/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-04 21:40:11,855 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-04 21:40:11,858 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-04 21:40:11,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-04 21:40:11,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-04 21:40:11,886 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-04 21:40:11,887 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-04 21:40:11,898 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-04 21:40:11,899 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-04 21:40:11,900 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-04 21:40:11,901 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-04 21:40:11,902 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-04 21:40:11,902 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-04 21:40:11,905 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-04 21:40:11,907 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-04 21:40:11,908 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-04 21:40:11,911 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-04 21:40:11,917 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-04 21:40:11,918 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-04 21:40:11,920 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-04 21:40:11,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-04 21:40:11,922 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-04 21:40:11,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-04 21:40:11,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-04 21:40:11,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-04 21:40:11,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-04 21:40:11,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-04 21:40:11,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-04 21:40:11,934 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-04 21:40:11,967 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-04 21:40:11,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-04 21:40:11,967 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-04 21:40:11,968 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-04 21:40:11,969 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-04 21:40:11,969 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-04 21:40:11,969 INFO L138 SettingsManager]: * Use SBE=true [2021-06-04 21:40:11,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-04 21:40:11,969 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-04 21:40:11,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-04 21:40:11,970 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-04 21:40:11,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-04 21:40:11,970 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-04 21:40:11,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-04 21:40:11,970 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-04 21:40:11,971 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-04 21:40:11,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-04 21:40:11,971 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-04 21:40:11,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-04 21:40:11,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-04 21:40:11,972 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-04 21:40:11,972 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-04 21:40:11,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-04 21:40:11,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-04 21:40:11,975 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-04 21:40:11,975 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-04 21:40:11,975 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-04 21:40:11,975 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-04 21:40:11,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-04 21:40:11,976 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-04 21:40:11,976 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-04 21:40:11,976 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-04 21:40:12,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-04 21:40:12,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-04 21:40:12,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-04 21:40:12,323 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-04 21:40:12,325 INFO L275 PluginConnector]: CDTParser initialized [2021-06-04 21:40:12,326 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2021-06-04 21:40:12,381 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaa7159df/2de3a2d5128c4985b4ab651dde21ef03/FLAGebf9df5bc [2021-06-04 21:40:12,915 INFO L306 CDTParser]: Found 1 translation units. [2021-06-04 21:40:12,916 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2021-06-04 21:40:12,928 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaa7159df/2de3a2d5128c4985b4ab651dde21ef03/FLAGebf9df5bc [2021-06-04 21:40:13,392 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaa7159df/2de3a2d5128c4985b4ab651dde21ef03 [2021-06-04 21:40:13,395 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-04 21:40:13,396 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-04 21:40:13,413 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-04 21:40:13,413 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-04 21:40:13,416 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-04 21:40:13,417 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 09:40:13" (1/1) ... [2021-06-04 21:40:13,418 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@352dc458 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:40:13, skipping insertion in model container [2021-06-04 21:40:13,418 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 09:40:13" (1/1) ... [2021-06-04 21:40:13,424 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-04 21:40:13,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-04 21:40:13,872 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/triangular-1.i[30950,30963] [2021-06-04 21:40:13,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-04 21:40:13,881 INFO L203 MainTranslator]: Completed pre-run [2021-06-04 21:40:13,911 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/triangular-1.i[30950,30963] [2021-06-04 21:40:13,912 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-04 21:40:13,982 INFO L208 MainTranslator]: Completed translation [2021-06-04 21:40:13,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:40:13 WrapperNode [2021-06-04 21:40:13,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-04 21:40:13,984 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-04 21:40:13,984 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-04 21:40:13,984 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-04 21:40:13,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:40:13" (1/1) ... [2021-06-04 21:40:14,017 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:40:13" (1/1) ... [2021-06-04 21:40:14,031 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-04 21:40:14,032 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-04 21:40:14,032 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-04 21:40:14,032 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-04 21:40:14,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:40:13" (1/1) ... [2021-06-04 21:40:14,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:40:13" (1/1) ... [2021-06-04 21:40:14,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:40:13" (1/1) ... [2021-06-04 21:40:14,040 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:40:13" (1/1) ... [2021-06-04 21:40:14,044 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:40:13" (1/1) ... [2021-06-04 21:40:14,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:40:13" (1/1) ... [2021-06-04 21:40:14,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:40:13" (1/1) ... [2021-06-04 21:40:14,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-04 21:40:14,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-04 21:40:14,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-04 21:40:14,051 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-04 21:40:14,052 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:40:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-04 21:40:14,169 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-06-04 21:40:14,170 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-06-04 21:40:14,170 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-06-04 21:40:14,170 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-06-04 21:40:14,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-04 21:40:14,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-06-04 21:40:14,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-04 21:40:14,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-04 21:40:14,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-04 21:40:14,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-06-04 21:40:14,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-04 21:40:14,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-04 21:40:14,174 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-04 21:40:14,508 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-04 21:40:14,509 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-06-04 21:40:14,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 09:40:14 BoogieIcfgContainer [2021-06-04 21:40:14,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-04 21:40:14,512 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-04 21:40:14,512 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-04 21:40:14,514 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-04 21:40:14,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 09:40:13" (1/3) ... [2021-06-04 21:40:14,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79412132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 09:40:14, skipping insertion in model container [2021-06-04 21:40:14,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:40:13" (2/3) ... [2021-06-04 21:40:14,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79412132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 09:40:14, skipping insertion in model container [2021-06-04 21:40:14,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 09:40:14" (3/3) ... [2021-06-04 21:40:14,517 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2021-06-04 21:40:14,522 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-04 21:40:14,522 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-04 21:40:14,522 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-04 21:40:14,523 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-04 21:40:14,542 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,542 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,543 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,543 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,543 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,543 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,543 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,543 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,544 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,544 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,544 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,544 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,545 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,545 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,545 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,545 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,545 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,546 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,546 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,546 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,546 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,546 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,546 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,547 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,547 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,547 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,547 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,547 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,548 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,548 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,548 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,548 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,548 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,549 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,549 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,549 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,549 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,549 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,549 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,550 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,550 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,550 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,550 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,550 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,550 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,551 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,551 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,551 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,551 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,551 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,552 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,552 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,552 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,552 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,552 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,552 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,554 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,554 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,554 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,555 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,555 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,555 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,559 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,559 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,559 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,559 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,559 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,560 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:40:14,561 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-04 21:40:14,579 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-04 21:40:14,594 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-04 21:40:14,595 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-04 21:40:14,595 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-04 21:40:14,595 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-04 21:40:14,595 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-04 21:40:14,595 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-04 21:40:14,595 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-04 21:40:14,595 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-04 21:40:14,604 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 66 transitions, 142 flow [2021-06-04 21:40:14,685 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:14,690 INFO L276 IsEmpty]: Start isEmpty. Operand has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:14,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-04 21:40:14,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:14,701 INFO L521 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] [2021-06-04 21:40:14,701 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:14,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:14,706 INFO L82 PathProgramCache]: Analyzing trace with hash 855509438, now seen corresponding path program 1 times [2021-06-04 21:40:14,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:14,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984578791] [2021-06-04 21:40:14,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:14,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:15,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:15,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:15,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984578791] [2021-06-04 21:40:15,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984578791] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:40:15,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:40:15,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-04 21:40:15,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117022588] [2021-06-04 21:40:15,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-04 21:40:15,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:15,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-04 21:40:15,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-04 21:40:15,036 INFO L87 Difference]: Start difference. First operand has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 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 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:15,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:15,227 INFO L93 Difference]: Finished difference Result 3467 states and 10030 transitions. [2021-06-04 21:40:15,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-04 21:40:15,229 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-04 21:40:15,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:15,246 INFO L225 Difference]: With dead ends: 3467 [2021-06-04 21:40:15,246 INFO L226 Difference]: Without dead ends: 1242 [2021-06-04 21:40:15,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 72.9ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-04 21:40:15,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2021-06-04 21:40:15,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 942. [2021-06-04 21:40:15,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 941 states have (on average 2.7077577045696066) internal successors, (2548), 941 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:15,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 2548 transitions. [2021-06-04 21:40:15,337 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 2548 transitions. Word has length 32 [2021-06-04 21:40:15,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:15,337 INFO L482 AbstractCegarLoop]: Abstraction has 942 states and 2548 transitions. [2021-06-04 21:40:15,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:15,337 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 2548 transitions. [2021-06-04 21:40:15,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-04 21:40:15,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:15,344 INFO L521 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] [2021-06-04 21:40:15,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-04 21:40:15,344 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:15,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:15,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1720134605, now seen corresponding path program 1 times [2021-06-04 21:40:15,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:15,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995889610] [2021-06-04 21:40:15,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:15,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:15,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:15,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:15,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995889610] [2021-06-04 21:40:15,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995889610] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:40:15,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:40:15,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-04 21:40:15,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206139822] [2021-06-04 21:40:15,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-04 21:40:15,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:15,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-04 21:40:15,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-04 21:40:15,444 INFO L87 Difference]: Start difference. First operand 942 states and 2548 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:15,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:15,569 INFO L93 Difference]: Finished difference Result 1194 states and 3180 transitions. [2021-06-04 21:40:15,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-04 21:40:15,570 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-04 21:40:15,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:15,579 INFO L225 Difference]: With dead ends: 1194 [2021-06-04 21:40:15,579 INFO L226 Difference]: Without dead ends: 942 [2021-06-04 21:40:15,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-04 21:40:15,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-06-04 21:40:15,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 800. [2021-06-04 21:40:15,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.728410513141427) internal successors, (2180), 799 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:15,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2180 transitions. [2021-06-04 21:40:15,621 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2180 transitions. Word has length 36 [2021-06-04 21:40:15,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:15,622 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2180 transitions. [2021-06-04 21:40:15,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:15,622 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2180 transitions. [2021-06-04 21:40:15,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-04 21:40:15,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:15,624 INFO L521 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] [2021-06-04 21:40:15,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-04 21:40:15,625 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:15,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:15,626 INFO L82 PathProgramCache]: Analyzing trace with hash 2058414913, now seen corresponding path program 1 times [2021-06-04 21:40:15,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:15,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989505265] [2021-06-04 21:40:15,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:15,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:15,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:15,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989505265] [2021-06-04 21:40:15,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989505265] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:40:15,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:40:15,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-04 21:40:15,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477780421] [2021-06-04 21:40:15,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-04 21:40:15,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:15,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-04 21:40:15,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-04 21:40:15,751 INFO L87 Difference]: Start difference. First operand 800 states and 2180 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:15,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:15,863 INFO L93 Difference]: Finished difference Result 1302 states and 3436 transitions. [2021-06-04 21:40:15,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-04 21:40:15,864 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-04 21:40:15,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:15,869 INFO L225 Difference]: With dead ends: 1302 [2021-06-04 21:40:15,869 INFO L226 Difference]: Without dead ends: 920 [2021-06-04 21:40:15,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-04 21:40:15,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-06-04 21:40:15,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 864. [2021-06-04 21:40:15,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.6882966396292005) internal successors, (2320), 863 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:15,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2320 transitions. [2021-06-04 21:40:15,893 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2320 transitions. Word has length 36 [2021-06-04 21:40:15,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:15,894 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2320 transitions. [2021-06-04 21:40:15,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:15,894 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2320 transitions. [2021-06-04 21:40:15,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-04 21:40:15,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:15,897 INFO L521 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] [2021-06-04 21:40:15,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-04 21:40:15,897 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:15,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:15,899 INFO L82 PathProgramCache]: Analyzing trace with hash 307394794, now seen corresponding path program 1 times [2021-06-04 21:40:15,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:15,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079726434] [2021-06-04 21:40:15,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:15,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:15,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079726434] [2021-06-04 21:40:15,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079726434] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:40:15,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:40:15,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-04 21:40:15,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535105878] [2021-06-04 21:40:15,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-04 21:40:15,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:15,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-04 21:40:15,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-04 21:40:15,997 INFO L87 Difference]: Start difference. First operand 864 states and 2320 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:16,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:16,113 INFO L93 Difference]: Finished difference Result 1332 states and 3512 transitions. [2021-06-04 21:40:16,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-04 21:40:16,114 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-04 21:40:16,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:16,118 INFO L225 Difference]: With dead ends: 1332 [2021-06-04 21:40:16,118 INFO L226 Difference]: Without dead ends: 1072 [2021-06-04 21:40:16,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-04 21:40:16,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-06-04 21:40:16,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 876. [2021-06-04 21:40:16,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.7062857142857144) internal successors, (2368), 875 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:16,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2368 transitions. [2021-06-04 21:40:16,140 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2368 transitions. Word has length 40 [2021-06-04 21:40:16,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:16,140 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2368 transitions. [2021-06-04 21:40:16,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:16,141 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2368 transitions. [2021-06-04 21:40:16,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-04 21:40:16,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:16,142 INFO L521 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] [2021-06-04 21:40:16,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-04 21:40:16,142 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:16,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:16,143 INFO L82 PathProgramCache]: Analyzing trace with hash -258094508, now seen corresponding path program 2 times [2021-06-04 21:40:16,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:16,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081381633] [2021-06-04 21:40:16,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:16,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:16,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:16,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081381633] [2021-06-04 21:40:16,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081381633] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:40:16,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:40:16,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-04 21:40:16,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918324972] [2021-06-04 21:40:16,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-04 21:40:16,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:16,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-04 21:40:16,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-04 21:40:16,218 INFO L87 Difference]: Start difference. First operand 876 states and 2368 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:16,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:16,330 INFO L93 Difference]: Finished difference Result 1772 states and 4744 transitions. [2021-06-04 21:40:16,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-04 21:40:16,330 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-04 21:40:16,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:16,337 INFO L225 Difference]: With dead ends: 1772 [2021-06-04 21:40:16,337 INFO L226 Difference]: Without dead ends: 1505 [2021-06-04 21:40:16,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-04 21:40:16,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-06-04 21:40:16,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 975. [2021-06-04 21:40:16,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 2.6981519507186857) internal successors, (2628), 974 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:16,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2628 transitions. [2021-06-04 21:40:16,364 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2628 transitions. Word has length 40 [2021-06-04 21:40:16,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:16,364 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 2628 transitions. [2021-06-04 21:40:16,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:16,365 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2628 transitions. [2021-06-04 21:40:16,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-04 21:40:16,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:16,366 INFO L521 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] [2021-06-04 21:40:16,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-04 21:40:16,366 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:16,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:16,367 INFO L82 PathProgramCache]: Analyzing trace with hash 129784312, now seen corresponding path program 3 times [2021-06-04 21:40:16,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:16,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495788990] [2021-06-04 21:40:16,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:16,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:16,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:16,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495788990] [2021-06-04 21:40:16,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495788990] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:40:16,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:40:16,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-04 21:40:16,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573042093] [2021-06-04 21:40:16,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-04 21:40:16,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:16,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-04 21:40:16,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-04 21:40:16,456 INFO L87 Difference]: Start difference. First operand 975 states and 2628 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:16,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:16,553 INFO L93 Difference]: Finished difference Result 2211 states and 5878 transitions. [2021-06-04 21:40:16,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-04 21:40:16,554 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-04 21:40:16,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:16,562 INFO L225 Difference]: With dead ends: 2211 [2021-06-04 21:40:16,562 INFO L226 Difference]: Without dead ends: 1944 [2021-06-04 21:40:16,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-04 21:40:16,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-06-04 21:40:16,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1127. [2021-06-04 21:40:16,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1126 states have (on average 2.769982238010657) internal successors, (3119), 1126 states have internal predecessors, (3119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:16,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3119 transitions. [2021-06-04 21:40:16,607 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3119 transitions. Word has length 40 [2021-06-04 21:40:16,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:16,607 INFO L482 AbstractCegarLoop]: Abstraction has 1127 states and 3119 transitions. [2021-06-04 21:40:16,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:16,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3119 transitions. [2021-06-04 21:40:16,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-04 21:40:16,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:16,613 INFO L521 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] [2021-06-04 21:40:16,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-04 21:40:16,613 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:16,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:16,614 INFO L82 PathProgramCache]: Analyzing trace with hash 152127562, now seen corresponding path program 4 times [2021-06-04 21:40:16,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:16,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068840407] [2021-06-04 21:40:16,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:16,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:16,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:16,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:16,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068840407] [2021-06-04 21:40:16,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068840407] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:40:16,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:40:16,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-04 21:40:16,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567785290] [2021-06-04 21:40:16,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-04 21:40:16,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:16,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-04 21:40:16,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-04 21:40:16,714 INFO L87 Difference]: Start difference. First operand 1127 states and 3119 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:16,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:16,846 INFO L93 Difference]: Finished difference Result 1519 states and 4031 transitions. [2021-06-04 21:40:16,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-04 21:40:16,847 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-04 21:40:16,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:16,851 INFO L225 Difference]: With dead ends: 1519 [2021-06-04 21:40:16,852 INFO L226 Difference]: Without dead ends: 1138 [2021-06-04 21:40:16,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-04 21:40:16,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-06-04 21:40:16,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1033. [2021-06-04 21:40:16,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 2.73546511627907) internal successors, (2823), 1032 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:16,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2823 transitions. [2021-06-04 21:40:16,875 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2823 transitions. Word has length 40 [2021-06-04 21:40:16,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:16,875 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 2823 transitions. [2021-06-04 21:40:16,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:16,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2823 transitions. [2021-06-04 21:40:16,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-04 21:40:16,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:16,877 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-04 21:40:16,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-04 21:40:16,877 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:16,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:16,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1301576209, now seen corresponding path program 1 times [2021-06-04 21:40:16,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:16,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536333641] [2021-06-04 21:40:16,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:16,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:16,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:16,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536333641] [2021-06-04 21:40:16,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536333641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:16,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995341419] [2021-06-04 21:40:16,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:17,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:17,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-04 21:40:17,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:17,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:17,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995341419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:17,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:17,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-04 21:40:17,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927227270] [2021-06-04 21:40:17,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-04 21:40:17,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:17,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-04 21:40:17,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-04 21:40:17,350 INFO L87 Difference]: Start difference. First operand 1033 states and 2823 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:17,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:17,509 INFO L93 Difference]: Finished difference Result 1451 states and 3787 transitions. [2021-06-04 21:40:17,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-04 21:40:17,510 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-04 21:40:17,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:17,515 INFO L225 Difference]: With dead ends: 1451 [2021-06-04 21:40:17,515 INFO L226 Difference]: Without dead ends: 1181 [2021-06-04 21:40:17,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 147.6ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:40:17,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-06-04 21:40:17,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1083. [2021-06-04 21:40:17,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 1082 states have (on average 2.7060998151571165) internal successors, (2928), 1082 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:17,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 2928 transitions. [2021-06-04 21:40:17,547 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 2928 transitions. Word has length 45 [2021-06-04 21:40:17,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:17,548 INFO L482 AbstractCegarLoop]: Abstraction has 1083 states and 2928 transitions. [2021-06-04 21:40:17,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:17,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 2928 transitions. [2021-06-04 21:40:17,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-04 21:40:17,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:17,550 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-04 21:40:17,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-06-04 21:40:17,765 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:17,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:17,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1689455029, now seen corresponding path program 2 times [2021-06-04 21:40:17,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:17,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323012003] [2021-06-04 21:40:17,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:17,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:17,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:17,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:17,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323012003] [2021-06-04 21:40:17,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323012003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:17,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747221526] [2021-06-04 21:40:17,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:17,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:40:17,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:17,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-04 21:40:17,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:18,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:18,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747221526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:18,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:18,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-04 21:40:18,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785684200] [2021-06-04 21:40:18,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-04 21:40:18,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:18,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-04 21:40:18,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-04 21:40:18,054 INFO L87 Difference]: Start difference. First operand 1083 states and 2928 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:18,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:18,199 INFO L93 Difference]: Finished difference Result 2333 states and 6191 transitions. [2021-06-04 21:40:18,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-04 21:40:18,199 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-04 21:40:18,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:18,207 INFO L225 Difference]: With dead ends: 2333 [2021-06-04 21:40:18,208 INFO L226 Difference]: Without dead ends: 2063 [2021-06-04 21:40:18,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:40:18,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-06-04 21:40:18,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1218. [2021-06-04 21:40:18,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 2.7666392769104355) internal successors, (3367), 1217 states have internal predecessors, (3367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:18,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 3367 transitions. [2021-06-04 21:40:18,241 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 3367 transitions. Word has length 45 [2021-06-04 21:40:18,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:18,242 INFO L482 AbstractCegarLoop]: Abstraction has 1218 states and 3367 transitions. [2021-06-04 21:40:18,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:18,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 3367 transitions. [2021-06-04 21:40:18,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-04 21:40:18,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:18,244 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-04 21:40:18,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:18,467 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:18,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:18,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1711798279, now seen corresponding path program 3 times [2021-06-04 21:40:18,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:18,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544634431] [2021-06-04 21:40:18,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:18,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:18,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:18,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:18,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544634431] [2021-06-04 21:40:18,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544634431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:18,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612705794] [2021-06-04 21:40:18,529 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:18,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-04 21:40:18,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:18,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-04 21:40:18,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:18,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:18,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612705794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:18,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:18,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-04 21:40:18,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398369139] [2021-06-04 21:40:18,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-04 21:40:18,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:18,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-04 21:40:18,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-04 21:40:18,779 INFO L87 Difference]: Start difference. First operand 1218 states and 3367 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:19,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:19,062 INFO L93 Difference]: Finished difference Result 2121 states and 5621 transitions. [2021-06-04 21:40:19,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-04 21:40:19,062 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-04 21:40:19,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:19,071 INFO L225 Difference]: With dead ends: 2121 [2021-06-04 21:40:19,071 INFO L226 Difference]: Without dead ends: 1546 [2021-06-04 21:40:19,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 230.6ms TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:40:19,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2021-06-04 21:40:19,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1253. [2021-06-04 21:40:19,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1252 states have (on average 2.7619808306709266) internal successors, (3458), 1252 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:19,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 3458 transitions. [2021-06-04 21:40:19,102 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 3458 transitions. Word has length 45 [2021-06-04 21:40:19,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:19,102 INFO L482 AbstractCegarLoop]: Abstraction has 1253 states and 3458 transitions. [2021-06-04 21:40:19,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:19,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 3458 transitions. [2021-06-04 21:40:19,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-04 21:40:19,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:19,104 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-04 21:40:19,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-04 21:40:19,327 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:19,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:19,328 INFO L82 PathProgramCache]: Analyzing trace with hash 315802636, now seen corresponding path program 1 times [2021-06-04 21:40:19,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:19,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587013350] [2021-06-04 21:40:19,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:19,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:19,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:19,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587013350] [2021-06-04 21:40:19,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587013350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:19,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097107739] [2021-06-04 21:40:19,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:19,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-04 21:40:19,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:19,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:19,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097107739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:19,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:19,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-04 21:40:19,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698343618] [2021-06-04 21:40:19,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-04 21:40:19,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:19,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-04 21:40:19,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-04 21:40:19,626 INFO L87 Difference]: Start difference. First operand 1253 states and 3458 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:19,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:19,767 INFO L93 Difference]: Finished difference Result 2398 states and 6444 transitions. [2021-06-04 21:40:19,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-04 21:40:19,768 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-04 21:40:19,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:19,776 INFO L225 Difference]: With dead ends: 2398 [2021-06-04 21:40:19,776 INFO L226 Difference]: Without dead ends: 1926 [2021-06-04 21:40:19,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:40:19,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-06-04 21:40:19,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1456. [2021-06-04 21:40:19,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 2.727835051546392) internal successors, (3969), 1455 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:19,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 3969 transitions. [2021-06-04 21:40:19,813 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 3969 transitions. Word has length 45 [2021-06-04 21:40:19,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:19,814 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 3969 transitions. [2021-06-04 21:40:19,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:19,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 3969 transitions. [2021-06-04 21:40:19,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-04 21:40:19,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:19,817 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-06-04 21:40:20,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:20,028 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:20,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:20,028 INFO L82 PathProgramCache]: Analyzing trace with hash 456189922, now seen corresponding path program 1 times [2021-06-04 21:40:20,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:20,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053905766] [2021-06-04 21:40:20,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:20,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:20,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:20,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:20,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053905766] [2021-06-04 21:40:20,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053905766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:20,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490347722] [2021-06-04 21:40:20,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:20,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:20,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:40:20,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:20,312 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:20,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490347722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:20,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:20,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-04 21:40:20,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795561232] [2021-06-04 21:40:20,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-04 21:40:20,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:20,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-04 21:40:20,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-04 21:40:20,316 INFO L87 Difference]: Start difference. First operand 1456 states and 3969 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:20,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:20,475 INFO L93 Difference]: Finished difference Result 1866 states and 4917 transitions. [2021-06-04 21:40:20,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-04 21:40:20,476 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-04 21:40:20,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:20,482 INFO L225 Difference]: With dead ends: 1866 [2021-06-04 21:40:20,482 INFO L226 Difference]: Without dead ends: 1596 [2021-06-04 21:40:20,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 144.9ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:40:20,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-06-04 21:40:20,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1531. [2021-06-04 21:40:20,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 2.6921568627450982) internal successors, (4119), 1530 states have internal predecessors, (4119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:20,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 4119 transitions. [2021-06-04 21:40:20,510 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 4119 transitions. Word has length 55 [2021-06-04 21:40:20,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:20,511 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 4119 transitions. [2021-06-04 21:40:20,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:20,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 4119 transitions. [2021-06-04 21:40:20,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-04 21:40:20,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:20,513 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-06-04 21:40:20,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-04 21:40:20,729 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:20,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:20,729 INFO L82 PathProgramCache]: Analyzing trace with hash 117785766, now seen corresponding path program 2 times [2021-06-04 21:40:20,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:20,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277194295] [2021-06-04 21:40:20,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:20,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:20,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:20,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277194295] [2021-06-04 21:40:20,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277194295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:20,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57347126] [2021-06-04 21:40:20,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:20,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:40:20,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:20,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:40:20,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:21,072 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:21,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57347126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:21,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:21,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-04 21:40:21,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633473105] [2021-06-04 21:40:21,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-04 21:40:21,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:21,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-04 21:40:21,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-04 21:40:21,074 INFO L87 Difference]: Start difference. First operand 1531 states and 4119 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:21,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:21,239 INFO L93 Difference]: Finished difference Result 1981 states and 5147 transitions. [2021-06-04 21:40:21,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-04 21:40:21,239 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-04 21:40:21,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:21,256 INFO L225 Difference]: With dead ends: 1981 [2021-06-04 21:40:21,256 INFO L226 Difference]: Without dead ends: 1711 [2021-06-04 21:40:21,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 140.9ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:40:21,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2021-06-04 21:40:21,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1531. [2021-06-04 21:40:21,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 2.6921568627450982) internal successors, (4119), 1530 states have internal predecessors, (4119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:21,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 4119 transitions. [2021-06-04 21:40:21,287 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 4119 transitions. Word has length 55 [2021-06-04 21:40:21,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:21,287 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 4119 transitions. [2021-06-04 21:40:21,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:21,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 4119 transitions. [2021-06-04 21:40:21,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-04 21:40:21,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:21,290 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-06-04 21:40:21,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:21,513 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:21,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:21,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1597456522, now seen corresponding path program 3 times [2021-06-04 21:40:21,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:21,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133337602] [2021-06-04 21:40:21,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:21,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:21,589 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:21,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:21,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133337602] [2021-06-04 21:40:21,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133337602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:21,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97241237] [2021-06-04 21:40:21,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:21,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-04 21:40:21,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:21,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:40:21,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:21,771 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:21,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97241237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:21,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:21,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-04 21:40:21,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762033065] [2021-06-04 21:40:21,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-04 21:40:21,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:21,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-04 21:40:21,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-04 21:40:21,773 INFO L87 Difference]: Start difference. First operand 1531 states and 4119 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:22,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:22,058 INFO L93 Difference]: Finished difference Result 2669 states and 6993 transitions. [2021-06-04 21:40:22,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-04 21:40:22,058 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-04 21:40:22,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:22,063 INFO L225 Difference]: With dead ends: 2669 [2021-06-04 21:40:22,063 INFO L226 Difference]: Without dead ends: 2046 [2021-06-04 21:40:22,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 242.6ms TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:40:22,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-06-04 21:40:22,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1561. [2021-06-04 21:40:22,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 2.7205128205128206) internal successors, (4244), 1560 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:22,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 4244 transitions. [2021-06-04 21:40:22,095 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 4244 transitions. Word has length 55 [2021-06-04 21:40:22,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:22,095 INFO L482 AbstractCegarLoop]: Abstraction has 1561 states and 4244 transitions. [2021-06-04 21:40:22,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:22,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 4244 transitions. [2021-06-04 21:40:22,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-04 21:40:22,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:22,098 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-06-04 21:40:22,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-04 21:40:22,321 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:22,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:22,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1664863172, now seen corresponding path program 4 times [2021-06-04 21:40:22,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:22,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356345986] [2021-06-04 21:40:22,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:22,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:22,388 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:22,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:22,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356345986] [2021-06-04 21:40:22,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356345986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:22,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422123529] [2021-06-04 21:40:22,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:22,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:40:22,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:22,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:40:22,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:22,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422123529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:22,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:22,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-04 21:40:22,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130327572] [2021-06-04 21:40:22,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-04 21:40:22,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:22,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-04 21:40:22,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-04 21:40:22,567 INFO L87 Difference]: Start difference. First operand 1561 states and 4244 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:22,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:22,795 INFO L93 Difference]: Finished difference Result 2878 states and 7671 transitions. [2021-06-04 21:40:22,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-04 21:40:22,795 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-04 21:40:22,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:22,801 INFO L225 Difference]: With dead ends: 2878 [2021-06-04 21:40:22,801 INFO L226 Difference]: Without dead ends: 2608 [2021-06-04 21:40:22,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 184.7ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:40:22,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-06-04 21:40:22,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 1741. [2021-06-04 21:40:22,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1740 states have (on average 2.760344827586207) internal successors, (4803), 1740 states have internal predecessors, (4803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:22,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 4803 transitions. [2021-06-04 21:40:22,840 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 4803 transitions. Word has length 55 [2021-06-04 21:40:22,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:22,840 INFO L482 AbstractCegarLoop]: Abstraction has 1741 states and 4803 transitions. [2021-06-04 21:40:22,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:22,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 4803 transitions. [2021-06-04 21:40:22,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-04 21:40:22,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:22,843 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-06-04 21:40:23,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-04 21:40:23,059 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:23,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:23,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1687206422, now seen corresponding path program 5 times [2021-06-04 21:40:23,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:23,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802678356] [2021-06-04 21:40:23,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:23,127 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:23,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:23,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802678356] [2021-06-04 21:40:23,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802678356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:23,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318550631] [2021-06-04 21:40:23,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:23,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-04 21:40:23,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:23,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:40:23,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:23,319 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:23,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318550631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:23,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:23,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-04 21:40:23,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858995779] [2021-06-04 21:40:23,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-04 21:40:23,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:23,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-04 21:40:23,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-04 21:40:23,320 INFO L87 Difference]: Start difference. First operand 1741 states and 4803 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:23,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:23,648 INFO L93 Difference]: Finished difference Result 2821 states and 7531 transitions. [2021-06-04 21:40:23,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-04 21:40:23,649 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-04 21:40:23,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:23,654 INFO L225 Difference]: With dead ends: 2821 [2021-06-04 21:40:23,654 INFO L226 Difference]: Without dead ends: 2246 [2021-06-04 21:40:23,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 265.1ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:40:23,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2021-06-04 21:40:23,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 1656. [2021-06-04 21:40:23,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 2.730513595166163) internal successors, (4519), 1655 states have internal predecessors, (4519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:23,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 4519 transitions. [2021-06-04 21:40:23,687 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 4519 transitions. Word has length 55 [2021-06-04 21:40:23,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:23,688 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 4519 transitions. [2021-06-04 21:40:23,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:23,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 4519 transitions. [2021-06-04 21:40:23,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-04 21:40:23,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:23,690 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-06-04 21:40:23,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-04 21:40:23,914 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:23,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:23,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1535924432, now seen corresponding path program 6 times [2021-06-04 21:40:23,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:23,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142672880] [2021-06-04 21:40:23,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:23,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:23,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-04 21:40:23,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:23,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142672880] [2021-06-04 21:40:23,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142672880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:23,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261834889] [2021-06-04 21:40:23,992 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:24,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-04 21:40:24,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:24,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:40:24,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:24,298 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-04 21:40:24,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261834889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:24,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:24,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-04 21:40:24,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619104868] [2021-06-04 21:40:24,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-04 21:40:24,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:24,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-04 21:40:24,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-04 21:40:24,300 INFO L87 Difference]: Start difference. First operand 1656 states and 4519 transitions. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:24,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:24,491 INFO L93 Difference]: Finished difference Result 2561 states and 6649 transitions. [2021-06-04 21:40:24,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-04 21:40:24,492 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-04 21:40:24,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:24,497 INFO L225 Difference]: With dead ends: 2561 [2021-06-04 21:40:24,497 INFO L226 Difference]: Without dead ends: 2212 [2021-06-04 21:40:24,497 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 174.0ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:40:24,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-06-04 21:40:24,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1658. [2021-06-04 21:40:24,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 2.7296318648159326) internal successors, (4523), 1657 states have internal predecessors, (4523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:24,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 4523 transitions. [2021-06-04 21:40:24,537 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 4523 transitions. Word has length 55 [2021-06-04 21:40:24,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:24,537 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 4523 transitions. [2021-06-04 21:40:24,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:24,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 4523 transitions. [2021-06-04 21:40:24,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-04 21:40:24,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:24,540 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-06-04 21:40:24,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-04 21:40:24,763 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:24,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:24,764 INFO L82 PathProgramCache]: Analyzing trace with hash 8869516, now seen corresponding path program 7 times [2021-06-04 21:40:24,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:24,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650059401] [2021-06-04 21:40:24,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:24,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:24,855 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-04 21:40:24,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:24,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650059401] [2021-06-04 21:40:24,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650059401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:24,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651375121] [2021-06-04 21:40:24,856 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:24,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-04 21:40:24,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:25,040 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-04 21:40:25,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651375121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:25,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:25,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-04 21:40:25,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554549357] [2021-06-04 21:40:25,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-04 21:40:25,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:25,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-04 21:40:25,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-04 21:40:25,042 INFO L87 Difference]: Start difference. First operand 1658 states and 4523 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:25,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:25,161 INFO L93 Difference]: Finished difference Result 2311 states and 5957 transitions. [2021-06-04 21:40:25,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-04 21:40:25,161 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-04 21:40:25,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:25,165 INFO L225 Difference]: With dead ends: 2311 [2021-06-04 21:40:25,165 INFO L226 Difference]: Without dead ends: 2026 [2021-06-04 21:40:25,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:40:25,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2021-06-04 21:40:25,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 1638. [2021-06-04 21:40:25,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 2.7385461209529627) internal successors, (4483), 1637 states have internal predecessors, (4483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:25,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 4483 transitions. [2021-06-04 21:40:25,198 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 4483 transitions. Word has length 55 [2021-06-04 21:40:25,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:25,198 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 4483 transitions. [2021-06-04 21:40:25,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:25,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 4483 transitions. [2021-06-04 21:40:25,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-04 21:40:25,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:25,201 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-06-04 21:40:25,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:25,425 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:25,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:25,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1697636932, now seen corresponding path program 8 times [2021-06-04 21:40:25,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:25,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212664463] [2021-06-04 21:40:25,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:25,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-04 21:40:25,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:25,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212664463] [2021-06-04 21:40:25,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212664463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:25,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170089272] [2021-06-04 21:40:25,503 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:25,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:40:25,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:25,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-04 21:40:25,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-04 21:40:25,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170089272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:25,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:25,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-04 21:40:25,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605075776] [2021-06-04 21:40:25,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-04 21:40:25,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:25,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-04 21:40:25,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-04 21:40:25,687 INFO L87 Difference]: Start difference. First operand 1638 states and 4483 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:25,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:25,869 INFO L93 Difference]: Finished difference Result 2246 states and 5827 transitions. [2021-06-04 21:40:25,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-04 21:40:25,869 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-04 21:40:25,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:25,873 INFO L225 Difference]: With dead ends: 2246 [2021-06-04 21:40:25,873 INFO L226 Difference]: Without dead ends: 1961 [2021-06-04 21:40:25,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 165.5ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:40:25,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-06-04 21:40:25,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1613. [2021-06-04 21:40:25,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1612 states have (on average 2.75) internal successors, (4433), 1612 states have internal predecessors, (4433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:25,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 4433 transitions. [2021-06-04 21:40:25,903 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 4433 transitions. Word has length 55 [2021-06-04 21:40:25,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:25,903 INFO L482 AbstractCegarLoop]: Abstraction has 1613 states and 4433 transitions. [2021-06-04 21:40:25,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:25,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 4433 transitions. [2021-06-04 21:40:25,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-04 21:40:25,906 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:25,906 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-06-04 21:40:26,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:26,121 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:26,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:26,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1496820963, now seen corresponding path program 9 times [2021-06-04 21:40:26,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:26,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695063939] [2021-06-04 21:40:26,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:26,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:26,187 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:26,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:26,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695063939] [2021-06-04 21:40:26,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695063939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:26,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028082489] [2021-06-04 21:40:26,188 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:26,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-04 21:40:26,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:26,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:40:26,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:26,413 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:26,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028082489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:26,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:26,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-04 21:40:26,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596836824] [2021-06-04 21:40:26,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-04 21:40:26,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:26,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-04 21:40:26,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-04 21:40:26,415 INFO L87 Difference]: Start difference. First operand 1613 states and 4433 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:26,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:26,666 INFO L93 Difference]: Finished difference Result 3288 states and 8870 transitions. [2021-06-04 21:40:26,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-04 21:40:26,666 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-04 21:40:26,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:26,671 INFO L225 Difference]: With dead ends: 3288 [2021-06-04 21:40:26,671 INFO L226 Difference]: Without dead ends: 2476 [2021-06-04 21:40:26,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 204.2ms TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:40:26,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2021-06-04 21:40:26,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 1856. [2021-06-04 21:40:26,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1855 states have (on average 2.7326145552560646) internal successors, (5069), 1855 states have internal predecessors, (5069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:26,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 5069 transitions. [2021-06-04 21:40:26,707 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 5069 transitions. Word has length 55 [2021-06-04 21:40:26,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:26,707 INFO L482 AbstractCegarLoop]: Abstraction has 1856 states and 5069 transitions. [2021-06-04 21:40:26,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:26,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 5069 transitions. [2021-06-04 21:40:26,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-04 21:40:26,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:26,710 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-06-04 21:40:26,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-04 21:40:26,927 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:26,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:26,927 INFO L82 PathProgramCache]: Analyzing trace with hash -2069953421, now seen corresponding path program 10 times [2021-06-04 21:40:26,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:26,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675718134] [2021-06-04 21:40:26,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:26,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:27,044 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:27,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:27,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675718134] [2021-06-04 21:40:27,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675718134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:27,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98059302] [2021-06-04 21:40:27,044 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:27,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:40:27,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:27,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-04 21:40:27,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:27,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98059302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:27,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:27,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-04 21:40:27,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337587277] [2021-06-04 21:40:27,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:40:27,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:27,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:40:27,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:40:27,265 INFO L87 Difference]: Start difference. First operand 1856 states and 5069 transitions. Second operand has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:27,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:27,465 INFO L93 Difference]: Finished difference Result 2316 states and 6117 transitions. [2021-06-04 21:40:27,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-04 21:40:27,465 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-04 21:40:27,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:27,469 INFO L225 Difference]: With dead ends: 2316 [2021-06-04 21:40:27,469 INFO L226 Difference]: Without dead ends: 2046 [2021-06-04 21:40:27,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 198.3ms TimeCoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:40:27,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-06-04 21:40:27,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1931. [2021-06-04 21:40:27,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.704145077720207) internal successors, (5219), 1930 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:27,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-06-04 21:40:27,499 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-06-04 21:40:27,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:27,500 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-06-04 21:40:27,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:27,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-06-04 21:40:27,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-04 21:40:27,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:27,503 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-06-04 21:40:27,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:27,717 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:27,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:27,717 INFO L82 PathProgramCache]: Analyzing trace with hash -423019465, now seen corresponding path program 11 times [2021-06-04 21:40:27,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:27,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314470651] [2021-06-04 21:40:27,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:27,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:27,828 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:27,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:27,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314470651] [2021-06-04 21:40:27,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314470651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:27,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615945924] [2021-06-04 21:40:27,828 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:27,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-04 21:40:27,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:27,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-04 21:40:27,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:28,001 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:28,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615945924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:28,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:28,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-04 21:40:28,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882980893] [2021-06-04 21:40:28,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-04 21:40:28,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:28,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-04 21:40:28,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-04 21:40:28,003 INFO L87 Difference]: Start difference. First operand 1931 states and 5219 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:28,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:28,216 INFO L93 Difference]: Finished difference Result 2481 states and 6447 transitions. [2021-06-04 21:40:28,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-04 21:40:28,216 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-04 21:40:28,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:28,220 INFO L225 Difference]: With dead ends: 2481 [2021-06-04 21:40:28,220 INFO L226 Difference]: Without dead ends: 2211 [2021-06-04 21:40:28,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 207.2ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:40:28,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-06-04 21:40:28,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 1931. [2021-06-04 21:40:28,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.704145077720207) internal successors, (5219), 1930 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:28,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-06-04 21:40:28,249 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-06-04 21:40:28,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:28,249 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-06-04 21:40:28,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:28,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-06-04 21:40:28,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-04 21:40:28,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:28,252 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-06-04 21:40:28,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-04 21:40:28,470 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:28,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:28,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1607299847, now seen corresponding path program 12 times [2021-06-04 21:40:28,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:28,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771428653] [2021-06-04 21:40:28,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:28,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:28,567 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:28,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:28,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771428653] [2021-06-04 21:40:28,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771428653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:28,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947740072] [2021-06-04 21:40:28,567 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:28,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-04 21:40:28,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:28,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-04 21:40:28,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:28,757 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:28,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947740072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:28,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:28,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-04 21:40:28,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788096072] [2021-06-04 21:40:28,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:40:28,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:28,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:40:28,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:40:28,758 INFO L87 Difference]: Start difference. First operand 1931 states and 5219 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:29,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:29,007 INFO L93 Difference]: Finished difference Result 2566 states and 6617 transitions. [2021-06-04 21:40:29,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-04 21:40:29,007 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-04 21:40:29,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:29,010 INFO L225 Difference]: With dead ends: 2566 [2021-06-04 21:40:29,010 INFO L226 Difference]: Without dead ends: 2296 [2021-06-04 21:40:29,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 224.0ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:40:29,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-06-04 21:40:29,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1931. [2021-06-04 21:40:29,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.704145077720207) internal successors, (5219), 1930 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:29,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-06-04 21:40:29,040 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-06-04 21:40:29,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:29,040 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-06-04 21:40:29,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:29,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-06-04 21:40:29,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-04 21:40:29,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:29,044 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-06-04 21:40:29,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:29,267 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:29,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:29,267 INFO L82 PathProgramCache]: Analyzing trace with hash -2073427979, now seen corresponding path program 13 times [2021-06-04 21:40:29,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:29,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490352198] [2021-06-04 21:40:29,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:29,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:29,356 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:29,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:29,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490352198] [2021-06-04 21:40:29,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490352198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:29,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274548204] [2021-06-04 21:40:29,357 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:29,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:29,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-04 21:40:29,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:29,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274548204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:29,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:29,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-04 21:40:29,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327844919] [2021-06-04 21:40:29,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-04 21:40:29,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:29,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-04 21:40:29,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-04 21:40:29,541 INFO L87 Difference]: Start difference. First operand 1931 states and 5219 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:29,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:29,784 INFO L93 Difference]: Finished difference Result 2496 states and 6477 transitions. [2021-06-04 21:40:29,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-04 21:40:29,785 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-04 21:40:29,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:29,788 INFO L225 Difference]: With dead ends: 2496 [2021-06-04 21:40:29,788 INFO L226 Difference]: Without dead ends: 2226 [2021-06-04 21:40:29,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 199.6ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:40:29,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-06-04 21:40:29,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1931. [2021-06-04 21:40:29,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.704145077720207) internal successors, (5219), 1930 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:29,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-06-04 21:40:29,817 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-06-04 21:40:29,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:29,817 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-06-04 21:40:29,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:29,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-06-04 21:40:29,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-04 21:40:29,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:29,820 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-06-04 21:40:30,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-04 21:40:30,046 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:30,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:30,046 INFO L82 PathProgramCache]: Analyzing trace with hash 506297029, now seen corresponding path program 14 times [2021-06-04 21:40:30,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:30,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873737370] [2021-06-04 21:40:30,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:30,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:30,143 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:30,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:30,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873737370] [2021-06-04 21:40:30,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873737370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:30,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768361527] [2021-06-04 21:40:30,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:30,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:40:30,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:30,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-04 21:40:30,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:30,329 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:30,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768361527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:30,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:30,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-04 21:40:30,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379416654] [2021-06-04 21:40:30,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:40:30,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:30,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:40:30,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:40:30,332 INFO L87 Difference]: Start difference. First operand 1931 states and 5219 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:30,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:30,678 INFO L93 Difference]: Finished difference Result 3074 states and 8103 transitions. [2021-06-04 21:40:30,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-04 21:40:30,678 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-04 21:40:30,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:30,681 INFO L225 Difference]: With dead ends: 3074 [2021-06-04 21:40:30,681 INFO L226 Difference]: Without dead ends: 2451 [2021-06-04 21:40:30,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 306.2ms TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:40:30,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-06-04 21:40:30,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1961. [2021-06-04 21:40:30,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1960 states have (on average 2.726530612244898) internal successors, (5344), 1960 states have internal predecessors, (5344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:30,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 5344 transitions. [2021-06-04 21:40:30,712 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 5344 transitions. Word has length 65 [2021-06-04 21:40:30,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:30,712 INFO L482 AbstractCegarLoop]: Abstraction has 1961 states and 5344 transitions. [2021-06-04 21:40:30,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:30,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 5344 transitions. [2021-06-04 21:40:30,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-04 21:40:30,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:30,715 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-06-04 21:40:30,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-04 21:40:30,929 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:30,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:30,929 INFO L82 PathProgramCache]: Analyzing trace with hash -526350573, now seen corresponding path program 15 times [2021-06-04 21:40:30,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:30,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096210851] [2021-06-04 21:40:30,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:30,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:31,080 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:31,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:31,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096210851] [2021-06-04 21:40:31,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096210851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:31,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366629924] [2021-06-04 21:40:31,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:31,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-04 21:40:31,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:31,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-04 21:40:31,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:31,268 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:31,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366629924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:31,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:31,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-04 21:40:31,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809527539] [2021-06-04 21:40:31,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-04 21:40:31,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:31,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-04 21:40:31,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-04 21:40:31,269 INFO L87 Difference]: Start difference. First operand 1961 states and 5344 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:31,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:31,510 INFO L93 Difference]: Finished difference Result 3278 states and 8771 transitions. [2021-06-04 21:40:31,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-04 21:40:31,510 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-04 21:40:31,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:31,513 INFO L225 Difference]: With dead ends: 3278 [2021-06-04 21:40:31,513 INFO L226 Difference]: Without dead ends: 3008 [2021-06-04 21:40:31,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 243.7ms TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:40:31,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-06-04 21:40:31,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 2141. [2021-06-04 21:40:31,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2141 states, 2140 states have (on average 2.758411214953271) internal successors, (5903), 2140 states have internal predecessors, (5903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:31,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2141 states to 2141 states and 5903 transitions. [2021-06-04 21:40:31,568 INFO L78 Accepts]: Start accepts. Automaton has 2141 states and 5903 transitions. Word has length 65 [2021-06-04 21:40:31,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:31,568 INFO L482 AbstractCegarLoop]: Abstraction has 2141 states and 5903 transitions. [2021-06-04 21:40:31,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:31,568 INFO L276 IsEmpty]: Start isEmpty. Operand 2141 states and 5903 transitions. [2021-06-04 21:40:31,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-04 21:40:31,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:31,571 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-06-04 21:40:31,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-04 21:40:31,781 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:31,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:31,781 INFO L82 PathProgramCache]: Analyzing trace with hash -504007323, now seen corresponding path program 16 times [2021-06-04 21:40:31,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:31,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495128255] [2021-06-04 21:40:31,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:31,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:31,868 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:31,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:31,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495128255] [2021-06-04 21:40:31,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495128255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:31,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761327472] [2021-06-04 21:40:31,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:31,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:40:31,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:31,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-04 21:40:31,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:32,053 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:32,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761327472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:32,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:32,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-04 21:40:32,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034961553] [2021-06-04 21:40:32,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:40:32,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:32,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:40:32,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:40:32,055 INFO L87 Difference]: Start difference. First operand 2141 states and 5903 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:32,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:32,443 INFO L93 Difference]: Finished difference Result 3221 states and 8631 transitions. [2021-06-04 21:40:32,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-04 21:40:32,443 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-04 21:40:32,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:32,446 INFO L225 Difference]: With dead ends: 3221 [2021-06-04 21:40:32,446 INFO L226 Difference]: Without dead ends: 2646 [2021-06-04 21:40:32,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 346.8ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:40:32,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-06-04 21:40:32,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2056. [2021-06-04 21:40:32,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2056 states, 2055 states have (on average 2.7343065693430657) internal successors, (5619), 2055 states have internal predecessors, (5619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:32,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 5619 transitions. [2021-06-04 21:40:32,470 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 5619 transitions. Word has length 65 [2021-06-04 21:40:32,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:32,470 INFO L482 AbstractCegarLoop]: Abstraction has 2056 states and 5619 transitions. [2021-06-04 21:40:32,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:32,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 5619 transitions. [2021-06-04 21:40:32,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-04 21:40:32,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:32,473 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-06-04 21:40:32,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-04 21:40:32,686 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:32,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:32,686 INFO L82 PathProgramCache]: Analyzing trace with hash 211164831, now seen corresponding path program 17 times [2021-06-04 21:40:32,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:32,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732674907] [2021-06-04 21:40:32,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:32,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:32,790 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-04 21:40:32,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:32,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732674907] [2021-06-04 21:40:32,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732674907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:32,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777456797] [2021-06-04 21:40:32,790 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:32,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-04 21:40:32,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:32,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-04 21:40:32,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:32,990 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-04 21:40:32,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777456797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:32,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:32,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-04 21:40:32,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600774989] [2021-06-04 21:40:32,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:40:32,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:32,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:40:32,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:40:32,991 INFO L87 Difference]: Start difference. First operand 2056 states and 5619 transitions. Second operand has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:33,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:33,215 INFO L93 Difference]: Finished difference Result 3061 states and 7949 transitions. [2021-06-04 21:40:33,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-04 21:40:33,215 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-04 21:40:33,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:33,218 INFO L225 Difference]: With dead ends: 3061 [2021-06-04 21:40:33,218 INFO L226 Difference]: Without dead ends: 2712 [2021-06-04 21:40:33,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 231.2ms TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:40:33,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-06-04 21:40:33,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2058. [2021-06-04 21:40:33,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2058 states, 2057 states have (on average 2.733592610597958) internal successors, (5623), 2057 states have internal predecessors, (5623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:33,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 5623 transitions. [2021-06-04 21:40:33,254 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 5623 transitions. Word has length 65 [2021-06-04 21:40:33,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:33,254 INFO L482 AbstractCegarLoop]: Abstraction has 2058 states and 5623 transitions. [2021-06-04 21:40:33,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:33,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 5623 transitions. [2021-06-04 21:40:33,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-04 21:40:33,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:33,258 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-06-04 21:40:33,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:33,480 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:33,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:33,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1649663653, now seen corresponding path program 18 times [2021-06-04 21:40:33,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:33,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433761614] [2021-06-04 21:40:33,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:33,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-04 21:40:33,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:33,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433761614] [2021-06-04 21:40:33,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433761614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:33,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067795116] [2021-06-04 21:40:33,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:33,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-04 21:40:33,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:33,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:40:33,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:33,769 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-04 21:40:33,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067795116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:33,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:33,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-04 21:40:33,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920806798] [2021-06-04 21:40:33,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-04 21:40:33,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:33,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-04 21:40:33,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-04 21:40:33,770 INFO L87 Difference]: Start difference. First operand 2058 states and 5623 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:33,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:33,910 INFO L93 Difference]: Finished difference Result 2861 states and 7357 transitions. [2021-06-04 21:40:33,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-04 21:40:33,910 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-04 21:40:33,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:33,913 INFO L225 Difference]: With dead ends: 2861 [2021-06-04 21:40:33,913 INFO L226 Difference]: Without dead ends: 2576 [2021-06-04 21:40:33,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 138.4ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:40:33,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2021-06-04 21:40:33,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 2038. [2021-06-04 21:40:33,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2038 states, 2037 states have (on average 2.74079528718704) internal successors, (5583), 2037 states have internal predecessors, (5583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:33,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2038 states to 2038 states and 5583 transitions. [2021-06-04 21:40:33,942 INFO L78 Accepts]: Start accepts. Automaton has 2038 states and 5583 transitions. Word has length 65 [2021-06-04 21:40:33,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:33,942 INFO L482 AbstractCegarLoop]: Abstraction has 2038 states and 5583 transitions. [2021-06-04 21:40:33,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:33,942 INFO L276 IsEmpty]: Start isEmpty. Operand 2038 states and 5583 transitions. [2021-06-04 21:40:33,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-04 21:40:33,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:33,945 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-06-04 21:40:34,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:34,167 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:34,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:34,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1345737589, now seen corresponding path program 19 times [2021-06-04 21:40:34,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:34,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602857592] [2021-06-04 21:40:34,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:34,272 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-04 21:40:34,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:34,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602857592] [2021-06-04 21:40:34,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602857592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:34,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941275184] [2021-06-04 21:40:34,273 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:34,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:34,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:40:34,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:34,464 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-04 21:40:34,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941275184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:34,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:34,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-04 21:40:34,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17742443] [2021-06-04 21:40:34,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-04 21:40:34,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:34,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-04 21:40:34,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-04 21:40:34,466 INFO L87 Difference]: Start difference. First operand 2038 states and 5583 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:34,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:34,672 INFO L93 Difference]: Finished difference Result 2796 states and 7227 transitions. [2021-06-04 21:40:34,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-04 21:40:34,672 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-04 21:40:34,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:34,675 INFO L225 Difference]: With dead ends: 2796 [2021-06-04 21:40:34,675 INFO L226 Difference]: Without dead ends: 2511 [2021-06-04 21:40:34,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 202.5ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:40:34,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2021-06-04 21:40:34,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2013. [2021-06-04 21:40:34,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2013 states, 2012 states have (on average 2.75) internal successors, (5533), 2012 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:34,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2013 states to 2013 states and 5533 transitions. [2021-06-04 21:40:34,704 INFO L78 Accepts]: Start accepts. Automaton has 2013 states and 5533 transitions. Word has length 65 [2021-06-04 21:40:34,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:34,704 INFO L482 AbstractCegarLoop]: Abstraction has 2013 states and 5533 transitions. [2021-06-04 21:40:34,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:34,704 INFO L276 IsEmpty]: Start isEmpty. Operand 2013 states and 5533 transitions. [2021-06-04 21:40:34,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-04 21:40:34,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:34,707 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-06-04 21:40:34,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-04 21:40:34,921 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:34,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:34,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1991900067, now seen corresponding path program 20 times [2021-06-04 21:40:34,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:34,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815640937] [2021-06-04 21:40:34,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:34,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:35,015 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-04 21:40:35,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:35,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815640937] [2021-06-04 21:40:35,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815640937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:35,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931619033] [2021-06-04 21:40:35,015 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:35,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:40:35,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:35,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:40:35,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:35,187 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-04 21:40:35,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931619033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:35,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:35,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-04 21:40:35,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083498746] [2021-06-04 21:40:35,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-04 21:40:35,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:35,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-04 21:40:35,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-04 21:40:35,189 INFO L87 Difference]: Start difference. First operand 2013 states and 5533 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:35,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:35,402 INFO L93 Difference]: Finished difference Result 2721 states and 7077 transitions. [2021-06-04 21:40:35,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-04 21:40:35,403 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-04 21:40:35,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:35,406 INFO L225 Difference]: With dead ends: 2721 [2021-06-04 21:40:35,406 INFO L226 Difference]: Without dead ends: 2436 [2021-06-04 21:40:35,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 197.1ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:40:35,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-06-04 21:40:35,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 1988. [2021-06-04 21:40:35,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 2.7594363361852037) internal successors, (5483), 1987 states have internal predecessors, (5483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:35,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 5483 transitions. [2021-06-04 21:40:35,431 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 5483 transitions. Word has length 65 [2021-06-04 21:40:35,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:35,431 INFO L482 AbstractCegarLoop]: Abstraction has 1988 states and 5483 transitions. [2021-06-04 21:40:35,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:35,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 5483 transitions. [2021-06-04 21:40:35,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-04 21:40:35,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:35,434 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-06-04 21:40:35,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:35,644 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:35,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:35,645 INFO L82 PathProgramCache]: Analyzing trace with hash 596560781, now seen corresponding path program 21 times [2021-06-04 21:40:35,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:35,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552073054] [2021-06-04 21:40:35,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:35,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:35,786 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-04 21:40:35,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:35,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552073054] [2021-06-04 21:40:35,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552073054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:35,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555033250] [2021-06-04 21:40:35,786 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:35,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-04 21:40:35,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:35,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:40:35,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:35,998 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-04 21:40:35,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555033250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:35,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:35,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-04 21:40:35,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454937234] [2021-06-04 21:40:35,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-04 21:40:35,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:35,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-04 21:40:35,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-04 21:40:35,999 INFO L87 Difference]: Start difference. First operand 1988 states and 5483 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:36,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:36,242 INFO L93 Difference]: Finished difference Result 2646 states and 6927 transitions. [2021-06-04 21:40:36,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-04 21:40:36,243 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-04 21:40:36,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:36,245 INFO L225 Difference]: With dead ends: 2646 [2021-06-04 21:40:36,245 INFO L226 Difference]: Without dead ends: 2361 [2021-06-04 21:40:36,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 229.4ms TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:40:36,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-06-04 21:40:36,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 1963. [2021-06-04 21:40:36,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 2.7691131498470947) internal successors, (5433), 1962 states have internal predecessors, (5433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:36,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 5433 transitions. [2021-06-04 21:40:36,267 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 5433 transitions. Word has length 65 [2021-06-04 21:40:36,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:36,267 INFO L482 AbstractCegarLoop]: Abstraction has 1963 states and 5433 transitions. [2021-06-04 21:40:36,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:36,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 5433 transitions. [2021-06-04 21:40:36,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-04 21:40:36,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:36,269 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-06-04 21:40:36,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-04 21:40:36,472 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:36,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:36,472 INFO L82 PathProgramCache]: Analyzing trace with hash 797376750, now seen corresponding path program 22 times [2021-06-04 21:40:36,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:36,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076273987] [2021-06-04 21:40:36,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:36,551 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:36,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:36,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076273987] [2021-06-04 21:40:36,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076273987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:36,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627505710] [2021-06-04 21:40:36,552 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:36,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:40:36,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:36,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-04 21:40:36,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:36,733 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:36,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627505710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:36,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:36,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-04 21:40:36,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501911501] [2021-06-04 21:40:36,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-04 21:40:36,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:36,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-04 21:40:36,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-04 21:40:36,734 INFO L87 Difference]: Start difference. First operand 1963 states and 5433 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:36,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:36,977 INFO L93 Difference]: Finished difference Result 3055 states and 8279 transitions. [2021-06-04 21:40:36,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-04 21:40:36,978 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-04 21:40:36,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:36,980 INFO L225 Difference]: With dead ends: 3055 [2021-06-04 21:40:36,980 INFO L226 Difference]: Without dead ends: 2446 [2021-06-04 21:40:36,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 222.2ms TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:40:36,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2021-06-04 21:40:36,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2028. [2021-06-04 21:40:37,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.8036507153428714) internal successors, (5683), 2027 states have internal predecessors, (5683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:37,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5683 transitions. [2021-06-04 21:40:37,002 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5683 transitions. Word has length 65 [2021-06-04 21:40:37,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:37,002 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5683 transitions. [2021-06-04 21:40:37,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:37,003 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5683 transitions. [2021-06-04 21:40:37,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:40:37,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:37,005 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-06-04 21:40:37,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-04 21:40:37,209 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:37,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:37,210 INFO L82 PathProgramCache]: Analyzing trace with hash 2053970119, now seen corresponding path program 23 times [2021-06-04 21:40:37,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:37,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220086403] [2021-06-04 21:40:37,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:37,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:37,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:37,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220086403] [2021-06-04 21:40:37,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220086403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:37,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118954996] [2021-06-04 21:40:37,321 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:37,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-04 21:40:37,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:37,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:40:37,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:37,557 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:37,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118954996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:37,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:37,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2021-06-04 21:40:37,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797302075] [2021-06-04 21:40:37,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:40:37,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:37,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:40:37,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:40:37,559 INFO L87 Difference]: Start difference. First operand 2028 states and 5683 transitions. Second operand has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:37,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:37,782 INFO L93 Difference]: Finished difference Result 2868 states and 7683 transitions. [2021-06-04 21:40:37,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-04 21:40:37,782 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-04 21:40:37,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:37,785 INFO L225 Difference]: With dead ends: 2868 [2021-06-04 21:40:37,785 INFO L226 Difference]: Without dead ends: 2534 [2021-06-04 21:40:37,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 241.8ms TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:40:37,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-06-04 21:40:37,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 2113. [2021-06-04 21:40:37,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 2.7713068181818183) internal successors, (5853), 2112 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:37,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 5853 transitions. [2021-06-04 21:40:37,811 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 5853 transitions. Word has length 70 [2021-06-04 21:40:37,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:37,811 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 5853 transitions. [2021-06-04 21:40:37,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:37,811 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 5853 transitions. [2021-06-04 21:40:37,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:40:37,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:37,814 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-06-04 21:40:38,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-04 21:40:38,017 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:38,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:38,018 INFO L82 PathProgramCache]: Analyzing trace with hash -778605685, now seen corresponding path program 24 times [2021-06-04 21:40:38,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:38,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171027027] [2021-06-04 21:40:38,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:38,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:38,200 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:38,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:38,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171027027] [2021-06-04 21:40:38,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171027027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:38,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233807396] [2021-06-04 21:40:38,200 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:38,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-04 21:40:38,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:38,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-04 21:40:38,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:38,381 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:38,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233807396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:38,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:38,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-04 21:40:38,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006959622] [2021-06-04 21:40:38,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:40:38,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:38,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:40:38,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:40:38,383 INFO L87 Difference]: Start difference. First operand 2113 states and 5853 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:38,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:38,562 INFO L93 Difference]: Finished difference Result 3061 states and 7877 transitions. [2021-06-04 21:40:38,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-04 21:40:38,563 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-04 21:40:38,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:38,566 INFO L225 Difference]: With dead ends: 3061 [2021-06-04 21:40:38,567 INFO L226 Difference]: Without dead ends: 2791 [2021-06-04 21:40:38,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 190.9ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:40:38,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-06-04 21:40:38,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 2128. [2021-06-04 21:40:38,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.765867418899859) internal successors, (5883), 2127 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:38,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-06-04 21:40:38,600 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-06-04 21:40:38,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:38,600 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-06-04 21:40:38,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:38,600 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-06-04 21:40:38,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:40:38,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:38,603 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-06-04 21:40:38,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-04 21:40:38,826 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:38,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:38,827 INFO L82 PathProgramCache]: Analyzing trace with hash 220290651, now seen corresponding path program 25 times [2021-06-04 21:40:38,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:38,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595113625] [2021-06-04 21:40:38,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:38,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:38,935 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:38,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:38,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595113625] [2021-06-04 21:40:38,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595113625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:38,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468145501] [2021-06-04 21:40:38,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:38,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:38,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-04 21:40:38,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:39,114 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:39,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468145501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:39,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:39,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-04 21:40:39,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53851478] [2021-06-04 21:40:39,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:40:39,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:39,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:40:39,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:40:39,115 INFO L87 Difference]: Start difference. First operand 2128 states and 5883 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:39,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:39,346 INFO L93 Difference]: Finished difference Result 2946 states and 7647 transitions. [2021-06-04 21:40:39,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-04 21:40:39,346 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-04 21:40:39,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:39,349 INFO L225 Difference]: With dead ends: 2946 [2021-06-04 21:40:39,349 INFO L226 Difference]: Without dead ends: 2676 [2021-06-04 21:40:39,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 233.6ms TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:40:39,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2021-06-04 21:40:39,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 2128. [2021-06-04 21:40:39,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.765867418899859) internal successors, (5883), 2127 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:39,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-06-04 21:40:39,394 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-06-04 21:40:39,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:39,394 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-06-04 21:40:39,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:39,395 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-06-04 21:40:39,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:40:39,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:39,397 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-06-04 21:40:39,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-04 21:40:39,598 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:39,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:39,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1659037239, now seen corresponding path program 26 times [2021-06-04 21:40:39,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:39,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94840935] [2021-06-04 21:40:39,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:39,702 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:39,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:39,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94840935] [2021-06-04 21:40:39,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94840935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:39,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862167380] [2021-06-04 21:40:39,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:39,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:40:39,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:39,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-04 21:40:39,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:39,891 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:39,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862167380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:39,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:39,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-04 21:40:39,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424280316] [2021-06-04 21:40:39,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:40:39,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:39,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:40:39,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:40:39,893 INFO L87 Difference]: Start difference. First operand 2128 states and 5883 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:40,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:40,080 INFO L93 Difference]: Finished difference Result 2921 states and 7597 transitions. [2021-06-04 21:40:40,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-04 21:40:40,080 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-04 21:40:40,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:40,083 INFO L225 Difference]: With dead ends: 2921 [2021-06-04 21:40:40,083 INFO L226 Difference]: Without dead ends: 2651 [2021-06-04 21:40:40,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 186.3ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:40:40,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2021-06-04 21:40:40,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2128. [2021-06-04 21:40:40,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.765867418899859) internal successors, (5883), 2127 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:40,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-06-04 21:40:40,109 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-06-04 21:40:40,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:40,109 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-06-04 21:40:40,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:40,109 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-06-04 21:40:40,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:40:40,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:40,111 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-06-04 21:40:40,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:40,325 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:40,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:40,325 INFO L82 PathProgramCache]: Analyzing trace with hash 371282073, now seen corresponding path program 27 times [2021-06-04 21:40:40,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:40,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290366888] [2021-06-04 21:40:40,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:40,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:40,418 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:40,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:40,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290366888] [2021-06-04 21:40:40,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290366888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:40,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962588040] [2021-06-04 21:40:40,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:40,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-04 21:40:40,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:40,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-04 21:40:40,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:40,601 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:40,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962588040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:40,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:40,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-04 21:40:40,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027401271] [2021-06-04 21:40:40,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:40:40,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:40,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:40:40,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:40:40,604 INFO L87 Difference]: Start difference. First operand 2128 states and 5883 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:40,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:40,893 INFO L93 Difference]: Finished difference Result 2871 states and 7497 transitions. [2021-06-04 21:40:40,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-04 21:40:40,894 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-04 21:40:40,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:40,896 INFO L225 Difference]: With dead ends: 2871 [2021-06-04 21:40:40,896 INFO L226 Difference]: Without dead ends: 2601 [2021-06-04 21:40:40,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 274.9ms TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:40:40,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-06-04 21:40:40,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2128. [2021-06-04 21:40:40,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.765867418899859) internal successors, (5883), 2127 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:40,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-06-04 21:40:40,926 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-06-04 21:40:40,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:40,926 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-06-04 21:40:40,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:40,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-06-04 21:40:40,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:40:40,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:40,929 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-06-04 21:40:41,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:41,145 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:41,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:41,145 INFO L82 PathProgramCache]: Analyzing trace with hash 985521543, now seen corresponding path program 28 times [2021-06-04 21:40:41,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:41,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649625387] [2021-06-04 21:40:41,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:41,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:41,237 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:41,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:41,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649625387] [2021-06-04 21:40:41,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649625387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:41,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065460150] [2021-06-04 21:40:41,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:41,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:40:41,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:41,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-04 21:40:41,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:41,475 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:41,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065460150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:41,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:41,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-04 21:40:41,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832768873] [2021-06-04 21:40:41,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:40:41,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:41,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:40:41,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:40:41,477 INFO L87 Difference]: Start difference. First operand 2128 states and 5883 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:41,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:41,719 INFO L93 Difference]: Finished difference Result 2821 states and 7397 transitions. [2021-06-04 21:40:41,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-04 21:40:41,720 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-04 21:40:41,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:41,722 INFO L225 Difference]: With dead ends: 2821 [2021-06-04 21:40:41,722 INFO L226 Difference]: Without dead ends: 2551 [2021-06-04 21:40:41,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 221.1ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:40:41,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2551 states. [2021-06-04 21:40:41,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2551 to 2128. [2021-06-04 21:40:41,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.765867418899859) internal successors, (5883), 2127 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:41,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-06-04 21:40:41,754 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-06-04 21:40:41,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:41,754 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-06-04 21:40:41,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:41,754 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-06-04 21:40:41,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:40:41,756 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:41,756 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-06-04 21:40:41,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-04 21:40:41,957 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:41,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:41,957 INFO L82 PathProgramCache]: Analyzing trace with hash -729720745, now seen corresponding path program 29 times [2021-06-04 21:40:41,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:41,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308606476] [2021-06-04 21:40:41,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:41,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:42,065 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:42,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:42,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308606476] [2021-06-04 21:40:42,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308606476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:42,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655750914] [2021-06-04 21:40:42,066 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:42,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-04 21:40:42,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:42,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-04 21:40:42,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:42,286 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:42,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655750914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:42,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:42,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-04 21:40:42,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491380786] [2021-06-04 21:40:42,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:40:42,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:42,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:40:42,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:40:42,287 INFO L87 Difference]: Start difference. First operand 2128 states and 5883 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:42,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:42,632 INFO L93 Difference]: Finished difference Result 2831 states and 7447 transitions. [2021-06-04 21:40:42,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-04 21:40:42,632 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-04 21:40:42,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:42,635 INFO L225 Difference]: With dead ends: 2831 [2021-06-04 21:40:42,635 INFO L226 Difference]: Without dead ends: 2561 [2021-06-04 21:40:42,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 332.3ms TimeCoverageRelationStatistics Valid=267, Invalid=789, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:40:42,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2561 states. [2021-06-04 21:40:42,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2561 to 2128. [2021-06-04 21:40:42,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.768218147625764) internal successors, (5888), 2127 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:42,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5888 transitions. [2021-06-04 21:40:42,659 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5888 transitions. Word has length 70 [2021-06-04 21:40:42,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:42,659 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5888 transitions. [2021-06-04 21:40:42,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:42,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5888 transitions. [2021-06-04 21:40:42,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:40:42,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:42,661 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-06-04 21:40:42,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:42,862 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:42,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:42,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1762368347, now seen corresponding path program 30 times [2021-06-04 21:40:42,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:42,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287874895] [2021-06-04 21:40:42,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:42,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:42,942 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:42,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:42,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287874895] [2021-06-04 21:40:42,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287874895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:42,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434888267] [2021-06-04 21:40:42,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:43,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-04 21:40:43,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:43,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-04 21:40:43,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:43,137 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:43,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434888267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:43,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:43,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-04 21:40:43,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027502027] [2021-06-04 21:40:43,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:40:43,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:43,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:40:43,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:40:43,138 INFO L87 Difference]: Start difference. First operand 2128 states and 5888 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:43,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:43,405 INFO L93 Difference]: Finished difference Result 3598 states and 9621 transitions. [2021-06-04 21:40:43,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-04 21:40:43,405 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-04 21:40:43,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:43,409 INFO L225 Difference]: With dead ends: 3598 [2021-06-04 21:40:43,409 INFO L226 Difference]: Without dead ends: 3328 [2021-06-04 21:40:43,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 238.4ms TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:40:43,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2021-06-04 21:40:43,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 2308. [2021-06-04 21:40:43,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2308 states, 2307 states have (on average 2.7945383615084527) internal successors, (6447), 2307 states have internal predecessors, (6447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:43,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2308 states to 2308 states and 6447 transitions. [2021-06-04 21:40:43,446 INFO L78 Accepts]: Start accepts. Automaton has 2308 states and 6447 transitions. Word has length 70 [2021-06-04 21:40:43,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:43,446 INFO L482 AbstractCegarLoop]: Abstraction has 2308 states and 6447 transitions. [2021-06-04 21:40:43,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:43,446 INFO L276 IsEmpty]: Start isEmpty. Operand 2308 states and 6447 transitions. [2021-06-04 21:40:43,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:40:43,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:43,449 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-06-04 21:40:43,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-04 21:40:43,665 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:43,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:43,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1740025097, now seen corresponding path program 31 times [2021-06-04 21:40:43,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:43,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898768648] [2021-06-04 21:40:43,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:43,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:43,746 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:43,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:43,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898768648] [2021-06-04 21:40:43,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898768648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:43,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470158837] [2021-06-04 21:40:43,746 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:43,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:43,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-04 21:40:43,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:43,945 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:43,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470158837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:43,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:43,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-04 21:40:43,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891669759] [2021-06-04 21:40:43,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:40:43,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:43,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:40:43,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:40:43,946 INFO L87 Difference]: Start difference. First operand 2308 states and 6447 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:44,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:44,349 INFO L93 Difference]: Finished difference Result 3421 states and 9121 transitions. [2021-06-04 21:40:44,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-04 21:40:44,349 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-04 21:40:44,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:44,352 INFO L225 Difference]: With dead ends: 3421 [2021-06-04 21:40:44,352 INFO L226 Difference]: Without dead ends: 2846 [2021-06-04 21:40:44,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 368.4ms TimeCoverageRelationStatistics Valid=357, Invalid=1049, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:40:44,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2021-06-04 21:40:44,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 1803. [2021-06-04 21:40:44,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1802 states have (on average 2.7291897891231964) internal successors, (4918), 1802 states have internal predecessors, (4918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:44,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 4918 transitions. [2021-06-04 21:40:44,379 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 4918 transitions. Word has length 70 [2021-06-04 21:40:44,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:44,379 INFO L482 AbstractCegarLoop]: Abstraction has 1803 states and 4918 transitions. [2021-06-04 21:40:44,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:44,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 4918 transitions. [2021-06-04 21:40:44,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-04 21:40:44,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:44,382 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:44,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:44,584 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:44,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:44,584 INFO L82 PathProgramCache]: Analyzing trace with hash 751678088, now seen corresponding path program 32 times [2021-06-04 21:40:44,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:44,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834225340] [2021-06-04 21:40:44,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:44,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:44,691 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:44,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:44,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834225340] [2021-06-04 21:40:44,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834225340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:44,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003183684] [2021-06-04 21:40:44,692 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:44,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:40:44,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:44,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:40:44,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:44,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003183684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:44,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:44,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-04 21:40:44,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257877482] [2021-06-04 21:40:44,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:40:44,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:44,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:40:44,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:40:44,885 INFO L87 Difference]: Start difference. First operand 1803 states and 4918 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:45,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:45,093 INFO L93 Difference]: Finished difference Result 2621 states and 6757 transitions. [2021-06-04 21:40:45,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-04 21:40:45,093 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-04 21:40:45,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:45,096 INFO L225 Difference]: With dead ends: 2621 [2021-06-04 21:40:45,096 INFO L226 Difference]: Without dead ends: 2351 [2021-06-04 21:40:45,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 205.9ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:40:45,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-06-04 21:40:45,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1878. [2021-06-04 21:40:45,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1877 states have (on average 2.7400106553010124) internal successors, (5143), 1877 states have internal predecessors, (5143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:45,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 5143 transitions. [2021-06-04 21:40:45,114 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 5143 transitions. Word has length 75 [2021-06-04 21:40:45,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:45,114 INFO L482 AbstractCegarLoop]: Abstraction has 1878 states and 5143 transitions. [2021-06-04 21:40:45,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:45,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 5143 transitions. [2021-06-04 21:40:45,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-04 21:40:45,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:45,117 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:45,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-04 21:40:45,325 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:45,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:45,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1750574424, now seen corresponding path program 33 times [2021-06-04 21:40:45,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:45,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175461187] [2021-06-04 21:40:45,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:45,432 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:45,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:45,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175461187] [2021-06-04 21:40:45,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175461187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:45,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879915154] [2021-06-04 21:40:45,433 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:45,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-04 21:40:45,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:45,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:40:45,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:45,642 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:45,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879915154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:45,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:45,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-04 21:40:45,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362890843] [2021-06-04 21:40:45,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:40:45,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:45,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:40:45,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:40:45,643 INFO L87 Difference]: Start difference. First operand 1878 states and 5143 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:45,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:45,899 INFO L93 Difference]: Finished difference Result 2841 states and 7272 transitions. [2021-06-04 21:40:45,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-04 21:40:45,900 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-04 21:40:45,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:45,902 INFO L225 Difference]: With dead ends: 2841 [2021-06-04 21:40:45,902 INFO L226 Difference]: Without dead ends: 2571 [2021-06-04 21:40:45,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 282.5ms TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:40:45,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-06-04 21:40:45,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 1953. [2021-06-04 21:40:45,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 2.75) internal successors, (5368), 1952 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:45,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 5368 transitions. [2021-06-04 21:40:45,936 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 5368 transitions. Word has length 75 [2021-06-04 21:40:45,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:45,936 INFO L482 AbstractCegarLoop]: Abstraction has 1953 states and 5368 transitions. [2021-06-04 21:40:45,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:45,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 5368 transitions. [2021-06-04 21:40:45,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-04 21:40:45,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:45,939 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:46,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-04 21:40:46,140 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:46,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:46,140 INFO L82 PathProgramCache]: Analyzing trace with hash -128753466, now seen corresponding path program 34 times [2021-06-04 21:40:46,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:46,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697007810] [2021-06-04 21:40:46,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:46,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:46,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:46,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697007810] [2021-06-04 21:40:46,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697007810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:46,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826521184] [2021-06-04 21:40:46,247 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:46,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:40:46,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:46,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:40:46,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:46,444 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:46,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826521184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:46,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:46,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-04 21:40:46,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823378151] [2021-06-04 21:40:46,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:40:46,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:46,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:40:46,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:40:46,446 INFO L87 Difference]: Start difference. First operand 1953 states and 5368 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:46,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:46,715 INFO L93 Difference]: Finished difference Result 2871 states and 7407 transitions. [2021-06-04 21:40:46,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-04 21:40:46,715 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-04 21:40:46,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:46,719 INFO L225 Difference]: With dead ends: 2871 [2021-06-04 21:40:46,719 INFO L226 Difference]: Without dead ends: 2601 [2021-06-04 21:40:46,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 258.6ms TimeCoverageRelationStatistics Valid=248, Invalid=744, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:40:46,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-06-04 21:40:46,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2028. [2021-06-04 21:40:46,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.759250123334978) internal successors, (5593), 2027 states have internal predecessors, (5593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:46,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5593 transitions. [2021-06-04 21:40:46,746 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5593 transitions. Word has length 75 [2021-06-04 21:40:46,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:46,747 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5593 transitions. [2021-06-04 21:40:46,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:46,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5593 transitions. [2021-06-04 21:40:46,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-04 21:40:46,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:46,749 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:46,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-04 21:40:46,965 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:46,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:46,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1901565846, now seen corresponding path program 35 times [2021-06-04 21:40:46,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:46,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961049751] [2021-06-04 21:40:46,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:47,064 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:47,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:47,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961049751] [2021-06-04 21:40:47,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961049751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:47,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431155824] [2021-06-04 21:40:47,065 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:47,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-04 21:40:47,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:47,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:40:47,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:47,233 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:47,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431155824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:47,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:47,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-04 21:40:47,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84930652] [2021-06-04 21:40:47,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:40:47,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:47,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:40:47,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:40:47,234 INFO L87 Difference]: Start difference. First operand 2028 states and 5593 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:47,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:47,546 INFO L93 Difference]: Finished difference Result 2896 states and 7532 transitions. [2021-06-04 21:40:47,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-04 21:40:47,547 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-04 21:40:47,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:47,549 INFO L225 Difference]: With dead ends: 2896 [2021-06-04 21:40:47,549 INFO L226 Difference]: Without dead ends: 2626 [2021-06-04 21:40:47,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 300.5ms TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:40:47,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-06-04 21:40:47,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 2103. [2021-06-04 21:40:47,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2103 states, 2102 states have (on average 2.7678401522359657) internal successors, (5818), 2102 states have internal predecessors, (5818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:47,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 5818 transitions. [2021-06-04 21:40:47,571 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 5818 transitions. Word has length 75 [2021-06-04 21:40:47,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:47,571 INFO L482 AbstractCegarLoop]: Abstraction has 2103 states and 5818 transitions. [2021-06-04 21:40:47,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:47,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 5818 transitions. [2021-06-04 21:40:47,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-04 21:40:47,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:47,573 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:47,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-04 21:40:47,774 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:47,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:47,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1779161980, now seen corresponding path program 36 times [2021-06-04 21:40:47,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:47,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173269173] [2021-06-04 21:40:47,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:47,870 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:47,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:47,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173269173] [2021-06-04 21:40:47,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173269173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:47,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240354431] [2021-06-04 21:40:47,870 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 [2021-06-04 21:40:47,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-04 21:40:47,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:47,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:40:47,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:48,037 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:48,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240354431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:48,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:48,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-04 21:40:48,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584489999] [2021-06-04 21:40:48,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:40:48,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:48,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:40:48,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:40:48,038 INFO L87 Difference]: Start difference. First operand 2103 states and 5818 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:48,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:48,318 INFO L93 Difference]: Finished difference Result 2966 states and 7777 transitions. [2021-06-04 21:40:48,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-04 21:40:48,319 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-04 21:40:48,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:48,321 INFO L225 Difference]: With dead ends: 2966 [2021-06-04 21:40:48,321 INFO L226 Difference]: Without dead ends: 2696 [2021-06-04 21:40:48,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 262.0ms TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:40:48,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-06-04 21:40:48,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2178. [2021-06-04 21:40:48,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2178 states, 2177 states have (on average 2.782728525493799) internal successors, (6058), 2177 states have internal predecessors, (6058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:48,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 6058 transitions. [2021-06-04 21:40:48,344 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 6058 transitions. Word has length 75 [2021-06-04 21:40:48,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:48,344 INFO L482 AbstractCegarLoop]: Abstraction has 2178 states and 6058 transitions. [2021-06-04 21:40:48,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:48,344 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 6058 transitions. [2021-06-04 21:40:48,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-04 21:40:48,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:48,347 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:48,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:48,553 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:48,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:48,553 INFO L82 PathProgramCache]: Analyzing trace with hash 800563028, now seen corresponding path program 37 times [2021-06-04 21:40:48,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:48,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586404090] [2021-06-04 21:40:48,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:48,655 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:48,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:48,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586404090] [2021-06-04 21:40:48,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586404090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:48,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562323189] [2021-06-04 21:40:48,656 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 [2021-06-04 21:40:48,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:48,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:40:48,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:48,821 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:48,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562323189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:48,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:48,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-04 21:40:48,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565757882] [2021-06-04 21:40:48,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:40:48,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:48,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:40:48,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:40:48,822 INFO L87 Difference]: Start difference. First operand 2178 states and 6058 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:49,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:49,238 INFO L93 Difference]: Finished difference Result 3544 states and 9403 transitions. [2021-06-04 21:40:49,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:40:49,238 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-04 21:40:49,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:49,241 INFO L225 Difference]: With dead ends: 3544 [2021-06-04 21:40:49,241 INFO L226 Difference]: Without dead ends: 2921 [2021-06-04 21:40:49,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 368.2ms TimeCoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:40:49,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-06-04 21:40:49,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2253. [2021-06-04 21:40:49,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7921847246891653) internal successors, (6288), 2252 states have internal predecessors, (6288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:49,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6288 transitions. [2021-06-04 21:40:49,268 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6288 transitions. Word has length 75 [2021-06-04 21:40:49,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:49,268 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6288 transitions. [2021-06-04 21:40:49,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:49,268 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6288 transitions. [2021-06-04 21:40:49,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-04 21:40:49,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:49,270 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:49,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:49,488 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:49,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:49,489 INFO L82 PathProgramCache]: Analyzing trace with hash -232084574, now seen corresponding path program 38 times [2021-06-04 21:40:49,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:49,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857555430] [2021-06-04 21:40:49,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:49,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:49,580 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:49,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:49,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857555430] [2021-06-04 21:40:49,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857555430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:49,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133072559] [2021-06-04 21:40:49,581 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 [2021-06-04 21:40:49,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:40:49,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:49,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:40:49,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:49,730 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:49,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133072559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:49,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:49,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-04 21:40:49,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069047554] [2021-06-04 21:40:49,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:40:49,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:49,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:40:49,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:40:49,731 INFO L87 Difference]: Start difference. First operand 2253 states and 6288 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:50,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:50,024 INFO L93 Difference]: Finished difference Result 3748 states and 10071 transitions. [2021-06-04 21:40:50,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-04 21:40:50,024 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-04 21:40:50,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:50,028 INFO L225 Difference]: With dead ends: 3748 [2021-06-04 21:40:50,028 INFO L226 Difference]: Without dead ends: 3478 [2021-06-04 21:40:50,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 257.9ms TimeCoverageRelationStatistics Valid=355, Invalid=905, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:40:50,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2021-06-04 21:40:50,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 2433. [2021-06-04 21:40:50,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2433 states, 2432 states have (on average 2.815378289473684) internal successors, (6847), 2432 states have internal predecessors, (6847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:50,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 6847 transitions. [2021-06-04 21:40:50,055 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 6847 transitions. Word has length 75 [2021-06-04 21:40:50,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:50,055 INFO L482 AbstractCegarLoop]: Abstraction has 2433 states and 6847 transitions. [2021-06-04 21:40:50,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:50,055 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 6847 transitions. [2021-06-04 21:40:50,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-04 21:40:50,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:50,057 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:40:50,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:50,257 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:50,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:50,258 INFO L82 PathProgramCache]: Analyzing trace with hash -209741324, now seen corresponding path program 39 times [2021-06-04 21:40:50,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:50,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526361435] [2021-06-04 21:40:50,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:50,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:50,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:50,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526361435] [2021-06-04 21:40:50,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526361435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:50,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562991601] [2021-06-04 21:40:50,350 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 [2021-06-04 21:40:50,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-04 21:40:50,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:50,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:40:50,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:50,558 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:50,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562991601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:50,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:50,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-04 21:40:50,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321384793] [2021-06-04 21:40:50,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:40:50,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:50,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:40:50,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:40:50,560 INFO L87 Difference]: Start difference. First operand 2433 states and 6847 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:50,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:50,946 INFO L93 Difference]: Finished difference Result 3210 states and 8721 transitions. [2021-06-04 21:40:50,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-04 21:40:50,947 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-04 21:40:50,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:50,949 INFO L225 Difference]: With dead ends: 3210 [2021-06-04 21:40:50,949 INFO L226 Difference]: Without dead ends: 2721 [2021-06-04 21:40:50,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 353.1ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:40:50,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2021-06-04 21:40:50,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2378. [2021-06-04 21:40:50,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.8115271350441735) internal successors, (6683), 2377 states have internal predecessors, (6683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:50,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6683 transitions. [2021-06-04 21:40:50,971 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6683 transitions. Word has length 75 [2021-06-04 21:40:50,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:50,971 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6683 transitions. [2021-06-04 21:40:50,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:50,971 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6683 transitions. [2021-06-04 21:40:50,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:40:50,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:50,973 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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] [2021-06-04 21:40:51,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:51,174 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:51,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:51,174 INFO L82 PathProgramCache]: Analyzing trace with hash 452139800, now seen corresponding path program 40 times [2021-06-04 21:40:51,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:51,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142084936] [2021-06-04 21:40:51,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:51,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:51,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142084936] [2021-06-04 21:40:51,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142084936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:51,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567546529] [2021-06-04 21:40:51,295 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 [2021-06-04 21:40:51,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:40:51,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:51,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-04 21:40:51,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:51,481 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:51,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567546529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:51,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:51,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-04 21:40:51,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930010761] [2021-06-04 21:40:51,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:40:51,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:51,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:40:51,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:40:51,482 INFO L87 Difference]: Start difference. First operand 2378 states and 6683 transitions. Second operand has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:51,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:51,751 INFO L93 Difference]: Finished difference Result 2948 states and 7951 transitions. [2021-06-04 21:40:51,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-04 21:40:51,751 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-04 21:40:51,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:51,754 INFO L225 Difference]: With dead ends: 2948 [2021-06-04 21:40:51,754 INFO L226 Difference]: Without dead ends: 2678 [2021-06-04 21:40:51,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 267.7ms TimeCoverageRelationStatistics Valid=260, Invalid=732, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:40:51,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2678 states. [2021-06-04 21:40:51,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2678 to 2463. [2021-06-04 21:40:51,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 2462 states have (on average 2.7835093419983754) internal successors, (6853), 2462 states have internal predecessors, (6853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:51,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 6853 transitions. [2021-06-04 21:40:51,777 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 6853 transitions. Word has length 80 [2021-06-04 21:40:51,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:51,778 INFO L482 AbstractCegarLoop]: Abstraction has 2463 states and 6853 transitions. [2021-06-04 21:40:51,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:51,778 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 6853 transitions. [2021-06-04 21:40:51,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:40:51,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:51,780 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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] [2021-06-04 21:40:51,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-04 21:40:51,980 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:51,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:51,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1173866716, now seen corresponding path program 41 times [2021-06-04 21:40:51,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:51,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328964593] [2021-06-04 21:40:51,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:51,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:52,128 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:52,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:52,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328964593] [2021-06-04 21:40:52,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328964593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:52,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845079820] [2021-06-04 21:40:52,128 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 [2021-06-04 21:40:52,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-04 21:40:52,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:52,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:40:52,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:52,295 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:52,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845079820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:52,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:52,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-04 21:40:52,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427524856] [2021-06-04 21:40:52,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:40:52,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:52,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:40:52,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:40:52,296 INFO L87 Difference]: Start difference. First operand 2463 states and 6853 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:52,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:52,489 INFO L93 Difference]: Finished difference Result 3561 states and 9177 transitions. [2021-06-04 21:40:52,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-04 21:40:52,489 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-04 21:40:52,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:52,492 INFO L225 Difference]: With dead ends: 3561 [2021-06-04 21:40:52,492 INFO L226 Difference]: Without dead ends: 3291 [2021-06-04 21:40:52,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 238.3ms TimeCoverageRelationStatistics Valid=196, Invalid=560, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:40:52,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3291 states. [2021-06-04 21:40:52,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3291 to 2478. [2021-06-04 21:40:52,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:52,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-04 21:40:52,516 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-04 21:40:52,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:52,517 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-04 21:40:52,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:52,517 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-04 21:40:52,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:40:52,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:52,519 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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] [2021-06-04 21:40:52,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:52,742 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:52,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:52,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1794345044, now seen corresponding path program 42 times [2021-06-04 21:40:52,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:52,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872526738] [2021-06-04 21:40:52,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:52,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:52,866 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:52,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:52,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872526738] [2021-06-04 21:40:52,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872526738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:52,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616917047] [2021-06-04 21:40:52,867 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 [2021-06-04 21:40:52,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-04 21:40:52,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:52,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:40:52,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:53,074 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:53,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616917047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:53,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:53,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-04 21:40:53,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207087177] [2021-06-04 21:40:53,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:40:53,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:53,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:40:53,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:40:53,076 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:53,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:53,348 INFO L93 Difference]: Finished difference Result 3446 states and 8947 transitions. [2021-06-04 21:40:53,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-04 21:40:53,349 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-04 21:40:53,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:53,353 INFO L225 Difference]: With dead ends: 3446 [2021-06-04 21:40:53,353 INFO L226 Difference]: Without dead ends: 3176 [2021-06-04 21:40:53,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 282.4ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:40:53,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-06-04 21:40:53,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2478. [2021-06-04 21:40:53,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:53,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-04 21:40:53,384 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-04 21:40:53,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:53,384 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-04 21:40:53,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:53,384 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-04 21:40:53,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:40:53,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:53,387 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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] [2021-06-04 21:40:53,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-04 21:40:53,593 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:53,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:53,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1340128870, now seen corresponding path program 43 times [2021-06-04 21:40:53,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:53,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077516040] [2021-06-04 21:40:53,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:53,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:53,708 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:53,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:53,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077516040] [2021-06-04 21:40:53,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077516040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:53,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087107932] [2021-06-04 21:40:53,709 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 [2021-06-04 21:40:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:53,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:40:53,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:53,885 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:53,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087107932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:53,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:53,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-04 21:40:53,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312464885] [2021-06-04 21:40:53,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:40:53,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:53,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:40:53,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:40:53,886 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:54,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:54,133 INFO L93 Difference]: Finished difference Result 3421 states and 8897 transitions. [2021-06-04 21:40:54,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-04 21:40:54,134 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-04 21:40:54,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:54,138 INFO L225 Difference]: With dead ends: 3421 [2021-06-04 21:40:54,138 INFO L226 Difference]: Without dead ends: 3151 [2021-06-04 21:40:54,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 237.3ms TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:40:54,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-06-04 21:40:54,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2478. [2021-06-04 21:40:54,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:54,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-04 21:40:54,169 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-04 21:40:54,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:54,169 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-04 21:40:54,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:54,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-04 21:40:54,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:40:54,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:54,171 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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] [2021-06-04 21:40:54,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:54,392 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:54,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:54,393 INFO L82 PathProgramCache]: Analyzing trace with hash -341232534, now seen corresponding path program 44 times [2021-06-04 21:40:54,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:54,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316442542] [2021-06-04 21:40:54,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:54,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:54,517 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:54,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:54,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316442542] [2021-06-04 21:40:54,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316442542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:54,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915230425] [2021-06-04 21:40:54,518 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 [2021-06-04 21:40:54,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:40:54,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:54,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:40:54,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:54,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915230425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:54,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:54,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-04 21:40:54,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225263390] [2021-06-04 21:40:54,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:40:54,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:54,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:40:54,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:40:54,724 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:55,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:55,121 INFO L93 Difference]: Finished difference Result 3371 states and 8797 transitions. [2021-06-04 21:40:55,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-04 21:40:55,121 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-04 21:40:55,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:55,126 INFO L225 Difference]: With dead ends: 3371 [2021-06-04 21:40:55,126 INFO L226 Difference]: Without dead ends: 3101 [2021-06-04 21:40:55,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 371.2ms TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:40:55,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3101 states. [2021-06-04 21:40:55,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3101 to 2478. [2021-06-04 21:40:55,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:55,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-04 21:40:55,158 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-04 21:40:55,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:55,158 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-04 21:40:55,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:55,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-04 21:40:55,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:40:55,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:55,161 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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] [2021-06-04 21:40:55,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-04 21:40:55,383 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:55,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:55,383 INFO L82 PathProgramCache]: Analyzing trace with hash 2074406872, now seen corresponding path program 45 times [2021-06-04 21:40:55,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:55,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689710999] [2021-06-04 21:40:55,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:55,509 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:55,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:55,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689710999] [2021-06-04 21:40:55,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689710999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:55,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661249794] [2021-06-04 21:40:55,510 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 [2021-06-04 21:40:55,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-04 21:40:55,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:55,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:40:55,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:55,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661249794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:55,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:55,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-04 21:40:55,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019357856] [2021-06-04 21:40:55,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:40:55,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:55,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:40:55,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:40:55,700 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:55,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:55,948 INFO L93 Difference]: Finished difference Result 3321 states and 8697 transitions. [2021-06-04 21:40:55,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-04 21:40:55,949 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-04 21:40:55,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:55,952 INFO L225 Difference]: With dead ends: 3321 [2021-06-04 21:40:55,952 INFO L226 Difference]: Without dead ends: 3051 [2021-06-04 21:40:55,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 237.2ms TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:40:55,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2021-06-04 21:40:55,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 2478. [2021-06-04 21:40:55,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:55,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-04 21:40:55,978 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-04 21:40:55,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:55,978 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-04 21:40:55,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:55,979 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-04 21:40:55,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:40:55,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:55,981 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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] [2021-06-04 21:40:56,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-04 21:40:56,181 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:56,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:56,182 INFO L82 PathProgramCache]: Analyzing trace with hash -190241112, now seen corresponding path program 46 times [2021-06-04 21:40:56,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:56,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637928010] [2021-06-04 21:40:56,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:56,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:56,291 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:56,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:56,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637928010] [2021-06-04 21:40:56,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637928010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:56,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598962525] [2021-06-04 21:40:56,291 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:56,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:40:56,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:56,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:40:56,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:56,451 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:56,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598962525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:56,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:56,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-04 21:40:56,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842724407] [2021-06-04 21:40:56,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:40:56,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:56,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:40:56,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:40:56,452 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:56,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:56,802 INFO L93 Difference]: Finished difference Result 3271 states and 8597 transitions. [2021-06-04 21:40:56,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-04 21:40:56,802 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-04 21:40:56,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:56,805 INFO L225 Difference]: With dead ends: 3271 [2021-06-04 21:40:56,805 INFO L226 Difference]: Without dead ends: 3001 [2021-06-04 21:40:56,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 333.9ms TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:40:56,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-06-04 21:40:56,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 2478. [2021-06-04 21:40:56,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:56,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-04 21:40:56,830 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-04 21:40:56,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:56,830 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-04 21:40:56,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:56,830 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-04 21:40:56,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:40:56,832 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:56,832 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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] [2021-06-04 21:40:57,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-04 21:40:57,033 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:57,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:57,033 INFO L82 PathProgramCache]: Analyzing trace with hash 423998358, now seen corresponding path program 47 times [2021-06-04 21:40:57,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:57,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588548436] [2021-06-04 21:40:57,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:57,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:57,147 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:57,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:57,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588548436] [2021-06-04 21:40:57,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588548436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:57,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522249672] [2021-06-04 21:40:57,147 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:57,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-04 21:40:57,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:57,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:40:57,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:57,311 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:57,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522249672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:57,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:57,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-04 21:40:57,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211539805] [2021-06-04 21:40:57,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:40:57,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:57,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:40:57,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:40:57,313 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:57,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:57,620 INFO L93 Difference]: Finished difference Result 3221 states and 8497 transitions. [2021-06-04 21:40:57,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-04 21:40:57,621 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-04 21:40:57,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:57,623 INFO L225 Difference]: With dead ends: 3221 [2021-06-04 21:40:57,623 INFO L226 Difference]: Without dead ends: 2951 [2021-06-04 21:40:57,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 263.2ms TimeCoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:40:57,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-06-04 21:40:57,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2478. [2021-06-04 21:40:57,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:57,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-04 21:40:57,645 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-04 21:40:57,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:57,645 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-04 21:40:57,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:57,646 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-04 21:40:57,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:40:57,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:57,647 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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] [2021-06-04 21:40:57,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:57,860 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:57,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:57,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1291243930, now seen corresponding path program 48 times [2021-06-04 21:40:57,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:57,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756801188] [2021-06-04 21:40:57,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:57,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:57,968 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:57,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:57,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756801188] [2021-06-04 21:40:57,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756801188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:57,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393226183] [2021-06-04 21:40:57,968 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:58,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-04 21:40:58,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:58,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:40:58,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:58,163 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:58,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393226183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:58,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:58,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-04 21:40:58,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392808865] [2021-06-04 21:40:58,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:40:58,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:58,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:40:58,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:40:58,164 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:58,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:58,592 INFO L93 Difference]: Finished difference Result 3679 states and 9763 transitions. [2021-06-04 21:40:58,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-04 21:40:58,592 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-04 21:40:58,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:58,595 INFO L225 Difference]: With dead ends: 3679 [2021-06-04 21:40:58,595 INFO L226 Difference]: Without dead ends: 3056 [2021-06-04 21:40:58,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 391.1ms TimeCoverageRelationStatistics Valid=381, Invalid=1179, Unknown=0, NotChecked=0, Total=1560 [2021-06-04 21:40:58,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2021-06-04 21:40:58,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 2388. [2021-06-04 21:40:58,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 2.785085881860075) internal successors, (6648), 2387 states have internal predecessors, (6648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:58,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 6648 transitions. [2021-06-04 21:40:58,623 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 6648 transitions. Word has length 80 [2021-06-04 21:40:58,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:58,624 INFO L482 AbstractCegarLoop]: Abstraction has 2388 states and 6648 transitions. [2021-06-04 21:40:58,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:58,624 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 6648 transitions. [2021-06-04 21:40:58,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:40:58,626 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:58,626 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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] [2021-06-04 21:40:58,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:58,829 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:58,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:58,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1971075764, now seen corresponding path program 49 times [2021-06-04 21:40:58,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:58,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080119997] [2021-06-04 21:40:58,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:58,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:58,930 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:58,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:58,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080119997] [2021-06-04 21:40:58,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080119997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:58,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124906791] [2021-06-04 21:40:58,931 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:59,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:59,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:40:59,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:59,112 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:59,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124906791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:59,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:59,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-04 21:40:59,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635616768] [2021-06-04 21:40:59,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:40:59,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:59,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:40:59,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:40:59,113 INFO L87 Difference]: Start difference. First operand 2388 states and 6648 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:59,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:40:59,455 INFO L93 Difference]: Finished difference Result 3908 states and 10481 transitions. [2021-06-04 21:40:59,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-04 21:40:59,456 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-04 21:40:59,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:40:59,459 INFO L225 Difference]: With dead ends: 3908 [2021-06-04 21:40:59,459 INFO L226 Difference]: Without dead ends: 3638 [2021-06-04 21:40:59,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 293.8ms TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:40:59,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3638 states. [2021-06-04 21:40:59,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3638 to 2568. [2021-06-04 21:40:59,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 2567 states have (on average 2.8075574600701207) internal successors, (7207), 2567 states have internal predecessors, (7207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:59,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 7207 transitions. [2021-06-04 21:40:59,488 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 7207 transitions. Word has length 80 [2021-06-04 21:40:59,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:40:59,488 INFO L482 AbstractCegarLoop]: Abstraction has 2568 states and 7207 transitions. [2021-06-04 21:40:59,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:40:59,488 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 7207 transitions. [2021-06-04 21:40:59,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:40:59,490 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:40:59,490 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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] [2021-06-04 21:40:59,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-04 21:40:59,691 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:40:59,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:40:59,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1993419014, now seen corresponding path program 50 times [2021-06-04 21:40:59,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:40:59,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162225083] [2021-06-04 21:40:59,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:40:59,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:40:59,792 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:59,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:40:59,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162225083] [2021-06-04 21:40:59,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162225083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:59,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096434290] [2021-06-04 21:40:59,793 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:40:59,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:40:59,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:40:59,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:40:59,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:40:59,960 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:40:59,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096434290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:40:59,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:40:59,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-04 21:40:59,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252457691] [2021-06-04 21:40:59,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:40:59,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:40:59,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:40:59,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:40:59,961 INFO L87 Difference]: Start difference. First operand 2568 states and 7207 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:00,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:00,371 INFO L93 Difference]: Finished difference Result 3203 states and 8605 transitions. [2021-06-04 21:41:00,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:41:00,372 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-04 21:41:00,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:00,374 INFO L225 Difference]: With dead ends: 3203 [2021-06-04 21:41:00,374 INFO L226 Difference]: Without dead ends: 2831 [2021-06-04 21:41:00,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 385.6ms TimeCoverageRelationStatistics Valid=416, Invalid=1066, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:41:00,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2831 states. [2021-06-04 21:41:00,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2831 to 2483. [2021-06-04 21:41:00,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 2482 states have (on average 2.78928283642224) internal successors, (6923), 2482 states have internal predecessors, (6923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:00,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 6923 transitions. [2021-06-04 21:41:00,396 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 6923 transitions. Word has length 80 [2021-06-04 21:41:00,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:00,396 INFO L482 AbstractCegarLoop]: Abstraction has 2483 states and 6923 transitions. [2021-06-04 21:41:00,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:00,396 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 6923 transitions. [2021-06-04 21:41:00,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-04 21:41:00,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:00,398 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 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] [2021-06-04 21:41:00,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-04 21:41:00,599 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:00,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:00,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1150498713, now seen corresponding path program 51 times [2021-06-04 21:41:00,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:00,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055415602] [2021-06-04 21:41:00,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:00,689 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 77 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:00,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:00,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055415602] [2021-06-04 21:41:00,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055415602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:00,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434875770] [2021-06-04 21:41:00,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:00,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-04 21:41:00,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:00,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:41:00,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:00,896 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:00,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434875770] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:41:00,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-04 21:41:00,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-06-04 21:41:00,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891618914] [2021-06-04 21:41:00,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-04 21:41:00,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:00,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-04 21:41:00,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:41:00,899 INFO L87 Difference]: Start difference. First operand 2483 states and 6923 transitions. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:01,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:01,049 INFO L93 Difference]: Finished difference Result 5807 states and 15758 transitions. [2021-06-04 21:41:01,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-04 21:41:01,049 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-04 21:41:01,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:01,051 INFO L225 Difference]: With dead ends: 5807 [2021-06-04 21:41:01,051 INFO L226 Difference]: Without dead ends: 1279 [2021-06-04 21:41:01,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:41:01,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-06-04 21:41:01,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1279. [2021-06-04 21:41:01,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 1278 states have (on average 2.5610328638497655) internal successors, (3273), 1278 states have internal predecessors, (3273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:01,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 3273 transitions. [2021-06-04 21:41:01,064 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 3273 transitions. Word has length 85 [2021-06-04 21:41:01,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:01,064 INFO L482 AbstractCegarLoop]: Abstraction has 1279 states and 3273 transitions. [2021-06-04 21:41:01,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:01,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 3273 transitions. [2021-06-04 21:41:01,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-04 21:41:01,066 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:01,066 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 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] [2021-06-04 21:41:01,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:01,287 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:01,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:01,288 INFO L82 PathProgramCache]: Analyzing trace with hash -489817904, now seen corresponding path program 52 times [2021-06-04 21:41:01,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:01,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727543680] [2021-06-04 21:41:01,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:01,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 81 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:01,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:01,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727543680] [2021-06-04 21:41:01,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727543680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:01,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583891837] [2021-06-04 21:41:01,378 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:01,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:41:01,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:01,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:41:01,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:01,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583891837] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:41:01,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-04 21:41:01,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-06-04 21:41:01,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370560936] [2021-06-04 21:41:01,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-04 21:41:01,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:01,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-04 21:41:01,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:41:01,550 INFO L87 Difference]: Start difference. First operand 1279 states and 3273 transitions. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:01,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:01,682 INFO L93 Difference]: Finished difference Result 2288 states and 5575 transitions. [2021-06-04 21:41:01,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-04 21:41:01,682 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-04 21:41:01,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:01,682 INFO L225 Difference]: With dead ends: 2288 [2021-06-04 21:41:01,682 INFO L226 Difference]: Without dead ends: 0 [2021-06-04 21:41:01,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 128.4ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:41:01,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-04 21:41:01,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-04 21:41:01,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:01,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-04 21:41:01,683 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 85 [2021-06-04 21:41:01,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:01,683 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-04 21:41:01,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:01,683 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-04 21:41:01,683 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-04 21:41:01,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-04 21:41:01,885 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-04 21:41:01,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.06 09:41:01 BasicIcfg [2021-06-04 21:41:01,887 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-04 21:41:01,887 INFO L168 Benchmark]: Toolchain (without parser) took 48491.10 ms. Allocated memory was 394.3 MB in the beginning and 824.2 MB in the end (delta: 429.9 MB). Free memory was 358.1 MB in the beginning and 723.9 MB in the end (delta: -365.8 MB). Peak memory consumption was 65.4 MB. Max. memory is 16.0 GB. [2021-06-04 21:41:01,887 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 394.3 MB. Free memory is still 376.5 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-04 21:41:01,887 INFO L168 Benchmark]: CACSL2BoogieTranslator took 570.75 ms. Allocated memory is still 394.3 MB. Free memory was 357.9 MB in the beginning and 356.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 13.2 MB. Max. memory is 16.0 GB. [2021-06-04 21:41:01,887 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.56 ms. Allocated memory is still 394.3 MB. Free memory was 356.8 MB in the beginning and 354.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-04 21:41:01,887 INFO L168 Benchmark]: Boogie Preprocessor took 18.19 ms. Allocated memory is still 394.3 MB. Free memory was 354.7 MB in the beginning and 353.6 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-04 21:41:01,888 INFO L168 Benchmark]: RCFGBuilder took 459.92 ms. Allocated memory is still 394.3 MB. Free memory was 353.6 MB in the beginning and 330.5 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-06-04 21:41:01,888 INFO L168 Benchmark]: TraceAbstraction took 47374.77 ms. Allocated memory was 394.3 MB in the beginning and 824.2 MB in the end (delta: 429.9 MB). Free memory was 330.5 MB in the beginning and 723.9 MB in the end (delta: -393.4 MB). Peak memory consumption was 39.7 MB. Max. memory is 16.0 GB. [2021-06-04 21:41:01,888 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 394.3 MB. Free memory is still 376.5 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 570.75 ms. Allocated memory is still 394.3 MB. Free memory was 357.9 MB in the beginning and 356.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 13.2 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 47.56 ms. Allocated memory is still 394.3 MB. Free memory was 356.8 MB in the beginning and 354.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 18.19 ms. Allocated memory is still 394.3 MB. Free memory was 354.7 MB in the beginning and 353.6 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 459.92 ms. Allocated memory is still 394.3 MB. Free memory was 353.6 MB in the beginning and 330.5 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 47374.77 ms. Allocated memory was 394.3 MB in the beginning and 824.2 MB in the end (delta: 429.9 MB). Free memory was 330.5 MB in the beginning and 723.9 MB in the end (delta: -393.4 MB). Peak memory consumption was 39.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 47291.4ms, OverallIterations: 63, TraceHistogramMax: 6, EmptinessCheckTime: 157.8ms, AutomataDifference: 15566.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 89.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6276 SDtfs, 24236 SDslu, 39721 SDs, 0 SdLazy, 6940 SolverSat, 2749 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3713.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5368 GetRequests, 3809 SyntacticMatches, 0 SemanticMatches, 1559 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8583 ImplicationChecksByTransitivity, 13911.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2568occurred in iteration=60, InterpolantAutomatonStates: 1287, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1842.3ms AutomataMinimizationTime, 63 MinimizatonAttempts, 30890 StatesRemovedByMinimization, 61 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 717.7ms SsaConstructionTime, 1570.0ms SatisfiabilityAnalysisTime, 12774.6ms InterpolantComputationTime, 7864 NumberOfCodeBlocks, 7854 NumberOfCodeBlocksAsserted, 229 NumberOfCheckSat, 7745 ConstructedInterpolants, 0 QuantifiedInterpolants, 29437 SizeOfPredicates, 472 NumberOfNonLiveVariables, 8746 ConjunctsInSsa, 746 ConjunctsInUnsatCore, 119 InterpolantComputations, 9 PerfectInterpolantSequences, 373/4758 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...