), 0 states have call successors, (0), 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 [2021-07-13 18:21:24,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:24,172 INFO L225 Difference]: With dead ends: 21555 [2021-07-13 18:21:24,172 INFO L226 Difference]: Without dead ends: 21555 [2021-07-13 18:21:24,173 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 127.7ms TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:21:24,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21555 states. [2021-07-13 18:21:24,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21555 to 16990. [2021-07-13 18:21:24,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16990 states, 16988 states have (on average 2.603425947727808) internal successors, (44227), 16989 states have internal predecessors, (44227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:24,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16990 states to 16990 states and 44227 transitions. [2021-07-13 18:21:24,730 INFO L78 Accepts]: Start accepts. Automaton has 16990 states and 44227 transitions. Word has length 199 [2021-07-13 18:21:24,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:24,730 INFO L482 AbstractCegarLoop]: Abstraction has 16990 states and 44227 transitions. [2021-07-13 18:21:24,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 20.25) internal successors, (243), 12 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:24,730 INFO L276 IsEmpty]: Start isEmpty. Operand 16990 states and 44227 transitions. [2021-07-13 18:21:24,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-07-13 18:21:24,762 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:24,762 INFO L508 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] [2021-07-13 18:21:24,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-07-13 18:21:24,976 INFO L430 AbstractCegarLoop]: === Iteration 13 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:24,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:24,976 INFO L82 PathProgramCache]: Analyzing trace with hash -782396000, now seen corresponding path program 5 times [2021-07-13 18:21:24,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:24,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622732526] [2021-07-13 18:21:24,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:25,122 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:21:25,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:25,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622732526] [2021-07-13 18:21:25,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622732526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:25,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433997419] [2021-07-13 18:21:25,123 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 [2021-07-13 18:21:25,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 18:21:25,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:21:25,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 18:21:25,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:25,670 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:21:25,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433997419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:25,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:25,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-07-13 18:21:25,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869732013] [2021-07-13 18:21:25,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 18:21:25,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:25,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 18:21:25,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:21:25,672 INFO L87 Difference]: Start difference. First operand 16990 states and 44227 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) [2021-07-13 18:21:25,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:25,961 INFO L93 Difference]: Finished difference Result 22762 states and 58965 transitions. [2021-07-13 18:21:25,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 18:21:25,962 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 [2021-07-13 18:21:25,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:26,019 INFO L225 Difference]: With dead ends: 22762 [2021-07-13 18:21:26,020 INFO L226 Difference]: Without dead ends: 22762 [2021-07-13 18:21:26,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 164.9ms TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2021-07-13 18:21:26,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22762 states. [2021-07-13 18:21:26,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22762 to 19225. [2021-07-13 18:21:26,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19225 states, 19223 states have (on average 2.6000624252197886) internal successors, (49981), 19224 states have internal predecessors, (49981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:26,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19225 states to 19225 states and 49981 transitions. [2021-07-13 18:21:26,519 INFO L78 Accepts]: Start accepts. Automaton has 19225 states and 49981 transitions. Word has length 229 [2021-07-13 18:21:26,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:26,519 INFO L482 AbstractCegarLoop]: Abstraction has 19225 states and 49981 transitions. [2021-07-13 18:21:26,519 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) [2021-07-13 18:21:26,519 INFO L276 IsEmpty]: Start isEmpty. Operand 19225 states and 49981 transitions. [2021-07-13 18:21:26,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-07-13 18:21:26,546 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:26,547 INFO L508 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] [2021-07-13 18:21:26,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:21:26,751 INFO L430 AbstractCegarLoop]: === Iteration 14 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:26,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:26,751 INFO L82 PathProgramCache]: Analyzing trace with hash 789549174, now seen corresponding path program 1 times [2021-07-13 18:21:26,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:26,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458642993] [2021-07-13 18:21:26,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:26,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:26,877 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 9 proven. 155 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-07-13 18:21:26,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:26,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458642993] [2021-07-13 18:21:26,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458642993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:26,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326566798] [2021-07-13 18:21:26,878 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 [2021-07-13 18:21:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:27,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 18:21:27,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:27,382 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 9 proven. 131 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-07-13 18:21:27,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326566798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:27,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:27,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-07-13 18:21:27,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475965644] [2021-07-13 18:21:27,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 18:21:27,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:27,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 18:21:27,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-13 18:21:27,385 INFO L87 Difference]: Start difference. First operand 19225 states and 49981 transitions. Second operand has 11 states, 11 states have (on average 21.90909090909091) internal successors, (241), 11 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) [2021-07-13 18:21:27,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:27,680 INFO L93 Difference]: Finished difference Result 31875 states and 82897 transitions. [2021-07-13 18:21:27,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 18:21:27,681 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 21.90909090909091) internal successors, (241), 11 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 233 [2021-07-13 18:21:27,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:27,768 INFO L225 Difference]: With dead ends: 31875 [2021-07-13 18:21:27,768 INFO L226 Difference]: Without dead ends: 31875 [2021-07-13 18:21:27,769 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 118.4ms TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:21:27,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31875 states. [2021-07-13 18:21:28,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31875 to 20565. [2021-07-13 18:21:28,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20565 states, 20563 states have (on average 2.6065262850751347) internal successors, (53598), 20564 states have internal predecessors, (53598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:28,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20565 states to 20565 states and 53598 transitions. [2021-07-13 18:21:28,294 INFO L78 Accepts]: Start accepts. Automaton has 20565 states and 53598 transitions. Word has length 233 [2021-07-13 18:21:28,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:28,295 INFO L482 AbstractCegarLoop]: Abstraction has 20565 states and 53598 transitions. [2021-07-13 18:21:28,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 21.90909090909091) internal successors, (241), 11 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) [2021-07-13 18:21:28,295 INFO L276 IsEmpty]: Start isEmpty. Operand 20565 states and 53598 transitions. [2021-07-13 18:21:28,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-07-13 18:21:28,324 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:28,324 INFO L508 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] [2021-07-13 18:21:28,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:21:28,525 INFO L430 AbstractCegarLoop]: === Iteration 15 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:28,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:28,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1579542445, now seen corresponding path program 5 times [2021-07-13 18:21:28,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:28,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790642709] [2021-07-13 18:21:28,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:28,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:28,659 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 258 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-07-13 18:21:28,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:28,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790642709] [2021-07-13 18:21:28,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790642709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:28,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32004390] [2021-07-13 18:21:28,660 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 [2021-07-13 18:21:28,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 18:21:28,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:21:28,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 18:21:28,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 235 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:21:29,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32004390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:29,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:29,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-07-13 18:21:29,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283121811] [2021-07-13 18:21:29,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 18:21:29,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:29,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 18:21:29,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-13 18:21:29,293 INFO L87 Difference]: Start difference. First operand 20565 states and 53598 transitions. Second operand has 12 states, 12 states have (on average 21.333333333333332) internal successors, (256), 12 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:29,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:29,591 INFO L93 Difference]: Finished difference Result 27690 states and 72018 transitions. [2021-07-13 18:21:29,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 18:21:29,592 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 21.333333333333332) internal successors, (256), 12 states have internal predecessors, (256), 0 states have call successors, (0), 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 [2021-07-13 18:21:29,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:29,659 INFO L225 Difference]: With dead ends: 27690 [2021-07-13 18:21:29,659 INFO L226 Difference]: Without dead ends: 27690 [2021-07-13 18:21:29,659 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 128.4ms TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2021-07-13 18:21:29,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27690 states. [2021-07-13 18:21:30,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27690 to 23465. [2021-07-13 18:21:30,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23465 states, 23463 states have (on average 2.6199974427822528) internal successors, (61473), 23464 states have internal predecessors, (61473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:30,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23465 states to 23465 states and 61473 transitions. [2021-07-13 18:21:30,244 INFO L78 Accepts]: Start accepts. Automaton has 23465 states and 61473 transitions. Word has length 234 [2021-07-13 18:21:30,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:30,244 INFO L482 AbstractCegarLoop]: Abstraction has 23465 states and 61473 transitions. [2021-07-13 18:21:30,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 21.333333333333332) internal successors, (256), 12 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:30,244 INFO L276 IsEmpty]: Start isEmpty. Operand 23465 states and 61473 transitions. [2021-07-13 18:21:30,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-07-13 18:21:30,409 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:30,409 INFO L508 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] [2021-07-13 18:21:30,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 18:21:30,610 INFO L430 AbstractCegarLoop]: === Iteration 16 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:30,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:30,610 INFO L82 PathProgramCache]: Analyzing trace with hash 65507523, now seen corresponding path program 6 times [2021-07-13 18:21:30,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:30,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393599800] [2021-07-13 18:21:30,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:30,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:30,779 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 235 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:21:30,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:30,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393599800] [2021-07-13 18:21:30,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393599800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:30,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895077487] [2021-07-13 18:21:30,779 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 [2021-07-13 18:21:30,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 18:21:30,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:21:30,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 18:21:30,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:31,291 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 235 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:21:31,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895077487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:31,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:31,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-13 18:21:31,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715149855] [2021-07-13 18:21:31,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 18:21:31,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:31,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 18:21:31,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-13 18:21:31,293 INFO L87 Difference]: Start difference. First operand 23465 states and 61473 transitions. Second operand has 12 states, 12 states have (on average 21.333333333333332) internal successors, (256), 12 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:31,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:31,577 INFO L93 Difference]: Finished difference Result 35440 states and 92193 transitions. [2021-07-13 18:21:31,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 18:21:31,578 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 21.333333333333332) internal successors, (256), 12 states have internal predecessors, (256), 0 states have call successors, (0), 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 [2021-07-13 18:21:31,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:31,755 INFO L225 Difference]: With dead ends: 35440 [2021-07-13 18:21:31,755 INFO L226 Difference]: Without dead ends: 35440 [2021-07-13 18:21:31,755 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:21:31,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35440 states. [2021-07-13 18:21:32,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35440 to 25285. [2021-07-13 18:21:32,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25285 states, 25283 states have (on average 2.6260333030099274) internal successors, (66394), 25284 states have internal predecessors, (66394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:32,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25285 states to 25285 states and 66394 transitions. [2021-07-13 18:21:32,442 INFO L78 Accepts]: Start accepts. Automaton has 25285 states and 66394 transitions. Word has length 234 [2021-07-13 18:21:32,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:32,457 INFO L482 AbstractCegarLoop]: Abstraction has 25285 states and 66394 transitions. [2021-07-13 18:21:32,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 21.333333333333332) internal successors, (256), 12 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:32,457 INFO L276 IsEmpty]: Start isEmpty. Operand 25285 states and 66394 transitions. [2021-07-13 18:21:32,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-07-13 18:21:32,489 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:32,489 INFO L508 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] [2021-07-13 18:21:32,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-13 18:21:32,690 INFO L430 AbstractCegarLoop]: === Iteration 17 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:32,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:32,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1265563907, now seen corresponding path program 7 times [2021-07-13 18:21:32,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:32,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209963297] [2021-07-13 18:21:32,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:32,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:32,844 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 256 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-13 18:21:32,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:32,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209963297] [2021-07-13 18:21:32,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209963297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:32,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473685321] [2021-07-13 18:21:32,844 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 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 [2021-07-13 18:21:32,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:32,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 18:21:32,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 256 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-13 18:21:33,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473685321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:33,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:33,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-07-13 18:21:33,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842318126] [2021-07-13 18:21:33,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 18:21:33,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:33,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 18:21:33,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 18:21:33,345 INFO L87 Difference]: Start difference. First operand 25285 states and 66394 transitions. Second operand has 14 states, 14 states have (on average 19.857142857142858) internal successors, (278), 14 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:33,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:33,679 INFO L93 Difference]: Finished difference Result 34570 states and 90170 transitions. [2021-07-13 18:21:33,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 18:21:33,680 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 19.857142857142858) internal successors, (278), 14 states have internal predecessors, (278), 0 states have call successors, (0), 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 [2021-07-13 18:21:33,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:33,755 INFO L225 Difference]: With dead ends: 34570 [2021-07-13 18:21:33,755 INFO L226 Difference]: Without dead ends: 34570 [2021-07-13 18:21:33,756 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 159.4ms TimeCoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2021-07-13 18:21:33,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34570 states. [2021-07-13 18:21:34,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34570 to 25285. [2021-07-13 18:21:34,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25285 states, 25283 states have (on average 2.6260333030099274) internal successors, (66394), 25284 states have internal predecessors, (66394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:34,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25285 states to 25285 states and 66394 transitions. [2021-07-13 18:21:34,397 INFO L78 Accepts]: Start accepts. Automaton has 25285 states and 66394 transitions. Word has length 234 [2021-07-13 18:21:34,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:34,398 INFO L482 AbstractCegarLoop]: Abstraction has 25285 states and 66394 transitions. [2021-07-13 18:21:34,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 19.857142857142858) internal successors, (278), 14 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:34,398 INFO L276 IsEmpty]: Start isEmpty. Operand 25285 states and 66394 transitions. [2021-07-13 18:21:34,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-07-13 18:21:34,442 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:34,442 INFO L508 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] [2021-07-13 18:21:34,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 18:21:34,643 INFO L430 AbstractCegarLoop]: === Iteration 18 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:34,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:34,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1578316540, now seen corresponding path program 6 times [2021-07-13 18:21:34,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:34,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106078127] [2021-07-13 18:21:34,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:34,809 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 615 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:21:34,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:34,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106078127] [2021-07-13 18:21:34,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106078127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:34,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875265675] [2021-07-13 18:21:34,809 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 [2021-07-13 18:21:35,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 18:21:35,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:21:35,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 18:21:35,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:35,464 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 615 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:21:35,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875265675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:35,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:35,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-13 18:21:35,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302260152] [2021-07-13 18:21:35,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:21:35,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:35,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:21:35,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:21:35,467 INFO L87 Difference]: Start difference. First operand 25285 states and 66394 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) [2021-07-13 18:21:35,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:35,966 INFO L93 Difference]: Finished difference Result 31662 states and 82561 transitions. [2021-07-13 18:21:35,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 18:21:35,966 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 [2021-07-13 18:21:35,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:36,046 INFO L225 Difference]: With dead ends: 31662 [2021-07-13 18:21:36,046 INFO L226 Difference]: Without dead ends: 31662 [2021-07-13 18:21:36,046 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 194.8ms TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2021-07-13 18:21:36,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31662 states. [2021-07-13 18:21:36,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31662 to 27520. [2021-07-13 18:21:36,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27520 states, 27518 states have (on average 2.621847517988226) internal successors, (72148), 27519 states have internal predecessors, (72148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:36,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27520 states to 27520 states and 72148 transitions. [2021-07-13 18:21:36,615 INFO L78 Accepts]: Start accepts. Automaton has 27520 states and 72148 transitions. Word has length 264 [2021-07-13 18:21:36,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:36,616 INFO L482 AbstractCegarLoop]: Abstraction has 27520 states and 72148 transitions. [2021-07-13 18:21:36,616 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) [2021-07-13 18:21:36,616 INFO L276 IsEmpty]: Start isEmpty. Operand 27520 states and 72148 transitions. [2021-07-13 18:21:36,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-07-13 18:21:36,668 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:36,668 INFO L508 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] [2021-07-13 18:21:36,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:21:36,873 INFO L430 AbstractCegarLoop]: === Iteration 19 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:36,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:36,874 INFO L82 PathProgramCache]: Analyzing trace with hash -534545924, now seen corresponding path program 2 times [2021-07-13 18:21:36,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:36,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832431160] [2021-07-13 18:21:36,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:36,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:37,110 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:21:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 12 proven. 275 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-07-13 18:21:37,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:37,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832431160] [2021-07-13 18:21:37,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832431160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:37,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368121841] [2021-07-13 18:21:37,188 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 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 [2021-07-13 18:21:37,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:21:37,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:21:37,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 18:21:37,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:37,716 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 12 proven. 251 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-07-13 18:21:37,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368121841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:37,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:37,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-07-13 18:21:37,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678328804] [2021-07-13 18:21:37,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 18:21:37,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:37,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 18:21:37,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 18:21:37,718 INFO L87 Difference]: Start difference. First operand 27520 states and 72148 transitions. Second operand has 13 states, 13 states have (on average 21.23076923076923) internal successors, (276), 13 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) [2021-07-13 18:21:38,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:38,106 INFO L93 Difference]: Finished difference Result 41645 states and 109000 transitions. [2021-07-13 18:21:38,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 18:21:38,106 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 21.23076923076923) internal successors, (276), 13 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 268 [2021-07-13 18:21:38,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:38,194 INFO L225 Difference]: With dead ends: 41645 [2021-07-13 18:21:38,194 INFO L226 Difference]: Without dead ends: 41645 [2021-07-13 18:21:38,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 358.1ms TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-07-13 18:21:38,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41645 states. [2021-07-13 18:21:38,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41645 to 27520. [2021-07-13 18:21:38,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27520 states, 27518 states have (on average 2.621847517988226) internal successors, (72148), 27519 states have internal predecessors, (72148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:38,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27520 states to 27520 states and 72148 transitions. [2021-07-13 18:21:38,929 INFO L78 Accepts]: Start accepts. Automaton has 27520 states and 72148 transitions. Word has length 268 [2021-07-13 18:21:38,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:38,929 INFO L482 AbstractCegarLoop]: Abstraction has 27520 states and 72148 transitions. [2021-07-13 18:21:38,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 21.23076923076923) internal successors, (276), 13 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) [2021-07-13 18:21:38,929 INFO L276 IsEmpty]: Start isEmpty. Operand 27520 states and 72148 transitions. [2021-07-13 18:21:38,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-07-13 18:21:38,980 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:38,980 INFO L508 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] [2021-07-13 18:21:39,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:21:39,181 INFO L430 AbstractCegarLoop]: === Iteration 20 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:39,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:39,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1482583638, now seen corresponding path program 3 times [2021-07-13 18:21:39,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:39,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907388187] [2021-07-13 18:21:39,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:39,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:39,321 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 12 proven. 252 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-07-13 18:21:39,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:39,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907388187] [2021-07-13 18:21:39,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907388187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:39,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906196124] [2021-07-13 18:21:39,322 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 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 [2021-07-13 18:21:39,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 18:21:39,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:21:39,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 18:21:39,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:39,939 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-07-13 18:21:39,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906196124] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:21:39,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 18:21:39,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2021-07-13 18:21:39,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584505969] [2021-07-13 18:21:39,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 18:21:39,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:39,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 18:21:39,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:21:39,941 INFO L87 Difference]: Start difference. First operand 27520 states and 72148 transitions. Second operand has 6 states, 6 states have (on average 30.5) internal successors, (183), 6 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:40,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:40,177 INFO L93 Difference]: Finished difference Result 36820 states and 96265 transitions. [2021-07-13 18:21:40,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 18:21:40,178 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.5) internal successors, (183), 6 states have internal predecessors, (183), 0 states have call successors, (0), 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 [2021-07-13 18:21:40,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:40,264 INFO L225 Difference]: With dead ends: 36820 [2021-07-13 18:21:40,264 INFO L226 Difference]: Without dead ends: 36820 [2021-07-13 18:21:40,264 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 138.6ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:21:40,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36820 states. [2021-07-13 18:21:40,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36820 to 28740. [2021-07-13 18:21:40,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28740 states, 28738 states have (on average 2.624364952327928) internal successors, (75419), 28739 states have internal predecessors, (75419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:40,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28740 states to 28740 states and 75419 transitions. [2021-07-13 18:21:40,984 INFO L78 Accepts]: Start accepts. Automaton has 28740 states and 75419 transitions. Word has length 268 [2021-07-13 18:21:40,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:40,984 INFO L482 AbstractCegarLoop]: Abstraction has 28740 states and 75419 transitions. [2021-07-13 18:21:40,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 30.5) internal successors, (183), 6 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:40,985 INFO L276 IsEmpty]: Start isEmpty. Operand 28740 states and 75419 transitions. [2021-07-13 18:21:41,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-07-13 18:21:41,031 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:41,031 INFO L508 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] [2021-07-13 18:21:41,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:21:41,232 INFO L430 AbstractCegarLoop]: === Iteration 21 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:41,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:41,232 INFO L82 PathProgramCache]: Analyzing trace with hash -2087748145, now seen corresponding path program 8 times [2021-07-13 18:21:41,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:41,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21811281] [2021-07-13 18:21:41,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:41,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:41,396 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 413 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-07-13 18:21:41,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:41,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21811281] [2021-07-13 18:21:41,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21811281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:41,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275866709] [2021-07-13 18:21:41,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:21:41,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:21:41,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:21:41,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 18:21:41,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:42,069 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 390 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:21:42,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275866709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:42,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:42,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-07-13 18:21:42,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568907554] [2021-07-13 18:21:42,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 18:21:42,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:42,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 18:21:42,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 18:21:42,071 INFO L87 Difference]: Start difference. First operand 28740 states and 75419 transitions. Second operand has 14 states, 14 states have (on average 20.785714285714285) internal successors, (291), 14 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:42,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:42,393 INFO L93 Difference]: Finished difference Result 34730 states and 90551 transitions. [2021-07-13 18:21:42,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 18:21:42,394 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.785714285714285) internal successors, (291), 14 states have internal predecessors, (291), 0 states have call successors, (0), 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 [2021-07-13 18:21:42,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:42,471 INFO L225 Difference]: With dead ends: 34730 [2021-07-13 18:21:42,471 INFO L226 Difference]: Without dead ends: 34730 [2021-07-13 18:21:42,472 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 152.9ms TimeCoverageRelationStatistics Valid=194, Invalid=456, Unknown=0, NotChecked=0, Total=650 [2021-07-13 18:21:42,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34730 states. [2021-07-13 18:21:43,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34730 to 29820. [2021-07-13 18:21:43,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29820 states, 29818 states have (on average 2.6283788315782415) internal successors, (78373), 29819 states have internal predecessors, (78373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:43,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29820 states to 29820 states and 78373 transitions. [2021-07-13 18:21:43,241 INFO L78 Accepts]: Start accepts. Automaton has 29820 states and 78373 transitions. Word has length 269 [2021-07-13 18:21:43,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:43,241 INFO L482 AbstractCegarLoop]: Abstraction has 29820 states and 78373 transitions. [2021-07-13 18:21:43,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 20.785714285714285) internal successors, (291), 14 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:43,241 INFO L276 IsEmpty]: Start isEmpty. Operand 29820 states and 78373 transitions. [2021-07-13 18:21:43,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-07-13 18:21:43,299 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:43,300 INFO L508 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] [2021-07-13 18:21:43,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-13 18:21:43,502 INFO L430 AbstractCegarLoop]: === Iteration 22 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:43,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:43,502 INFO L82 PathProgramCache]: Analyzing trace with hash -137097991, now seen corresponding path program 9 times [2021-07-13 18:21:43,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:43,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452230718] [2021-07-13 18:21:43,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:43,629 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 390 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:21:43,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:43,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452230718] [2021-07-13 18:21:43,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452230718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:43,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607669705] [2021-07-13 18:21:43,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:21:43,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 18:21:43,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:21:43,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 18:21:43,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:44,273 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 390 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:21:44,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607669705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:44,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:44,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-07-13 18:21:44,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917141013] [2021-07-13 18:21:44,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 18:21:44,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:44,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 18:21:44,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 18:21:44,275 INFO L87 Difference]: Start difference. First operand 29820 states and 78373 transitions. Second operand has 14 states, 14 states have (on average 20.785714285714285) internal successors, (291), 14 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:44,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:44,580 INFO L93 Difference]: Finished difference Result 40685 states and 106189 transitions. [2021-07-13 18:21:44,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 18:21:44,581 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.785714285714285) internal successors, (291), 14 states have internal predecessors, (291), 0 states have call successors, (0), 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 [2021-07-13 18:21:44,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:44,664 INFO L225 Difference]: With dead ends: 40685 [2021-07-13 18:21:44,664 INFO L226 Difference]: Without dead ends: 40685 [2021-07-13 18:21:44,664 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 124.1ms TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-07-13 18:21:44,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40685 states. [2021-07-13 18:21:45,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40685 to 32720. [2021-07-13 18:21:45,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32720 states, 32718 states have (on average 2.6361024512500766) internal successors, (86248), 32719 states have internal predecessors, (86248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:45,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32720 states to 32720 states and 86248 transitions. [2021-07-13 18:21:45,555 INFO L78 Accepts]: Start accepts. Automaton has 32720 states and 86248 transitions. Word has length 269 [2021-07-13 18:21:45,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:45,556 INFO L482 AbstractCegarLoop]: Abstraction has 32720 states and 86248 transitions. [2021-07-13 18:21:45,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 20.785714285714285) internal successors, (291), 14 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:45,556 INFO L276 IsEmpty]: Start isEmpty. Operand 32720 states and 86248 transitions. [2021-07-13 18:21:45,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-07-13 18:21:45,607 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:45,607 INFO L508 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] [2021-07-13 18:21:45,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-13 18:21:45,808 INFO L430 AbstractCegarLoop]: === Iteration 23 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:45,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:45,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1651132913, now seen corresponding path program 10 times [2021-07-13 18:21:45,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:45,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289601946] [2021-07-13 18:21:45,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:45,940 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 390 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:21:45,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:45,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289601946] [2021-07-13 18:21:45,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289601946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:45,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510690032] [2021-07-13 18:21:45,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:21:46,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:21:46,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:21:46,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 18:21:46,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:46,673 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 390 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:21:46,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510690032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:46,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:46,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-07-13 18:21:46,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153846086] [2021-07-13 18:21:46,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 18:21:46,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:46,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 18:21:46,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 18:21:46,675 INFO L87 Difference]: Start difference. First operand 32720 states and 86248 transitions. Second operand has 14 states, 14 states have (on average 20.785714285714285) internal successors, (291), 14 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:46,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:46,977 INFO L93 Difference]: Finished difference Result 41535 states and 108864 transitions. [2021-07-13 18:21:46,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 18:21:46,978 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.785714285714285) internal successors, (291), 14 states have internal predecessors, (291), 0 states have call successors, (0), 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 [2021-07-13 18:21:46,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:47,062 INFO L225 Difference]: With dead ends: 41535 [2021-07-13 18:21:47,062 INFO L226 Difference]: Without dead ends: 41535 [2021-07-13 18:21:47,063 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2021-07-13 18:21:47,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41535 states. [2021-07-13 18:21:47,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41535 to 34540. [2021-07-13 18:21:47,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34540 states, 34538 states have (on average 2.6396722450634083) internal successors, (91169), 34539 states have internal predecessors, (91169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:47,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34540 states to 34540 states and 91169 transitions. [2021-07-13 18:21:47,959 INFO L78 Accepts]: Start accepts. Automaton has 34540 states and 91169 transitions. Word has length 269 [2021-07-13 18:21:47,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:47,959 INFO L482 AbstractCegarLoop]: Abstraction has 34540 states and 91169 transitions. [2021-07-13 18:21:47,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 20.785714285714285) internal successors, (291), 14 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:47,960 INFO L276 IsEmpty]: Start isEmpty. Operand 34540 states and 91169 transitions. [2021-07-13 18:21:48,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-07-13 18:21:48,023 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:48,023 INFO L508 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] [2021-07-13 18:21:48,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 18:21:48,224 INFO L430 AbstractCegarLoop]: === Iteration 24 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:48,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:48,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1182222304, now seen corresponding path program 7 times [2021-07-13 18:21:48,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:48,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876124144] [2021-07-13 18:21:48,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:48,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:48,433 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 840 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:21:48,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:48,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876124144] [2021-07-13 18:21:48,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876124144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:48,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503335547] [2021-07-13 18:21:48,434 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 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 [2021-07-13 18:21:48,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:48,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 18:21:48,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:49,164 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 840 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:21:49,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503335547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:49,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:49,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:21:49,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902171072] [2021-07-13 18:21:49,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:21:49,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:49,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:21:49,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:21:49,166 INFO L87 Difference]: Start difference. First operand 34540 states and 91169 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) [2021-07-13 18:21:49,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:49,559 INFO L93 Difference]: Finished difference Result 42602 states and 111719 transitions. [2021-07-13 18:21:49,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 18:21:49,560 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 [2021-07-13 18:21:49,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:49,651 INFO L225 Difference]: With dead ends: 42602 [2021-07-13 18:21:49,651 INFO L226 Difference]: Without dead ends: 42602 [2021-07-13 18:21:49,652 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 242.8ms TimeCoverageRelationStatistics Valid=340, Invalid=716, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 18:21:49,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42602 states. [2021-07-13 18:21:50,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42602 to 36775. [2021-07-13 18:21:50,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36775 states, 36773 states have (on average 2.6357109836020993) internal successors, (96923), 36774 states have internal predecessors, (96923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:50,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36775 states to 36775 states and 96923 transitions. [2021-07-13 18:21:50,598 INFO L78 Accepts]: Start accepts. Automaton has 36775 states and 96923 transitions. Word has length 299 [2021-07-13 18:21:50,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:50,598 INFO L482 AbstractCegarLoop]: Abstraction has 36775 states and 96923 transitions. [2021-07-13 18:21:50,599 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) [2021-07-13 18:21:50,599 INFO L276 IsEmpty]: Start isEmpty. Operand 36775 states and 96923 transitions. [2021-07-13 18:21:50,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-07-13 18:21:50,659 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:50,660 INFO L508 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] [2021-07-13 18:21:50,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-13 18:21:50,860 INFO L430 AbstractCegarLoop]: === Iteration 25 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:50,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:50,861 INFO L82 PathProgramCache]: Analyzing trace with hash 46799625, now seen corresponding path program 4 times [2021-07-13 18:21:50,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:50,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739528503] [2021-07-13 18:21:50,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:50,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:51,023 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 56 proven. 229 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-07-13 18:21:51,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:51,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739528503] [2021-07-13 18:21:51,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739528503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:51,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966671022] [2021-07-13 18:21:51,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:21:51,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:21:51,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:21:51,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 18:21:51,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:51,797 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:21:51,902 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 56 proven. 229 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-07-13 18:21:51,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966671022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:51,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:51,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-07-13 18:21:51,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042726509] [2021-07-13 18:21:51,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 18:21:51,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:51,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 18:21:51,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 18:21:51,904 INFO L87 Difference]: Start difference. First operand 36775 states and 96923 transitions. Second operand has 13 states, 13 states have (on average 21.615384615384617) internal successors, (281), 13 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:52,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:52,248 INFO L93 Difference]: Finished difference Result 53420 states and 139671 transitions. [2021-07-13 18:21:52,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 18:21:52,249 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 21.615384615384617) internal successors, (281), 13 states have internal predecessors, (281), 0 states have call successors, (0), 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 [2021-07-13 18:21:52,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:52,377 INFO L225 Difference]: With dead ends: 53420 [2021-07-13 18:21:52,377 INFO L226 Difference]: Without dead ends: 53420 [2021-07-13 18:21:52,378 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 121.4ms TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-07-13 18:21:52,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53420 states. [2021-07-13 18:21:53,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53420 to 34955. [2021-07-13 18:21:53,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34955 states, 34953 states have (on average 2.632163190570194) internal successors, (92002), 34954 states have internal predecessors, (92002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:53,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34955 states to 34955 states and 92002 transitions. [2021-07-13 18:21:53,456 INFO L78 Accepts]: Start accepts. Automaton has 34955 states and 92002 transitions. Word has length 302 [2021-07-13 18:21:53,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:53,456 INFO L482 AbstractCegarLoop]: Abstraction has 34955 states and 92002 transitions. [2021-07-13 18:21:53,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 21.615384615384617) internal successors, (281), 13 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:53,456 INFO L276 IsEmpty]: Start isEmpty. Operand 34955 states and 92002 transitions. [2021-07-13 18:21:53,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-07-13 18:21:53,511 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:53,511 INFO L508 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, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-13 18:21:53,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-13 18:21:53,712 INFO L430 AbstractCegarLoop]: === Iteration 26 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:53,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:53,712 INFO L82 PathProgramCache]: Analyzing trace with hash -636548490, now seen corresponding path program 5 times [2021-07-13 18:21:53,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:53,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549083571] [2021-07-13 18:21:53,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 15 proven. 409 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:21:53,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:53,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549083571] [2021-07-13 18:21:53,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549083571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:53,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209346781] [2021-07-13 18:21:53,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:21:54,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 18:21:54,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:21:54,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 18:21:54,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:54,499 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:21:54,581 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 15 proven. 385 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-07-13 18:21:54,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209346781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:54,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:54,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-07-13 18:21:54,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779535152] [2021-07-13 18:21:54,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 18:21:54,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:54,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 18:21:54,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 18:21:54,583 INFO L87 Difference]: Start difference. First operand 34955 states and 92002 transitions. Second operand has 13 states, 13 states have (on average 22.23076923076923) internal successors, (289), 13 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:54,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:54,961 INFO L93 Difference]: Finished difference Result 50680 states and 132431 transitions. [2021-07-13 18:21:54,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 18:21:54,961 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 22.23076923076923) internal successors, (289), 13 states have internal predecessors, (289), 0 states have call successors, (0), 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 303 [2021-07-13 18:21:54,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:55,079 INFO L225 Difference]: With dead ends: 50680 [2021-07-13 18:21:55,079 INFO L226 Difference]: Without dead ends: 50680 [2021-07-13 18:21:55,079 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 140.7ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-07-13 18:21:55,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50680 states. [2021-07-13 18:21:56,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50680 to 38115. [2021-07-13 18:21:56,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38115 states, 38113 states have (on average 2.637945058116653) internal successors, (100540), 38114 states have internal predecessors, (100540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:56,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38115 states to 38115 states and 100540 transitions. [2021-07-13 18:21:56,185 INFO L78 Accepts]: Start accepts. Automaton has 38115 states and 100540 transitions. Word has length 303 [2021-07-13 18:21:56,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:56,185 INFO L482 AbstractCegarLoop]: Abstraction has 38115 states and 100540 transitions. [2021-07-13 18:21:56,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 22.23076923076923) internal successors, (289), 13 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:56,185 INFO L276 IsEmpty]: Start isEmpty. Operand 38115 states and 100540 transitions. [2021-07-13 18:21:56,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-07-13 18:21:56,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:56,243 INFO L508 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, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-13 18:21:56,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:21:56,444 INFO L430 AbstractCegarLoop]: === Iteration 27 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:56,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:56,445 INFO L82 PathProgramCache]: Analyzing trace with hash -199868818, now seen corresponding path program 6 times [2021-07-13 18:21:56,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:56,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105650733] [2021-07-13 18:21:56,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:56,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 59 proven. 398 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-13 18:21:56,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:56,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105650733] [2021-07-13 18:21:56,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105650733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:56,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906097487] [2021-07-13 18:21:56,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:21:56,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 18:21:56,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:21:56,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 18:21:56,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 256 proven. 65 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-07-13 18:21:57,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906097487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:57,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:57,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2021-07-13 18:21:57,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660092416] [2021-07-13 18:21:57,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 18:21:57,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:57,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 18:21:57,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-07-13 18:21:57,496 INFO L87 Difference]: Start difference. First operand 38115 states and 100540 transitions. Second operand has 22 states, 22 states have (on average 22.40909090909091) internal successors, (493), 22 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:58,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:58,414 INFO L93 Difference]: Finished difference Result 63300 states and 165509 transitions. [2021-07-13 18:21:58,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 18:21:58,415 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 22.40909090909091) internal successors, (493), 22 states have internal predecessors, (493), 0 states have call successors, (0), 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 303 [2021-07-13 18:21:58,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:58,703 INFO L225 Difference]: With dead ends: 63300 [2021-07-13 18:21:58,703 INFO L226 Difference]: Without dead ends: 63300 [2021-07-13 18:21:58,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 328 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 745.9ms TimeCoverageRelationStatistics Valid=623, Invalid=2029, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 18:21:58,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63300 states. [2021-07-13 18:21:59,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63300 to 38375. [2021-07-13 18:21:59,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38375 states, 38373 states have (on average 2.639225497094311) internal successors, (101275), 38374 states have internal predecessors, (101275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:59,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38375 states to 38375 states and 101275 transitions. [2021-07-13 18:21:59,745 INFO L78 Accepts]: Start accepts. Automaton has 38375 states and 101275 transitions. Word has length 303 [2021-07-13 18:21:59,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:59,745 INFO L482 AbstractCegarLoop]: Abstraction has 38375 states and 101275 transitions. [2021-07-13 18:21:59,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 22.40909090909091) internal successors, (493), 22 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:59,746 INFO L276 IsEmpty]: Start isEmpty. Operand 38375 states and 101275 transitions. [2021-07-13 18:21:59,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-07-13 18:21:59,801 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:59,801 INFO L508 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] [2021-07-13 18:22:00,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 18:22:00,002 INFO L430 AbstractCegarLoop]: === Iteration 28 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:00,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:00,003 INFO L82 PathProgramCache]: Analyzing trace with hash -655121299, now seen corresponding path program 11 times [2021-07-13 18:22:00,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:00,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017627661] [2021-07-13 18:22:00,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:00,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 603 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-07-13 18:22:00,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:00,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017627661] [2021-07-13 18:22:00,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017627661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:00,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264814560] [2021-07-13 18:22:00,418 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 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 [2021-07-13 18:22:00,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 18:22:00,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:00,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 18:22:00,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:01,052 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:22:01,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264814560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:01,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:01,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-07-13 18:22:01,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596593632] [2021-07-13 18:22:01,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:22:01,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:01,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:22:01,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:22:01,055 INFO L87 Difference]: Start difference. First operand 38375 states and 101275 transitions. Second operand has 16 states, 16 states have (on average 20.375) internal successors, (326), 16 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:01,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:01,461 INFO L93 Difference]: Finished difference Result 45655 states and 119469 transitions. [2021-07-13 18:22:01,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 18:22:01,461 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 20.375) internal successors, (326), 16 states have internal predecessors, (326), 0 states have call successors, (0), 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 [2021-07-13 18:22:01,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:01,720 INFO L225 Difference]: With dead ends: 45655 [2021-07-13 18:22:01,720 INFO L226 Difference]: Without dead ends: 45655 [2021-07-13 18:22:01,720 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 422.1ms TimeCoverageRelationStatistics Valid=261, Invalid=609, Unknown=0, NotChecked=0, Total=870 [2021-07-13 18:22:01,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45655 states. [2021-07-13 18:22:02,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45655 to 38375. [2021-07-13 18:22:02,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38375 states, 38373 states have (on average 2.639225497094311) internal successors, (101275), 38374 states have internal predecessors, (101275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:02,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38375 states to 38375 states and 101275 transitions. [2021-07-13 18:22:02,517 INFO L78 Accepts]: Start accepts. Automaton has 38375 states and 101275 transitions. Word has length 304 [2021-07-13 18:22:02,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:02,517 INFO L482 AbstractCegarLoop]: Abstraction has 38375 states and 101275 transitions. [2021-07-13 18:22:02,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 20.375) internal successors, (326), 16 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:02,518 INFO L276 IsEmpty]: Start isEmpty. Operand 38375 states and 101275 transitions. [2021-07-13 18:22:02,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-07-13 18:22:02,573 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:02,573 INFO L508 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] [2021-07-13 18:22:02,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:02,774 INFO L430 AbstractCegarLoop]: === Iteration 29 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:02,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:02,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1091302659, now seen corresponding path program 12 times [2021-07-13 18:22:02,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:02,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041291188] [2021-07-13 18:22:02,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:02,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:02,941 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:22:02,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:02,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041291188] [2021-07-13 18:22:02,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041291188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:02,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022329131] [2021-07-13 18:22:02,941 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 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 [2021-07-13 18:22:03,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 18:22:03,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:03,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 18:22:03,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:03,871 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:22:03,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022329131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:03,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:03,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-07-13 18:22:03,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037254192] [2021-07-13 18:22:03,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:22:03,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:03,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:22:03,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:22:03,872 INFO L87 Difference]: Start difference. First operand 38375 states and 101275 transitions. Second operand has 16 states, 16 states have (on average 20.375) internal successors, (326), 16 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:04,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:04,279 INFO L93 Difference]: Finished difference Result 52135 states and 136332 transitions. [2021-07-13 18:22:04,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 18:22:04,279 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 20.375) internal successors, (326), 16 states have internal predecessors, (326), 0 states have call successors, (0), 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 [2021-07-13 18:22:04,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:04,407 INFO L225 Difference]: With dead ends: 52135 [2021-07-13 18:22:04,407 INFO L226 Difference]: Without dead ends: 52135 [2021-07-13 18:22:04,408 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 182.7ms TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2021-07-13 18:22:04,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52135 states. [2021-07-13 18:22:05,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52135 to 40195. [2021-07-13 18:22:05,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40195 states, 40193 states have (on average 2.642151618441022) internal successors, (106196), 40194 states have internal predecessors, (106196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:05,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40195 states to 40195 states and 106196 transitions. [2021-07-13 18:22:05,492 INFO L78 Accepts]: Start accepts. Automaton has 40195 states and 106196 transitions. Word has length 304 [2021-07-13 18:22:05,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:05,492 INFO L482 AbstractCegarLoop]: Abstraction has 40195 states and 106196 transitions. [2021-07-13 18:22:05,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 20.375) internal successors, (326), 16 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:05,492 INFO L276 IsEmpty]: Start isEmpty. Operand 40195 states and 106196 transitions. [2021-07-13 18:22:05,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-07-13 18:22:05,550 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:05,551 INFO L508 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] [2021-07-13 18:22:05,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 18:22:05,752 INFO L430 AbstractCegarLoop]: === Iteration 30 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:05,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:05,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1253014483, now seen corresponding path program 13 times [2021-07-13 18:22:05,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:05,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206373134] [2021-07-13 18:22:05,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:05,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:05,913 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:22:05,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:05,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206373134] [2021-07-13 18:22:05,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206373134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:05,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306085563] [2021-07-13 18:22:05,914 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 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 [2021-07-13 18:22:06,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:06,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 18:22:06,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:06,483 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:22:06,604 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:22:06,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306085563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:06,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:06,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-07-13 18:22:06,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682343586] [2021-07-13 18:22:06,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:22:06,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:06,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:22:06,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:22:06,605 INFO L87 Difference]: Start difference. First operand 40195 states and 106196 transitions. Second operand has 16 states, 16 states have (on average 20.375) internal successors, (326), 16 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:06,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:06,999 INFO L93 Difference]: Finished difference Result 52985 states and 139007 transitions. [2021-07-13 18:22:06,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 18:22:07,000 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 20.375) internal successors, (326), 16 states have internal predecessors, (326), 0 states have call successors, (0), 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 [2021-07-13 18:22:07,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:07,120 INFO L225 Difference]: With dead ends: 52985 [2021-07-13 18:22:07,121 INFO L226 Difference]: Without dead ends: 52985 [2021-07-13 18:22:07,121 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 178.1ms TimeCoverageRelationStatistics Valid=222, Invalid=590, Unknown=0, NotChecked=0, Total=812 [2021-07-13 18:22:07,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52985 states. [2021-07-13 18:22:08,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52985 to 43095. [2021-07-13 18:22:08,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43095 states, 43093 states have (on average 2.6470888543382918) internal successors, (114071), 43094 states have internal predecessors, (114071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:08,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43095 states to 43095 states and 114071 transitions. [2021-07-13 18:22:08,291 INFO L78 Accepts]: Start accepts. Automaton has 43095 states and 114071 transitions. Word has length 304 [2021-07-13 18:22:08,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:08,291 INFO L482 AbstractCegarLoop]: Abstraction has 43095 states and 114071 transitions. [2021-07-13 18:22:08,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 20.375) internal successors, (326), 16 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:08,292 INFO L276 IsEmpty]: Start isEmpty. Operand 43095 states and 114071 transitions. [2021-07-13 18:22:08,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-07-13 18:22:08,355 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:08,355 INFO L508 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] [2021-07-13 18:22:08,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:08,556 INFO L430 AbstractCegarLoop]: === Iteration 31 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:08,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:08,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1931542652, now seen corresponding path program 8 times [2021-07-13 18:22:08,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:08,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903622251] [2021-07-13 18:22:08,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:08,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:22:08,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:08,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903622251] [2021-07-13 18:22:08,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903622251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:08,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066700824] [2021-07-13 18:22:08,764 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 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 [2021-07-13 18:22:08,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:22:08,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:08,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:22:08,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:09,359 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:22:09,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:22:09,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066700824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:09,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:09,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:22:09,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225466558] [2021-07-13 18:22:09,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:22:09,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:09,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:22:09,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:22:09,488 INFO L87 Difference]: Start difference. First operand 43095 states and 114071 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) [2021-07-13 18:22:09,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:09,999 INFO L93 Difference]: Finished difference Result 52842 states and 139004 transitions. [2021-07-13 18:22:09,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:22:10,000 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 [2021-07-13 18:22:10,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:10,123 INFO L225 Difference]: With dead ends: 52842 [2021-07-13 18:22:10,124 INFO L226 Difference]: Without dead ends: 52842 [2021-07-13 18:22:10,124 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 296.7ms TimeCoverageRelationStatistics Valid=427, Invalid=905, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 18:22:10,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52842 states. [2021-07-13 18:22:11,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52842 to 46410. [2021-07-13 18:22:11,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46410 states, 46408 states have (on average 2.6456429925874847) internal successors, (122779), 46409 states have internal predecessors, (122779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:11,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46410 states to 46410 states and 122779 transitions. [2021-07-13 18:22:11,334 INFO L78 Accepts]: Start accepts. Automaton has 46410 states and 122779 transitions. Word has length 334 [2021-07-13 18:22:11,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:11,335 INFO L482 AbstractCegarLoop]: Abstraction has 46410 states and 122779 transitions. [2021-07-13 18:22:11,335 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) [2021-07-13 18:22:11,335 INFO L276 IsEmpty]: Start isEmpty. Operand 46410 states and 122779 transitions. [2021-07-13 18:22:11,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-07-13 18:22:11,406 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:11,406 INFO L508 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] [2021-07-13 18:22:11,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-13 18:22:11,609 INFO L430 AbstractCegarLoop]: === Iteration 32 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:11,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:11,609 INFO L82 PathProgramCache]: Analyzing trace with hash 572939878, now seen corresponding path program 7 times [2021-07-13 18:22:11,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:11,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270946387] [2021-07-13 18:22:11,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:11,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 599 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:22:11,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:11,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270946387] [2021-07-13 18:22:11,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270946387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:11,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567955365] [2021-07-13 18:22:11,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:11,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:11,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:22:11,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:12,176 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:22:12,543 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 575 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-07-13 18:22:12,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567955365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:12,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:12,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-07-13 18:22:12,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466653702] [2021-07-13 18:22:12,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 18:22:12,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:12,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 18:22:12,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:22:12,545 INFO L87 Difference]: Start difference. First operand 46410 states and 122779 transitions. Second operand has 15 states, 15 states have (on average 21.6) internal successors, (324), 15 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:12,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:12,974 INFO L93 Difference]: Finished difference Result 61050 states and 159740 transitions. [2021-07-13 18:22:12,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 18:22:12,975 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 21.6) internal successors, (324), 15 states have internal predecessors, (324), 0 states have call successors, (0), 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 [2021-07-13 18:22:12,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:13,114 INFO L225 Difference]: With dead ends: 61050 [2021-07-13 18:22:13,114 INFO L226 Difference]: Without dead ends: 61050 [2021-07-13 18:22:13,114 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 178.0ms TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2021-07-13 18:22:13,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61050 states. [2021-07-13 18:22:14,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61050 to 43510. [2021-07-13 18:22:14,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43510 states, 43508 states have (on average 2.640985565872943) internal successors, (114904), 43509 states have internal predecessors, (114904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:14,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43510 states to 43510 states and 114904 transitions. [2021-07-13 18:22:14,278 INFO L78 Accepts]: Start accepts. Automaton has 43510 states and 114904 transitions. Word has length 338 [2021-07-13 18:22:14,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:14,278 INFO L482 AbstractCegarLoop]: Abstraction has 43510 states and 114904 transitions. [2021-07-13 18:22:14,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 21.6) internal successors, (324), 15 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:14,278 INFO L276 IsEmpty]: Start isEmpty. Operand 43510 states and 114904 transitions. [2021-07-13 18:22:14,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-07-13 18:22:14,348 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:14,348 INFO L508 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] [2021-07-13 18:22:14,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:14,551 INFO L430 AbstractCegarLoop]: === Iteration 33 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:14,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:14,552 INFO L82 PathProgramCache]: Analyzing trace with hash -941095044, now seen corresponding path program 8 times [2021-07-13 18:22:14,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:14,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283369977] [2021-07-13 18:22:14,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:14,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:14,713 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 599 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:22:14,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:14,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283369977] [2021-07-13 18:22:14,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283369977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:14,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81164136] [2021-07-13 18:22:14,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:14,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:22:14,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:14,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:22:14,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:15,074 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:22:15,549 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 575 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-07-13 18:22:15,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81164136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:15,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:15,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-07-13 18:22:15,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254698144] [2021-07-13 18:22:15,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 18:22:15,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:15,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 18:22:15,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:22:15,552 INFO L87 Difference]: Start difference. First operand 43510 states and 114904 transitions. Second operand has 15 states, 15 states have (on average 21.6) internal successors, (324), 15 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:15,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:15,976 INFO L93 Difference]: Finished difference Result 58330 states and 152858 transitions. [2021-07-13 18:22:15,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 18:22:15,976 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 21.6) internal successors, (324), 15 states have internal predecessors, (324), 0 states have call successors, (0), 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 [2021-07-13 18:22:15,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:16,108 INFO L225 Difference]: With dead ends: 58330 [2021-07-13 18:22:16,108 INFO L226 Difference]: Without dead ends: 58330 [2021-07-13 18:22:16,109 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 168.0ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-07-13 18:22:16,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58330 states. [2021-07-13 18:22:17,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58330 to 43510. [2021-07-13 18:22:17,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43510 states, 43508 states have (on average 2.640985565872943) internal successors, (114904), 43509 states have internal predecessors, (114904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:17,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43510 states to 43510 states and 114904 transitions. [2021-07-13 18:22:17,284 INFO L78 Accepts]: Start accepts. Automaton has 43510 states and 114904 transitions. Word has length 338 [2021-07-13 18:22:17,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:17,285 INFO L482 AbstractCegarLoop]: Abstraction has 43510 states and 114904 transitions. [2021-07-13 18:22:17,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 21.6) internal successors, (324), 15 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:17,285 INFO L276 IsEmpty]: Start isEmpty. Operand 43510 states and 114904 transitions. [2021-07-13 18:22:17,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-07-13 18:22:17,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:17,353 INFO L508 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] [2021-07-13 18:22:17,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-13 18:22:17,554 INFO L430 AbstractCegarLoop]: === Iteration 34 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:17,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:17,554 INFO L82 PathProgramCache]: Analyzing trace with hash -202109402, now seen corresponding path program 9 times [2021-07-13 18:22:17,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:17,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533860877] [2021-07-13 18:22:17,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:17,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:17,714 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 599 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:22:17,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:17,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533860877] [2021-07-13 18:22:17,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533860877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:17,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033733356] [2021-07-13 18:22:17,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:18,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 18:22:18,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:18,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:22:18,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:18,700 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 575 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-07-13 18:22:18,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033733356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:18,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:18,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-07-13 18:22:18,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245191238] [2021-07-13 18:22:18,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 18:22:18,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:18,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 18:22:18,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:22:18,703 INFO L87 Difference]: Start difference. First operand 43510 states and 114904 transitions. Second operand has 15 states, 15 states have (on average 21.6) internal successors, (324), 15 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:19,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:19,134 INFO L93 Difference]: Finished difference Result 63500 states and 166757 transitions. [2021-07-13 18:22:19,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 18:22:19,134 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 21.6) internal successors, (324), 15 states have internal predecessors, (324), 0 states have call successors, (0), 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 [2021-07-13 18:22:19,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:19,282 INFO L225 Difference]: With dead ends: 63500 [2021-07-13 18:22:19,283 INFO L226 Difference]: Without dead ends: 63500 [2021-07-13 18:22:19,283 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 174.0ms TimeCoverageRelationStatistics Valid=223, Invalid=647, Unknown=0, NotChecked=0, Total=870 [2021-07-13 18:22:19,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63500 states. [2021-07-13 18:22:20,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63500 to 46410. [2021-07-13 18:22:20,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46410 states, 46408 states have (on average 2.6456429925874847) internal successors, (122779), 46409 states have internal predecessors, (122779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:20,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46410 states to 46410 states and 122779 transitions. [2021-07-13 18:22:20,572 INFO L78 Accepts]: Start accepts. Automaton has 46410 states and 122779 transitions. Word has length 338 [2021-07-13 18:22:20,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:20,572 INFO L482 AbstractCegarLoop]: Abstraction has 46410 states and 122779 transitions. [2021-07-13 18:22:20,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 21.6) internal successors, (324), 15 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:20,572 INFO L276 IsEmpty]: Start isEmpty. Operand 46410 states and 122779 transitions. [2021-07-13 18:22:20,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-07-13 18:22:20,652 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:20,653 INFO L508 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] [2021-07-13 18:22:20,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:20,853 INFO L430 AbstractCegarLoop]: === Iteration 35 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:20,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:20,854 INFO L82 PathProgramCache]: Analyzing trace with hash -575359830, now seen corresponding path program 10 times [2021-07-13 18:22:20,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:20,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433655227] [2021-07-13 18:22:20,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:20,998 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:22:20,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:20,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433655227] [2021-07-13 18:22:20,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433655227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:20,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863411958] [2021-07-13 18:22:20,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 18:22:21,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:22:21,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:21,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:22:21,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:22,028 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:22:22,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863411958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:22,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:22,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-07-13 18:22:22,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668378638] [2021-07-13 18:22:22,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 18:22:22,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:22,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 18:22:22,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:22:22,030 INFO L87 Difference]: Start difference. First operand 46410 states and 122779 transitions. Second operand has 15 states, 15 states have (on average 21.666666666666668) internal successors, (325), 15 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:22,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:22,450 INFO L93 Difference]: Finished difference Result 65275 states and 170986 transitions. [2021-07-13 18:22:22,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 18:22:22,450 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 21.666666666666668) internal successors, (325), 15 states have internal predecessors, (325), 0 states have call successors, (0), 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 [2021-07-13 18:22:22,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:22,600 INFO L225 Difference]: With dead ends: 65275 [2021-07-13 18:22:22,600 INFO L226 Difference]: Without dead ends: 65275 [2021-07-13 18:22:22,601 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 172.9ms TimeCoverageRelationStatistics Valid=176, Invalid=526, Unknown=0, NotChecked=0, Total=702 [2021-07-13 18:22:22,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65275 states. [2021-07-13 18:22:23,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65275 to 49570. [2021-07-13 18:22:23,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49570 states, 49568 states have (on average 2.649229341510652) internal successors, (131317), 49569 states have internal predecessors, (131317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:23,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49570 states to 49570 states and 131317 transitions. [2021-07-13 18:22:23,961 INFO L78 Accepts]: Start accepts. Automaton has 49570 states and 131317 transitions. Word has length 338 [2021-07-13 18:22:23,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:23,962 INFO L482 AbstractCegarLoop]: Abstraction has 49570 states and 131317 transitions. [2021-07-13 18:22:23,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 21.666666666666668) internal successors, (325), 15 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:23,962 INFO L276 IsEmpty]: Start isEmpty. Operand 49570 states and 131317 transitions. [2021-07-13 18:22:24,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-07-13 18:22:24,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:24,047 INFO L508 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] [2021-07-13 18:22:24,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-13 18:22:24,249 INFO L430 AbstractCegarLoop]: === Iteration 36 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:24,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:24,249 INFO L82 PathProgramCache]: Analyzing trace with hash 163625812, now seen corresponding path program 11 times [2021-07-13 18:22:24,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:24,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266966159] [2021-07-13 18:22:24,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:22:24,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:24,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266966159] [2021-07-13 18:22:24,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266966159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:24,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522882428] [2021-07-13 18:22:24,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:24,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 18:22:24,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:24,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:22:24,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:25,335 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:22:25,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522882428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:25,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:25,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-07-13 18:22:25,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187118673] [2021-07-13 18:22:25,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 18:22:25,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:25,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 18:22:25,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:22:25,337 INFO L87 Difference]: Start difference. First operand 49570 states and 131317 transitions. Second operand has 15 states, 15 states have (on average 21.666666666666668) internal successors, (325), 15 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:25,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:25,807 INFO L93 Difference]: Finished difference Result 77225 states and 203730 transitions. [2021-07-13 18:22:25,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 18:22:25,808 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 21.666666666666668) internal successors, (325), 15 states have internal predecessors, (325), 0 states have call successors, (0), 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 [2021-07-13 18:22:25,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:26,199 INFO L225 Difference]: With dead ends: 77225 [2021-07-13 18:22:26,200 INFO L226 Difference]: Without dead ends: 77225 [2021-07-13 18:22:26,200 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 152.8ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-07-13 18:22:26,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77225 states. [2021-07-13 18:22:27,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77225 to 52470. [2021-07-13 18:22:27,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52470 states, 52468 states have (on average 2.652893192040863) internal successors, (139192), 52469 states have internal predecessors, (139192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:27,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52470 states to 52470 states and 139192 transitions. [2021-07-13 18:22:27,584 INFO L78 Accepts]: Start accepts. Automaton has 52470 states and 139192 transitions. Word has length 338 [2021-07-13 18:22:27,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:27,585 INFO L482 AbstractCegarLoop]: Abstraction has 52470 states and 139192 transitions. [2021-07-13 18:22:27,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 21.666666666666668) internal successors, (325), 15 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:27,585 INFO L276 IsEmpty]: Start isEmpty. Operand 52470 states and 139192 transitions. [2021-07-13 18:22:27,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-07-13 18:22:27,685 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:27,685 INFO L508 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] [2021-07-13 18:22:27,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 18:22:27,893 INFO L430 AbstractCegarLoop]: === Iteration 37 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:27,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:27,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1972205297, now seen corresponding path program 14 times [2021-07-13 18:22:27,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:27,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284198627] [2021-07-13 18:22:27,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:27,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:28,082 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 828 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-07-13 18:22:28,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:28,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284198627] [2021-07-13 18:22:28,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284198627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:28,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716944877] [2021-07-13 18:22:28,083 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 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 [2021-07-13 18:22:28,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:22:28,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:28,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:22:28,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:28,606 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:22:28,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716944877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:28,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:28,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-13 18:22:28,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134767068] [2021-07-13 18:22:28,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:22:28,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:28,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:22:28,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:22:28,608 INFO L87 Difference]: Start difference. First operand 52470 states and 139192 transitions. Second operand has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:29,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:29,244 INFO L93 Difference]: Finished difference Result 62400 states and 164204 transitions. [2021-07-13 18:22:29,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 18:22:29,245 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 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 [2021-07-13 18:22:29,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:29,361 INFO L225 Difference]: With dead ends: 62400 [2021-07-13 18:22:29,362 INFO L226 Difference]: Without dead ends: 62400 [2021-07-13 18:22:29,362 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 402.1ms TimeCoverageRelationStatistics Valid=338, Invalid=784, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 18:22:29,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62400 states. [2021-07-13 18:22:30,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62400 to 53550. [2021-07-13 18:22:30,545 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) [2021-07-13 18:22:30,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53550 states to 53550 states and 142146 transitions. [2021-07-13 18:22:30,720 INFO L78 Accepts]: Start accepts. Automaton has 53550 states and 142146 transitions. Word has length 339 [2021-07-13 18:22:30,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:30,720 INFO L482 AbstractCegarLoop]: Abstraction has 53550 states and 142146 transitions. [2021-07-13 18:22:30,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:30,721 INFO L276 IsEmpty]: Start isEmpty. Operand 53550 states and 142146 transitions. [2021-07-13 18:22:30,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-07-13 18:22:30,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:30,850 INFO L508 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] [2021-07-13 18:22:31,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-13 18:22:31,065 INFO L430 AbstractCegarLoop]: === Iteration 38 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:31,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:31,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1241727161, now seen corresponding path program 15 times [2021-07-13 18:22:31,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:31,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511526080] [2021-07-13 18:22:31,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:31,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:31,234 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:22:31,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:31,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511526080] [2021-07-13 18:22:31,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511526080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:31,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568683568] [2021-07-13 18:22:31,235 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 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 [2021-07-13 18:22:31,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 18:22:31,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:31,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:22:31,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:32,273 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:22:32,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568683568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:32,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:32,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-13 18:22:32,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902798892] [2021-07-13 18:22:32,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:22:32,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:32,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:22:32,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:22:32,275 INFO L87 Difference]: Start difference. First operand 53550 states and 142146 transitions. Second operand has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:32,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:32,740 INFO L93 Difference]: Finished difference Result 66585 states and 174621 transitions. [2021-07-13 18:22:32,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 18:22:32,741 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 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 [2021-07-13 18:22:32,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:32,891 INFO L225 Difference]: With dead ends: 66585 [2021-07-13 18:22:32,891 INFO L226 Difference]: Without dead ends: 66585 [2021-07-13 18:22:32,892 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 214.0ms TimeCoverageRelationStatistics Valid=283, Invalid=709, Unknown=0, NotChecked=0, Total=992 [2021-07-13 18:22:33,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66585 states. [2021-07-13 18:22:34,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66585 to 52470. [2021-07-13 18:22:34,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52470 states, 52468 states have (on average 2.652893192040863) internal successors, (139192), 52469 states have internal predecessors, (139192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:34,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52470 states to 52470 states and 139192 transitions. [2021-07-13 18:22:34,245 INFO L78 Accepts]: Start accepts. Automaton has 52470 states and 139192 transitions. Word has length 339 [2021-07-13 18:22:34,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:34,246 INFO L482 AbstractCegarLoop]: Abstraction has 52470 states and 139192 transitions. [2021-07-13 18:22:34,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:34,246 INFO L276 IsEmpty]: Start isEmpty. Operand 52470 states and 139192 transitions. [2021-07-13 18:22:34,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-07-13 18:22:34,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:34,337 INFO L508 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] [2021-07-13 18:22:34,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-13 18:22:34,538 INFO L430 AbstractCegarLoop]: === Iteration 39 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:34,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:34,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1306816177, now seen corresponding path program 16 times [2021-07-13 18:22:34,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:34,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484879552] [2021-07-13 18:22:34,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:34,713 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:22:34,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:34,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484879552] [2021-07-13 18:22:34,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484879552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:34,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722319034] [2021-07-13 18:22:34,713 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 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 [2021-07-13 18:22:35,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:22:35,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:35,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:22:35,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:35,729 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:22:35,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722319034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:35,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:35,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-13 18:22:35,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795355914] [2021-07-13 18:22:35,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:22:35,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:35,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:22:35,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:22:35,730 INFO L87 Difference]: Start difference. First operand 52470 states and 139192 transitions. Second operand has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:36,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:36,460 INFO L93 Difference]: Finished difference Result 68675 states and 180658 transitions. [2021-07-13 18:22:36,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 18:22:36,461 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 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 [2021-07-13 18:22:36,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:36,613 INFO L225 Difference]: With dead ends: 68675 [2021-07-13 18:22:36,613 INFO L226 Difference]: Without dead ends: 68675 [2021-07-13 18:22:36,614 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 221.2ms TimeCoverageRelationStatistics Valid=292, Invalid=764, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 18:22:36,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68675 states. [2021-07-13 18:22:37,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68675 to 55370. [2021-07-13 18:22:37,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55370 states, 55368 states have (on average 2.6561732408611474) internal successors, (147067), 55369 states have internal predecessors, (147067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:38,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55370 states to 55370 states and 147067 transitions. [2021-07-13 18:22:38,111 INFO L78 Accepts]: Start accepts. Automaton has 55370 states and 147067 transitions. Word has length 339 [2021-07-13 18:22:38,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:38,111 INFO L482 AbstractCegarLoop]: Abstraction has 55370 states and 147067 transitions. [2021-07-13 18:22:38,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:38,111 INFO L276 IsEmpty]: Start isEmpty. Operand 55370 states and 147067 transitions. [2021-07-13 18:22:38,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-07-13 18:22:38,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:38,211 INFO L508 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] [2021-07-13 18:22:38,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 18:22:38,412 INFO L430 AbstractCegarLoop]: === Iteration 40 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:38,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:38,412 INFO L82 PathProgramCache]: Analyzing trace with hash 643833977, now seen corresponding path program 17 times [2021-07-13 18:22:38,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:38,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073451776] [2021-07-13 18:22:38,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:38,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:22:38,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:38,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073451776] [2021-07-13 18:22:38,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073451776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:38,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489858557] [2021-07-13 18:22:38,580 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 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 [2021-07-13 18:22:38,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 18:22:38,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:38,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:22:38,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:22:39,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489858557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:39,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:39,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-13 18:22:39,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064749435] [2021-07-13 18:22:39,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:22:39,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:39,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:22:39,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:22:39,199 INFO L87 Difference]: Start difference. First operand 55370 states and 147067 transitions. Second operand has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:39,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:39,895 INFO L93 Difference]: Finished difference Result 71265 states and 187341 transitions. [2021-07-13 18:22:39,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 18:22:39,896 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 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 [2021-07-13 18:22:39,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:40,071 INFO L225 Difference]: With dead ends: 71265 [2021-07-13 18:22:40,071 INFO L226 Difference]: Without dead ends: 71265 [2021-07-13 18:22:40,072 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 228.3ms TimeCoverageRelationStatistics Valid=301, Invalid=821, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 18:22:40,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71265 states. [2021-07-13 18:22:41,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71265 to 58270. [2021-07-13 18:22:41,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58270 states, 58268 states have (on average 2.659126793437221) internal successors, (154942), 58269 states have internal predecessors, (154942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:41,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58270 states to 58270 states and 154942 transitions. [2021-07-13 18:22:41,565 INFO L78 Accepts]: Start accepts. Automaton has 58270 states and 154942 transitions. Word has length 339 [2021-07-13 18:22:41,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:41,566 INFO L482 AbstractCegarLoop]: Abstraction has 58270 states and 154942 transitions. [2021-07-13 18:22:41,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:41,566 INFO L276 IsEmpty]: Start isEmpty. Operand 58270 states and 154942 transitions. [2021-07-13 18:22:41,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-07-13 18:22:41,668 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:41,668 INFO L508 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] [2021-07-13 18:22:41,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 18:22:41,869 INFO L430 AbstractCegarLoop]: === Iteration 41 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:41,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:41,869 INFO L82 PathProgramCache]: Analyzing trace with hash -870200945, now seen corresponding path program 18 times [2021-07-13 18:22:41,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:41,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249606744] [2021-07-13 18:22:41,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:42,035 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:22:42,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:42,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249606744] [2021-07-13 18:22:42,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249606744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:42,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429142687] [2021-07-13 18:22:42,036 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 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 [2021-07-13 18:22:42,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 18:22:42,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:42,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:22:42,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:22:43,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429142687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:43,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:43,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-13 18:22:43,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142386556] [2021-07-13 18:22:43,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:22:43,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:43,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:22:43,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:22:43,300 INFO L87 Difference]: Start difference. First operand 58270 states and 154942 transitions. Second operand has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:44,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:44,031 INFO L93 Difference]: Finished difference Result 75645 states and 198750 transitions. [2021-07-13 18:22:44,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 18:22:44,032 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 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 [2021-07-13 18:22:44,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:44,195 INFO L225 Difference]: With dead ends: 75645 [2021-07-13 18:22:44,196 INFO L226 Difference]: Without dead ends: 75645 [2021-07-13 18:22:44,196 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 227.0ms TimeCoverageRelationStatistics Valid=310, Invalid=880, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 18:22:44,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75645 states. [2021-07-13 18:22:45,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75645 to 60090. [2021-07-13 18:22:45,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60090 states, 60088 states have (on average 2.660481294101984) internal successors, (159863), 60089 states have internal predecessors, (159863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:45,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60090 states to 60090 states and 159863 transitions. [2021-07-13 18:22:45,788 INFO L78 Accepts]: Start accepts. Automaton has 60090 states and 159863 transitions. Word has length 339 [2021-07-13 18:22:45,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:45,789 INFO L482 AbstractCegarLoop]: Abstraction has 60090 states and 159863 transitions. [2021-07-13 18:22:45,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:45,789 INFO L276 IsEmpty]: Start isEmpty. Operand 60090 states and 159863 transitions. [2021-07-13 18:22:45,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-07-13 18:22:45,897 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:45,897 INFO L508 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] [2021-07-13 18:22:46,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-07-13 18:22:46,098 INFO L430 AbstractCegarLoop]: === Iteration 42 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:46,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:46,099 INFO L82 PathProgramCache]: Analyzing trace with hash -131215303, now seen corresponding path program 19 times [2021-07-13 18:22:46,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:46,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410543441] [2021-07-13 18:22:46,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:46,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:46,260 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:22:46,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:46,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410543441] [2021-07-13 18:22:46,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410543441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:46,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881080637] [2021-07-13 18:22:46,260 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 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 [2021-07-13 18:22:46,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:46,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:22:46,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:46,984 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:22:46,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881080637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:46,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:46,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-13 18:22:46,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415473891] [2021-07-13 18:22:46,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:22:46,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:46,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:22:46,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:22:46,987 INFO L87 Difference]: Start difference. First operand 60090 states and 159863 transitions. Second operand has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:47,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:47,531 INFO L93 Difference]: Finished difference Result 75685 states and 199547 transitions. [2021-07-13 18:22:47,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:22:47,532 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 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 [2021-07-13 18:22:47,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:47,705 INFO L225 Difference]: With dead ends: 75685 [2021-07-13 18:22:47,705 INFO L226 Difference]: Without dead ends: 75685 [2021-07-13 18:22:47,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 225.7ms TimeCoverageRelationStatistics Valid=319, Invalid=941, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 18:22:47,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75685 states. [2021-07-13 18:22:49,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75685 to 59010. [2021-07-13 18:22:49,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59010 states, 59008 states have (on average 2.659114018438178) internal successors, (156909), 59009 states have internal predecessors, (156909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:49,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59010 states to 59010 states and 156909 transitions. [2021-07-13 18:22:49,274 INFO L78 Accepts]: Start accepts. Automaton has 59010 states and 156909 transitions. Word has length 339 [2021-07-13 18:22:49,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:49,275 INFO L482 AbstractCegarLoop]: Abstraction has 59010 states and 156909 transitions. [2021-07-13 18:22:49,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:49,275 INFO L276 IsEmpty]: Start isEmpty. Operand 59010 states and 156909 transitions. [2021-07-13 18:22:49,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2021-07-13 18:22:49,377 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:49,378 INFO L508 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] [2021-07-13 18:22:49,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:49,578 INFO L430 AbstractCegarLoop]: === Iteration 43 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:49,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:49,579 INFO L82 PathProgramCache]: Analyzing trace with hash 555481760, now seen corresponding path program 9 times [2021-07-13 18:22:49,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:49,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869537464] [2021-07-13 18:22:49,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:50,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:22:50,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:50,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869537464] [2021-07-13 18:22:50,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869537464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:50,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573748033] [2021-07-13 18:22:50,132 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 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 [2021-07-13 18:22:50,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 18:22:50,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:50,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:22:50,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:22:51,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573748033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:51,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:51,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-07-13 18:22:51,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297722894] [2021-07-13 18:22:51,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 18:22:51,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:51,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 18:22:51,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-07-13 18:22:51,052 INFO L87 Difference]: Start difference. First operand 59010 states and 156909 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) [2021-07-13 18:22:51,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:51,864 INFO L93 Difference]: Finished difference Result 69362 states and 183271 transitions. [2021-07-13 18:22:51,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 18:22:51,865 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 [2021-07-13 18:22:51,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:52,019 INFO L225 Difference]: With dead ends: 69362 [2021-07-13 18:22:52,019 INFO L226 Difference]: Without dead ends: 69362 [2021-07-13 18:22:52,019 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 350.0ms TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 18:22:52,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69362 states. [2021-07-13 18:22:53,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69362 to 62325. [2021-07-13 18:22:53,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62325 states, 62323 states have (on average 2.6573977504292157) internal successors, (165617), 62324 states have internal predecessors, (165617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:53,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62325 states to 62325 states and 165617 transitions. [2021-07-13 18:22:53,524 INFO L78 Accepts]: Start accepts. Automaton has 62325 states and 165617 transitions. Word has length 369 [2021-07-13 18:22:53,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:53,524 INFO L482 AbstractCegarLoop]: Abstraction has 62325 states and 165617 transitions. [2021-07-13 18:22:53,524 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) [2021-07-13 18:22:53,525 INFO L276 IsEmpty]: Start isEmpty. Operand 62325 states and 165617 transitions. [2021-07-13 18:22:53,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2021-07-13 18:22:53,640 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:53,640 INFO L508 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, 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] [2021-07-13 18:22:53,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:53,841 INFO L430 AbstractCegarLoop]: === Iteration 44 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:53,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:53,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1012031265, now seen corresponding path program 12 times [2021-07-13 18:22:53,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:53,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928612848] [2021-07-13 18:22:53,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:53,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:53,979 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 18 proven. 629 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-07-13 18:22:53,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:53,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928612848] [2021-07-13 18:22:53,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928612848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:53,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378700648] [2021-07-13 18:22:53,980 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 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 [2021-07-13 18:22:54,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 18:22:54,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:54,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:22:54,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:54,578 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-07-13 18:22:54,925 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 18 proven. 605 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-07-13 18:22:54,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378700648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:54,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:54,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-07-13 18:22:54,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005865327] [2021-07-13 18:22:54,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 18:22:54,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:54,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 18:22:54,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 18:22:54,927 INFO L87 Difference]: Start difference. First operand 62325 states and 165617 transitions. Second operand has 14 states, 14 states have (on average 23.071428571428573) internal successors, (323), 14 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:55,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:55,744 INFO L93 Difference]: Finished difference Result 104975 states and 276574 transitions. [2021-07-13 18:22:55,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 18:22:55,744 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 23.071428571428573) internal successors, (323), 14 states have internal predecessors, (323), 0 states have call successors, (0), 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 372 [2021-07-13 18:22:55,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:56,022 INFO L225 Difference]: With dead ends: 104975 [2021-07-13 18:22:56,022 INFO L226 Difference]: Without dead ends: 104975 [2021-07-13 18:22:56,022 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 144.1ms TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-07-13 18:22:56,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104975 states. [2021-07-13 18:22:57,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104975 to 71885. [2021-07-13 18:22:57,792 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) [2021-07-13 18:22:57,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71885 states to 71885 states and 191555 transitions. [2021-07-13 18:22:57,987 INFO L78 Accepts]: Start accepts. Automaton has 71885 states and 191555 transitions. Word has length 372 [2021-07-13 18:22:57,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:57,987 INFO L482 AbstractCegarLoop]: Abstraction has 71885 states and 191555 transitions. [2021-07-13 18:22:57,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 23.071428571428573) internal successors, (323), 14 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:57,988 INFO L276 IsEmpty]: Start isEmpty. Operand 71885 states and 191555 transitions. [2021-07-13 18:22:58,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-07-13 18:22:58,461 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:58,470 INFO L508 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] [2021-07-13 18:22:58,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:58,697 INFO L430 AbstractCegarLoop]: === Iteration 45 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:58,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:58,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1698366582, now seen corresponding path program 13 times [2021-07-13 18:22:58,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:58,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949674356] [2021-07-13 18:22:58,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:58,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:58,857 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 824 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:22:58,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:58,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949674356] [2021-07-13 18:22:58,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949674356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:58,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33274420] [2021-07-13 18:22:58,857 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 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 [2021-07-13 18:22:58,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:58,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:22:58,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:59,419 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 800 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-07-13 18:22:59,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33274420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:59,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:59,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-07-13 18:22:59,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340255694] [2021-07-13 18:22:59,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:22:59,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:59,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:22:59,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:22:59,421 INFO L87 Difference]: Start difference. First operand 71885 states and 191555 transitions. Second operand has 17 states, 17 states have (on average 21.11764705882353) internal successors, (359), 17 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:00,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:00,262 INFO L93 Difference]: Finished difference Result 89825 states and 236702 transitions. [2021-07-13 18:23:00,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 18:23:00,263 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.11764705882353) internal successors, (359), 17 states have internal predecessors, (359), 0 states have call successors, (0), 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 [2021-07-13 18:23:00,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:00,484 INFO L225 Difference]: With dead ends: 89825 [2021-07-13 18:23:00,484 INFO L226 Difference]: Without dead ends: 89825 [2021-07-13 18:23:00,484 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 220.4ms TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 18:23:00,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89825 states. [2021-07-13 18:23:02,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89825 to 68985. [2021-07-13 18:23:02,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68985 states, 68983 states have (on average 2.6626850093501298) internal successors, (183680), 68984 states have internal predecessors, (183680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:02,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68985 states to 68985 states and 183680 transitions. [2021-07-13 18:23:02,552 INFO L78 Accepts]: Start accepts. Automaton has 68985 states and 183680 transitions. Word has length 373 [2021-07-13 18:23:02,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:02,553 INFO L482 AbstractCegarLoop]: Abstraction has 68985 states and 183680 transitions. [2021-07-13 18:23:02,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 21.11764705882353) internal successors, (359), 17 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:02,553 INFO L276 IsEmpty]: Start isEmpty. Operand 68985 states and 183680 transitions. [2021-07-13 18:23:02,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-07-13 18:23:02,721 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:02,722 INFO L508 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] [2021-07-13 18:23:02,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-13 18:23:02,922 INFO L430 AbstractCegarLoop]: === Iteration 46 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:02,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:02,923 INFO L82 PathProgramCache]: Analyzing trace with hash -645950560, now seen corresponding path program 14 times [2021-07-13 18:23:02,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:02,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983187395] [2021-07-13 18:23:02,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:02,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:03,071 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 824 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:23:03,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:03,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983187395] [2021-07-13 18:23:03,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983187395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:03,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373492299] [2021-07-13 18:23:03,071 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 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 [2021-07-13 18:23:03,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:23:03,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:03,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:23:03,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:03,662 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 800 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-07-13 18:23:03,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373492299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:03,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:03,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-07-13 18:23:03,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950071271] [2021-07-13 18:23:03,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:23:03,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:03,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:23:03,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:23:03,666 INFO L87 Difference]: Start difference. First operand 68985 states and 183680 transitions. Second operand has 17 states, 17 states have (on average 21.11764705882353) internal successors, (359), 17 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:04,013 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-07-13 18:23:04,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:04,506 INFO L93 Difference]: Finished difference Result 100010 states and 264114 transitions. [2021-07-13 18:23:04,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 18:23:04,506 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.11764705882353) internal successors, (359), 17 states have internal predecessors, (359), 0 states have call successors, (0), 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 [2021-07-13 18:23:04,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:04,768 INFO L225 Difference]: With dead ends: 100010 [2021-07-13 18:23:04,768 INFO L226 Difference]: Without dead ends: 100010 [2021-07-13 18:23:04,768 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 414.9ms TimeCoverageRelationStatistics Valid=284, Invalid=772, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 18:23:05,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100010 states. [2021-07-13 18:23:06,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100010 to 70805. [2021-07-13 18:23:06,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70805 states, 70803 states have (on average 2.6637430617346722) internal successors, (188601), 70804 states have internal predecessors, (188601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:06,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70805 states to 70805 states and 188601 transitions. [2021-07-13 18:23:06,924 INFO L78 Accepts]: Start accepts. Automaton has 70805 states and 188601 transitions. Word has length 373 [2021-07-13 18:23:06,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:06,924 INFO L482 AbstractCegarLoop]: Abstraction has 70805 states and 188601 transitions. [2021-07-13 18:23:06,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 21.11764705882353) internal successors, (359), 17 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:06,924 INFO L276 IsEmpty]: Start isEmpty. Operand 70805 states and 188601 transitions. [2021-07-13 18:23:07,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-07-13 18:23:07,053 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:07,053 INFO L508 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] [2021-07-13 18:23:07,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:23:07,254 INFO L430 AbstractCegarLoop]: === Iteration 47 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:07,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:07,254 INFO L82 PathProgramCache]: Analyzing trace with hash 2134981814, now seen corresponding path program 15 times [2021-07-13 18:23:07,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:07,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535477035] [2021-07-13 18:23:07,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:07,428 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 824 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:23:07,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:07,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535477035] [2021-07-13 18:23:07,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535477035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:07,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465716190] [2021-07-13 18:23:07,429 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 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 [2021-07-13 18:23:07,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 18:23:07,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:07,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:23:07,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:08,546 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 800 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-07-13 18:23:08,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465716190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:08,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:08,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-07-13 18:23:08,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225494342] [2021-07-13 18:23:08,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:23:08,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:08,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:23:08,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:23:08,548 INFO L87 Difference]: Start difference. First operand 70805 states and 188601 transitions. Second operand has 17 states, 17 states have (on average 21.11764705882353) internal successors, (359), 17 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:09,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:09,371 INFO L93 Difference]: Finished difference Result 97690 states and 258314 transitions. [2021-07-13 18:23:09,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 18:23:09,371 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.11764705882353) internal successors, (359), 17 states have internal predecessors, (359), 0 states have call successors, (0), 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 [2021-07-13 18:23:09,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:09,593 INFO L225 Difference]: With dead ends: 97690 [2021-07-13 18:23:09,593 INFO L226 Difference]: Without dead ends: 97690 [2021-07-13 18:23:09,594 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 213.5ms TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 18:23:09,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97690 states. [2021-07-13 18:23:11,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97690 to 73705. [2021-07-13 18:23:11,231 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) [2021-07-13 18:23:11,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73705 states to 73705 states and 196476 transitions. [2021-07-13 18:23:11,425 INFO L78 Accepts]: Start accepts. Automaton has 73705 states and 196476 transitions. Word has length 373 [2021-07-13 18:23:11,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:11,425 INFO L482 AbstractCegarLoop]: Abstraction has 73705 states and 196476 transitions. [2021-07-13 18:23:11,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 21.11764705882353) internal successors, (359), 17 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:11,425 INFO L276 IsEmpty]: Start isEmpty. Operand 73705 states and 196476 transitions. [2021-07-13 18:23:11,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-07-13 18:23:11,559 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:11,559 INFO L508 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] [2021-07-13 18:23:11,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:23:11,760 INFO L430 AbstractCegarLoop]: === Iteration 48 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:11,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:11,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1420999840, now seen corresponding path program 16 times [2021-07-13 18:23:11,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:11,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108405605] [2021-07-13 18:23:11,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:12,259 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 824 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:23:12,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:12,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108405605] [2021-07-13 18:23:12,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108405605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:12,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32327881] [2021-07-13 18:23:12,260 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 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 [2021-07-13 18:23:12,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:23:12,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:12,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:23:12,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 800 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-07-13 18:23:13,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32327881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:13,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:13,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-07-13 18:23:13,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889673395] [2021-07-13 18:23:13,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:23:13,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:13,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:23:13,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:23:13,069 INFO L87 Difference]: Start difference. First operand 73705 states and 196476 transitions. Second operand has 17 states, 17 states have (on average 21.11764705882353) internal successors, (359), 17 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:13,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:13,920 INFO L93 Difference]: Finished difference Result 98365 states and 260554 transitions. [2021-07-13 18:23:13,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:23:13,920 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.11764705882353) internal successors, (359), 17 states have internal predecessors, (359), 0 states have call successors, (0), 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 [2021-07-13 18:23:13,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:14,173 INFO L225 Difference]: With dead ends: 98365 [2021-07-13 18:23:14,174 INFO L226 Difference]: Without dead ends: 98365 [2021-07-13 18:23:14,174 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 579.7ms TimeCoverageRelationStatistics Valid=302, Invalid=888, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 18:23:14,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98365 states. [2021-07-13 18:23:15,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98365 to 74785. [2021-07-13 18:23:15,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74785 states, 74783 states have (on average 2.666782557533129) internal successors, (199430), 74784 states have internal predecessors, (199430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:16,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74785 states to 74785 states and 199430 transitions. [2021-07-13 18:23:16,407 INFO L78 Accepts]: Start accepts. Automaton has 74785 states and 199430 transitions. Word has length 373 [2021-07-13 18:23:16,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:16,407 INFO L482 AbstractCegarLoop]: Abstraction has 74785 states and 199430 transitions. [2021-07-13 18:23:16,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 21.11764705882353) internal successors, (359), 17 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:16,408 INFO L276 IsEmpty]: Start isEmpty. Operand 74785 states and 199430 transitions. [2021-07-13 18:23:16,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-07-13 18:23:16,808 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:16,808 INFO L508 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] [2021-07-13 18:23:17,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-13 18:23:17,033 INFO L430 AbstractCegarLoop]: === Iteration 49 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:17,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:17,033 INFO L82 PathProgramCache]: Analyzing trace with hash 749201330, now seen corresponding path program 17 times [2021-07-13 18:23:17,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:17,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212553723] [2021-07-13 18:23:17,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:17,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:17,249 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:23:17,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:17,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212553723] [2021-07-13 18:23:17,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212553723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:17,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198795799] [2021-07-13 18:23:17,250 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 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 [2021-07-13 18:23:17,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 18:23:17,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:17,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:23:17,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:18,020 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:23:18,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198795799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:18,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:18,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-13 18:23:18,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909138640] [2021-07-13 18:23:18,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:23:18,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:18,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:23:18,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:23:18,022 INFO L87 Difference]: Start difference. First operand 74785 states and 199430 transitions. Second operand has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:18,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:18,703 INFO L93 Difference]: Finished difference Result 97570 states and 257498 transitions. [2021-07-13 18:23:18,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 18:23:18,704 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 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 [2021-07-13 18:23:18,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:18,950 INFO L225 Difference]: With dead ends: 97570 [2021-07-13 18:23:18,950 INFO L226 Difference]: Without dead ends: 97570 [2021-07-13 18:23:18,950 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 202.1ms TimeCoverageRelationStatistics Valid=237, Invalid=693, Unknown=0, NotChecked=0, Total=930 [2021-07-13 18:23:19,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97570 states. [2021-07-13 18:23:20,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97570 to 72145. [2021-07-13 18:23:20,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72145 states, 72143 states have (on average 2.664402644747238) internal successors, (192218), 72144 states have internal predecessors, (192218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:21,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72145 states to 72145 states and 192218 transitions. [2021-07-13 18:23:21,216 INFO L78 Accepts]: Start accepts. Automaton has 72145 states and 192218 transitions. Word has length 373 [2021-07-13 18:23:21,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:21,216 INFO L482 AbstractCegarLoop]: Abstraction has 72145 states and 192218 transitions. [2021-07-13 18:23:21,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:21,216 INFO L276 IsEmpty]: Start isEmpty. Operand 72145 states and 192218 transitions. [2021-07-13 18:23:21,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-07-13 18:23:21,347 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:21,347 INFO L508 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] [2021-07-13 18:23:21,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-13 18:23:21,548 INFO L430 AbstractCegarLoop]: === Iteration 50 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:21,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:21,548 INFO L82 PathProgramCache]: Analyzing trace with hash -764833592, now seen corresponding path program 18 times [2021-07-13 18:23:21,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:21,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799949710] [2021-07-13 18:23:21,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:21,708 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:23:21,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:21,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799949710] [2021-07-13 18:23:21,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799949710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:21,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533883113] [2021-07-13 18:23:21,709 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 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 [2021-07-13 18:23:22,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 18:23:22,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:22,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:23:22,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:23:22,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533883113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:22,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:22,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-13 18:23:22,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245409996] [2021-07-13 18:23:22,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:23:22,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:22,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:23:22,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:23:22,466 INFO L87 Difference]: Start difference. First operand 72145 states and 192218 transitions. Second operand has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:23,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:23,491 INFO L93 Difference]: Finished difference Result 117055 states and 310115 transitions. [2021-07-13 18:23:23,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 18:23:23,492 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 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 [2021-07-13 18:23:23,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:24,036 INFO L225 Difference]: With dead ends: 117055 [2021-07-13 18:23:24,037 INFO L226 Difference]: Without dead ends: 117055 [2021-07-13 18:23:24,037 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 213.4ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-13 18:23:24,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117055 states. [2021-07-13 18:23:25,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117055 to 77945. [2021-07-13 18:23:25,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77945 states, 77943 states have (on average 2.668206253287659) internal successors, (207968), 77944 states have internal predecessors, (207968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:26,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77945 states to 77945 states and 207968 transitions. [2021-07-13 18:23:26,004 INFO L78 Accepts]: Start accepts. Automaton has 77945 states and 207968 transitions. Word has length 373 [2021-07-13 18:23:26,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:26,004 INFO L482 AbstractCegarLoop]: Abstraction has 77945 states and 207968 transitions. [2021-07-13 18:23:26,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:26,004 INFO L276 IsEmpty]: Start isEmpty. Operand 77945 states and 207968 transitions. [2021-07-13 18:23:26,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-07-13 18:23:26,143 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:26,144 INFO L508 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] [2021-07-13 18:23:26,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 18:23:26,346 INFO L430 AbstractCegarLoop]: === Iteration 51 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:26,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:26,346 INFO L82 PathProgramCache]: Analyzing trace with hash -25847950, now seen corresponding path program 19 times [2021-07-13 18:23:26,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:26,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715274715] [2021-07-13 18:23:26,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:26,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:26,906 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:23:26,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:26,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715274715] [2021-07-13 18:23:26,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715274715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:26,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882746397] [2021-07-13 18:23:26,906 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 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 [2021-07-13 18:23:27,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:27,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:23:27,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:27,452 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:23:27,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882746397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:27,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:27,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-13 18:23:27,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927504402] [2021-07-13 18:23:27,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:23:27,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:27,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:23:27,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:23:27,454 INFO L87 Difference]: Start difference. First operand 77945 states and 207968 transitions. Second operand has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:28,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:28,320 INFO L93 Difference]: Finished difference Result 112495 states and 298422 transitions. [2021-07-13 18:23:28,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 18:23:28,320 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 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 [2021-07-13 18:23:28,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:28,624 INFO L225 Difference]: With dead ends: 112495 [2021-07-13 18:23:28,624 INFO L226 Difference]: Without dead ends: 112495 [2021-07-13 18:23:28,624 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 218.8ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-07-13 18:23:28,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112495 states. [2021-07-13 18:23:30,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112495 to 76865. [2021-07-13 18:23:30,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76865 states, 76863 states have (on average 2.667265134069708) internal successors, (205014), 76864 states have internal predecessors, (205014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:31,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76865 states to 76865 states and 205014 transitions. [2021-07-13 18:23:31,015 INFO L78 Accepts]: Start accepts. Automaton has 76865 states and 205014 transitions. Word has length 373 [2021-07-13 18:23:31,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:31,015 INFO L482 AbstractCegarLoop]: Abstraction has 76865 states and 205014 transitions. [2021-07-13 18:23:31,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:31,016 INFO L276 IsEmpty]: Start isEmpty. Operand 76865 states and 205014 transitions. [2021-07-13 18:23:31,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-07-13 18:23:31,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:31,159 INFO L508 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] [2021-07-13 18:23:31,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:23:31,361 INFO L430 AbstractCegarLoop]: === Iteration 52 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:31,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:31,361 INFO L82 PathProgramCache]: Analyzing trace with hash -399098378, now seen corresponding path program 20 times [2021-07-13 18:23:31,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:31,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461894842] [2021-07-13 18:23:31,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:31,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:31,491 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:23:31,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:31,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461894842] [2021-07-13 18:23:31,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461894842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:31,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244022028] [2021-07-13 18:23:31,492 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 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 [2021-07-13 18:23:31,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:23:31,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:31,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:23:31,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:32,429 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:23:32,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244022028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:32,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:32,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-13 18:23:32,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346549665] [2021-07-13 18:23:32,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:23:32,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:32,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:23:32,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:23:32,431 INFO L87 Difference]: Start difference. First operand 76865 states and 205014 transitions. Second operand has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:33,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:33,198 INFO L93 Difference]: Finished difference Result 101390 states and 267801 transitions. [2021-07-13 18:23:33,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 18:23:33,199 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 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 [2021-07-13 18:23:33,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:33,434 INFO L225 Difference]: With dead ends: 101390 [2021-07-13 18:23:33,434 INFO L226 Difference]: Without dead ends: 101390 [2021-07-13 18:23:33,434 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 185.8ms TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2021-07-13 18:23:33,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101390 states. [2021-07-13 18:23:34,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101390 to 80025. [2021-07-13 18:23:35,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80025 states, 80023 states have (on average 2.6686327680791773) internal successors, (213552), 80024 states have internal predecessors, (213552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:35,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80025 states to 80025 states and 213552 transitions. [2021-07-13 18:23:35,202 INFO L78 Accepts]: Start accepts. Automaton has 80025 states and 213552 transitions. Word has length 373 [2021-07-13 18:23:35,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:35,202 INFO L482 AbstractCegarLoop]: Abstraction has 80025 states and 213552 transitions. [2021-07-13 18:23:35,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:35,203 INFO L276 IsEmpty]: Start isEmpty. Operand 80025 states and 213552 transitions. [2021-07-13 18:23:35,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-07-13 18:23:35,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:35,705 INFO L508 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] [2021-07-13 18:23:35,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:23:35,911 INFO L430 AbstractCegarLoop]: === Iteration 53 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:35,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:35,911 INFO L82 PathProgramCache]: Analyzing trace with hash 339887264, now seen corresponding path program 21 times [2021-07-13 18:23:35,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:35,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986068140] [2021-07-13 18:23:35,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:35,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:36,069 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:23:36,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:36,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986068140] [2021-07-13 18:23:36,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986068140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:36,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247942925] [2021-07-13 18:23:36,070 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 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 [2021-07-13 18:23:36,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 18:23:36,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:36,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:23:36,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:36,787 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:23:36,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247942925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:36,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:36,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-13 18:23:36,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916590985] [2021-07-13 18:23:36,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:23:36,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:36,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:23:36,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:23:36,789 INFO L87 Difference]: Start difference. First operand 80025 states and 213552 transitions. Second operand has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:37,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:37,736 INFO L93 Difference]: Finished difference Result 133890 states and 356075 transitions. [2021-07-13 18:23:37,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 18:23:37,737 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 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 [2021-07-13 18:23:37,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:38,287 INFO L225 Difference]: With dead ends: 133890 [2021-07-13 18:23:38,287 INFO L226 Difference]: Without dead ends: 133890 [2021-07-13 18:23:38,287 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 195.9ms TimeCoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2021-07-13 18:23:38,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133890 states. [2021-07-13 18:23:39,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133890 to 82925. [2021-07-13 18:23:40,038 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) [2021-07-13 18:23:40,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82925 states to 82925 states and 221427 transitions. [2021-07-13 18:23:40,586 INFO L78 Accepts]: Start accepts. Automaton has 82925 states and 221427 transitions. Word has length 373 [2021-07-13 18:23:40,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:40,587 INFO L482 AbstractCegarLoop]: Abstraction has 82925 states and 221427 transitions. [2021-07-13 18:23:40,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:40,587 INFO L276 IsEmpty]: Start isEmpty. Operand 82925 states and 221427 transitions. [2021-07-13 18:23:40,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-07-13 18:23:40,777 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:40,777 INFO L508 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] [2021-07-13 18:23:40,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-13 18:23:40,977 INFO L430 AbstractCegarLoop]: === Iteration 54 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:40,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:40,978 INFO L82 PathProgramCache]: Analyzing trace with hash -697642707, now seen corresponding path program 20 times [2021-07-13 18:23:40,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:40,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467697324] [2021-07-13 18:23:40,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:40,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1088 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-07-13 18:23:41,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:41,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467697324] [2021-07-13 18:23:41,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467697324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:41,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170408155] [2021-07-13 18:23:41,157 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 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 [2021-07-13 18:23:41,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:23:41,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:41,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:23:41,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:41,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:23:41,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170408155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:41,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:41,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-13 18:23:41,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438278373] [2021-07-13 18:23:41,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:23:41,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:41,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:23:41,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:23:41,695 INFO L87 Difference]: Start difference. First operand 82925 states and 221427 transitions. Second operand has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:42,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:42,596 INFO L93 Difference]: Finished difference Result 95145 states and 252251 transitions. [2021-07-13 18:23:42,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 18:23:42,596 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 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 [2021-07-13 18:23:42,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:42,783 INFO L225 Difference]: With dead ends: 95145 [2021-07-13 18:23:42,783 INFO L226 Difference]: Without dead ends: 95145 [2021-07-13 18:23:42,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 535.5ms TimeCoverageRelationStatistics Valid=425, Invalid=981, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 18:23:43,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95145 states. [2021-07-13 18:23:44,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95145 to 85085. [2021-07-13 18:23:44,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85085 states, 85083 states have (on average 2.6719203601189427) internal successors, (227335), 85084 states have internal predecessors, (227335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:44,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85085 states to 85085 states and 227335 transitions. [2021-07-13 18:23:44,751 INFO L78 Accepts]: Start accepts. Automaton has 85085 states and 227335 transitions. Word has length 374 [2021-07-13 18:23:44,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:44,751 INFO L482 AbstractCegarLoop]: Abstraction has 85085 states and 227335 transitions. [2021-07-13 18:23:44,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:44,752 INFO L276 IsEmpty]: Start isEmpty. Operand 85085 states and 227335 transitions. [2021-07-13 18:23:44,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-07-13 18:23:44,885 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:44,885 INFO L508 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] [2021-07-13 18:23:45,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:23:45,086 INFO L430 AbstractCegarLoop]: === Iteration 55 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:45,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:45,086 INFO L82 PathProgramCache]: Analyzing trace with hash -803067581, now seen corresponding path program 21 times [2021-07-13 18:23:45,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:45,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853069455] [2021-07-13 18:23:45,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:45,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:23:45,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:45,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853069455] [2021-07-13 18:23:45,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853069455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:45,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337235132] [2021-07-13 18:23:45,646 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 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 [2021-07-13 18:23:46,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 18:23:46,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:46,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:23:46,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:46,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:23:46,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337235132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:46,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:46,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-13 18:23:46,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319776708] [2021-07-13 18:23:46,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:23:46,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:46,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:23:46,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:23:46,425 INFO L87 Difference]: Start difference. First operand 85085 states and 227335 transitions. Second operand has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:47,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:47,214 INFO L93 Difference]: Finished difference Result 101015 states and 267051 transitions. [2021-07-13 18:23:47,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 18:23:47,214 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 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 [2021-07-13 18:23:47,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:47,437 INFO L225 Difference]: With dead ends: 101015 [2021-07-13 18:23:47,437 INFO L226 Difference]: Without dead ends: 101015 [2021-07-13 18:23:47,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 799.2ms TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 18:23:47,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101015 states. [2021-07-13 18:23:48,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101015 to 84005. [2021-07-13 18:23:49,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84005 states, 84003 states have (on average 2.6711069842743713) internal successors, (224381), 84004 states have internal predecessors, (224381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:49,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84005 states to 84005 states and 224381 transitions. [2021-07-13 18:23:49,607 INFO L78 Accepts]: Start accepts. Automaton has 84005 states and 224381 transitions. Word has length 374 [2021-07-13 18:23:49,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:49,608 INFO L482 AbstractCegarLoop]: Abstraction has 84005 states and 224381 transitions. [2021-07-13 18:23:49,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:49,608 INFO L276 IsEmpty]: Start isEmpty. Operand 84005 states and 224381 transitions. [2021-07-13 18:23:49,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-07-13 18:23:49,751 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:49,751 INFO L508 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] [2021-07-13 18:23:49,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-13 18:23:49,953 INFO L430 AbstractCegarLoop]: === Iteration 56 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:49,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:49,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1884102419, now seen corresponding path program 22 times [2021-07-13 18:23:49,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:49,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401073313] [2021-07-13 18:23:49,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:49,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:50,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:23:50,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:50,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401073313] [2021-07-13 18:23:50,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401073313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:50,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8632663] [2021-07-13 18:23:50,130 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 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 [2021-07-13 18:23:50,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:23:50,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:50,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:23:50,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:23:51,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8632663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:51,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:51,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-13 18:23:51,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626728965] [2021-07-13 18:23:51,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:23:51,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:51,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:23:51,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:23:51,283 INFO L87 Difference]: Start difference. First operand 84005 states and 224381 transitions. Second operand has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:52,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:52,144 INFO L93 Difference]: Finished difference Result 104505 states and 276858 transitions. [2021-07-13 18:23:52,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:23:52,145 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 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 [2021-07-13 18:23:52,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:52,389 INFO L225 Difference]: With dead ends: 104505 [2021-07-13 18:23:52,389 INFO L226 Difference]: Without dead ends: 104505 [2021-07-13 18:23:52,390 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 254.5ms TimeCoverageRelationStatistics Valid=372, Invalid=960, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 18:23:52,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104505 states. [2021-07-13 18:23:53,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104505 to 85825. [2021-07-13 18:23:53,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85825 states, 85823 states have (on average 2.6718012653950574) internal successors, (229302), 85824 states have internal predecessors, (229302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:54,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85825 states to 85825 states and 229302 transitions. [2021-07-13 18:23:54,200 INFO L78 Accepts]: Start accepts. Automaton has 85825 states and 229302 transitions. Word has length 374 [2021-07-13 18:23:54,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:54,201 INFO L482 AbstractCegarLoop]: Abstraction has 85825 states and 229302 transitions. [2021-07-13 18:23:54,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:54,201 INFO L276 IsEmpty]: Start isEmpty. Operand 85825 states and 229302 transitions. [2021-07-13 18:23:54,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-07-13 18:23:54,702 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:54,702 INFO L508 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] [2021-07-13 18:23:54,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-13 18:23:54,905 INFO L430 AbstractCegarLoop]: === Iteration 57 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:54,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:54,905 INFO L82 PathProgramCache]: Analyzing trace with hash -137678461, now seen corresponding path program 23 times [2021-07-13 18:23:54,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:54,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921132065] [2021-07-13 18:23:54,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:54,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:55,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:23:55,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:55,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921132065] [2021-07-13 18:23:55,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921132065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:55,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701587893] [2021-07-13 18:23:55,065 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 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 [2021-07-13 18:23:55,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 18:23:55,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:55,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:23:55,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:55,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:23:55,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701587893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:55,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:55,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-13 18:23:55,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217488322] [2021-07-13 18:23:55,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:23:55,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:55,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:23:55,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:23:55,679 INFO L87 Difference]: Start difference. First operand 85825 states and 229302 transitions. Second operand has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:56,038 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-07-13 18:23:56,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:56,555 INFO L93 Difference]: Finished difference Result 108940 states and 288332 transitions. [2021-07-13 18:23:56,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 18:23:56,556 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 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 [2021-07-13 18:23:56,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:56,800 INFO L225 Difference]: With dead ends: 108940 [2021-07-13 18:23:56,800 INFO L226 Difference]: Without dead ends: 108940 [2021-07-13 18:23:56,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 462.0ms TimeCoverageRelationStatistics Valid=382, Invalid=1024, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 18:23:57,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108940 states. [2021-07-13 18:23:59,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108940 to 88725. [2021-07-13 18:23:59,156 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) [2021-07-13 18:23:59,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88725 states to 88725 states and 237177 transitions. [2021-07-13 18:23:59,400 INFO L78 Accepts]: Start accepts. Automaton has 88725 states and 237177 transitions. Word has length 374 [2021-07-13 18:23:59,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:59,400 INFO L482 AbstractCegarLoop]: Abstraction has 88725 states and 237177 transitions. [2021-07-13 18:23:59,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:59,400 INFO L276 IsEmpty]: Start isEmpty. Operand 88725 states and 237177 transitions. [2021-07-13 18:23:59,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-07-13 18:23:59,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:59,552 INFO L508 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] [2021-07-13 18:23:59,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-13 18:23:59,752 INFO L430 AbstractCegarLoop]: === Iteration 58 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:59,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:59,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1812971693, now seen corresponding path program 24 times [2021-07-13 18:23:59,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:59,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551143579] [2021-07-13 18:23:59,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:59,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:59,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:23:59,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:59,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551143579] [2021-07-13 18:23:59,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551143579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:59,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649609431] [2021-07-13 18:23:59,930 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 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 [2021-07-13 18:24:00,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 18:24:00,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:24:00,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:24:00,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:24:01,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649609431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:01,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:01,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-13 18:24:01,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265416405] [2021-07-13 18:24:01,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:24:01,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:01,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:24:01,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:24:01,065 INFO L87 Difference]: Start difference. First operand 88725 states and 237177 transitions. Second operand has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:01,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:01,952 INFO L93 Difference]: Finished difference Result 111605 states and 295408 transitions. [2021-07-13 18:24:01,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 18:24:01,952 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 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 [2021-07-13 18:24:01,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:02,214 INFO L225 Difference]: With dead ends: 111605 [2021-07-13 18:24:02,214 INFO L226 Difference]: Without dead ends: 111605 [2021-07-13 18:24:02,214 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 256.7ms TimeCoverageRelationStatistics Valid=392, Invalid=1090, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 18:24:02,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111605 states. [2021-07-13 18:24:04,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111605 to 91625. [2021-07-13 18:24:04,250 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) [2021-07-13 18:24:04,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91625 states to 91625 states and 245052 transitions. [2021-07-13 18:24:04,511 INFO L78 Accepts]: Start accepts. Automaton has 91625 states and 245052 transitions. Word has length 374 [2021-07-13 18:24:04,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:04,512 INFO L482 AbstractCegarLoop]: Abstraction has 91625 states and 245052 transitions. [2021-07-13 18:24:04,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:04,512 INFO L276 IsEmpty]: Start isEmpty. Operand 91625 states and 245052 transitions. [2021-07-13 18:24:04,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-07-13 18:24:04,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:04,673 INFO L508 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] [2021-07-13 18:24:04,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-13 18:24:04,873 INFO L430 AbstractCegarLoop]: === Iteration 59 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:04,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:04,874 INFO L82 PathProgramCache]: Analyzing trace with hash 298936771, now seen corresponding path program 25 times [2021-07-13 18:24:04,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:04,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692158771] [2021-07-13 18:24:04,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:04,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:05,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:24:05,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:05,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692158771] [2021-07-13 18:24:05,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692158771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:05,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208039910] [2021-07-13 18:24:05,026 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 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 [2021-07-13 18:24:05,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:05,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:24:05,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:05,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:24:05,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208039910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:05,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:05,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-13 18:24:05,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864429056] [2021-07-13 18:24:05,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:24:05,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:05,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:24:05,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:24:05,937 INFO L87 Difference]: Start difference. First operand 91625 states and 245052 transitions. Second operand has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:06,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:06,799 INFO L93 Difference]: Finished difference Result 108940 states and 288408 transitions. [2021-07-13 18:24:06,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 18:24:06,799 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 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 [2021-07-13 18:24:06,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:07,055 INFO L225 Difference]: With dead ends: 108940 [2021-07-13 18:24:07,055 INFO L226 Difference]: Without dead ends: 108940 [2021-07-13 18:24:07,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 264.3ms TimeCoverageRelationStatistics Valid=402, Invalid=1158, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 18:24:07,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108940 states. [2021-07-13 18:24:08,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108940 to 91625. [2021-07-13 18:24:09,079 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) [2021-07-13 18:24:09,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91625 states to 91625 states and 245052 transitions. [2021-07-13 18:24:09,381 INFO L78 Accepts]: Start accepts. Automaton has 91625 states and 245052 transitions. Word has length 374 [2021-07-13 18:24:09,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:09,381 INFO L482 AbstractCegarLoop]: Abstraction has 91625 states and 245052 transitions. [2021-07-13 18:24:09,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:09,381 INFO L276 IsEmpty]: Start isEmpty. Operand 91625 states and 245052 transitions. [2021-07-13 18:24:09,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-07-13 18:24:09,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:09,534 INFO L508 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] [2021-07-13 18:24:09,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:24:09,735 INFO L430 AbstractCegarLoop]: === Iteration 60 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:09,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:09,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1037922413, now seen corresponding path program 26 times [2021-07-13 18:24:09,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:09,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875783148] [2021-07-13 18:24:09,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:09,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:09,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:24:09,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:09,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875783148] [2021-07-13 18:24:09,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875783148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:09,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253845848] [2021-07-13 18:24:09,899 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 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 [2021-07-13 18:24:10,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:24:10,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:24:10,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:24:10,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:10,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:24:10,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253845848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:10,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:10,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-13 18:24:10,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668730221] [2021-07-13 18:24:10,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:24:10,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:10,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:24:10,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:24:10,801 INFO L87 Difference]: Start difference. First operand 91625 states and 245052 transitions. Second operand has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:11,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:11,674 INFO L93 Difference]: Finished difference Result 108395 states and 287329 transitions. [2021-07-13 18:24:11,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:24:11,674 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 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 [2021-07-13 18:24:11,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:11,929 INFO L225 Difference]: With dead ends: 108395 [2021-07-13 18:24:11,929 INFO L226 Difference]: Without dead ends: 108395 [2021-07-13 18:24:11,929 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 285.3ms TimeCoverageRelationStatistics Valid=412, Invalid=1228, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 18:24:12,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108395 states. [2021-07-13 18:24:13,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108395 to 89465. [2021-07-13 18:24:13,663 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) [2021-07-13 18:24:14,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89465 states to 89465 states and 239144 transitions. [2021-07-13 18:24:14,236 INFO L78 Accepts]: Start accepts. Automaton has 89465 states and 239144 transitions. Word has length 374 [2021-07-13 18:24:14,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:14,237 INFO L482 AbstractCegarLoop]: Abstraction has 89465 states and 239144 transitions. [2021-07-13 18:24:14,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:14,237 INFO L276 IsEmpty]: Start isEmpty. Operand 89465 states and 239144 transitions. [2021-07-13 18:24:14,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2021-07-13 18:24:14,399 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:14,399 INFO L508 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] [2021-07-13 18:24:14,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-13 18:24:14,600 INFO L430 AbstractCegarLoop]: === Iteration 61 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:14,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:14,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1993518588, now seen corresponding path program 10 times [2021-07-13 18:24:14,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:14,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238333719] [2021-07-13 18:24:14,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:14,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:14,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:24:14,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:14,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238333719] [2021-07-13 18:24:14,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238333719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:14,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950994639] [2021-07-13 18:24:14,837 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 [2021-07-13 18:24:15,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:24:15,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:24:15,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:24:15,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:16,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:24:16,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950994639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:16,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:16,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-07-13 18:24:16,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323122715] [2021-07-13 18:24:16,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 18:24:16,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:16,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 18:24:16,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-07-13 18:24:16,010 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) [2021-07-13 18:24:16,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:16,927 INFO L93 Difference]: Finished difference Result 101502 states and 269889 transitions. [2021-07-13 18:24:16,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 18:24:16,928 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 [2021-07-13 18:24:16,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:17,171 INFO L225 Difference]: With dead ends: 101502 [2021-07-13 18:24:17,171 INFO L226 Difference]: Without dead ends: 101502 [2021-07-13 18:24:17,171 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 403 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 705.0ms TimeCoverageRelationStatistics Valid=631, Invalid=1349, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 18:24:17,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101502 states. [2021-07-13 18:24:19,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101502 to 93860. [2021-07-13 18:24:19,263 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) [2021-07-13 18:24:19,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93860 states to 93860 states and 250806 transitions. [2021-07-13 18:24:19,547 INFO L78 Accepts]: Start accepts. Automaton has 93860 states and 250806 transitions. Word has length 404 [2021-07-13 18:24:19,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:19,548 INFO L482 AbstractCegarLoop]: Abstraction has 93860 states and 250806 transitions. [2021-07-13 18:24:19,548 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) [2021-07-13 18:24:19,548 INFO L276 IsEmpty]: Start isEmpty. Operand 93860 states and 250806 transitions. [2021-07-13 18:24:19,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-07-13 18:24:19,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:19,718 INFO L508 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] [2021-07-13 18:24:19,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:24:19,919 INFO L430 AbstractCegarLoop]: === Iteration 62 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:19,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:19,920 INFO L82 PathProgramCache]: Analyzing trace with hash 482223965, now seen corresponding path program 22 times [2021-07-13 18:24:19,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:19,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436438642] [2021-07-13 18:24:19,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:20,059 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 854 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-07-13 18:24:20,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:20,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436438642] [2021-07-13 18:24:20,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436438642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:20,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489584748] [2021-07-13 18:24:20,059 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 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 [2021-07-13 18:24:20,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:24:20,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:24:20,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:24:20,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:21,174 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 830 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-07-13 18:24:21,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489584748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:21,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:21,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-07-13 18:24:21,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516011576] [2021-07-13 18:24:21,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:24:21,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:21,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:24:21,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:24:21,176 INFO L87 Difference]: Start difference. First operand 93860 states and 250806 transitions. Second operand has 16 states, 16 states have (on average 22.375) internal successors, (358), 16 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:21,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:21,980 INFO L93 Difference]: Finished difference Result 113030 states and 298121 transitions. [2021-07-13 18:24:21,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 18:24:21,980 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.375) internal successors, (358), 16 states have internal predecessors, (358), 0 states have call successors, (0), 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 [2021-07-13 18:24:21,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:22,257 INFO L225 Difference]: With dead ends: 113030 [2021-07-13 18:24:22,258 INFO L226 Difference]: Without dead ends: 113030 [2021-07-13 18:24:22,258 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 179.0ms TimeCoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2021-07-13 18:24:22,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113030 states. [2021-07-13 18:24:24,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113030 to 85980. [2021-07-13 18:24:24,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85980 states, 85978 states have (on average 2.66896182744423) internal successors, (229472), 85979 states have internal predecessors, (229472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:24,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85980 states to 85980 states and 229472 transitions. [2021-07-13 18:24:24,587 INFO L78 Accepts]: Start accepts. Automaton has 85980 states and 229472 transitions. Word has length 407 [2021-07-13 18:24:24,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:24,588 INFO L482 AbstractCegarLoop]: Abstraction has 85980 states and 229472 transitions. [2021-07-13 18:24:24,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 22.375) internal successors, (358), 16 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:24,588 INFO L276 IsEmpty]: Start isEmpty. Operand 85980 states and 229472 transitions. [2021-07-13 18:24:24,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-07-13 18:24:24,747 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:24,747 INFO L508 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] [2021-07-13 18:24:24,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-07-13 18:24:24,948 INFO L430 AbstractCegarLoop]: === Iteration 63 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:24,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:24,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1221209607, now seen corresponding path program 23 times [2021-07-13 18:24:24,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:24,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328452743] [2021-07-13 18:24:24,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:24,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:25,111 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 854 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-07-13 18:24:25,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:25,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328452743] [2021-07-13 18:24:25,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328452743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:25,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696264784] [2021-07-13 18:24:25,112 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 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 [2021-07-13 18:24:25,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 18:24:25,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:24:25,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:24:25,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:26,143 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 830 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-07-13 18:24:26,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696264784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:26,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:26,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-07-13 18:24:26,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093474995] [2021-07-13 18:24:26,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:24:26,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:26,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:24:26,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:24:26,144 INFO L87 Difference]: Start difference. First operand 85980 states and 229472 transitions. Second operand has 16 states, 16 states have (on average 22.375) internal successors, (358), 16 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:26,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:26,984 INFO L93 Difference]: Finished difference Result 121660 states and 322114 transitions. [2021-07-13 18:24:26,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 18:24:26,985 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.375) internal successors, (358), 16 states have internal predecessors, (358), 0 states have call successors, (0), 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 [2021-07-13 18:24:26,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:27,302 INFO L225 Difference]: With dead ends: 121660 [2021-07-13 18:24:27,302 INFO L226 Difference]: Without dead ends: 121660 [2021-07-13 18:24:27,302 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 188.8ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-07-13 18:24:27,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121660 states. [2021-07-13 18:24:29,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121660 to 88140. [2021-07-13 18:24:29,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88140 states, 88138 states have (on average 2.6705847648006533) internal successors, (235380), 88139 states have internal predecessors, (235380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:29,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88140 states to 88140 states and 235380 transitions. [2021-07-13 18:24:29,683 INFO L78 Accepts]: Start accepts. Automaton has 88140 states and 235380 transitions. Word has length 407 [2021-07-13 18:24:29,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:29,684 INFO L482 AbstractCegarLoop]: Abstraction has 88140 states and 235380 transitions. [2021-07-13 18:24:29,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 22.375) internal successors, (358), 16 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:29,684 INFO L276 IsEmpty]: Start isEmpty. Operand 88140 states and 235380 transitions. [2021-07-13 18:24:29,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-07-13 18:24:29,842 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:29,842 INFO L508 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] [2021-07-13 18:24:30,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:24:30,043 INFO L430 AbstractCegarLoop]: === Iteration 64 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:30,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:30,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1852504167, now seen corresponding path program 24 times [2021-07-13 18:24:30,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:30,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992179195] [2021-07-13 18:24:30,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:30,631 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 854 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-07-13 18:24:30,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:30,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992179195] [2021-07-13 18:24:30,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992179195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:30,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848581371] [2021-07-13 18:24:30,632 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 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 [2021-07-13 18:24:30,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 18:24:30,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:24:30,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:24:30,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:31,395 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 830 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-07-13 18:24:31,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848581371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:31,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:31,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-07-13 18:24:31,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929705469] [2021-07-13 18:24:31,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:24:31,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:31,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:24:31,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:24:31,397 INFO L87 Difference]: Start difference. First operand 88140 states and 235380 transitions. Second operand has 16 states, 16 states have (on average 22.375) internal successors, (358), 16 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:32,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:32,273 INFO L93 Difference]: Finished difference Result 123185 states and 326462 transitions. [2021-07-13 18:24:32,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 18:24:32,274 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.375) internal successors, (358), 16 states have internal predecessors, (358), 0 states have call successors, (0), 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 [2021-07-13 18:24:32,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:32,568 INFO L225 Difference]: With dead ends: 123185 [2021-07-13 18:24:32,568 INFO L226 Difference]: Without dead ends: 123185 [2021-07-13 18:24:32,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 217.6ms TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2021-07-13 18:24:32,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123185 states. [2021-07-13 18:24:34,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123185 to 91040. [2021-07-13 18:24:34,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91040 states, 91038 states have (on average 2.6720160811968627) internal successors, (243255), 91039 states have internal predecessors, (243255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:34,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91040 states to 91040 states and 243255 transitions. [2021-07-13 18:24:34,942 INFO L78 Accepts]: Start accepts. Automaton has 91040 states and 243255 transitions. Word has length 407 [2021-07-13 18:24:34,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:34,943 INFO L482 AbstractCegarLoop]: Abstraction has 91040 states and 243255 transitions. [2021-07-13 18:24:34,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 22.375) internal successors, (358), 16 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:34,943 INFO L276 IsEmpty]: Start isEmpty. Operand 91040 states and 243255 transitions. [2021-07-13 18:24:35,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-07-13 18:24:35,556 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:35,556 INFO L508 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] [2021-07-13 18:24:35,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-13 18:24:35,759 INFO L430 AbstractCegarLoop]: === Iteration 65 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:35,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:35,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1961219883, now seen corresponding path program 25 times [2021-07-13 18:24:35,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:35,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949987293] [2021-07-13 18:24:35,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 831 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:24:35,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:35,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949987293] [2021-07-13 18:24:35,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949987293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:35,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545013515] [2021-07-13 18:24:35,889 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 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 [2021-07-13 18:24:36,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:36,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:24:36,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:36,475 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 831 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:24:36,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545013515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:36,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:36,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-07-13 18:24:36,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40439942] [2021-07-13 18:24:36,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:24:36,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:36,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:24:36,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:24:36,477 INFO L87 Difference]: Start difference. First operand 91040 states and 243255 transitions. Second operand has 16 states, 16 states have (on average 22.4375) internal successors, (359), 16 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:37,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:37,599 INFO L93 Difference]: Finished difference Result 138530 states and 366581 transitions. [2021-07-13 18:24:37,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 18:24:37,600 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.4375) internal successors, (359), 16 states have internal predecessors, (359), 0 states have call successors, (0), 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 [2021-07-13 18:24:37,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:37,948 INFO L225 Difference]: With dead ends: 138530 [2021-07-13 18:24:38,182 INFO L226 Difference]: Without dead ends: 138530 [2021-07-13 18:24:38,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 168.9ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-07-13 18:24:38,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138530 states. [2021-07-13 18:24:40,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138530 to 102420. [2021-07-13 18:24:40,625 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) [2021-07-13 18:24:40,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102420 states to 102420 states and 274114 transitions. [2021-07-13 18:24:40,899 INFO L78 Accepts]: Start accepts. Automaton has 102420 states and 274114 transitions. Word has length 407 [2021-07-13 18:24:41,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:41,297 INFO L482 AbstractCegarLoop]: Abstraction has 102420 states and 274114 transitions. [2021-07-13 18:24:41,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 22.4375) internal successors, (359), 16 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:41,297 INFO L276 IsEmpty]: Start isEmpty. Operand 102420 states and 274114 transitions. [2021-07-13 18:24:41,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-13 18:24:41,565 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:41,566 INFO L508 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] [2021-07-13 18:24:41,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:24:41,766 INFO L430 AbstractCegarLoop]: === Iteration 66 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:41,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:41,767 INFO L82 PathProgramCache]: Analyzing trace with hash -332913562, now seen corresponding path program 26 times [2021-07-13 18:24:41,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:41,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469479109] [2021-07-13 18:24:41,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:41,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:41,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1084 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:24:41,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:41,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469479109] [2021-07-13 18:24:41,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469479109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:41,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253536256] [2021-07-13 18:24:41,954 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 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 [2021-07-13 18:24:42,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:24:42,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:24:42,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:24:42,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:42,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1060 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-07-13 18:24:42,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253536256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:42,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:42,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-07-13 18:24:42,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801960401] [2021-07-13 18:24:42,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:24:42,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:42,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:24:42,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:24:42,534 INFO L87 Difference]: Start difference. First operand 102420 states and 274114 transitions. Second operand has 19 states, 19 states have (on average 20.736842105263158) internal successors, (394), 19 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:43,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:43,561 INFO L93 Difference]: Finished difference Result 123860 states and 327931 transitions. [2021-07-13 18:24:43,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 18:24:43,561 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.736842105263158) internal successors, (394), 19 states have internal predecessors, (394), 0 states have call successors, (0), 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 [2021-07-13 18:24:43,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:44,064 INFO L225 Difference]: With dead ends: 123860 [2021-07-13 18:24:44,065 INFO L226 Difference]: Without dead ends: 123860 [2021-07-13 18:24:44,065 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 238.4ms TimeCoverageRelationStatistics Valid=365, Invalid=967, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 18:24:44,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123860 states. [2021-07-13 18:24:46,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123860 to 97360. [2021-07-13 18:24:46,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97360 states, 97358 states have (on average 2.6739559152817436) internal successors, (260331), 97359 states have internal predecessors, (260331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:46,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97360 states to 97360 states and 260331 transitions. [2021-07-13 18:24:46,510 INFO L78 Accepts]: Start accepts. Automaton has 97360 states and 260331 transitions. Word has length 408 [2021-07-13 18:24:46,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:46,510 INFO L482 AbstractCegarLoop]: Abstraction has 97360 states and 260331 transitions. [2021-07-13 18:24:46,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.736842105263158) internal successors, (394), 19 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:46,510 INFO L276 IsEmpty]: Start isEmpty. Operand 97360 states and 260331 transitions. [2021-07-13 18:24:46,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-13 18:24:46,676 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:46,676 INFO L508 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] [2021-07-13 18:24:46,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-13 18:24:46,877 INFO L430 AbstractCegarLoop]: === Iteration 67 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:46,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:46,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1413510396, now seen corresponding path program 27 times [2021-07-13 18:24:46,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:46,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006784330] [2021-07-13 18:24:46,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:47,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1084 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:24:47,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:47,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006784330] [2021-07-13 18:24:47,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006784330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:47,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751819737] [2021-07-13 18:24:47,036 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 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 [2021-07-13 18:24:47,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 18:24:47,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:24:47,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:24:47,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:48,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1060 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-07-13 18:24:48,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751819737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:48,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:48,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-07-13 18:24:48,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545137375] [2021-07-13 18:24:48,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:24:48,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:48,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:24:48,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:24:48,265 INFO L87 Difference]: Start difference. First operand 97360 states and 260331 transitions. Second operand has 19 states, 19 states have (on average 20.736842105263158) internal successors, (394), 19 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:49,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:49,225 INFO L93 Difference]: Finished difference Result 134650 states and 356772 transitions. [2021-07-13 18:24:49,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 18:24:49,226 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.736842105263158) internal successors, (394), 19 states have internal predecessors, (394), 0 states have call successors, (0), 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 [2021-07-13 18:24:49,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:49,562 INFO L225 Difference]: With dead ends: 134650 [2021-07-13 18:24:49,562 INFO L226 Difference]: Without dead ends: 134650 [2021-07-13 18:24:49,562 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 244.4ms TimeCoverageRelationStatistics Valid=363, Invalid=969, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 18:24:49,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134650 states. [2021-07-13 18:24:51,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134650 to 99180. [2021-07-13 18:24:51,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99180 states, 99178 states have (on average 2.6745044263848836) internal successors, (265252), 99179 states have internal predecessors, (265252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:52,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99180 states to 99180 states and 265252 transitions. [2021-07-13 18:24:52,280 INFO L78 Accepts]: Start accepts. Automaton has 99180 states and 265252 transitions. Word has length 408 [2021-07-13 18:24:52,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:52,280 INFO L482 AbstractCegarLoop]: Abstraction has 99180 states and 265252 transitions. [2021-07-13 18:24:52,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.736842105263158) internal successors, (394), 19 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:52,280 INFO L276 IsEmpty]: Start isEmpty. Operand 99180 states and 265252 transitions. [2021-07-13 18:24:52,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-13 18:24:52,879 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:52,879 INFO L508 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] [2021-07-13 18:24:53,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:24:53,080 INFO L430 AbstractCegarLoop]: === Iteration 68 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:53,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:53,080 INFO L82 PathProgramCache]: Analyzing trace with hash -930806746, now seen corresponding path program 28 times [2021-07-13 18:24:53,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:53,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449693252] [2021-07-13 18:24:53,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:53,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:53,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1084 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:24:53,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:53,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449693252] [2021-07-13 18:24:53,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449693252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:53,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052705414] [2021-07-13 18:24:53,276 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 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 [2021-07-13 18:24:53,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:24:53,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:24:53,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:24:53,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:54,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1060 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-07-13 18:24:54,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052705414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:54,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:54,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-07-13 18:24:54,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138747338] [2021-07-13 18:24:54,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:24:54,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:54,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:24:54,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:24:54,114 INFO L87 Difference]: Start difference. First operand 99180 states and 265252 transitions. Second operand has 19 states, 19 states have (on average 20.736842105263158) internal successors, (394), 19 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:55,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:55,148 INFO L93 Difference]: Finished difference Result 135530 states and 359644 transitions. [2021-07-13 18:24:55,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 18:24:55,148 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.736842105263158) internal successors, (394), 19 states have internal predecessors, (394), 0 states have call successors, (0), 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 [2021-07-13 18:24:55,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:55,718 INFO L225 Difference]: With dead ends: 135530 [2021-07-13 18:24:55,718 INFO L226 Difference]: Without dead ends: 135530 [2021-07-13 18:24:55,718 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 492.4ms TimeCoverageRelationStatistics Valid=373, Invalid=1033, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 18:24:55,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135530 states. [2021-07-13 18:24:57,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135530 to 97360. [2021-07-13 18:24:57,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97360 states, 97358 states have (on average 2.6739559152817436) internal successors, (260331), 97359 states have internal predecessors, (260331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:58,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97360 states to 97360 states and 260331 transitions. [2021-07-13 18:24:58,210 INFO L78 Accepts]: Start accepts. Automaton has 97360 states and 260331 transitions. Word has length 408 [2021-07-13 18:24:58,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:58,210 INFO L482 AbstractCegarLoop]: Abstraction has 97360 states and 260331 transitions. [2021-07-13 18:24:58,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.736842105263158) internal successors, (394), 19 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:58,211 INFO L276 IsEmpty]: Start isEmpty. Operand 97360 states and 260331 transitions. [2021-07-13 18:24:58,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-13 18:24:58,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:58,378 INFO L508 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] [2021-07-13 18:24:58,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-13 18:24:58,579 INFO L430 AbstractCegarLoop]: === Iteration 69 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:58,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:58,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1850125628, now seen corresponding path program 29 times [2021-07-13 18:24:58,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:58,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668351031] [2021-07-13 18:24:58,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:58,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:58,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1084 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:24:58,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:58,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668351031] [2021-07-13 18:24:58,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668351031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:58,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226305726] [2021-07-13 18:24:58,740 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 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 [2021-07-13 18:24:59,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 18:24:59,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:24:59,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:24:59,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:59,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1060 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-07-13 18:24:59,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226305726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:59,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:59,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-07-13 18:24:59,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839963872] [2021-07-13 18:24:59,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:24:59,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:59,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:24:59,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:24:59,774 INFO L87 Difference]: Start difference. First operand 97360 states and 260331 transitions. Second operand has 19 states, 19 states have (on average 20.736842105263158) internal successors, (394), 19 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:00,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:00,676 INFO L93 Difference]: Finished difference Result 126655 states and 336138 transitions. [2021-07-13 18:25:00,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 18:25:00,677 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.736842105263158) internal successors, (394), 19 states have internal predecessors, (394), 0 states have call successors, (0), 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 [2021-07-13 18:25:00,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:00,977 INFO L225 Difference]: With dead ends: 126655 [2021-07-13 18:25:00,977 INFO L226 Difference]: Without dead ends: 126655 [2021-07-13 18:25:00,978 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 253.4ms TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 18:25:01,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126655 states. [2021-07-13 18:25:03,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126655 to 98440. [2021-07-13 18:25:03,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98440 states, 98438 states have (on average 2.6746276844308094) internal successors, (263285), 98439 states have internal predecessors, (263285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:03,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98440 states to 98440 states and 263285 transitions. [2021-07-13 18:25:03,654 INFO L78 Accepts]: Start accepts. Automaton has 98440 states and 263285 transitions. Word has length 408 [2021-07-13 18:25:03,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:03,654 INFO L482 AbstractCegarLoop]: Abstraction has 98440 states and 263285 transitions. [2021-07-13 18:25:03,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.736842105263158) internal successors, (394), 19 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:03,654 INFO L276 IsEmpty]: Start isEmpty. Operand 98440 states and 263285 transitions. [2021-07-13 18:25:04,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-13 18:25:04,252 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:04,253 INFO L508 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] [2021-07-13 18:25:04,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-13 18:25:04,478 INFO L430 AbstractCegarLoop]: === Iteration 70 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:04,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:04,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1705856026, now seen corresponding path program 30 times [2021-07-13 18:25:04,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:04,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024760686] [2021-07-13 18:25:04,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1084 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:25:04,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:04,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024760686] [2021-07-13 18:25:04,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024760686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:04,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823418138] [2021-07-13 18:25:04,645 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 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 [2021-07-13 18:25:04,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 18:25:04,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:25:04,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:25:04,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1060 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-07-13 18:25:05,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823418138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:05,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:05,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-07-13 18:25:05,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094649668] [2021-07-13 18:25:05,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:25:05,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:05,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:25:05,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:25:05,403 INFO L87 Difference]: Start difference. First operand 98440 states and 263285 transitions. Second operand has 19 states, 19 states have (on average 20.736842105263158) internal successors, (394), 19 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:06,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:06,388 INFO L93 Difference]: Finished difference Result 123140 states and 326668 transitions. [2021-07-13 18:25:06,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:25:06,389 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.736842105263158) internal successors, (394), 19 states have internal predecessors, (394), 0 states have call successors, (0), 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 [2021-07-13 18:25:06,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:06,686 INFO L225 Difference]: With dead ends: 123140 [2021-07-13 18:25:06,686 INFO L226 Difference]: Without dead ends: 123140 [2021-07-13 18:25:06,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 264.5ms TimeCoverageRelationStatistics Valid=393, Invalid=1167, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 18:25:07,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123140 states. [2021-07-13 18:25:08,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123140 to 99520. [2021-07-13 18:25:08,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99520 states, 99518 states have (on average 2.6752848730882857) internal successors, (266239), 99519 states have internal predecessors, (266239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:09,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99520 states to 99520 states and 266239 transitions. [2021-07-13 18:25:09,603 INFO L78 Accepts]: Start accepts. Automaton has 99520 states and 266239 transitions. Word has length 408 [2021-07-13 18:25:09,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:09,604 INFO L482 AbstractCegarLoop]: Abstraction has 99520 states and 266239 transitions. [2021-07-13 18:25:09,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.736842105263158) internal successors, (394), 19 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:09,604 INFO L276 IsEmpty]: Start isEmpty. Operand 99520 states and 266239 transitions. [2021-07-13 18:25:09,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-13 18:25:09,766 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:09,766 INFO L508 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] [2021-07-13 18:25:09,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-13 18:25:09,967 INFO L430 AbstractCegarLoop]: === Iteration 71 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:09,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:09,968 INFO L82 PathProgramCache]: Analyzing trace with hash -620128342, now seen corresponding path program 31 times [2021-07-13 18:25:09,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:09,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371305814] [2021-07-13 18:25:09,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:09,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:10,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:25:10,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:10,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371305814] [2021-07-13 18:25:10,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371305814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:10,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346229963] [2021-07-13 18:25:10,118 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 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 [2021-07-13 18:25:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:10,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:25:10,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:11,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:25:11,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346229963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:11,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:11,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:25:11,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683850029] [2021-07-13 18:25:11,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:25:11,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:11,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:25:11,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:25:11,035 INFO L87 Difference]: Start difference. First operand 99520 states and 266239 transitions. Second operand has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:11,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:11,905 INFO L93 Difference]: Finished difference Result 126050 states and 333514 transitions. [2021-07-13 18:25:11,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 18:25:11,905 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 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 [2021-07-13 18:25:11,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:12,209 INFO L225 Difference]: With dead ends: 126050 [2021-07-13 18:25:12,209 INFO L226 Difference]: Without dead ends: 126050 [2021-07-13 18:25:12,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 218.9ms TimeCoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 18:25:12,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126050 states. [2021-07-13 18:25:14,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126050 to 96880. [2021-07-13 18:25:14,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96880 states, 96878 states have (on average 2.673744296950804) internal successors, (259027), 96879 states have internal predecessors, (259027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:14,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96880 states to 96880 states and 259027 transitions. [2021-07-13 18:25:14,756 INFO L78 Accepts]: Start accepts. Automaton has 96880 states and 259027 transitions. Word has length 408 [2021-07-13 18:25:14,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:14,756 INFO L482 AbstractCegarLoop]: Abstraction has 96880 states and 259027 transitions. [2021-07-13 18:25:14,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:14,757 INFO L276 IsEmpty]: Start isEmpty. Operand 96880 states and 259027 transitions. [2021-07-13 18:25:14,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-13 18:25:14,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:14,917 INFO L508 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] [2021-07-13 18:25:15,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:25:15,118 INFO L430 AbstractCegarLoop]: === Iteration 72 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:15,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:15,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1330521812, now seen corresponding path program 32 times [2021-07-13 18:25:15,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:15,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970334967] [2021-07-13 18:25:15,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:15,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:15,600 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-07-13 18:25:15,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:25:15,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:15,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970334967] [2021-07-13 18:25:15,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970334967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:15,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984994358] [2021-07-13 18:25:15,707 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 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 [2021-07-13 18:25:15,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:25:15,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:25:15,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:25:15,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:25:16,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984994358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:16,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:16,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:25:16,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942939469] [2021-07-13 18:25:16,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:25:16,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:16,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:25:16,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:25:16,305 INFO L87 Difference]: Start difference. First operand 96880 states and 259027 transitions. Second operand has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:17,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:17,449 INFO L93 Difference]: Finished difference Result 159640 states and 424263 transitions. [2021-07-13 18:25:17,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 18:25:17,450 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 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 [2021-07-13 18:25:17,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:17,877 INFO L225 Difference]: With dead ends: 159640 [2021-07-13 18:25:17,877 INFO L226 Difference]: Without dead ends: 159640 [2021-07-13 18:25:17,877 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 239.2ms TimeCoverageRelationStatistics Valid=306, Invalid=884, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 18:25:18,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159640 states. [2021-07-13 18:25:20,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159640 to 104500. [2021-07-13 18:25:20,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104500 states, 104498 states have (on average 2.676587111715057) internal successors, (279698), 104499 states have internal predecessors, (279698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:21,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104500 states to 104500 states and 279698 transitions. [2021-07-13 18:25:21,028 INFO L78 Accepts]: Start accepts. Automaton has 104500 states and 279698 transitions. Word has length 408 [2021-07-13 18:25:21,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:21,028 INFO L482 AbstractCegarLoop]: Abstraction has 104500 states and 279698 transitions. [2021-07-13 18:25:21,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:21,029 INFO L276 IsEmpty]: Start isEmpty. Operand 104500 states and 279698 transitions. [2021-07-13 18:25:21,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-13 18:25:21,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:21,722 INFO L508 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] [2021-07-13 18:25:21,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:25:21,925 INFO L430 AbstractCegarLoop]: === Iteration 73 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:21,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:21,925 INFO L82 PathProgramCache]: Analyzing trace with hash -183513110, now seen corresponding path program 33 times [2021-07-13 18:25:21,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:21,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038336709] [2021-07-13 18:25:21,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:21,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:25:22,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:22,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038336709] [2021-07-13 18:25:22,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038336709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:22,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709272350] [2021-07-13 18:25:22,073 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 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 [2021-07-13 18:25:22,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 18:25:22,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:25:22,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:25:22,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:22,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:25:22,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709272350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:22,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:22,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:25:22,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740746794] [2021-07-13 18:25:22,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:25:22,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:22,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:25:22,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:25:22,903 INFO L87 Difference]: Start difference. First operand 104500 states and 279698 transitions. Second operand has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:23,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:23,955 INFO L93 Difference]: Finished difference Result 151865 states and 404132 transitions. [2021-07-13 18:25:23,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 18:25:23,956 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 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 [2021-07-13 18:25:23,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:24,598 INFO L225 Difference]: With dead ends: 151865 [2021-07-13 18:25:24,599 INFO L226 Difference]: Without dead ends: 151865 [2021-07-13 18:25:24,599 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 228.6ms TimeCoverageRelationStatistics Valid=315, Invalid=945, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 18:25:24,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151865 states. [2021-07-13 18:25:26,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151865 to 105580. [2021-07-13 18:25:27,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105580 states, 105578 states have (on average 2.677186535073595) internal successors, (282652), 105579 states have internal predecessors, (282652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:27,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105580 states to 105580 states and 282652 transitions. [2021-07-13 18:25:27,407 INFO L78 Accepts]: Start accepts. Automaton has 105580 states and 282652 transitions. Word has length 408 [2021-07-13 18:25:27,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:27,408 INFO L482 AbstractCegarLoop]: Abstraction has 105580 states and 282652 transitions. [2021-07-13 18:25:27,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:27,408 INFO L276 IsEmpty]: Start isEmpty. Operand 105580 states and 282652 transitions. [2021-07-13 18:25:28,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-13 18:25:28,085 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:28,085 INFO L508 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] [2021-07-13 18:25:28,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:25:28,301 INFO L430 AbstractCegarLoop]: === Iteration 74 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:28,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:28,301 INFO L82 PathProgramCache]: Analyzing trace with hash 555472532, now seen corresponding path program 34 times [2021-07-13 18:25:28,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:28,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787256688] [2021-07-13 18:25:28,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:28,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:28,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:25:28,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:28,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787256688] [2021-07-13 18:25:28,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787256688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:28,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627569792] [2021-07-13 18:25:28,446 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 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 [2021-07-13 18:25:28,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:25:28,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:25:28,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:25:28,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:29,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:25:29,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627569792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:29,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:29,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:25:29,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438302236] [2021-07-13 18:25:29,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:25:29,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:29,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:25:29,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:25:29,284 INFO L87 Difference]: Start difference. First operand 105580 states and 282652 transitions. Second operand has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:30,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:30,277 INFO L93 Difference]: Finished difference Result 143995 states and 382595 transitions. [2021-07-13 18:25:30,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:25:30,277 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 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 [2021-07-13 18:25:30,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:30,907 INFO L225 Difference]: With dead ends: 143995 [2021-07-13 18:25:30,907 INFO L226 Difference]: Without dead ends: 143995 [2021-07-13 18:25:30,907 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 237.0ms TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 18:25:31,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143995 states. [2021-07-13 18:25:33,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143995 to 104500. [2021-07-13 18:25:33,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104500 states, 104498 states have (on average 2.676587111715057) internal successors, (279698), 104499 states have internal predecessors, (279698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:33,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104500 states to 104500 states and 279698 transitions. [2021-07-13 18:25:33,698 INFO L78 Accepts]: Start accepts. Automaton has 104500 states and 279698 transitions. Word has length 408 [2021-07-13 18:25:33,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:33,699 INFO L482 AbstractCegarLoop]: Abstraction has 104500 states and 279698 transitions. [2021-07-13 18:25:33,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:33,699 INFO L276 IsEmpty]: Start isEmpty. Operand 104500 states and 279698 transitions. [2021-07-13 18:25:33,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-13 18:25:33,905 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:33,905 INFO L508 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] [2021-07-13 18:25:34,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-07-13 18:25:34,106 INFO L430 AbstractCegarLoop]: === Iteration 75 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:34,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:34,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1569293594, now seen corresponding path program 35 times [2021-07-13 18:25:34,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:34,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647138438] [2021-07-13 18:25:34,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:34,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:25:34,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:34,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647138438] [2021-07-13 18:25:34,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647138438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:34,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526662742] [2021-07-13 18:25:34,715 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 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 [2021-07-13 18:25:35,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 18:25:35,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:25:35,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:25:35,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:35,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:25:35,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526662742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:35,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:35,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:25:35,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629677636] [2021-07-13 18:25:35,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:25:35,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:35,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:25:35,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:25:35,649 INFO L87 Difference]: Start difference. First operand 104500 states and 279698 transitions. Second operand has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:36,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:36,570 INFO L93 Difference]: Finished difference Result 136115 states and 360628 transitions. [2021-07-13 18:25:36,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 18:25:36,571 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 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 [2021-07-13 18:25:36,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:36,900 INFO L225 Difference]: With dead ends: 136115 [2021-07-13 18:25:36,901 INFO L226 Difference]: Without dead ends: 136115 [2021-07-13 18:25:36,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 247.7ms TimeCoverageRelationStatistics Valid=318, Invalid=942, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 18:25:37,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136115 states. [2021-07-13 18:25:39,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136115 to 101860. [2021-07-13 18:25:39,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101860 states, 101858 states have (on average 2.675155608788706) internal successors, (272486), 101859 states have internal predecessors, (272486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:39,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101860 states to 101860 states and 272486 transitions. [2021-07-13 18:25:39,844 INFO L78 Accepts]: Start accepts. Automaton has 101860 states and 272486 transitions. Word has length 408 [2021-07-13 18:25:39,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:39,845 INFO L482 AbstractCegarLoop]: Abstraction has 101860 states and 272486 transitions. [2021-07-13 18:25:39,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:39,845 INFO L276 IsEmpty]: Start isEmpty. Operand 101860 states and 272486 transitions. [2021-07-13 18:25:40,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-13 18:25:40,036 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:40,037 INFO L508 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] [2021-07-13 18:25:40,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:25:40,238 INFO L430 AbstractCegarLoop]: === Iteration 76 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:40,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:40,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1211638780, now seen corresponding path program 36 times [2021-07-13 18:25:40,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:40,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427699385] [2021-07-13 18:25:40,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:40,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:40,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:25:40,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:40,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427699385] [2021-07-13 18:25:40,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427699385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:40,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002731943] [2021-07-13 18:25:40,390 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 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 [2021-07-13 18:25:40,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 18:25:40,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:25:40,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:25:40,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:25:41,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002731943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:41,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:41,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:25:41,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844826476] [2021-07-13 18:25:41,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:25:41,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:41,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:25:41,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:25:41,444 INFO L87 Difference]: Start difference. First operand 101860 states and 272486 transitions. Second operand has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:42,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:42,551 INFO L93 Difference]: Finished difference Result 182905 states and 487826 transitions. [2021-07-13 18:25:42,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 18:25:42,552 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 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 [2021-07-13 18:25:42,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:42,997 INFO L225 Difference]: With dead ends: 182905 [2021-07-13 18:25:42,997 INFO L226 Difference]: Without dead ends: 182905 [2021-07-13 18:25:42,998 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 230.1ms TimeCoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 18:25:43,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182905 states. [2021-07-13 18:25:45,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182905 to 108740. [2021-07-13 18:25:45,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108740 states, 108738 states have (on average 2.677904688333425) internal successors, (291190), 108739 states have internal predecessors, (291190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:46,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108740 states to 108740 states and 291190 transitions. [2021-07-13 18:25:46,307 INFO L78 Accepts]: Start accepts. Automaton has 108740 states and 291190 transitions. Word has length 408 [2021-07-13 18:25:46,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:46,745 INFO L482 AbstractCegarLoop]: Abstraction has 108740 states and 291190 transitions. [2021-07-13 18:25:46,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:46,745 INFO L276 IsEmpty]: Start isEmpty. Operand 108740 states and 291190 transitions. [2021-07-13 18:25:47,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-13 18:25:47,033 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:47,033 INFO L508 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] [2021-07-13 18:25:47,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:25:47,234 INFO L430 AbstractCegarLoop]: === Iteration 77 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:47,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:47,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1950624422, now seen corresponding path program 37 times [2021-07-13 18:25:47,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:47,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767930846] [2021-07-13 18:25:47,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:47,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:25:47,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:47,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767930846] [2021-07-13 18:25:47,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767930846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:47,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215129130] [2021-07-13 18:25:47,387 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 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 [2021-07-13 18:25:47,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:47,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:25:47,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:47,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:25:47,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215129130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:47,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:47,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:25:47,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625028601] [2021-07-13 18:25:48,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:25:48,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:48,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:25:48,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:25:48,228 INFO L87 Difference]: Start difference. First operand 108740 states and 291190 transitions. Second operand has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:49,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:49,409 INFO L93 Difference]: Finished difference Result 167880 states and 447060 transitions. [2021-07-13 18:25:49,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:25:49,409 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 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 [2021-07-13 18:25:49,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:49,883 INFO L225 Difference]: With dead ends: 167880 [2021-07-13 18:25:49,883 INFO L226 Difference]: Without dead ends: 167880 [2021-07-13 18:25:49,883 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 241.2ms TimeCoverageRelationStatistics Valid=325, Invalid=1007, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 18:25:50,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167880 states. [2021-07-13 18:25:52,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167880 to 111640. [2021-07-13 18:25:52,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111640 states, 111638 states have (on average 2.6788817427757574) internal successors, (299065), 111639 states have internal predecessors, (299065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:53,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111640 states to 111640 states and 299065 transitions. [2021-07-13 18:25:53,261 INFO L78 Accepts]: Start accepts. Automaton has 111640 states and 299065 transitions. Word has length 408 [2021-07-13 18:25:53,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:53,262 INFO L482 AbstractCegarLoop]: Abstraction has 111640 states and 299065 transitions. [2021-07-13 18:25:53,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:53,262 INFO L276 IsEmpty]: Start isEmpty. Operand 111640 states and 299065 transitions. [2021-07-13 18:25:53,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-13 18:25:53,481 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:53,482 INFO L508 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] [2021-07-13 18:25:53,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:25:53,682 INFO L430 AbstractCegarLoop]: === Iteration 78 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:53,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:53,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1577373994, now seen corresponding path program 38 times [2021-07-13 18:25:53,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:53,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956162279] [2021-07-13 18:25:53,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:25:53,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:53,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956162279] [2021-07-13 18:25:53,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956162279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:53,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909522956] [2021-07-13 18:25:53,827 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 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 [2021-07-13 18:25:54,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:25:54,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:25:54,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:25:54,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:54,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:25:54,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909522956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:54,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:54,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:25:54,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175772399] [2021-07-13 18:25:54,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:25:54,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:54,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:25:54,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:25:54,814 INFO L87 Difference]: Start difference. First operand 111640 states and 299065 transitions. Second operand has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:55,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:55,935 INFO L93 Difference]: Finished difference Result 141390 states and 375856 transitions. [2021-07-13 18:25:55,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:25:55,936 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 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 [2021-07-13 18:25:55,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:56,539 INFO L225 Difference]: With dead ends: 141390 [2021-07-13 18:25:56,540 INFO L226 Difference]: Without dead ends: 141390 [2021-07-13 18:25:56,540 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 235.1ms TimeCoverageRelationStatistics Valid=328, Invalid=1004, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 18:25:56,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141390 states. [2021-07-13 18:25:58,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141390 to 117700. [2021-07-13 18:25:59,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117700 states, 117698 states have (on average 2.6804023857669628) internal successors, (315478), 117699 states have internal predecessors, (315478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:59,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117700 states to 117700 states and 315478 transitions. [2021-07-13 18:25:59,812 INFO L78 Accepts]: Start accepts. Automaton has 117700 states and 315478 transitions. Word has length 408 [2021-07-13 18:25:59,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:59,813 INFO L482 AbstractCegarLoop]: Abstraction has 117700 states and 315478 transitions. [2021-07-13 18:25:59,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:59,813 INFO L276 IsEmpty]: Start isEmpty. Operand 117700 states and 315478 transitions. [2021-07-13 18:26:00,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-13 18:26:00,049 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:00,049 INFO L508 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] [2021-07-13 18:26:00,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-07-13 18:26:00,250 INFO L430 AbstractCegarLoop]: === Iteration 79 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:00,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:00,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1978607660, now seen corresponding path program 39 times [2021-07-13 18:26:00,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:00,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211079877] [2021-07-13 18:26:00,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:00,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:00,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:26:00,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:00,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211079877] [2021-07-13 18:26:00,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211079877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:00,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255020290] [2021-07-13 18:26:00,399 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 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 [2021-07-13 18:26:01,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 18:26:01,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:01,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:26:01,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:26:01,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255020290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:01,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:01,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:26:01,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849109166] [2021-07-13 18:26:01,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:26:01,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:01,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:26:01,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:26:01,494 INFO L87 Difference]: Start difference. First operand 117700 states and 315478 transitions. Second operand has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:02,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:02,571 INFO L93 Difference]: Finished difference Result 187300 states and 500018 transitions. [2021-07-13 18:26:02,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:26:02,572 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 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 [2021-07-13 18:26:02,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:03,361 INFO L225 Difference]: With dead ends: 187300 [2021-07-13 18:26:03,361 INFO L226 Difference]: Without dead ends: 187300 [2021-07-13 18:26:03,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 236.1ms TimeCoverageRelationStatistics Valid=326, Invalid=1006, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 18:26:03,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187300 states. [2021-07-13 18:26:06,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187300 to 120600. [2021-07-13 18:26:06,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120600 states, 120598 states have (on average 2.681246786845553) internal successors, (323353), 120599 states have internal predecessors, (323353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:06,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120600 states to 120600 states and 323353 transitions. [2021-07-13 18:26:06,984 INFO L78 Accepts]: Start accepts. Automaton has 120600 states and 323353 transitions. Word has length 408 [2021-07-13 18:26:06,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:06,985 INFO L482 AbstractCegarLoop]: Abstraction has 120600 states and 323353 transitions. [2021-07-13 18:26:06,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:06,985 INFO L276 IsEmpty]: Start isEmpty. Operand 120600 states and 323353 transitions. [2021-07-13 18:26:07,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-13 18:26:07,223 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:07,223 INFO L508 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] [2021-07-13 18:26:07,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:07,424 INFO L430 AbstractCegarLoop]: === Iteration 80 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:07,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:07,424 INFO L82 PathProgramCache]: Analyzing trace with hash -757354138, now seen corresponding path program 40 times [2021-07-13 18:26:07,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:07,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437395577] [2021-07-13 18:26:07,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:07,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:26:08,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:08,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437395577] [2021-07-13 18:26:08,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437395577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:08,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326615670] [2021-07-13 18:26:08,056 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 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 [2021-07-13 18:26:08,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:26:08,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:08,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:26:08,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:26:08,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326615670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:08,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:08,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:26:08,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983894964] [2021-07-13 18:26:08,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:26:08,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:08,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:26:08,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:26:08,853 INFO L87 Difference]: Start difference. First operand 120600 states and 323353 transitions. Second operand has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:09,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:09,813 INFO L93 Difference]: Finished difference Result 145420 states and 386923 transitions. [2021-07-13 18:26:09,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 18:26:09,814 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 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 [2021-07-13 18:26:09,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:10,176 INFO L225 Difference]: With dead ends: 145420 [2021-07-13 18:26:10,177 INFO L226 Difference]: Without dead ends: 145420 [2021-07-13 18:26:10,177 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 249.4ms TimeCoverageRelationStatistics Valid=338, Invalid=1068, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 18:26:10,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145420 states. [2021-07-13 18:26:12,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145420 to 122420. [2021-07-13 18:26:13,076 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) [2021-07-13 18:26:13,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122420 states to 122420 states and 328274 transitions. [2021-07-13 18:26:13,431 INFO L78 Accepts]: Start accepts. Automaton has 122420 states and 328274 transitions. Word has length 408 [2021-07-13 18:26:13,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:13,432 INFO L482 AbstractCegarLoop]: Abstraction has 122420 states and 328274 transitions. [2021-07-13 18:26:13,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:13,432 INFO L276 IsEmpty]: Start isEmpty. Operand 122420 states and 328274 transitions. [2021-07-13 18:26:14,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-07-13 18:26:14,178 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:14,178 INFO L508 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] [2021-07-13 18:26:14,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-13 18:26:14,379 INFO L430 AbstractCegarLoop]: === Iteration 81 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:14,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:14,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1363794865, now seen corresponding path program 27 times [2021-07-13 18:26:14,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:14,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125959806] [2021-07-13 18:26:14,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:14,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1383 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-07-13 18:26:14,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:14,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125959806] [2021-07-13 18:26:14,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125959806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:14,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141978063] [2021-07-13 18:26:14,621 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 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 [2021-07-13 18:26:15,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 18:26:15,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:15,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:26:15,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:15,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:26:15,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141978063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:15,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:15,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 22 [2021-07-13 18:26:15,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524000122] [2021-07-13 18:26:15,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 18:26:15,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:15,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 18:26:15,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-13 18:26:15,934 INFO L87 Difference]: Start difference. First operand 122420 states and 328274 transitions. Second operand has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:17,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:17,043 INFO L93 Difference]: Finished difference Result 135850 states and 361956 transitions. [2021-07-13 18:26:17,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 18:26:17,043 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 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 [2021-07-13 18:26:17,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:17,404 INFO L225 Difference]: With dead ends: 135850 [2021-07-13 18:26:17,404 INFO L226 Difference]: Without dead ends: 135850 [2021-07-13 18:26:17,405 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 352.3ms TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 18:26:17,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135850 states. [2021-07-13 18:26:19,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135850 to 123500. [2021-07-13 18:26:20,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123500 states, 123498 states have (on average 2.6820515311988857) internal successors, (331228), 123499 states have internal predecessors, (331228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:20,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123500 states to 123500 states and 331228 transitions. [2021-07-13 18:26:20,832 INFO L78 Accepts]: Start accepts. Automaton has 123500 states and 331228 transitions. Word has length 409 [2021-07-13 18:26:20,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:20,833 INFO L482 AbstractCegarLoop]: Abstraction has 123500 states and 331228 transitions. [2021-07-13 18:26:20,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:20,833 INFO L276 IsEmpty]: Start isEmpty. Operand 123500 states and 331228 transitions. [2021-07-13 18:26:21,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-07-13 18:26:21,068 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:21,068 INFO L508 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] [2021-07-13 18:26:21,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:21,269 INFO L430 AbstractCegarLoop]: === Iteration 82 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:21,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:21,269 INFO L82 PathProgramCache]: Analyzing trace with hash 443458681, now seen corresponding path program 28 times [2021-07-13 18:26:21,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:21,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839357732] [2021-07-13 18:26:21,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:21,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:26:21,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:21,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839357732] [2021-07-13 18:26:21,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839357732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:21,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483407064] [2021-07-13 18:26:21,835 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 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 [2021-07-13 18:26:22,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:26:22,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:22,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:26:22,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:22,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:26:22,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483407064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:22,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:22,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-13 18:26:22,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246929197] [2021-07-13 18:26:22,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 18:26:22,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:22,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 18:26:22,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-13 18:26:22,510 INFO L87 Difference]: Start difference. First operand 123500 states and 331228 transitions. Second operand has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:23,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:23,463 INFO L93 Difference]: Finished difference Result 143405 states and 381139 transitions. [2021-07-13 18:26:23,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 18:26:23,464 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 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 [2021-07-13 18:26:23,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:23,796 INFO L225 Difference]: With dead ends: 143405 [2021-07-13 18:26:23,797 INFO L226 Difference]: Without dead ends: 143405 [2021-07-13 18:26:23,797 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 673.8ms TimeCoverageRelationStatistics Valid=451, Invalid=1109, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 18:26:24,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143405 states. [2021-07-13 18:26:26,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143405 to 123500. [2021-07-13 18:26:26,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123500 states, 123498 states have (on average 2.6820515311988857) internal successors, (331228), 123499 states have internal predecessors, (331228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:27,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123500 states to 123500 states and 331228 transitions. [2021-07-13 18:26:27,571 INFO L78 Accepts]: Start accepts. Automaton has 123500 states and 331228 transitions. Word has length 409 [2021-07-13 18:26:27,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:27,571 INFO L482 AbstractCegarLoop]: Abstraction has 123500 states and 331228 transitions. [2021-07-13 18:26:27,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:27,571 INFO L276 IsEmpty]: Start isEmpty. Operand 123500 states and 331228 transitions. [2021-07-13 18:26:27,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-07-13 18:26:27,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:27,836 INFO L508 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] [2021-07-13 18:26:28,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:28,037 INFO L430 AbstractCegarLoop]: === Iteration 83 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:28,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:28,037 INFO L82 PathProgramCache]: Analyzing trace with hash 338033807, now seen corresponding path program 29 times [2021-07-13 18:26:28,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:28,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588641] [2021-07-13 18:26:28,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:28,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:26:28,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:28,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588641] [2021-07-13 18:26:28,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:28,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159265408] [2021-07-13 18:26:28,220 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 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 [2021-07-13 18:26:28,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 18:26:28,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:28,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:26:28,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:29,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:26:29,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159265408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:29,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:29,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-13 18:26:29,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352641743] [2021-07-13 18:26:29,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 18:26:29,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:29,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 18:26:29,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-13 18:26:29,264 INFO L87 Difference]: Start difference. First operand 123500 states and 331228 transitions. Second operand has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:30,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:30,362 INFO L93 Difference]: Finished difference Result 144155 states and 383479 transitions. [2021-07-13 18:26:30,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 18:26:30,362 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 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 [2021-07-13 18:26:30,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:30,713 INFO L225 Difference]: With dead ends: 144155 [2021-07-13 18:26:30,713 INFO L226 Difference]: Without dead ends: 144155 [2021-07-13 18:26:30,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 299.0ms TimeCoverageRelationStatistics Valid=462, Invalid=1178, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 18:26:30,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144155 states. [2021-07-13 18:26:33,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144155 to 121340. [2021-07-13 18:26:33,566 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) [2021-07-13 18:26:34,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121340 states to 121340 states and 325320 transitions. [2021-07-13 18:26:34,463 INFO L78 Accepts]: Start accepts. Automaton has 121340 states and 325320 transitions. Word has length 409 [2021-07-13 18:26:34,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:34,463 INFO L482 AbstractCegarLoop]: Abstraction has 121340 states and 325320 transitions. [2021-07-13 18:26:34,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:34,464 INFO L276 IsEmpty]: Start isEmpty. Operand 121340 states and 325320 transitions. [2021-07-13 18:26:34,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-07-13 18:26:34,781 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:34,781 INFO L508 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] [2021-07-13 18:26:35,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:35,007 INFO L430 AbstractCegarLoop]: === Iteration 84 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:35,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:35,007 INFO L82 PathProgramCache]: Analyzing trace with hash -743001031, now seen corresponding path program 30 times [2021-07-13 18:26:35,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:35,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148289433] [2021-07-13 18:26:35,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:35,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:26:35,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:35,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148289433] [2021-07-13 18:26:35,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148289433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:35,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604787626] [2021-07-13 18:26:35,270 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 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 [2021-07-13 18:26:35,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-13 18:26:35,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:35,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:26:35,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:36,307 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:26:36,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:26:36,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604787626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:36,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:36,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-13 18:26:36,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621176251] [2021-07-13 18:26:36,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 18:26:36,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:36,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 18:26:36,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-13 18:26:36,795 INFO L87 Difference]: Start difference. First operand 121340 states and 325320 transitions. Second operand has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:37,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:37,911 INFO L93 Difference]: Finished difference Result 149875 states and 398204 transitions. [2021-07-13 18:26:37,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:26:37,912 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 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 [2021-07-13 18:26:37,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:38,307 INFO L225 Difference]: With dead ends: 149875 [2021-07-13 18:26:38,307 INFO L226 Difference]: Without dead ends: 149875 [2021-07-13 18:26:38,307 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 339.0ms TimeCoverageRelationStatistics Valid=473, Invalid=1249, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 18:26:38,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149875 states. [2021-07-13 18:26:41,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149875 to 123160. [2021-07-13 18:26:41,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123160 states, 123158 states have (on average 2.6814417252634826) internal successors, (330241), 123159 states have internal predecessors, (330241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:41,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123160 states to 123160 states and 330241 transitions. [2021-07-13 18:26:41,642 INFO L78 Accepts]: Start accepts. Automaton has 123160 states and 330241 transitions. Word has length 409 [2021-07-13 18:26:41,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:41,643 INFO L482 AbstractCegarLoop]: Abstraction has 123160 states and 330241 transitions. [2021-07-13 18:26:41,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:41,643 INFO L276 IsEmpty]: Start isEmpty. Operand 123160 states and 330241 transitions. [2021-07-13 18:26:42,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-07-13 18:26:42,338 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:42,338 INFO L508 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] [2021-07-13 18:26:42,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:42,539 INFO L430 AbstractCegarLoop]: === Iteration 85 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:42,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:42,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1003422927, now seen corresponding path program 31 times [2021-07-13 18:26:42,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:42,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25756813] [2021-07-13 18:26:42,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:42,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:42,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:26:42,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:42,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25756813] [2021-07-13 18:26:42,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25756813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:42,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553534844] [2021-07-13 18:26:42,716 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 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 [2021-07-13 18:26:42,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:42,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:26:42,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:26:43,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553534844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:43,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:43,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-13 18:26:43,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089246708] [2021-07-13 18:26:43,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 18:26:43,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:43,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 18:26:43,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-13 18:26:43,316 INFO L87 Difference]: Start difference. First operand 123160 states and 330241 transitions. Second operand has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:44,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:44,362 INFO L93 Difference]: Finished difference Result 153705 states and 408249 transitions. [2021-07-13 18:26:44,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 18:26:44,362 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 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 [2021-07-13 18:26:44,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:45,010 INFO L225 Difference]: With dead ends: 153705 [2021-07-13 18:26:45,010 INFO L226 Difference]: Without dead ends: 153705 [2021-07-13 18:26:45,010 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 308.4ms TimeCoverageRelationStatistics Valid=484, Invalid=1322, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 18:26:45,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153705 states. [2021-07-13 18:26:47,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153705 to 126060. [2021-07-13 18:26:47,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126060 states, 126058 states have (on average 2.6822256421647177) internal successors, (338116), 126059 states have internal predecessors, (338116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:48,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126060 states to 126060 states and 338116 transitions. [2021-07-13 18:26:48,576 INFO L78 Accepts]: Start accepts. Automaton has 126060 states and 338116 transitions. Word has length 409 [2021-07-13 18:26:48,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:48,577 INFO L482 AbstractCegarLoop]: Abstraction has 126060 states and 338116 transitions. [2021-07-13 18:26:48,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:48,577 INFO L276 IsEmpty]: Start isEmpty. Operand 126060 states and 338116 transitions. [2021-07-13 18:26:48,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-07-13 18:26:48,833 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:48,833 INFO L508 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] [2021-07-13 18:26:49,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:49,034 INFO L430 AbstractCegarLoop]: === Iteration 86 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:49,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:49,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1340894215, now seen corresponding path program 32 times [2021-07-13 18:26:49,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:49,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81119544] [2021-07-13 18:26:49,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:49,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:49,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:26:49,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:49,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81119544] [2021-07-13 18:26:49,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81119544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:49,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839623202] [2021-07-13 18:26:49,255 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 [2021-07-13 18:26:49,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:26:49,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:49,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:26:49,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:49,927 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:26:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:26:50,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839623202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:50,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:50,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-13 18:26:50,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318663323] [2021-07-13 18:26:50,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 18:26:50,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:50,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 18:26:50,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-13 18:26:50,256 INFO L87 Difference]: Start difference. First operand 126060 states and 338116 transitions. Second operand has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:51,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:51,327 INFO L93 Difference]: Finished difference Result 154685 states and 410942 transitions. [2021-07-13 18:26:51,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 18:26:51,327 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 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 [2021-07-13 18:26:51,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:51,694 INFO L225 Difference]: With dead ends: 154685 [2021-07-13 18:26:51,695 INFO L226 Difference]: Without dead ends: 154685 [2021-07-13 18:26:51,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 335.8ms TimeCoverageRelationStatistics Valid=495, Invalid=1397, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 18:26:52,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154685 states. [2021-07-13 18:26:54,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154685 to 124240. [2021-07-13 18:26:54,707 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) [2021-07-13 18:26:55,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124240 states to 124240 states and 333195 transitions. [2021-07-13 18:26:55,078 INFO L78 Accepts]: Start accepts. Automaton has 124240 states and 333195 transitions. Word has length 409 [2021-07-13 18:26:55,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:55,078 INFO L482 AbstractCegarLoop]: Abstraction has 124240 states and 333195 transitions. [2021-07-13 18:26:55,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:55,079 INFO L276 IsEmpty]: Start isEmpty. Operand 124240 states and 333195 transitions. [2021-07-13 18:26:55,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-07-13 18:26:55,800 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:55,800 INFO L508 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] [2021-07-13 18:26:56,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:56,001 INFO L430 AbstractCegarLoop]: === Iteration 87 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:56,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:56,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1440038159, now seen corresponding path program 33 times [2021-07-13 18:26:56,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:56,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842521255] [2021-07-13 18:26:56,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:56,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:56,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:26:56,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:56,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842521255] [2021-07-13 18:26:56,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842521255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:56,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785358859] [2021-07-13 18:26:56,219 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 [2021-07-13 18:26:56,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 18:26:56,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:56,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:26:56,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:26:57,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785358859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:57,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:57,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-13 18:26:57,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265502107] [2021-07-13 18:26:57,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 18:26:57,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:57,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 18:26:57,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-13 18:26:57,092 INFO L87 Difference]: Start difference. First operand 124240 states and 333195 transitions. Second operand has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:58,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:58,482 INFO L93 Difference]: Finished difference Result 150175 states and 399151 transitions. [2021-07-13 18:26:58,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 18:26:58,483 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 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 [2021-07-13 18:26:58,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:58,852 INFO L225 Difference]: With dead ends: 150175 [2021-07-13 18:26:58,852 INFO L226 Difference]: Without dead ends: 150175 [2021-07-13 18:26:58,852 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 339.1ms TimeCoverageRelationStatistics Valid=506, Invalid=1474, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 18:26:59,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150175 states. [2021-07-13 18:27:01,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150175 to 124240. [2021-07-13 18:27:01,435 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) [2021-07-13 18:27:02,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124240 states to 124240 states and 333195 transitions. [2021-07-13 18:27:02,276 INFO L78 Accepts]: Start accepts. Automaton has 124240 states and 333195 transitions. Word has length 409 [2021-07-13 18:27:02,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:27:02,277 INFO L482 AbstractCegarLoop]: Abstraction has 124240 states and 333195 transitions. [2021-07-13 18:27:02,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:02,277 INFO L276 IsEmpty]: Start isEmpty. Operand 124240 states and 333195 transitions. [2021-07-13 18:27:02,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-07-13 18:27:02,540 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:27:02,540 INFO L508 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] [2021-07-13 18:27:02,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:27:02,741 INFO L430 AbstractCegarLoop]: === Iteration 88 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:27:02,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:27:02,741 INFO L82 PathProgramCache]: Analyzing trace with hash -2115943495, now seen corresponding path program 34 times [2021-07-13 18:27:02,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:27:02,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139082208] [2021-07-13 18:27:02,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:27:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:27:02,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:27:02,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:27:02,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139082208] [2021-07-13 18:27:02,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139082208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:02,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320267295] [2021-07-13 18:27:02,924 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 [2021-07-13 18:27:03,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:27:03,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:27:03,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:27:03,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:27:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:27:04,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320267295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:04,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:27:04,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-13 18:27:04,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570916718] [2021-07-13 18:27:04,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 18:27:04,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:27:04,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 18:27:04,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-13 18:27:04,267 INFO L87 Difference]: Start difference. First operand 124240 states and 333195 transitions. Second operand has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:05,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:27:05,369 INFO L93 Difference]: Finished difference Result 147225 states and 391741 transitions. [2021-07-13 18:27:05,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 18:27:05,370 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 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 [2021-07-13 18:27:05,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:27:05,758 INFO L225 Difference]: With dead ends: 147225 [2021-07-13 18:27:05,758 INFO L226 Difference]: Without dead ends: 147225 [2021-07-13 18:27:05,758 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 342.5ms TimeCoverageRelationStatistics Valid=517, Invalid=1553, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 18:27:06,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147225 states. [2021-07-13 18:27:08,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147225 to 121000. [2021-07-13 18:27:09,113 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) [2021-07-13 18:27:09,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121000 states to 121000 states and 324333 transitions. [2021-07-13 18:27:09,568 INFO L78 Accepts]: Start accepts. Automaton has 121000 states and 324333 transitions. Word has length 409 [2021-07-13 18:27:09,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:27:09,569 INFO L482 AbstractCegarLoop]: Abstraction has 121000 states and 324333 transitions. [2021-07-13 18:27:09,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:09,569 INFO L276 IsEmpty]: Start isEmpty. Operand 121000 states and 324333 transitions. [2021-07-13 18:27:10,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2021-07-13 18:27:10,308 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:27:10,308 INFO L508 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] [2021-07-13 18:27:10,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-07-13 18:27:10,509 INFO L430 AbstractCegarLoop]: === Iteration 89 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:27:10,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:27:10,509 INFO L82 PathProgramCache]: Analyzing trace with hash 276782368, now seen corresponding path program 11 times [2021-07-13 18:27:10,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:27:10,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959994425] [2021-07-13 18:27:10,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:27:10,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:27:10,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2123 backedges. 33 proven. 2090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:27:10,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:27:10,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959994425] [2021-07-13 18:27:10,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959994425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:10,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770874910] [2021-07-13 18:27:10,761 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 [2021-07-13 18:27:11,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-07-13 18:27:11,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:27:11,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:27:11,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:27:11,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2123 backedges. 33 proven. 2090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:27:11,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770874910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:11,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:27:11,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-07-13 18:27:11,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032157780] [2021-07-13 18:27:11,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 18:27:11,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:27:11,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 18:27:11,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-07-13 18:27:11,759 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) [2021-07-13 18:27:12,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:27:12,956 INFO L93 Difference]: Finished difference Result 134722 states and 359461 transitions. [2021-07-13 18:27:12,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 18:27:12,956 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 [2021-07-13 18:27:12,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:27:13,289 INFO L225 Difference]: With dead ends: 134722 [2021-07-13 18:27:13,289 INFO L226 Difference]: Without dead ends: 134722 [2021-07-13 18:27:13,289 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 433.6ms TimeCoverageRelationStatistics Valid=748, Invalid=1604, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 18:27:13,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134722 states. [2021-07-13 18:27:15,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134722 to 126475. [2021-07-13 18:27:16,099 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) [2021-07-13 18:27:16,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126475 states to 126475 states and 338949 transitions. [2021-07-13 18:27:16,511 INFO L78 Accepts]: Start accepts. Automaton has 126475 states and 338949 transitions. Word has length 439 [2021-07-13 18:27:16,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:27:16,512 INFO L482 AbstractCegarLoop]: Abstraction has 126475 states and 338949 transitions. [2021-07-13 18:27:16,512 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) [2021-07-13 18:27:16,512 INFO L276 IsEmpty]: Start isEmpty. Operand 126475 states and 338949 transitions. [2021-07-13 18:27:16,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-07-13 18:27:16,777 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:27:16,777 INFO L508 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] [2021-07-13 18:27:16,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:27:16,978 INFO L430 AbstractCegarLoop]: === Iteration 90 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:27:16,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:27:16,979 INFO L82 PathProgramCache]: Analyzing trace with hash -129130465, now seen corresponding path program 41 times [2021-07-13 18:27:16,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:27:16,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463346552] [2021-07-13 18:27:16,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:27:16,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:27:17,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1114 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-07-13 18:27:17,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:27:17,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463346552] [2021-07-13 18:27:17,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463346552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:17,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061714589] [2021-07-13 18:27:17,561 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 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 [2021-07-13 18:27:17,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 18:27:17,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:27:17,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:27:17,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:27:18,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1090 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-07-13 18:27:18,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061714589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:18,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:27:18,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-13 18:27:18,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112722990] [2021-07-13 18:27:18,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:27:18,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:27:18,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:27:18,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:27:18,287 INFO L87 Difference]: Start difference. First operand 126475 states and 338949 transitions. Second operand has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:19,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:27:19,297 INFO L93 Difference]: Finished difference Result 155910 states and 413159 transitions. [2021-07-13 18:27:19,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:27:19,298 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 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 [2021-07-13 18:27:19,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:27:19,932 INFO L225 Difference]: With dead ends: 155910 [2021-07-13 18:27:19,932 INFO L226 Difference]: Without dead ends: 155910 [2021-07-13 18:27:19,932 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 256.4ms TimeCoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 18:27:20,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155910 states. [2021-07-13 18:27:22,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155910 to 118595. [2021-07-13 18:27:22,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118595 states, 118593 states have (on average 2.6781934852815934) internal successors, (317615), 118594 states have internal predecessors, (317615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:23,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118595 states to 118595 states and 317615 transitions. [2021-07-13 18:27:23,431 INFO L78 Accepts]: Start accepts. Automaton has 118595 states and 317615 transitions. Word has length 442 [2021-07-13 18:27:23,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:27:23,431 INFO L482 AbstractCegarLoop]: Abstraction has 118595 states and 317615 transitions. [2021-07-13 18:27:23,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:23,432 INFO L276 IsEmpty]: Start isEmpty. Operand 118595 states and 317615 transitions. [2021-07-13 18:27:23,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-07-13 18:27:23,681 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:27:23,681 INFO L508 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] [2021-07-13 18:27:23,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-13 18:27:23,882 INFO L430 AbstractCegarLoop]: === Iteration 91 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:27:23,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:27:23,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1643165387, now seen corresponding path program 42 times [2021-07-13 18:27:23,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:27:23,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920473959] [2021-07-13 18:27:23,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:27:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:27:24,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1114 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-07-13 18:27:24,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:27:24,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920473959] [2021-07-13 18:27:24,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920473959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:24,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758348824] [2021-07-13 18:27:24,087 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 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 [2021-07-13 18:27:24,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 18:27:24,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:27:24,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:27:24,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:27:24,920 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:27:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1090 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-07-13 18:27:25,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758348824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:25,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:27:25,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-13 18:27:25,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112065640] [2021-07-13 18:27:25,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:27:25,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:27:25,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:27:25,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:27:25,325 INFO L87 Difference]: Start difference. First operand 118595 states and 317615 transitions. Second operand has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:26,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:27:26,415 INFO L93 Difference]: Finished difference Result 173295 states and 460882 transitions. [2021-07-13 18:27:26,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:27:26,415 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 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 [2021-07-13 18:27:26,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:27:26,863 INFO L225 Difference]: With dead ends: 173295 [2021-07-13 18:27:26,864 INFO L226 Difference]: Without dead ends: 173295 [2021-07-13 18:27:26,864 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 244.9ms TimeCoverageRelationStatistics Valid=314, Invalid=946, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 18:27:27,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173295 states. [2021-07-13 18:27:29,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173295 to 120755. [2021-07-13 18:27:29,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120755 states, 120753 states have (on average 2.679212938808974) internal successors, (323523), 120754 states have internal predecessors, (323523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:30,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120755 states to 120755 states and 323523 transitions. [2021-07-13 18:27:30,733 INFO L78 Accepts]: Start accepts. Automaton has 120755 states and 323523 transitions. Word has length 442 [2021-07-13 18:27:30,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:27:30,734 INFO L482 AbstractCegarLoop]: Abstraction has 120755 states and 323523 transitions. [2021-07-13 18:27:30,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:30,734 INFO L276 IsEmpty]: Start isEmpty. Operand 120755 states and 323523 transitions. [2021-07-13 18:27:30,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-07-13 18:27:30,969 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:27:30,969 INFO L508 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] [2021-07-13 18:27:31,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:27:31,173 INFO L430 AbstractCegarLoop]: === Iteration 92 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:27:31,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:27:31,173 INFO L82 PathProgramCache]: Analyzing trace with hash -904179745, now seen corresponding path program 43 times [2021-07-13 18:27:31,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:27:31,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326194867] [2021-07-13 18:27:31,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:27:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:27:31,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1114 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-07-13 18:27:31,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:27:31,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326194867] [2021-07-13 18:27:31,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326194867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:31,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101981959] [2021-07-13 18:27:31,341 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 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 [2021-07-13 18:27:31,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:27:31,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:27:31,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:27:32,084 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:27:32,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1090 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-07-13 18:27:32,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101981959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:32,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:27:32,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-13 18:27:32,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127441969] [2021-07-13 18:27:32,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:27:32,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:27:32,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:27:32,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:27:32,257 INFO L87 Difference]: Start difference. First operand 120755 states and 323523 transitions. Second operand has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:33,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:27:33,401 INFO L93 Difference]: Finished difference Result 167880 states and 446199 transitions. [2021-07-13 18:27:33,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 18:27:33,401 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 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 [2021-07-13 18:27:33,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:27:33,871 INFO L225 Difference]: With dead ends: 167880 [2021-07-13 18:27:33,871 INFO L226 Difference]: Without dead ends: 167880 [2021-07-13 18:27:33,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 236.3ms TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 18:27:34,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167880 states. [2021-07-13 18:27:36,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167880 to 121835. [2021-07-13 18:27:37,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121835 states, 121833 states have (on average 2.679709110011245) internal successors, (326477), 121834 states have internal predecessors, (326477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:37,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121835 states to 121835 states and 326477 transitions. [2021-07-13 18:27:37,425 INFO L78 Accepts]: Start accepts. Automaton has 121835 states and 326477 transitions. Word has length 442 [2021-07-13 18:27:37,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:27:37,425 INFO L482 AbstractCegarLoop]: Abstraction has 121835 states and 326477 transitions. [2021-07-13 18:27:37,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:37,426 INFO L276 IsEmpty]: Start isEmpty. Operand 121835 states and 326477 transitions. [2021-07-13 18:27:38,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-07-13 18:27:38,208 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:27:38,208 INFO L508 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] [2021-07-13 18:27:38,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:27:38,409 INFO L430 AbstractCegarLoop]: === Iteration 93 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:27:38,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:27:38,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1277430173, now seen corresponding path program 44 times [2021-07-13 18:27:38,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:27:38,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906998456] [2021-07-13 18:27:38,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:27:38,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:27:38,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1114 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-07-13 18:27:38,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:27:38,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906998456] [2021-07-13 18:27:38,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906998456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:38,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174441786] [2021-07-13 18:27:38,569 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 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 [2021-07-13 18:27:38,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:27:38,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:27:38,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:27:38,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:27:39,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1090 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-07-13 18:27:39,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174441786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:39,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:27:39,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-13 18:27:39,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168490744] [2021-07-13 18:27:39,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:27:39,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:27:39,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:27:39,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:27:39,201 INFO L87 Difference]: Start difference. First operand 121835 states and 326477 transitions. Second operand has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:40,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:27:40,844 INFO L93 Difference]: Finished difference Result 165670 states and 440456 transitions. [2021-07-13 18:27:40,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:27:40,845 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 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 [2021-07-13 18:27:40,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:27:41,281 INFO L225 Difference]: With dead ends: 165670 [2021-07-13 18:27:41,281 INFO L226 Difference]: Without dead ends: 165670 [2021-07-13 18:27:41,282 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 260.5ms TimeCoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 18:27:41,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165670 states. [2021-07-13 18:27:44,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165670 to 123655. [2021-07-13 18:27:44,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123655 states, 123653 states have (on average 2.680064373690893) internal successors, (331398), 123654 states have internal predecessors, (331398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:45,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123655 states to 123655 states and 331398 transitions. [2021-07-13 18:27:45,319 INFO L78 Accepts]: Start accepts. Automaton has 123655 states and 331398 transitions. Word has length 442 [2021-07-13 18:27:45,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:27:45,319 INFO L482 AbstractCegarLoop]: Abstraction has 123655 states and 331398 transitions. [2021-07-13 18:27:45,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:45,320 INFO L276 IsEmpty]: Start isEmpty. Operand 123655 states and 331398 transitions. [2021-07-13 18:27:45,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-07-13 18:27:45,563 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:27:45,564 INFO L508 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] [2021-07-13 18:27:45,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:27:45,764 INFO L430 AbstractCegarLoop]: === Iteration 94 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:27:45,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:27:45,765 INFO L82 PathProgramCache]: Analyzing trace with hash -538444531, now seen corresponding path program 45 times [2021-07-13 18:27:45,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:27:45,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412369525] [2021-07-13 18:27:45,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:27:45,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:27:46,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1114 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-07-13 18:27:46,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:27:46,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412369525] [2021-07-13 18:27:46,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412369525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:46,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978973455] [2021-07-13 18:27:46,411 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 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 [2021-07-13 18:27:46,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 18:27:46,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:27:46,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:27:46,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:27:47,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1090 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-07-13 18:27:47,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978973455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:47,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:27:47,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-13 18:27:47,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365063855] [2021-07-13 18:27:47,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:27:47,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:27:47,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:27:47,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:27:47,235 INFO L87 Difference]: Start difference. First operand 123655 states and 331398 transitions. Second operand has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:48,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:27:48,352 INFO L93 Difference]: Finished difference Result 194020 states and 517652 transitions. [2021-07-13 18:27:48,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:27:48,353 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 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 [2021-07-13 18:27:48,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:27:49,197 INFO L225 Difference]: With dead ends: 194020 [2021-07-13 18:27:49,197 INFO L226 Difference]: Without dead ends: 194020 [2021-07-13 18:27:49,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 230.9ms TimeCoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 18:27:49,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194020 states. [2021-07-13 18:27:52,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194020 to 127635. [2021-07-13 18:27:52,515 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) [2021-07-13 18:27:52,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127635 states to 127635 states and 342227 transitions. [2021-07-13 18:27:52,909 INFO L78 Accepts]: Start accepts. Automaton has 127635 states and 342227 transitions. Word has length 442 [2021-07-13 18:27:52,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:27:52,910 INFO L482 AbstractCegarLoop]: Abstraction has 127635 states and 342227 transitions. [2021-07-13 18:27:52,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:52,910 INFO L276 IsEmpty]: Start isEmpty. Operand 127635 states and 342227 transitions. [2021-07-13 18:27:53,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-07-13 18:27:53,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:27:53,665 INFO L508 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] [2021-07-13 18:27:53,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:27:53,866 INFO L430 AbstractCegarLoop]: === Iteration 95 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:27:53,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:27:53,866 INFO L82 PathProgramCache]: Analyzing trace with hash 682808991, now seen corresponding path program 46 times [2021-07-13 18:27:53,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:27:53,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447990471] [2021-07-13 18:27:53,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:27:53,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:27:54,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1114 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-07-13 18:27:54,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:27:54,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447990471] [2021-07-13 18:27:54,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447990471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:54,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574158761] [2021-07-13 18:27:54,062 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 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 [2021-07-13 18:27:54,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:27:54,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:27:54,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:27:54,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:27:54,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1090 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-07-13 18:27:54,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574158761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:54,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:27:54,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-13 18:27:54,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823250038] [2021-07-13 18:27:54,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:27:54,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:27:54,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:27:54,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:27:54,998 INFO L87 Difference]: Start difference. First operand 127635 states and 342227 transitions. Second operand has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:56,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:27:56,371 INFO L93 Difference]: Finished difference Result 166380 states and 442579 transitions. [2021-07-13 18:27:56,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 18:27:56,372 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 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 [2021-07-13 18:27:56,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:27:56,832 INFO L225 Difference]: With dead ends: 166380 [2021-07-13 18:27:56,832 INFO L226 Difference]: Without dead ends: 166380 [2021-07-13 18:27:56,832 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 249.5ms TimeCoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 18:27:57,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166380 states. [2021-07-13 18:27:59,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166380 to 130535. [2021-07-13 18:27:59,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130535 states, 130533 states have (on average 2.682095715259743) internal successors, (350102), 130534 states have internal predecessors, (350102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:00,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130535 states to 130535 states and 350102 transitions. [2021-07-13 18:28:00,324 INFO L78 Accepts]: Start accepts. Automaton has 130535 states and 350102 transitions. Word has length 442 [2021-07-13 18:28:00,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:28:00,325 INFO L482 AbstractCegarLoop]: Abstraction has 130535 states and 350102 transitions. [2021-07-13 18:28:00,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:00,325 INFO L276 IsEmpty]: Start isEmpty. Operand 130535 states and 350102 transitions. [2021-07-13 18:28:01,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-07-13 18:28:01,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:28:01,049 INFO L508 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] [2021-07-13 18:28:01,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-07-13 18:28:01,277 INFO L430 AbstractCegarLoop]: === Iteration 96 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:28:01,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:28:01,277 INFO L82 PathProgramCache]: Analyzing trace with hash -114365039, now seen corresponding path program 47 times [2021-07-13 18:28:01,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:28:01,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925769860] [2021-07-13 18:28:01,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:28:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:28:01,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:28:01,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925769860] [2021-07-13 18:28:01,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925769860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:01,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27425891] [2021-07-13 18:28:01,438 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 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 [2021-07-13 18:28:01,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 18:28:01,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:28:01,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:28:01,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:28:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:28:02,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27425891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:02,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:28:02,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-13 18:28:02,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229807765] [2021-07-13 18:28:02,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:28:02,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:28:02,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:28:02,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:28:02,238 INFO L87 Difference]: Start difference. First operand 130535 states and 350102 transitions. Second operand has 18 states, 18 states have (on average 21.88888888888889) internal successors, (394), 18 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:03,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:28:03,231 INFO L93 Difference]: Finished difference Result 153970 states and 408038 transitions. [2021-07-13 18:28:03,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 18:28:03,232 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.88888888888889) internal successors, (394), 18 states have internal predecessors, (394), 0 states have call successors, (0), 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 [2021-07-13 18:28:03,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:28:03,923 INFO L225 Difference]: With dead ends: 153970 [2021-07-13 18:28:03,924 INFO L226 Difference]: Without dead ends: 153970 [2021-07-13 18:28:03,924 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 213.4ms TimeCoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 18:28:04,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153970 states. [2021-07-13 18:28:06,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153970 to 122655. [2021-07-13 18:28:06,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122655 states, 122653 states have (on average 2.6804725526485287) internal successors, (328768), 122654 states have internal predecessors, (328768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:07,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122655 states to 122655 states and 328768 transitions. [2021-07-13 18:28:07,378 INFO L78 Accepts]: Start accepts. Automaton has 122655 states and 328768 transitions. Word has length 442 [2021-07-13 18:28:07,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:28:07,379 INFO L482 AbstractCegarLoop]: Abstraction has 122655 states and 328768 transitions. [2021-07-13 18:28:07,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.88888888888889) internal successors, (394), 18 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:07,379 INFO L276 IsEmpty]: Start isEmpty. Operand 122655 states and 328768 transitions. [2021-07-13 18:28:07,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-07-13 18:28:07,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:28:07,626 INFO L508 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] [2021-07-13 18:28:07,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:28:07,827 INFO L430 AbstractCegarLoop]: === Iteration 97 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:28:07,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:28:07,827 INFO L82 PathProgramCache]: Analyzing trace with hash 624620603, now seen corresponding path program 48 times [2021-07-13 18:28:07,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:28:07,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924149751] [2021-07-13 18:28:07,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:28:07,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:28:07,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:28:07,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924149751] [2021-07-13 18:28:07,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924149751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:07,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019266448] [2021-07-13 18:28:07,976 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 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 [2021-07-13 18:28:08,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 18:28:08,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:28:08,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:28:08,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:28:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:28:09,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019266448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:09,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:28:09,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-13 18:28:09,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393759525] [2021-07-13 18:28:09,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:28:09,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:28:09,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:28:09,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:28:09,246 INFO L87 Difference]: Start difference. First operand 122655 states and 328768 transitions. Second operand has 18 states, 18 states have (on average 21.88888888888889) internal successors, (394), 18 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:10,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:28:10,254 INFO L93 Difference]: Finished difference Result 174270 states and 463943 transitions. [2021-07-13 18:28:10,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 18:28:10,254 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.88888888888889) internal successors, (394), 18 states have internal predecessors, (394), 0 states have call successors, (0), 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 [2021-07-13 18:28:10,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:28:10,952 INFO L225 Difference]: With dead ends: 174270 [2021-07-13 18:28:10,953 INFO L226 Difference]: Without dead ends: 174270 [2021-07-13 18:28:10,953 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 219.9ms TimeCoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 18:28:11,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174270 states. [2021-07-13 18:28:14,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174270 to 126895. [2021-07-13 18:28:14,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126895 states, 126893 states have (on average 2.6814717911941557) internal successors, (340260), 126894 states have internal predecessors, (340260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:14,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126895 states to 126895 states and 340260 transitions. [2021-07-13 18:28:14,700 INFO L78 Accepts]: Start accepts. Automaton has 126895 states and 340260 transitions. Word has length 442 [2021-07-13 18:28:14,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:28:14,700 INFO L482 AbstractCegarLoop]: Abstraction has 126895 states and 340260 transitions. [2021-07-13 18:28:14,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.88888888888889) internal successors, (394), 18 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:14,700 INFO L276 IsEmpty]: Start isEmpty. Operand 126895 states and 340260 transitions. [2021-07-13 18:28:15,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-07-13 18:28:15,466 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:28:15,466 INFO L508 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] [2021-07-13 18:28:15,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-07-13 18:28:15,667 INFO L430 AbstractCegarLoop]: === Iteration 98 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:28:15,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:28:15,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1845874125, now seen corresponding path program 49 times [2021-07-13 18:28:15,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:28:15,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815070691] [2021-07-13 18:28:15,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:28:15,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:15,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:28:15,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:28:15,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815070691] [2021-07-13 18:28:15,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815070691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:15,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807280398] [2021-07-13 18:28:15,812 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 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 [2021-07-13 18:28:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:15,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:28:15,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:28:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:28:16,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807280398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:16,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:28:16,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-13 18:28:16,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449382137] [2021-07-13 18:28:16,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:28:16,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:28:16,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:28:16,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:28:16,452 INFO L87 Difference]: Start difference. First operand 126895 states and 340260 transitions. Second operand has 18 states, 18 states have (on average 21.88888888888889) internal successors, (394), 18 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:16,704 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-07-13 18:28:17,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:28:17,869 INFO L93 Difference]: Finished difference Result 177070 states and 471880 transitions. [2021-07-13 18:28:17,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 18:28:17,869 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.88888888888889) internal successors, (394), 18 states have internal predecessors, (394), 0 states have call successors, (0), 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 [2021-07-13 18:28:17,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:28:18,844 INFO L225 Difference]: With dead ends: 177070 [2021-07-13 18:28:18,844 INFO L226 Difference]: Without dead ends: 177070 [2021-07-13 18:28:18,844 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 401.7ms TimeCoverageRelationStatistics Valid=261, Invalid=861, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 18:28:19,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177070 states. [2021-07-13 18:28:22,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177070 to 128715. [2021-07-13 18:28:22,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128715 states, 128713 states have (on average 2.6817881643656816) internal successors, (345181), 128714 states have internal predecessors, (345181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:22,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128715 states to 128715 states and 345181 transitions. [2021-07-13 18:28:22,690 INFO L78 Accepts]: Start accepts. Automaton has 128715 states and 345181 transitions. Word has length 442 [2021-07-13 18:28:22,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:28:22,690 INFO L482 AbstractCegarLoop]: Abstraction has 128715 states and 345181 transitions. [2021-07-13 18:28:22,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.88888888888889) internal successors, (394), 18 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:22,690 INFO L276 IsEmpty]: Start isEmpty. Operand 128715 states and 345181 transitions. [2021-07-13 18:28:23,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-07-13 18:28:23,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:28:23,480 INFO L508 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] [2021-07-13 18:28:23,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:28:23,681 INFO L430 AbstractCegarLoop]: === Iteration 99 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:28:23,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:28:23,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1364630879, now seen corresponding path program 50 times [2021-07-13 18:28:23,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:28:23,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424559859] [2021-07-13 18:28:23,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:28:23,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:23,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:28:23,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:28:23,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424559859] [2021-07-13 18:28:23,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424559859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:23,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970080979] [2021-07-13 18:28:23,824 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 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 [2021-07-13 18:28:23,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:28:23,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:28:23,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:28:23,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:28:24,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:28:24,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970080979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:24,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:28:24,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-13 18:28:24,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445163349] [2021-07-13 18:28:24,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:28:24,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:28:24,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:28:24,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:28:24,458 INFO L87 Difference]: Start difference. First operand 128715 states and 345181 transitions. Second operand has 18 states, 18 states have (on average 21.88888888888889) internal successors, (394), 18 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:25,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:28:25,905 INFO L93 Difference]: Finished difference Result 182705 states and 485309 transitions. [2021-07-13 18:28:25,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 18:28:25,905 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.88888888888889) internal successors, (394), 18 states have internal predecessors, (394), 0 states have call successors, (0), 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 [2021-07-13 18:28:25,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:28:26,395 INFO L225 Difference]: With dead ends: 182705 [2021-07-13 18:28:26,396 INFO L226 Difference]: Without dead ends: 182705 [2021-07-13 18:28:26,396 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 420.7ms TimeCoverageRelationStatistics Valid=275, Invalid=915, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 18:28:26,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182705 states. [2021-07-13 18:28:29,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182705 to 143255. [2021-07-13 18:28:30,197 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) [2021-07-13 18:28:30,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143255 states to 143255 states and 384578 transitions. [2021-07-13 18:28:30,633 INFO L78 Accepts]: Start accepts. Automaton has 143255 states and 384578 transitions. Word has length 442 [2021-07-13 18:28:30,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:28:30,633 INFO L482 AbstractCegarLoop]: Abstraction has 143255 states and 384578 transitions. [2021-07-13 18:28:30,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.88888888888889) internal successors, (394), 18 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:30,633 INFO L276 IsEmpty]: Start isEmpty. Operand 143255 states and 384578 transitions. [2021-07-13 18:28:31,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:28:31,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:28:31,470 INFO L508 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] [2021-07-13 18:28:31,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:28:31,672 INFO L430 AbstractCegarLoop]: === Iteration 100 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:28:31,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:28:31,673 INFO L82 PathProgramCache]: Analyzing trace with hash 2033417846, now seen corresponding path program 51 times [2021-07-13 18:28:31,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:28:31,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620009891] [2021-07-13 18:28:31,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:28:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1379 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:28:31,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:28:31,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620009891] [2021-07-13 18:28:31,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620009891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:31,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468217797] [2021-07-13 18:28:31,866 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 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 [2021-07-13 18:28:32,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 18:28:32,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:28:32,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:28:32,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:28:33,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1355 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-07-13 18:28:33,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468217797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:33,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:28:33,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-13 18:28:33,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207808634] [2021-07-13 18:28:33,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:28:33,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:28:33,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:28:33,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:28:33,051 INFO L87 Difference]: Start difference. First operand 143255 states and 384578 transitions. Second operand has 21 states, 21 states have (on average 20.428571428571427) internal successors, (429), 21 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:34,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:28:34,236 INFO L93 Difference]: Finished difference Result 169355 states and 450223 transitions. [2021-07-13 18:28:34,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:28:34,237 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.428571428571427) internal successors, (429), 21 states have internal predecessors, (429), 0 states have call successors, (0), 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 [2021-07-13 18:28:34,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:28:34,685 INFO L225 Difference]: With dead ends: 169355 [2021-07-13 18:28:34,685 INFO L226 Difference]: Without dead ends: 169355 [2021-07-13 18:28:34,685 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 286.9ms TimeCoverageRelationStatistics Valid=454, Invalid=1186, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 18:28:35,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169355 states. [2021-07-13 18:28:37,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169355 to 143255. [2021-07-13 18:28:38,477 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) [2021-07-13 18:28:38,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143255 states to 143255 states and 384578 transitions. [2021-07-13 18:28:38,935 INFO L78 Accepts]: Start accepts. Automaton has 143255 states and 384578 transitions. Word has length 443 [2021-07-13 18:28:38,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:28:38,936 INFO L482 AbstractCegarLoop]: Abstraction has 143255 states and 384578 transitions. [2021-07-13 18:28:38,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.428571428571427) internal successors, (429), 21 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:38,936 INFO L276 IsEmpty]: Start isEmpty. Operand 143255 states and 384578 transitions. [2021-07-13 18:28:39,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:28:39,227 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:28:39,227 INFO L508 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] [2021-07-13 18:28:39,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-07-13 18:28:39,428 INFO L430 AbstractCegarLoop]: === Iteration 101 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:28:39,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:28:39,428 INFO L82 PathProgramCache]: Analyzing trace with hash 952383008, now seen corresponding path program 52 times [2021-07-13 18:28:39,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:28:39,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381494572] [2021-07-13 18:28:39,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:28:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:40,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1379 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:28:40,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:28:40,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381494572] [2021-07-13 18:28:40,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381494572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:40,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459576387] [2021-07-13 18:28:40,075 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 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 [2021-07-13 18:28:40,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:28:40,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:28:40,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:28:40,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:28:41,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1355 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-07-13 18:28:41,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459576387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:41,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:28:41,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-13 18:28:41,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62244572] [2021-07-13 18:28:41,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:28:41,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:28:41,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:28:41,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:28:41,002 INFO L87 Difference]: Start difference. First operand 143255 states and 384578 transitions. Second operand has 21 states, 21 states have (on average 20.428571428571427) internal successors, (429), 21 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:42,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:28:42,421 INFO L93 Difference]: Finished difference Result 186470 states and 496079 transitions. [2021-07-13 18:28:42,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:28:42,421 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.428571428571427) internal successors, (429), 21 states have internal predecessors, (429), 0 states have call successors, (0), 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 [2021-07-13 18:28:42,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:28:42,939 INFO L225 Difference]: With dead ends: 186470 [2021-07-13 18:28:42,939 INFO L226 Difference]: Without dead ends: 186470 [2021-07-13 18:28:42,940 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 282.3ms TimeCoverageRelationStatistics Valid=452, Invalid=1188, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 18:28:43,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186470 states. [2021-07-13 18:28:46,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186470 to 143255. [2021-07-13 18:28:46,429 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) [2021-07-13 18:28:47,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143255 states to 143255 states and 384578 transitions. [2021-07-13 18:28:47,379 INFO L78 Accepts]: Start accepts. Automaton has 143255 states and 384578 transitions. Word has length 443 [2021-07-13 18:28:47,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:28:47,380 INFO L482 AbstractCegarLoop]: Abstraction has 143255 states and 384578 transitions. [2021-07-13 18:28:47,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.428571428571427) internal successors, (429), 21 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:47,380 INFO L276 IsEmpty]: Start isEmpty. Operand 143255 states and 384578 transitions. [2021-07-13 18:28:47,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:28:47,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:28:47,667 INFO L508 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] [2021-07-13 18:28:47,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-13 18:28:47,867 INFO L430 AbstractCegarLoop]: === Iteration 102 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:28:47,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:28:47,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1596160330, now seen corresponding path program 53 times [2021-07-13 18:28:47,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:28:47,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173410019] [2021-07-13 18:28:47,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:28:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1379 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:28:48,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:28:48,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173410019] [2021-07-13 18:28:48,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173410019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:48,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70918712] [2021-07-13 18:28:48,069 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 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 [2021-07-13 18:28:48,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 18:28:48,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:28:48,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:28:48,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:28:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1355 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-07-13 18:28:49,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70918712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:49,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:28:49,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-13 18:28:49,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713752430] [2021-07-13 18:28:49,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:28:49,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:28:49,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:28:49,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:28:49,246 INFO L87 Difference]: Start difference. First operand 143255 states and 384578 transitions. Second operand has 21 states, 21 states have (on average 20.428571428571427) internal successors, (429), 21 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:50,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:28:50,398 INFO L93 Difference]: Finished difference Result 186350 states and 496201 transitions. [2021-07-13 18:28:50,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 18:28:50,398 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.428571428571427) internal successors, (429), 21 states have internal predecessors, (429), 0 states have call successors, (0), 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 [2021-07-13 18:28:50,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:28:51,184 INFO L225 Difference]: With dead ends: 186350 [2021-07-13 18:28:51,184 INFO L226 Difference]: Without dead ends: 186350 [2021-07-13 18:28:51,184 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 294.1ms TimeCoverageRelationStatistics Valid=463, Invalid=1259, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 18:28:51,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186350 states. [2021-07-13 18:28:54,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186350 to 146155. [2021-07-13 18:28:54,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146155 states, 146153 states have (on average 2.685220282854269) internal successors, (392453), 146154 states have internal predecessors, (392453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:55,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146155 states to 146155 states and 392453 transitions. [2021-07-13 18:28:55,653 INFO L78 Accepts]: Start accepts. Automaton has 146155 states and 392453 transitions. Word has length 443 [2021-07-13 18:28:55,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:28:55,661 INFO L482 AbstractCegarLoop]: Abstraction has 146155 states and 392453 transitions. [2021-07-13 18:28:55,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.428571428571427) internal successors, (429), 21 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:55,662 INFO L276 IsEmpty]: Start isEmpty. Operand 146155 states and 392453 transitions. [2021-07-13 18:28:56,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:28:56,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:28:56,225 INFO L508 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] [2021-07-13 18:28:56,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:28:56,441 INFO L430 AbstractCegarLoop]: === Iteration 103 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:28:56,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:28:56,442 INFO L82 PathProgramCache]: Analyzing trace with hash 354489824, now seen corresponding path program 54 times [2021-07-13 18:28:56,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:28:56,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574817153] [2021-07-13 18:28:56,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:28:56,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:56,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1379 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:28:56,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:28:56,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574817153] [2021-07-13 18:28:56,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574817153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:56,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000650885] [2021-07-13 18:28:56,786 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 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 [2021-07-13 18:28:57,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 18:28:57,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:28:57,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:28:57,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:28:58,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1355 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-07-13 18:28:58,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000650885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:58,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:28:58,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-13 18:28:58,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986377031] [2021-07-13 18:28:58,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:28:58,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:28:58,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:28:58,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:28:58,322 INFO L87 Difference]: Start difference. First operand 146155 states and 392453 transitions. Second operand has 21 states, 21 states have (on average 20.428571428571427) internal successors, (429), 21 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:59,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:28:59,727 INFO L93 Difference]: Finished difference Result 189015 states and 503986 transitions. [2021-07-13 18:28:59,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 18:28:59,728 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.428571428571427) internal successors, (429), 21 states have internal predecessors, (429), 0 states have call successors, (0), 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 [2021-07-13 18:28:59,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:29:00,223 INFO L225 Difference]: With dead ends: 189015 [2021-07-13 18:29:00,223 INFO L226 Difference]: Without dead ends: 189015 [2021-07-13 18:29:00,223 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 381.0ms TimeCoverageRelationStatistics Valid=474, Invalid=1332, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 18:29:00,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189015 states. [2021-07-13 18:29:03,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189015 to 147235. [2021-07-13 18:29:03,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147235 states, 147233 states have (on average 2.685586791004734) internal successors, (395407), 147234 states have internal predecessors, (395407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:04,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147235 states to 147235 states and 395407 transitions. [2021-07-13 18:29:04,354 INFO L78 Accepts]: Start accepts. Automaton has 147235 states and 395407 transitions. Word has length 443 [2021-07-13 18:29:04,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:29:04,354 INFO L482 AbstractCegarLoop]: Abstraction has 147235 states and 395407 transitions. [2021-07-13 18:29:04,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.428571428571427) internal successors, (429), 21 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:04,354 INFO L276 IsEmpty]: Start isEmpty. Operand 147235 states and 395407 transitions. [2021-07-13 18:29:05,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:29:05,186 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:29:05,186 INFO L508 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] [2021-07-13 18:29:05,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-13 18:29:05,387 INFO L430 AbstractCegarLoop]: === Iteration 104 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:29:05,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:29:05,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1159545098, now seen corresponding path program 55 times [2021-07-13 18:29:05,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:29:05,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807972388] [2021-07-13 18:29:05,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:29:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:29:05,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1379 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:29:05,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:29:05,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807972388] [2021-07-13 18:29:05,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807972388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:05,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787621170] [2021-07-13 18:29:05,581 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 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 [2021-07-13 18:29:05,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:29:05,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:29:05,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:29:06,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1355 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-07-13 18:29:06,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787621170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:06,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:29:06,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-13 18:29:06,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808704470] [2021-07-13 18:29:06,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:29:06,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:29:06,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:29:06,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:29:06,195 INFO L87 Difference]: Start difference. First operand 147235 states and 395407 transitions. Second operand has 21 states, 21 states have (on average 20.428571428571427) internal successors, (429), 21 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:07,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:29:07,648 INFO L93 Difference]: Finished difference Result 181355 states and 483263 transitions. [2021-07-13 18:29:07,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 18:29:07,649 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.428571428571427) internal successors, (429), 21 states have internal predecessors, (429), 0 states have call successors, (0), 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 [2021-07-13 18:29:07,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:29:08,110 INFO L225 Difference]: With dead ends: 181355 [2021-07-13 18:29:08,110 INFO L226 Difference]: Without dead ends: 181355 [2021-07-13 18:29:08,110 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 311.0ms TimeCoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 18:29:08,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181355 states. [2021-07-13 18:29:11,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181355 to 148315. [2021-07-13 18:29:11,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148315 states, 148313 states have (on average 2.6859479614059456) internal successors, (398361), 148314 states have internal predecessors, (398361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:12,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148315 states to 148315 states and 398361 transitions. [2021-07-13 18:29:12,302 INFO L78 Accepts]: Start accepts. Automaton has 148315 states and 398361 transitions. Word has length 443 [2021-07-13 18:29:12,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:29:12,302 INFO L482 AbstractCegarLoop]: Abstraction has 148315 states and 398361 transitions. [2021-07-13 18:29:12,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.428571428571427) internal successors, (429), 21 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:12,302 INFO L276 IsEmpty]: Start isEmpty. Operand 148315 states and 398361 transitions. [2021-07-13 18:29:12,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:29:12,606 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:29:12,606 INFO L508 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] [2021-07-13 18:29:12,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-13 18:29:12,807 INFO L430 AbstractCegarLoop]: === Iteration 105 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:29:12,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:29:12,807 INFO L82 PathProgramCache]: Analyzing trace with hash -420559456, now seen corresponding path program 56 times [2021-07-13 18:29:12,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:29:12,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744086243] [2021-07-13 18:29:12,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:29:12,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:29:13,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1379 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:29:13,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:29:13,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744086243] [2021-07-13 18:29:13,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744086243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:13,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502192071] [2021-07-13 18:29:13,484 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 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 [2021-07-13 18:29:13,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:29:13,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:29:13,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:29:13,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:29:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1355 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-07-13 18:29:14,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502192071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:14,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:29:14,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-13 18:29:14,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880092145] [2021-07-13 18:29:14,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:29:14,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:29:14,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:29:14,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:29:14,111 INFO L87 Difference]: Start difference. First operand 148315 states and 398361 transitions. Second operand has 21 states, 21 states have (on average 20.428571428571427) internal successors, (429), 21 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:15,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:29:15,266 INFO L93 Difference]: Finished difference Result 177735 states and 473719 transitions. [2021-07-13 18:29:15,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 18:29:15,267 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.428571428571427) internal successors, (429), 21 states have internal predecessors, (429), 0 states have call successors, (0), 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 [2021-07-13 18:29:15,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:29:16,037 INFO L225 Difference]: With dead ends: 177735 [2021-07-13 18:29:16,037 INFO L226 Difference]: Without dead ends: 177735 [2021-07-13 18:29:16,037 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 322.4ms TimeCoverageRelationStatistics Valid=496, Invalid=1484, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 18:29:16,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177735 states. [2021-07-13 18:29:19,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177735 to 148315. [2021-07-13 18:29:19,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148315 states, 148313 states have (on average 2.6859479614059456) internal successors, (398361), 148314 states have internal predecessors, (398361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:20,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148315 states to 148315 states and 398361 transitions. [2021-07-13 18:29:20,564 INFO L78 Accepts]: Start accepts. Automaton has 148315 states and 398361 transitions. Word has length 443 [2021-07-13 18:29:20,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:29:20,564 INFO L482 AbstractCegarLoop]: Abstraction has 148315 states and 398361 transitions. [2021-07-13 18:29:20,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.428571428571427) internal successors, (429), 21 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:20,564 INFO L276 IsEmpty]: Start isEmpty. Operand 148315 states and 398361 transitions. [2021-07-13 18:29:20,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:29:20,875 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:29:20,875 INFO L508 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] [2021-07-13 18:29:21,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-07-13 18:29:21,077 INFO L430 AbstractCegarLoop]: === Iteration 106 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:29:21,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:29:21,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1647303502, now seen corresponding path program 57 times [2021-07-13 18:29:21,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:29:21,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185203885] [2021-07-13 18:29:21,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:29:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:29:21,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:29:21,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:29:21,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185203885] [2021-07-13 18:29:21,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185203885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:21,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119644439] [2021-07-13 18:29:21,258 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 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 [2021-07-13 18:29:22,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 18:29:22,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:29:22,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:29:22,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:29:22,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:29:22,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119644439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:22,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:29:22,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:29:22,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683012697] [2021-07-13 18:29:22,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:29:22,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:29:22,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:29:22,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:29:22,581 INFO L87 Difference]: Start difference. First operand 148315 states and 398361 transitions. Second operand has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:23,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:29:23,709 INFO L93 Difference]: Finished difference Result 176030 states and 467809 transitions. [2021-07-13 18:29:23,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 18:29:23,710 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 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 [2021-07-13 18:29:23,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:29:24,446 INFO L225 Difference]: With dead ends: 176030 [2021-07-13 18:29:24,446 INFO L226 Difference]: Without dead ends: 176030 [2021-07-13 18:29:24,447 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 269.7ms TimeCoverageRelationStatistics Valid=389, Invalid=1093, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 18:29:24,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176030 states. [2021-07-13 18:29:27,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176030 to 140355. [2021-07-13 18:29:27,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140355 states, 140353 states have (on average 2.6839682799797653) internal successors, (376703), 140354 states have internal predecessors, (376703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:28,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140355 states to 140355 states and 376703 transitions. [2021-07-13 18:29:28,323 INFO L78 Accepts]: Start accepts. Automaton has 140355 states and 376703 transitions. Word has length 443 [2021-07-13 18:29:28,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:29:28,323 INFO L482 AbstractCegarLoop]: Abstraction has 140355 states and 376703 transitions. [2021-07-13 18:29:28,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:28,323 INFO L276 IsEmpty]: Start isEmpty. Operand 140355 states and 376703 transitions. [2021-07-13 18:29:29,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:29:29,265 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:29:29,265 INFO L508 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] [2021-07-13 18:29:29,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:29:29,491 INFO L430 AbstractCegarLoop]: === Iteration 107 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:29:29,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:29:29,491 INFO L82 PathProgramCache]: Analyzing trace with hash 99120456, now seen corresponding path program 58 times [2021-07-13 18:29:29,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:29:29,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199677942] [2021-07-13 18:29:29,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:29:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:29:29,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:29:29,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:29:29,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199677942] [2021-07-13 18:29:29,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199677942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:29,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367889201] [2021-07-13 18:29:29,725 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 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 [2021-07-13 18:29:30,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:29:30,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:29:30,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:29:30,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:29:31,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:29:31,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367889201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:31,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:29:31,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:29:31,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082439491] [2021-07-13 18:29:31,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:29:31,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:29:31,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:29:31,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:29:31,299 INFO L87 Difference]: Start difference. First operand 140355 states and 376703 transitions. Second operand has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:32,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:29:32,963 INFO L93 Difference]: Finished difference Result 205425 states and 546987 transitions. [2021-07-13 18:29:32,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 18:29:32,964 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 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 [2021-07-13 18:29:32,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:29:33,544 INFO L225 Difference]: With dead ends: 205425 [2021-07-13 18:29:33,545 INFO L226 Difference]: Without dead ends: 205425 [2021-07-13 18:29:33,545 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 312.8ms TimeCoverageRelationStatistics Valid=387, Invalid=1095, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 18:29:34,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205425 states. [2021-07-13 18:29:36,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205425 to 142175. [2021-07-13 18:29:37,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142175 states, 142173 states have (on average 2.6842227427148613) internal successors, (381624), 142174 states have internal predecessors, (381624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:38,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142175 states to 142175 states and 381624 transitions. [2021-07-13 18:29:38,037 INFO L78 Accepts]: Start accepts. Automaton has 142175 states and 381624 transitions. Word has length 443 [2021-07-13 18:29:38,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:29:38,037 INFO L482 AbstractCegarLoop]: Abstraction has 142175 states and 381624 transitions. [2021-07-13 18:29:38,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:38,038 INFO L276 IsEmpty]: Start isEmpty. Operand 142175 states and 381624 transitions. [2021-07-13 18:29:38,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:29:38,335 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:29:38,335 INFO L508 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] [2021-07-13 18:29:38,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-07-13 18:29:38,536 INFO L430 AbstractCegarLoop]: === Iteration 108 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:29:38,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:29:38,536 INFO L82 PathProgramCache]: Analyzing trace with hash 2049770610, now seen corresponding path program 59 times [2021-07-13 18:29:38,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:29:38,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663174229] [2021-07-13 18:29:38,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:29:38,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:29:39,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:29:39,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:29:39,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663174229] [2021-07-13 18:29:39,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663174229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:39,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821326926] [2021-07-13 18:29:39,175 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 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 [2021-07-13 18:29:39,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 18:29:39,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:29:39,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:29:39,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:29:39,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:29:39,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821326926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:39,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:29:39,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:29:39,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819281209] [2021-07-13 18:29:39,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:29:39,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:29:39,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:29:39,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:29:39,954 INFO L87 Difference]: Start difference. First operand 142175 states and 381624 transitions. Second operand has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:41,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:29:41,534 INFO L93 Difference]: Finished difference Result 202245 states and 539535 transitions. [2021-07-13 18:29:41,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 18:29:41,534 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 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 [2021-07-13 18:29:41,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:29:42,162 INFO L225 Difference]: With dead ends: 202245 [2021-07-13 18:29:42,163 INFO L226 Difference]: Without dead ends: 202245 [2021-07-13 18:29:42,163 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 277.0ms TimeCoverageRelationStatistics Valid=397, Invalid=1163, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 18:29:42,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202245 states. [2021-07-13 18:29:45,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202245 to 140355. [2021-07-13 18:29:45,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140355 states, 140353 states have (on average 2.6839682799797653) internal successors, (376703), 140354 states have internal predecessors, (376703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:46,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140355 states to 140355 states and 376703 transitions. [2021-07-13 18:29:46,579 INFO L78 Accepts]: Start accepts. Automaton has 140355 states and 376703 transitions. Word has length 443 [2021-07-13 18:29:46,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:29:46,580 INFO L482 AbstractCegarLoop]: Abstraction has 140355 states and 376703 transitions. [2021-07-13 18:29:46,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:46,580 INFO L276 IsEmpty]: Start isEmpty. Operand 140355 states and 376703 transitions. [2021-07-13 18:29:46,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:29:46,871 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:29:46,871 INFO L508 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] [2021-07-13 18:29:47,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-07-13 18:29:47,072 INFO L430 AbstractCegarLoop]: === Iteration 109 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:29:47,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:29:47,072 INFO L82 PathProgramCache]: Analyzing trace with hash 535735688, now seen corresponding path program 60 times [2021-07-13 18:29:47,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:29:47,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812992473] [2021-07-13 18:29:47,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:29:47,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:29:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:29:47,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:29:47,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812992473] [2021-07-13 18:29:47,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812992473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:47,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106899167] [2021-07-13 18:29:47,250 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 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 [2021-07-13 18:29:48,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 18:29:48,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:29:48,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:29:48,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:29:48,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:29:48,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106899167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:48,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:29:48,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:29:48,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125327228] [2021-07-13 18:29:48,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:29:48,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:29:48,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:29:48,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:29:48,648 INFO L87 Difference]: Start difference. First operand 140355 states and 376703 transitions. Second operand has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:49,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:29:49,856 INFO L93 Difference]: Finished difference Result 192350 states and 512463 transitions. [2021-07-13 18:29:49,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 18:29:49,857 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 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 [2021-07-13 18:29:49,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:29:50,703 INFO L225 Difference]: With dead ends: 192350 [2021-07-13 18:29:50,704 INFO L226 Difference]: Without dead ends: 192350 [2021-07-13 18:29:50,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 290.4ms TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 18:29:51,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192350 states. [2021-07-13 18:29:53,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192350 to 141435. [2021-07-13 18:29:54,222 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) [2021-07-13 18:29:54,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141435 states to 141435 states and 379657 transitions. [2021-07-13 18:29:54,674 INFO L78 Accepts]: Start accepts. Automaton has 141435 states and 379657 transitions. Word has length 443 [2021-07-13 18:29:54,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:29:54,675 INFO L482 AbstractCegarLoop]: Abstraction has 141435 states and 379657 transitions. [2021-07-13 18:29:54,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:54,675 INFO L276 IsEmpty]: Start isEmpty. Operand 141435 states and 379657 transitions. [2021-07-13 18:29:55,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:29:55,492 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:29:55,492 INFO L508 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] [2021-07-13 18:29:55,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:29:55,693 INFO L430 AbstractCegarLoop]: === Iteration 110 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:29:55,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:29:55,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1274721330, now seen corresponding path program 61 times [2021-07-13 18:29:55,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:29:55,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203555571] [2021-07-13 18:29:55,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:29:55,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:29:55,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:29:55,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:29:55,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203555571] [2021-07-13 18:29:55,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203555571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:55,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500763561] [2021-07-13 18:29:55,880 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 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 [2021-07-13 18:29:56,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:29:56,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:29:56,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:29:56,656 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:29:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:29:56,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500763561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:56,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:29:56,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:29:56,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718258118] [2021-07-13 18:29:56,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:29:56,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:29:56,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:29:56,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:29:56,778 INFO L87 Difference]: Start difference. First operand 141435 states and 379657 transitions. Second operand has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:58,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:29:58,073 INFO L93 Difference]: Finished difference Result 184655 states and 491590 transitions. [2021-07-13 18:29:58,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:29:58,074 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 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 [2021-07-13 18:29:58,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:29:58,587 INFO L225 Difference]: With dead ends: 184655 [2021-07-13 18:29:58,588 INFO L226 Difference]: Without dead ends: 184655 [2021-07-13 18:29:58,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 298.8ms TimeCoverageRelationStatistics Valid=417, Invalid=1305, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 18:29:59,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184655 states. [2021-07-13 18:30:02,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184655 to 139275. [2021-07-13 18:30:02,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139275 states, 139273 states have (on average 2.683571115722358) internal successors, (373749), 139274 states have internal predecessors, (373749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:02,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139275 states to 139275 states and 373749 transitions. [2021-07-13 18:30:02,761 INFO L78 Accepts]: Start accepts. Automaton has 139275 states and 373749 transitions. Word has length 443 [2021-07-13 18:30:02,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:30:02,761 INFO L482 AbstractCegarLoop]: Abstraction has 139275 states and 373749 transitions. [2021-07-13 18:30:02,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:02,761 INFO L276 IsEmpty]: Start isEmpty. Operand 139275 states and 373749 transitions. [2021-07-13 18:30:03,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:30:03,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:30:03,626 INFO L508 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] [2021-07-13 18:30:03,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:30:03,845 INFO L430 AbstractCegarLoop]: === Iteration 111 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:30:03,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:30:03,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1934518282, now seen corresponding path program 62 times [2021-07-13 18:30:03,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:30:03,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729403189] [2021-07-13 18:30:03,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:30:03,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:30:04,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:30:04,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:30:04,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729403189] [2021-07-13 18:30:04,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729403189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:04,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431875013] [2021-07-13 18:30:04,076 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 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 [2021-07-13 18:30:04,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:30:04,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:30:04,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:30:04,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:30:05,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:30:05,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431875013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:05,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:30:05,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:30:05,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428910383] [2021-07-13 18:30:05,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:30:05,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:30:05,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:30:05,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:30:05,021 INFO L87 Difference]: Start difference. First operand 139275 states and 373749 transitions. Second operand has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:06,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:30:06,441 INFO L93 Difference]: Finished difference Result 176600 states and 468957 transitions. [2021-07-13 18:30:06,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 18:30:06,442 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 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 [2021-07-13 18:30:06,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:30:06,930 INFO L225 Difference]: With dead ends: 176600 [2021-07-13 18:30:06,930 INFO L226 Difference]: Without dead ends: 176600 [2021-07-13 18:30:06,930 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 326.9ms TimeCoverageRelationStatistics Valid=400, Invalid=1160, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 18:30:07,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176600 states. [2021-07-13 18:30:10,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176600 to 136635. [2021-07-13 18:30:10,485 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) [2021-07-13 18:30:11,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136635 states to 136635 states and 366537 transitions. [2021-07-13 18:30:11,364 INFO L78 Accepts]: Start accepts. Automaton has 136635 states and 366537 transitions. Word has length 443 [2021-07-13 18:30:11,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:30:11,365 INFO L482 AbstractCegarLoop]: Abstraction has 136635 states and 366537 transitions. [2021-07-13 18:30:11,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:11,365 INFO L276 IsEmpty]: Start isEmpty. Operand 136635 states and 366537 transitions. [2021-07-13 18:30:11,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:30:11,663 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:30:11,664 INFO L508 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] [2021-07-13 18:30:11,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:30:11,864 INFO L430 AbstractCegarLoop]: === Iteration 112 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:30:11,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:30:11,865 INFO L82 PathProgramCache]: Analyzing trace with hash 16131872, now seen corresponding path program 63 times [2021-07-13 18:30:11,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:30:11,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839834115] [2021-07-13 18:30:11,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:30:11,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:30:12,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:30:12,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:30:12,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839834115] [2021-07-13 18:30:12,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839834115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:12,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589688782] [2021-07-13 18:30:12,054 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 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 [2021-07-13 18:30:13,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 18:30:13,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:30:13,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:30:13,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:30:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:30:13,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589688782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:13,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:30:13,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:30:13,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282338498] [2021-07-13 18:30:13,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:30:13,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:30:13,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:30:13,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:30:13,555 INFO L87 Difference]: Start difference. First operand 136635 states and 366537 transitions. Second operand has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:15,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:30:15,501 INFO L93 Difference]: Finished difference Result 235210 states and 628376 transitions. [2021-07-13 18:30:15,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 18:30:15,501 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 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 [2021-07-13 18:30:15,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:30:16,316 INFO L225 Difference]: With dead ends: 235210 [2021-07-13 18:30:16,317 INFO L226 Difference]: Without dead ends: 235210 [2021-07-13 18:30:16,317 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 296.0ms TimeCoverageRelationStatistics Valid=398, Invalid=1162, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 18:30:17,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235210 states. [2021-07-13 18:30:20,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235210 to 144255. [2021-07-13 18:30:20,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144255 states, 144253 states have (on average 2.6842284042619564) internal successors, (387208), 144254 states have internal predecessors, (387208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:21,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144255 states to 144255 states and 387208 transitions. [2021-07-13 18:30:21,122 INFO L78 Accepts]: Start accepts. Automaton has 144255 states and 387208 transitions. Word has length 443 [2021-07-13 18:30:21,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:30:21,122 INFO L482 AbstractCegarLoop]: Abstraction has 144255 states and 387208 transitions. [2021-07-13 18:30:21,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:21,633 INFO L276 IsEmpty]: Start isEmpty. Operand 144255 states and 387208 transitions. [2021-07-13 18:30:21,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:30:21,994 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:30:21,994 INFO L508 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] [2021-07-13 18:30:22,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:30:22,209 INFO L430 AbstractCegarLoop]: === Iteration 113 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:30:22,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:30:22,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1497903050, now seen corresponding path program 64 times [2021-07-13 18:30:22,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:30:22,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845788376] [2021-07-13 18:30:22,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:30:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:30:22,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:30:22,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:30:22,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845788376] [2021-07-13 18:30:22,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845788376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:22,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310930801] [2021-07-13 18:30:22,392 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 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 [2021-07-13 18:30:22,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:30:22,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:30:22,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:30:22,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:30:23,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:30:23,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310930801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:23,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:30:23,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:30:23,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426415149] [2021-07-13 18:30:23,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:30:23,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:30:23,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:30:23,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:30:23,611 INFO L87 Difference]: Start difference. First operand 144255 states and 387208 transitions. Second operand has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:25,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:30:25,096 INFO L93 Difference]: Finished difference Result 229135 states and 611975 transitions. [2021-07-13 18:30:25,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 18:30:25,097 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 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 [2021-07-13 18:30:25,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:30:26,122 INFO L225 Difference]: With dead ends: 229135 [2021-07-13 18:30:26,123 INFO L226 Difference]: Without dead ends: 229135 [2021-07-13 18:30:26,123 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 294.8ms TimeCoverageRelationStatistics Valid=408, Invalid=1232, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 18:30:26,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229135 states. [2021-07-13 18:30:29,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229135 to 149315. [2021-07-13 18:30:29,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149315 states, 149313 states have (on average 2.685573258858907) internal successors, (400991), 149314 states have internal predecessors, (400991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:30,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149315 states to 149315 states and 400991 transitions. [2021-07-13 18:30:30,925 INFO L78 Accepts]: Start accepts. Automaton has 149315 states and 400991 transitions. Word has length 443 [2021-07-13 18:30:30,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:30:30,926 INFO L482 AbstractCegarLoop]: Abstraction has 149315 states and 400991 transitions. [2021-07-13 18:30:30,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:30,926 INFO L276 IsEmpty]: Start isEmpty. Operand 149315 states and 400991 transitions. [2021-07-13 18:30:31,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:30:31,240 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:30:31,240 INFO L508 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] [2021-07-13 18:30:31,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-13 18:30:31,441 INFO L430 AbstractCegarLoop]: === Iteration 114 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:30:31,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:30:31,441 INFO L82 PathProgramCache]: Analyzing trace with hash -758917408, now seen corresponding path program 65 times [2021-07-13 18:30:31,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:30:31,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816204533] [2021-07-13 18:30:31,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:30:31,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:30:32,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:30:32,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:30:32,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816204533] [2021-07-13 18:30:32,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816204533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:32,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372106976] [2021-07-13 18:30:32,101 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 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 [2021-07-13 18:30:32,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 18:30:32,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:30:32,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:30:32,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:30:32,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:30:32,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372106976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:32,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:30:32,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:30:32,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248478410] [2021-07-13 18:30:32,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:30:32,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:30:32,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:30:32,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:30:32,957 INFO L87 Difference]: Start difference. First operand 149315 states and 400991 transitions. Second operand has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:34,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:30:34,614 INFO L93 Difference]: Finished difference Result 212365 states and 566239 transitions. [2021-07-13 18:30:34,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:30:34,615 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 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 [2021-07-13 18:30:34,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:30:35,264 INFO L225 Difference]: With dead ends: 212365 [2021-07-13 18:30:35,264 INFO L226 Difference]: Without dead ends: 212365 [2021-07-13 18:30:35,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 302.2ms TimeCoverageRelationStatistics Valid=418, Invalid=1304, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 18:30:35,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212365 states. [2021-07-13 18:30:39,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212365 to 148235. [2021-07-13 18:30:39,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148235 states, 148233 states have (on average 2.6852117949444456) internal successors, (398037), 148234 states have internal predecessors, (398037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:40,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148235 states to 148235 states and 398037 transitions. [2021-07-13 18:30:40,323 INFO L78 Accepts]: Start accepts. Automaton has 148235 states and 398037 transitions. Word has length 443 [2021-07-13 18:30:40,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:30:40,324 INFO L482 AbstractCegarLoop]: Abstraction has 148235 states and 398037 transitions. [2021-07-13 18:30:40,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:40,324 INFO L276 IsEmpty]: Start isEmpty. Operand 148235 states and 398037 transitions. [2021-07-13 18:30:40,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:30:40,721 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:30:40,721 INFO L508 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] [2021-07-13 18:30:40,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-13 18:30:40,937 INFO L430 AbstractCegarLoop]: === Iteration 115 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:30:40,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:30:40,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1411283762, now seen corresponding path program 66 times [2021-07-13 18:30:40,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:30:40,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225630962] [2021-07-13 18:30:40,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:30:40,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:30:41,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:30:41,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:30:41,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225630962] [2021-07-13 18:30:41,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225630962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:41,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510082290] [2021-07-13 18:30:41,184 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 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 [2021-07-13 18:30:42,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 18:30:42,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:30:42,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:30:42,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:30:42,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:30:42,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510082290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:42,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:30:42,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:30:42,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831847203] [2021-07-13 18:30:42,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:30:42,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:30:42,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:30:42,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:30:42,714 INFO L87 Difference]: Start difference. First operand 148235 states and 398037 transitions. Second operand has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:44,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:30:44,098 INFO L93 Difference]: Finished difference Result 185135 states and 493106 transitions. [2021-07-13 18:30:44,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 18:30:44,098 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 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 [2021-07-13 18:30:44,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:30:44,946 INFO L225 Difference]: With dead ends: 185135 [2021-07-13 18:30:44,946 INFO L226 Difference]: Without dead ends: 185135 [2021-07-13 18:30:44,946 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 337.9ms TimeCoverageRelationStatistics Valid=411, Invalid=1229, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 18:30:45,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185135 states. [2021-07-13 18:30:48,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185135 to 145595. [2021-07-13 18:30:48,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145595 states, 145593 states have (on average 2.684366693453669) internal successors, (390825), 145594 states have internal predecessors, (390825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:49,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145595 states to 145595 states and 390825 transitions. [2021-07-13 18:30:49,533 INFO L78 Accepts]: Start accepts. Automaton has 145595 states and 390825 transitions. Word has length 443 [2021-07-13 18:30:49,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:30:49,534 INFO L482 AbstractCegarLoop]: Abstraction has 145595 states and 390825 transitions. [2021-07-13 18:30:49,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:49,534 INFO L276 IsEmpty]: Start isEmpty. Operand 145595 states and 390825 transitions. [2021-07-13 18:30:49,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:30:49,842 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:30:49,843 INFO L508 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] [2021-07-13 18:30:50,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-13 18:30:50,043 INFO L430 AbstractCegarLoop]: === Iteration 116 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:30:50,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:30:50,044 INFO L82 PathProgramCache]: Analyzing trace with hash -102751160, now seen corresponding path program 67 times [2021-07-13 18:30:50,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:30:50,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803899647] [2021-07-13 18:30:50,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:30:50,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:30:50,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:30:50,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:30:50,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803899647] [2021-07-13 18:30:50,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803899647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:50,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281070479] [2021-07-13 18:30:50,221 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 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 [2021-07-13 18:30:50,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:30:50,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:30:50,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:30:51,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:30:51,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281070479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:51,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:30:51,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:30:51,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510005964] [2021-07-13 18:30:51,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:30:51,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:30:51,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:30:51,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:30:51,233 INFO L87 Difference]: Start difference. First operand 145595 states and 390825 transitions. Second operand has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:53,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:30:53,191 INFO L93 Difference]: Finished difference Result 253480 states and 678178 transitions. [2021-07-13 18:30:53,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 18:30:53,191 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 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 [2021-07-13 18:30:53,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:30:54,070 INFO L225 Difference]: With dead ends: 253480 [2021-07-13 18:30:54,070 INFO L226 Difference]: Without dead ends: 253480 [2021-07-13 18:30:54,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 304.4ms TimeCoverageRelationStatistics Valid=409, Invalid=1231, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 18:30:54,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253480 states. [2021-07-13 18:30:58,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253480 to 152475. [2021-07-13 18:30:58,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152475 states, 152473 states have (on average 2.6859116040216957) internal successors, (409529), 152474 states have internal predecessors, (409529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:59,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152475 states to 152475 states and 409529 transitions. [2021-07-13 18:30:59,484 INFO L78 Accepts]: Start accepts. Automaton has 152475 states and 409529 transitions. Word has length 443 [2021-07-13 18:30:59,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:30:59,484 INFO L482 AbstractCegarLoop]: Abstraction has 152475 states and 409529 transitions. [2021-07-13 18:30:59,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:59,485 INFO L276 IsEmpty]: Start isEmpty. Operand 152475 states and 409529 transitions. [2021-07-13 18:30:59,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:30:59,809 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:30:59,809 INFO L508 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] [2021-07-13 18:31:00,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:31:00,010 INFO L430 AbstractCegarLoop]: === Iteration 117 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:31:00,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:31:00,011 INFO L82 PathProgramCache]: Analyzing trace with hash 636234482, now seen corresponding path program 68 times [2021-07-13 18:31:00,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:31:00,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112607802] [2021-07-13 18:31:00,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:31:00,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:31:00,597 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:31:00,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:31:00,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:31:00,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112607802] [2021-07-13 18:31:00,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112607802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:00,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611707586] [2021-07-13 18:31:00,628 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 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 [2021-07-13 18:31:00,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:31:00,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:31:00,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:31:00,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:31:01,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:31:01,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611707586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:01,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:31:01,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:31:01,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434386566] [2021-07-13 18:31:01,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:31:01,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:31:01,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:31:01,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:31:01,274 INFO L87 Difference]: Start difference. First operand 152475 states and 409529 transitions. Second operand has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:03,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:31:03,059 INFO L93 Difference]: Finished difference Result 235170 states and 628573 transitions. [2021-07-13 18:31:03,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:31:03,060 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 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 [2021-07-13 18:31:03,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:31:03,829 INFO L225 Difference]: With dead ends: 235170 [2021-07-13 18:31:03,829 INFO L226 Difference]: Without dead ends: 235170 [2021-07-13 18:31:03,829 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 844.6ms TimeCoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 18:31:04,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235170 states. [2021-07-13 18:31:07,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235170 to 155375. [2021-07-13 18:31:08,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155375 states, 155373 states have (on average 2.6864641861842147) internal successors, (417404), 155374 states have internal predecessors, (417404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:09,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155375 states to 155375 states and 417404 transitions. [2021-07-13 18:31:09,295 INFO L78 Accepts]: Start accepts. Automaton has 155375 states and 417404 transitions. Word has length 443 [2021-07-13 18:31:09,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:31:09,295 INFO L482 AbstractCegarLoop]: Abstraction has 155375 states and 417404 transitions. [2021-07-13 18:31:09,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:09,295 INFO L276 IsEmpty]: Start isEmpty. Operand 155375 states and 417404 transitions. [2021-07-13 18:31:09,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:31:09,623 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:31:09,624 INFO L508 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] [2021-07-13 18:31:09,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-07-13 18:31:09,833 INFO L430 AbstractCegarLoop]: === Iteration 118 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:31:09,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:31:09,834 INFO L82 PathProgramCache]: Analyzing trace with hash 262984054, now seen corresponding path program 69 times [2021-07-13 18:31:09,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:31:09,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301138189] [2021-07-13 18:31:09,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:31:09,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:31:10,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:31:10,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:31:10,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301138189] [2021-07-13 18:31:10,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301138189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:10,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100819173] [2021-07-13 18:31:10,458 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 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 [2021-07-13 18:31:10,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 18:31:10,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:31:10,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:31:10,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:31:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:31:11,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100819173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:11,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:31:11,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:31:11,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012115906] [2021-07-13 18:31:11,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:31:11,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:31:11,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:31:11,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:31:11,410 INFO L87 Difference]: Start difference. First operand 155375 states and 417404 transitions. Second operand has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:12,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:31:12,814 INFO L93 Difference]: Finished difference Result 190150 states and 506842 transitions. [2021-07-13 18:31:12,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:31:12,815 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 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 [2021-07-13 18:31:12,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:31:13,824 INFO L225 Difference]: With dead ends: 190150 [2021-07-13 18:31:13,825 INFO L226 Difference]: Without dead ends: 190150 [2021-07-13 18:31:13,825 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 725.1ms TimeCoverageRelationStatistics Valid=422, Invalid=1300, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 18:31:14,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190150 states. [2021-07-13 18:31:17,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190150 to 157195. [2021-07-13 18:31:18,026 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) [2021-07-13 18:31:18,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157195 states to 157195 states and 422325 transitions. [2021-07-13 18:31:18,622 INFO L78 Accepts]: Start accepts. Automaton has 157195 states and 422325 transitions. Word has length 443 [2021-07-13 18:31:18,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:31:18,622 INFO L482 AbstractCegarLoop]: Abstraction has 157195 states and 422325 transitions. [2021-07-13 18:31:18,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:18,622 INFO L276 IsEmpty]: Start isEmpty. Operand 157195 states and 422325 transitions. [2021-07-13 18:31:19,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:31:19,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:31:19,473 INFO L508 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] [2021-07-13 18:31:19,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:31:19,674 INFO L430 AbstractCegarLoop]: === Iteration 119 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:31:19,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:31:19,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1001969696, now seen corresponding path program 70 times [2021-07-13 18:31:19,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:31:19,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412928618] [2021-07-13 18:31:19,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:31:19,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:31:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:31:19,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:31:19,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412928618] [2021-07-13 18:31:19,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412928618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:19,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416943713] [2021-07-13 18:31:19,851 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 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 [2021-07-13 18:31:20,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:31:20,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:31:20,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:31:20,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:31:20,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:31:20,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416943713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:20,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:31:20,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:31:20,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393342198] [2021-07-13 18:31:20,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:31:20,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:31:20,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:31:20,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:31:20,918 INFO L87 Difference]: Start difference. First operand 157195 states and 422325 transitions. Second operand has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:22,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:31:22,838 INFO L93 Difference]: Finished difference Result 247440 states and 661831 transitions. [2021-07-13 18:31:22,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:31:22,838 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 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 [2021-07-13 18:31:22,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:31:23,984 INFO L225 Difference]: With dead ends: 247440 [2021-07-13 18:31:23,984 INFO L226 Difference]: Without dead ends: 247440 [2021-07-13 18:31:23,985 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 298.3ms TimeCoverageRelationStatistics Valid=420, Invalid=1302, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 18:31:24,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247440 states. [2021-07-13 18:31:28,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247440 to 161175. [2021-07-13 18:31:28,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161175 states, 161173 states have (on average 2.687509694551817) internal successors, (433154), 161174 states have internal predecessors, (433154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:29,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161175 states to 161175 states and 433154 transitions. [2021-07-13 18:31:29,642 INFO L78 Accepts]: Start accepts. Automaton has 161175 states and 433154 transitions. Word has length 443 [2021-07-13 18:31:29,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:31:29,643 INFO L482 AbstractCegarLoop]: Abstraction has 161175 states and 433154 transitions. [2021-07-13 18:31:29,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:29,643 INFO L276 IsEmpty]: Start isEmpty. Operand 161175 states and 433154 transitions. [2021-07-13 18:31:29,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:31:29,966 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:31:29,967 INFO L508 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] [2021-07-13 18:31:30,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-07-13 18:31:30,167 INFO L430 AbstractCegarLoop]: === Iteration 120 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:31:30,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:31:30,168 INFO L82 PathProgramCache]: Analyzing trace with hash -2071744078, now seen corresponding path program 71 times [2021-07-13 18:31:30,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:31:30,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380685173] [2021-07-13 18:31:30,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:31:30,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:31:30,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:31:30,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:31:30,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380685173] [2021-07-13 18:31:30,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380685173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:30,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374499452] [2021-07-13 18:31:30,345 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 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 [2021-07-13 18:31:30,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 18:31:30,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:31:30,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:31:30,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:31:31,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:31:31,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374499452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:31,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:31:31,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:31:31,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067407580] [2021-07-13 18:31:31,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:31:31,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:31:31,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:31:31,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:31:31,416 INFO L87 Difference]: Start difference. First operand 161175 states and 433154 transitions. Second operand has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:32,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:31:32,685 INFO L93 Difference]: Finished difference Result 191895 states and 511908 transitions. [2021-07-13 18:31:32,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 18:31:32,686 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 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 [2021-07-13 18:31:32,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:31:33,527 INFO L225 Difference]: With dead ends: 191895 [2021-07-13 18:31:33,528 INFO L226 Difference]: Without dead ends: 191895 [2021-07-13 18:31:33,528 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 301.9ms TimeCoverageRelationStatistics Valid=433, Invalid=1373, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 18:31:33,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191895 states. [2021-07-13 18:31:37,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191895 to 162995. [2021-07-13 18:31:37,745 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) [2021-07-13 18:31:38,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162995 states to 162995 states and 438075 transitions. [2021-07-13 18:31:38,261 INFO L78 Accepts]: Start accepts. Automaton has 162995 states and 438075 transitions. Word has length 443 [2021-07-13 18:31:38,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:31:38,262 INFO L482 AbstractCegarLoop]: Abstraction has 162995 states and 438075 transitions. [2021-07-13 18:31:38,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.476190476190474) internal successors, (430), 21 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:38,262 INFO L276 IsEmpty]: Start isEmpty. Operand 162995 states and 438075 transitions. [2021-07-13 18:31:39,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-07-13 18:31:39,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:31:39,135 INFO L508 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] [2021-07-13 18:31:39,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:31:39,336 INFO L430 AbstractCegarLoop]: === Iteration 121 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:31:39,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:31:39,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1245146605, now seen corresponding path program 35 times [2021-07-13 18:31:39,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:31:39,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684826639] [2021-07-13 18:31:39,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:31:39,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:31:39,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1713 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-07-13 18:31:39,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:31:39,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684826639] [2021-07-13 18:31:39,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684826639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:39,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736465254] [2021-07-13 18:31:39,567 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 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 [2021-07-13 18:31:40,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-13 18:31:40,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:31:40,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:31:40,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:31:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:31:40,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736465254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:40,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:31:40,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 24 [2021-07-13 18:31:40,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169668056] [2021-07-13 18:31:40,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 18:31:40,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:31:40,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 18:31:40,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-13 18:31:40,666 INFO L87 Difference]: Start difference. First operand 162995 states and 438075 transitions. Second operand has 24 states, 24 states have (on average 19.416666666666668) internal successors, (466), 24 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:40,866 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-07-13 18:31:42,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:31:42,201 INFO L93 Difference]: Finished difference Result 178715 states and 477569 transitions. [2021-07-13 18:31:42,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 18:31:42,202 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 19.416666666666668) internal successors, (466), 24 states have internal predecessors, (466), 0 states have call successors, (0), 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 [2021-07-13 18:31:42,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:31:42,690 INFO L225 Difference]: With dead ends: 178715 [2021-07-13 18:31:42,690 INFO L226 Difference]: Without dead ends: 178715 [2021-07-13 18:31:42,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 508.3ms TimeCoverageRelationStatistics Valid=629, Invalid=1441, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 18:31:43,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178715 states. [2021-07-13 18:31:46,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178715 to 164075. [2021-07-13 18:31:46,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164075 states, 164073 states have (on average 2.6880047296020675) internal successors, (441029), 164074 states have internal predecessors, (441029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:47,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164075 states to 164075 states and 441029 transitions. [2021-07-13 18:31:47,876 INFO L78 Accepts]: Start accepts. Automaton has 164075 states and 441029 transitions. Word has length 444 [2021-07-13 18:31:47,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:31:47,877 INFO L482 AbstractCegarLoop]: Abstraction has 164075 states and 441029 transitions. [2021-07-13 18:31:47,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 19.416666666666668) internal successors, (466), 24 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:47,877 INFO L276 IsEmpty]: Start isEmpty. Operand 164075 states and 441029 transitions. [2021-07-13 18:31:48,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-07-13 18:31:48,315 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:31:48,315 INFO L508 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] [2021-07-13 18:31:48,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:31:48,541 INFO L430 AbstractCegarLoop]: === Iteration 122 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:31:48,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:31:48,541 INFO L82 PathProgramCache]: Analyzing trace with hash 839789955, now seen corresponding path program 36 times [2021-07-13 18:31:48,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:31:48,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497144923] [2021-07-13 18:31:48,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:31:48,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:31:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:31:48,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:31:48,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497144923] [2021-07-13 18:31:48,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497144923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:48,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31645070] [2021-07-13 18:31:48,844 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 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 [2021-07-13 18:31:49,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-13 18:31:49,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:31:49,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:31:49,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:31:50,424 WARN L205 SmtUtils]: Spent 508.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:31:50,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:31:50,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31645070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:50,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:31:50,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-13 18:31:50,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854432183] [2021-07-13 18:31:50,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 18:31:50,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:31:50,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 18:31:50,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-13 18:31:50,838 INFO L87 Difference]: Start difference. First operand 164075 states and 441029 transitions. Second operand has 24 states, 24 states have (on average 19.416666666666668) internal successors, (466), 24 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:52,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:31:52,347 INFO L93 Difference]: Finished difference Result 186875 states and 498181 transitions. [2021-07-13 18:31:52,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 18:31:52,348 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 19.416666666666668) internal successors, (466), 24 states have internal predecessors, (466), 0 states have call successors, (0), 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 [2021-07-13 18:31:52,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:31:53,324 INFO L225 Difference]: With dead ends: 186875 [2021-07-13 18:31:53,325 INFO L226 Difference]: Without dead ends: 186875 [2021-07-13 18:31:53,325 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 395.9ms TimeCoverageRelationStatistics Valid=550, Invalid=1342, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 18:31:53,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186875 states. [2021-07-13 18:31:57,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186875 to 162995. [2021-07-13 18:31:57,587 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) Received shutdown request... [2021-07-13 18:31:58,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-07-13 18:31:58,121 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 18:31:58,121 INFO L301 ceAbstractionStarter]: Result for error location t1Thread1of1ForFork1 was TIMEOUT (1/3) [2021-07-13 18:31:58,123 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-07-13 18:31:58,124 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 18:31:58,124 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 18:31:58,124 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 18:31:58,124 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 18:31:58,124 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 18:31:58,124 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 18:31:58,124 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 18:31:58,124 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 18:31:58,127 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 152 places, 157 transitions, 336 flow [2021-07-13 18:31:58,127 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 18:31:58,127 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was TIMEOUT (2/3) [2021-07-13 18:31:58,128 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-13 18:31:58,128 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 18:31:58,128 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 18:31:58,128 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 18:31:58,128 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 18:31:58,129 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 18:31:58,129 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 18:31:58,129 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 18:31:58,129 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == t2Thread1of1ForFork0======== [2021-07-13 18:31:58,131 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 152 places, 157 transitions, 336 flow [2021-07-13 18:31:58,131 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 18:31:58,131 INFO L301 ceAbstractionStarter]: Result for error location t2Thread1of1ForFork0 was TIMEOUT (3/3) [2021-07-13 18:31:58,132 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 18:31:58,134 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 18:31:58,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 06:31:58 BasicIcfg [2021-07-13 18:31:58,134 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 18:31:58,135 INFO L168 Benchmark]: Toolchain (without parser) took 650748.23 ms. Allocated memory was 208.7 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 172.0 MB in the beginning and 6.6 GB in the end (delta: -6.4 GB). Peak memory consumption was 1.4 GB. Max. memory is 8.0 GB. [2021-07-13 18:31:58,135 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 208.7 MB. Free memory is still 190.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 18:31:58,135 INFO L168 Benchmark]: CACSL2BoogieTranslator took 506.39 ms. Allocated memory is still 208.7 MB. Free memory was 171.8 MB in the beginning and 173.3 MB in the end (delta: -1.5 MB). Peak memory consumption was 12.9 MB. Max. memory is 8.0 GB. [2021-07-13 18:31:58,135 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.96 ms. Allocated memory is still 208.7 MB. Free memory was 173.3 MB in the beginning and 170.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-07-13 18:31:58,135 INFO L168 Benchmark]: Boogie Preprocessor took 26.90 ms. Allocated memory is still 208.7 MB. Free memory was 170.7 MB in the beginning and 169.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 18:31:58,135 INFO L168 Benchmark]: RCFGBuilder took 652.23 ms. Allocated memory is still 208.7 MB. Free memory was 169.1 MB in the beginning and 135.0 MB in the end (delta: 34.1 MB). Peak memory consumption was 34.6 MB. Max. memory is 8.0 GB. [2021-07-13 18:31:58,135 INFO L168 Benchmark]: TraceAbstraction took 649506.61 ms. Allocated memory was 208.7 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 134.5 MB in the beginning and 6.6 GB in the end (delta: -6.4 GB). Peak memory consumption was 1.4 GB. Max. memory is 8.0 GB. [2021-07-13 18:31:58,137 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 208.7 MB. Free memory is still 190.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 506.39 ms. Allocated memory is still 208.7 MB. Free memory was 171.8 MB in the beginning and 173.3 MB in the end (delta: -1.5 MB). Peak memory consumption was 12.9 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 45.96 ms. Allocated memory is still 208.7 MB. Free memory was 173.3 MB in the beginning and 170.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 26.90 ms. Allocated memory is still 208.7 MB. Free memory was 170.7 MB in the beginning and 169.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 652.23 ms. Allocated memory is still 208.7 MB. Free memory was 169.1 MB in the beginning and 135.0 MB in the end (delta: 34.1 MB). Peak memory consumption was 34.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 649506.61 ms. Allocated memory was 208.7 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 134.5 MB in the beginning and 6.6 GB in the end (delta: -6.4 GB). Peak memory consumption was 1.4 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 940]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while ReachableStatesComputation was computing reachable states (96420 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 940]: 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: 649360.4ms, OverallIterations: 122, TraceHistogramMax: 12, EmptinessCheckTime: 33149.9ms, AutomataDifference: 152404.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 297.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 18985 SDtfs, 165776 SDslu, 158756 SDs, 0 SdLazy, 14553 SolverSat, 2587 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8234.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 47711 GetRequests, 43874 SyntacticMatches, 1 SemanticMatches, 3836 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27168 ImplicationChecksByTransitivity, 32858.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=164075occurred in iteration=121, InterpolantAutomatonStates: 3016, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 306282.7ms AutomataMinimizationTime, 122 MinimizatonAttempts, 3329300 StatesRemovedByMinimization, 121 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 5970.4ms SsaConstructionTime, 29529.9ms SatisfiabilityAnalysisTime, 88247.5ms InterpolantComputationTime, 87102 NumberOfCodeBlocks, 86928 NumberOfCodeBlocksAsserted, 636 NumberOfCheckSat, 86862 ConstructedInterpolants, 0 QuantifiedInterpolants, 252159 SizeOfPredicates, 2076 NumberOfNonLiveVariables, 83721 ConjunctsInSsa, 2326 ConjunctsInUnsatCore, 240 InterpolantComputations, 5 PerfectInterpolantSequences, 18155/238736 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: 3.5ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 2.7ms, 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: 3.1ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 2.4ms, 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 RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown